field.cc

/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */


/*****************************************************************************
** This file implements classes defined in field.h
*****************************************************************************/

#ifdef USE_PRAGMA_IMPLEMENTATION
#pragma implementation				// gcc: Class implementation
#endif

#include "mysql_priv.h"
#include "sql_select.h"
#include <m_ctype.h>
#include <errno.h>
#ifdef HAVE_FCONVERT
#include <floatingpoint.h>
#endif

// Maximum allowed exponent value for converting string to decimal
#define MAX_EXPONENT 1024

/*****************************************************************************
  Instansiate templates and static variables
*****************************************************************************/

#ifdef HAVE_EXPLICIT_TEMPLATE_INSTANTIATION
template class List<create_field>;
template class List_iterator<create_field>;
#endif

uchar Field_null::null[1]={1};
const char field_separator=',';

#define DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE 320
#define BLOB_PACK_LENGTH_TO_MAX_LENGH(arg) \
((ulong) ((LL(1) << min(arg, 4) * 8) - LL(1)))

/*
  Rules for merging different types of fields in UNION

  NOTE: to avoid 256*256 table, gap in table types numeration is skiped
  following #defines describe that gap and how to canculate number of fields
  and index of field in thia array.
*/
#define FIELDTYPE_TEAR_FROM (MYSQL_TYPE_BIT + 1)
#define FIELDTYPE_TEAR_TO   (MYSQL_TYPE_NEWDECIMAL - 1)
#define FIELDTYPE_NUM (FIELDTYPE_TEAR_FROM + (255 - FIELDTYPE_TEAR_TO))
inline int field_type2index (enum_field_types field_type)
{
  return (field_type < FIELDTYPE_TEAR_FROM ?
          field_type :
          ((int)FIELDTYPE_TEAR_FROM) + (field_type - FIELDTYPE_TEAR_TO) - 1);
}

static enum_field_types field_types_merge_rules [FIELDTYPE_NUM][FIELDTYPE_NUM]=
{
  /* MYSQL_TYPE_DECIMAL -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_NEWDECIMAL,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_NEWDECIMAL,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_DOUBLE,      MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_DECIMAL,     MYSQL_TYPE_DECIMAL,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_TINY -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_TINY,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_SHORT,       MYSQL_TYPE_LONG,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_FLOAT,       MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_TINY,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_LONGLONG,    MYSQL_TYPE_INT24,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_SHORT -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_SHORT,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_SHORT,       MYSQL_TYPE_LONG,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_FLOAT,       MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_SHORT,       MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_LONGLONG,    MYSQL_TYPE_INT24,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_SHORT,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_LONG -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_LONG,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_LONG,        MYSQL_TYPE_LONG,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_DOUBLE,      MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_LONG,         MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_LONGLONG,    MYSQL_TYPE_INT24,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_LONG,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_FLOAT -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_DOUBLE,      MYSQL_TYPE_FLOAT,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_FLOAT,       MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_FLOAT,       MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_FLOAT,       MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_FLOAT,       MYSQL_TYPE_INT24,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_FLOAT,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_DOUBLE,      MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_DOUBLE -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_DOUBLE,      MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_DOUBLE,      MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_DOUBLE,      MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_DOUBLE,      MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_DOUBLE,      MYSQL_TYPE_INT24,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_DOUBLE,      MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_NULL -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_TINY,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_SHORT,       MYSQL_TYPE_LONG,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_FLOAT,       MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_NULL,        MYSQL_TYPE_TIMESTAMP,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_LONGLONG,    MYSQL_TYPE_INT24,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_TIME,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_DATETIME,    MYSQL_TYPE_YEAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_BIT,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_ENUM,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_SET,         MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_GEOMETRY
  },
  /* MYSQL_TYPE_TIMESTAMP -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_TIMESTAMP,   MYSQL_TYPE_TIMESTAMP,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_DATETIME,    MYSQL_TYPE_DATETIME,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_DATETIME,    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_LONGLONG -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_LONGLONG,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_LONGLONG,    MYSQL_TYPE_LONGLONG,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_DOUBLE,      MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_LONGLONG,    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_LONGLONG,    MYSQL_TYPE_LONG,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_LONGLONG,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_INT24 -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_INT24,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_INT24,       MYSQL_TYPE_LONG,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_FLOAT,       MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_INT24,       MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_LONGLONG,    MYSQL_TYPE_INT24,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_INT24,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL    MYSQL_TYPE_ENUM
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_DATE -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_DATETIME,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_DATETIME,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_DATETIME,    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,  MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_TIME -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_TIME,        MYSQL_TYPE_DATETIME,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_DATETIME,    MYSQL_TYPE_TIME,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_DATETIME,    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_DATETIME -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_DATETIME,    MYSQL_TYPE_DATETIME,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_DATETIME,    MYSQL_TYPE_DATETIME,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_DATETIME,    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_YEAR -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_DECIMAL,     MYSQL_TYPE_TINY,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_SHORT,       MYSQL_TYPE_LONG,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_FLOAT,       MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_YEAR,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_LONGLONG,    MYSQL_TYPE_INT24,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_YEAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_NEWDATE -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_DATETIME,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_DATETIME,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_DATETIME,    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_NEWDATE,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_VARCHAR -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_BIT -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_BIT,         MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_BIT,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_NEWDECIMAL -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_NEWDECIMAL,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_NEWDECIMAL,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_DOUBLE,      MYSQL_TYPE_DOUBLE,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_NEWDECIMAL,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_NEWDECIMAL,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_ENUM -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_ENUM,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_SET -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_SET,         MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_TINY_BLOB -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_TINY_BLOB,   MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_TINY_BLOB,   MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_TINY_BLOB,   MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_TINY_BLOB,   MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_TINY_BLOB,   MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_TINY_BLOB,   MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_TINY_BLOB,   MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_TINY_BLOB,   MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_TINY_BLOB,   MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_TINY_BLOB,   MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_TINY_BLOB,   MYSQL_TYPE_TINY_BLOB
  },
  /* MYSQL_TYPE_MEDIUM_BLOB -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_MEDIUM_BLOB,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_MEDIUM_BLOB,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_MEDIUM_BLOB,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_MEDIUM_BLOB,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_MEDIUM_BLOB,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_MEDIUM_BLOB,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_MEDIUM_BLOB,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_MEDIUM_BLOB,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_MEDIUM_BLOB,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_MEDIUM_BLOB,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_MEDIUM_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_MEDIUM_BLOB,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_MEDIUM_BLOB
  },
  /* MYSQL_TYPE_LONG_BLOB -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_LONG_BLOB,   MYSQL_TYPE_LONG_BLOB
  },
  /* MYSQL_TYPE_BLOB -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_BLOB,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_BLOB,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_BLOB,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_BLOB,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_BLOB,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_BLOB,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_BLOB,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_BLOB,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_BLOB,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_BLOB,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_BLOB,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_BLOB
  },
  /* MYSQL_TYPE_VAR_STRING -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR
  },
  /* MYSQL_TYPE_STRING -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_STRING,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_STRING,      MYSQL_TYPE_STRING,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_STRING,      MYSQL_TYPE_STRING,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_STRING,      MYSQL_TYPE_STRING,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_STRING,      MYSQL_TYPE_STRING,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_STRING,      MYSQL_TYPE_STRING,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_STRING,      MYSQL_TYPE_STRING,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_STRING,      MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_STRING,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_STRING,      MYSQL_TYPE_STRING,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_STRING,      MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_STRING
  },
  /* MYSQL_TYPE_GEOMETRY -> */
  {
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
    MYSQL_TYPE_GEOMETRY,    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_BIT          <16>-<245>
    MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
    MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_TINY_BLOB,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
    MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
    MYSQL_TYPE_BLOB,        MYSQL_TYPE_VARCHAR,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
    MYSQL_TYPE_STRING,      MYSQL_TYPE_GEOMETRY
  }
};

/*
  Return type of which can carry value of both given types in UNION result

  SYNOPSIS
    Field::field_type_merge()
    a, b  types for merging

  RETURN
    type of field
*/

enum_field_types Field::field_type_merge(enum_field_types a,
                                         enum_field_types b)
{
  DBUG_ASSERT(a < FIELDTYPE_TEAR_FROM || a > FIELDTYPE_TEAR_TO);
  DBUG_ASSERT(b < FIELDTYPE_TEAR_FROM || b > FIELDTYPE_TEAR_TO);
  return field_types_merge_rules[field_type2index(a)]
                                [field_type2index(b)];
}


static Item_result field_types_result_type [FIELDTYPE_NUM]=
{
  //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
  DECIMAL_RESULT,           INT_RESULT,
  //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
  INT_RESULT,               INT_RESULT,
  //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
  REAL_RESULT,              REAL_RESULT,
  //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
  STRING_RESULT,            STRING_RESULT,
  //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
  INT_RESULT,               INT_RESULT,
  //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
  STRING_RESULT,            STRING_RESULT,
  //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
  STRING_RESULT,            INT_RESULT,
  //MYSQL_TYPE_NEWDATE      MYSQL_TYPE_VARCHAR
  STRING_RESULT,            STRING_RESULT,
  //MYSQL_TYPE_BIT          <16>-<245>
  STRING_RESULT,
  //MYSQL_TYPE_NEWDECIMAL   MYSQL_TYPE_ENUM
  DECIMAL_RESULT,           STRING_RESULT,
  //MYSQL_TYPE_SET          MYSQL_TYPE_TINY_BLOB
  STRING_RESULT,            STRING_RESULT,
  //MYSQL_TYPE_MEDIUM_BLOB  MYSQL_TYPE_LONG_BLOB
  STRING_RESULT,            STRING_RESULT,
  //MYSQL_TYPE_BLOB         MYSQL_TYPE_VAR_STRING
  STRING_RESULT,            STRING_RESULT,
  //MYSQL_TYPE_STRING       MYSQL_TYPE_GEOMETRY
  STRING_RESULT,            STRING_RESULT
};


/*
  Detect Item_result by given field type of UNION merge result

  SYNOPSIS
    Field::result_merge_type()
    field_type  given field type

  RETURN
    Item_result (type of internal MySQL expression result)
*/

Item_result Field::result_merge_type(enum_field_types field_type)
{
  DBUG_ASSERT(field_type < FIELDTYPE_TEAR_FROM || field_type
              > FIELDTYPE_TEAR_TO);
  return field_types_result_type[field_type2index(field_type)];
}

/*****************************************************************************
  Static help functions
*****************************************************************************/


/*
  Check whether a field type can be partially indexed by a key

  This is a static method, rather than a virtual function, because we need
  to check the type of a non-Field in mysql_alter_table().

  SYNOPSIS
   type_can_have_key_part()
   type                 field type

  RETURN
    TRUE  Type can have a prefixed key
    FALSE Type can not have a prefixed key
*/

bool Field::type_can_have_key_part(enum enum_field_types type)
{
  switch (type) {
  case MYSQL_TYPE_VARCHAR:
  case MYSQL_TYPE_TINY_BLOB:
  case MYSQL_TYPE_MEDIUM_BLOB:
  case MYSQL_TYPE_LONG_BLOB:
  case MYSQL_TYPE_BLOB:
  case MYSQL_TYPE_VAR_STRING:
  case MYSQL_TYPE_STRING:
    return TRUE;
  default:
    return FALSE;
  }
}


/*
  Numeric fields base class constructor
*/
Field_num::Field_num(char *ptr_arg,uint32 len_arg, uchar *null_ptr_arg,
                     uchar null_bit_arg, utype unireg_check_arg,
                     const char *field_name_arg,
                     struct st_table *table_arg,
                     uint8 dec_arg, bool zero_arg, bool unsigned_arg)
  :Field(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
         unireg_check_arg, field_name_arg, table_arg),
  dec(dec_arg),zerofill(zero_arg),unsigned_flag(unsigned_arg)
{
  if (zerofill)
    flags|=ZEROFILL_FLAG;
  if (unsigned_flag)
    flags|=UNSIGNED_FLAG;
}


void Field_num::prepend_zeros(String *value)
{
  int diff;
  if ((diff= (int) (field_length - value->length())) > 0)
  {
    bmove_upp((char*) value->ptr()+field_length,value->ptr()+value->length(),
	      value->length());
    bfill((char*) value->ptr(),diff,'0');
    value->length(field_length);
    (void) value->c_ptr_quick();		// Avoid warnings in purify
  }
}

/*
  Test if given number is a int (or a fixed format float with .000)

  SYNOPSIS
    test_if_int()
    str		String to test
    end		Pointer to char after last used digit
    cs		Character set

  NOTES
    This is called after one has called my_strntol() or similar function.
    This is only used to give warnings in ALTER TABLE or LOAD DATA...

  TODO
    Make this multi-byte-character safe

  RETURN
    0	OK
    1	error.  A warning is pushed if field_name != 0
*/

bool Field::check_int(const char *str, int length, const char *int_end,
                      CHARSET_INFO *cs)
{
  const char *end;
  if (str == int_end)
  {
    char buff[128];
    String tmp(buff,(uint32) sizeof(buff), system_charset_info);
    tmp.copy(str, length, system_charset_info);
    push_warning_printf(table->in_use, MYSQL_ERROR::WARN_LEVEL_WARN,
                        ER_TRUNCATED_WRONG_VALUE_FOR_FIELD, 
                        ER(ER_TRUNCATED_WRONG_VALUE_FOR_FIELD),
                        "integer", tmp.c_ptr(), field_name,
                        (ulong) table->in_use->row_count);
    return 1;					// Empty string
  }
  end= str+length;
  if ((str= int_end) == end)
    return 0;					// OK; All digits was used

  /* Allow end .0000 */
  if (*str == '.')
  {
    for (str++ ; str != end && *str == '0'; str++)
      ;
  }
  /* Allow end space */
  for ( ; str != end ; str++)
  {
    if (!my_isspace(cs,*str))
    {
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
      return 1;
    }
  }
  return 0;
}


/*
  Process decimal library return codes and issue warnings for overflow and
  truncation.

  SYNOPSIS
    Field::warn_if_overflow()
    op_result  decimal library return code (E_DEC_* see include/decimal.h)

  RETURN
    1  there was overflow
    0  no error or some other errors except overflow
*/

int Field::warn_if_overflow(int op_result)
{
  if (op_result == E_DEC_OVERFLOW)
  {
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
    return 1;
  }
  if (op_result == E_DEC_TRUNCATED)
  {
    set_warning(MYSQL_ERROR::WARN_LEVEL_NOTE, WARN_DATA_TRUNCATED, 1);
    /* We return 0 here as this is not a critical issue */
  }
  return 0;
}


#ifdef NOT_USED
static bool test_if_real(const char *str,int length, CHARSET_INFO *cs)
{
  cs= system_charset_info; // QQ move test_if_real into CHARSET_INFO struct

  while (length && my_isspace(cs,*str))
  {						// Allow start space
    length--; str++;
  }
  if (!length)
    return 0;
  if (*str == '+' || *str == '-')
  {
    length--; str++;
    if (!length || !(my_isdigit(cs,*str) || *str == '.'))
      return 0;
  }
  while (length && my_isdigit(cs,*str))
  {
    length--; str++;
  }
  if (!length)
    return 1;
  if (*str == '.')
  {
    length--; str++;
    while (length && my_isdigit(cs,*str))
    {
      length--; str++;
    }
  }
  if (!length)
    return 1;
  if (*str == 'E' || *str == 'e')
  {
    if (length < 3 || (str[1] != '+' && str[1] != '-') || 
        !my_isdigit(cs,str[2]))
      return 0;
    length-=3;
    str+=3;
    while (length && my_isdigit(cs,*str))
    {
      length--; str++;
    }
  }
  for (; length ; length--, str++)
  {						// Allow end space
    if (!my_isspace(cs,*str))
      return 0;
  }
  return 1;
}
#endif


/*
  Interpret field value as an integer but return the result as a string.

  This is used for printing bit_fields as numbers while debugging
*/

String *Field::val_int_as_str(String *val_buffer, my_bool unsigned_val)
{
  CHARSET_INFO *cs= &my_charset_bin;
  uint length= 21;
  longlong value= val_int();
  if (val_buffer->alloc(length))
    return 0;
  length= (uint) (*cs->cset->longlong10_to_str)(cs, (char*) val_buffer->ptr(),
                                                length,
                                                unsigned_val ? 10 : -10,
                                                value);
  val_buffer->length(length);
  return val_buffer;
}


/* This is used as a table name when the table structure is not set up */
const char *unknown_table_name= 0;

Field::Field(char *ptr_arg,uint32 length_arg,uchar *null_ptr_arg,
	     uchar null_bit_arg,
	     utype unireg_check_arg, const char *field_name_arg,
	     struct st_table *table_arg)
  :ptr(ptr_arg), null_ptr(null_ptr_arg),
   table(table_arg),orig_table(table_arg),
   table_name(table_arg ? &table_arg->alias : &unknown_table_name),
   field_name(field_name_arg),
   query_id(0), key_start(0), part_of_key(0), part_of_sortkey(0),
   unireg_check(unireg_check_arg),
   field_length(length_arg), null_bit(null_bit_arg) 
{
  flags=null_ptr ? 0: NOT_NULL_FLAG;
  comment.str= (char*) "";
  comment.length=0;
}

uint Field::offset()
{
  return (uint) (ptr - (char*) table->record[0]);
}


void Field::copy_from_tmp(int row_offset)
{
  memcpy(ptr,ptr+row_offset,pack_length());
  if (null_ptr)
  {
    *null_ptr= (uchar) ((null_ptr[0] & (uchar) ~(uint) null_bit) |
			null_ptr[row_offset] & (uchar) null_bit);
  }
}


bool Field::send_binary(Protocol *protocol)
{
  char buff[MAX_FIELD_WIDTH];
  String tmp(buff,sizeof(buff),charset());
  val_str(&tmp);
  return protocol->store(tmp.ptr(), tmp.length(), tmp.charset());
}


my_decimal *Field::val_decimal(my_decimal *decimal)
{
  /* This never have to be called */
  DBUG_ASSERT(0);
  return 0;
}


void Field_num::add_zerofill_and_unsigned(String &res) const
{
  if (unsigned_flag)
    res.append(STRING_WITH_LEN(" unsigned"));
  if (zerofill)
    res.append(STRING_WITH_LEN(" zerofill"));
}


void Field::make_field(Send_field *field)
{
  if (orig_table->s->table_cache_key && *(orig_table->s->table_cache_key))
  {
    field->org_table_name= orig_table->s->table_name;
    field->db_name= orig_table->s->table_cache_key;
  }
  else
    field->org_table_name= field->db_name= "";
  field->table_name= orig_table->alias;
  field->col_name= field->org_col_name= field_name;
  field->charsetnr= charset()->number;
  field->length=field_length;
  field->type=type();
  field->flags=table->maybe_null ? (flags & ~NOT_NULL_FLAG) : flags;
  field->decimals= 0;
}


/*
  Conversion from decimal to longlong with checking overflow and
  setting correct value (min/max) in case of overflow

  SYNOPSIS
    Field::convert_decimal2longlong()
    val             value which have to be converted
    unsigned_flag   type of integer in which we convert val
    err             variable to pass error code

  RETURN
    value converted from val
*/
longlong Field::convert_decimal2longlong(const my_decimal *val,
                                         bool unsigned_flag, int *err)
{
  longlong i;
  if (unsigned_flag)
  {
    if (val->sign())
    {
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      i= 0;
      *err= 1;
    }
    else if (warn_if_overflow(my_decimal2int(E_DEC_ERROR &
                                           ~E_DEC_OVERFLOW & ~E_DEC_TRUNCATED,
                                           val, TRUE, &i)))
    {
      i= ~(longlong) 0;
      *err= 1;
    }
  }
  else if (warn_if_overflow(my_decimal2int(E_DEC_ERROR &
                                         ~E_DEC_OVERFLOW & ~E_DEC_TRUNCATED,
                                         val, FALSE, &i)))
  {
    i= (val->sign() ? LONGLONG_MIN : LONGLONG_MAX);
    *err= 1;
  }
  return i;
}


/*
  Storing decimal in integer fields.

  SYNOPSIS
    Field_num::store_decimal()
    val       value for storing

  NOTE
    This method is used by all integer fields, real/decimal redefine it

  RETURN
    0     OK
    != 0  error
*/

int Field_num::store_decimal(const my_decimal *val)
{
  int err= 0;
  longlong i= convert_decimal2longlong(val, unsigned_flag, &err);
  return test(err | store(i, unsigned_flag));
}


/*
  Return decimal value of integer field

  SYNOPSIS
    Field_num::val_decimal()
    decimal_value     buffer for storing decimal value

  NOTE
    This method is used by all integer fields, real/decimal redefine it
    All longlong values fit in our decimal buffer which cal store 8*9=72
    digits of integer number

  RETURN
    pointer to decimal buffer with value of field
*/

my_decimal* Field_num::val_decimal(my_decimal *decimal_value)
{
  DBUG_ASSERT(result_type() == INT_RESULT);
  longlong nr= val_int();
  int2my_decimal(E_DEC_FATAL_ERROR, nr, unsigned_flag, decimal_value);
  return decimal_value;
}


Field_str::Field_str(char *ptr_arg,uint32 len_arg, uchar *null_ptr_arg,
                     uchar null_bit_arg, utype unireg_check_arg,
                     const char *field_name_arg,
                     struct st_table *table_arg,CHARSET_INFO *charset)
  :Field(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
         unireg_check_arg, field_name_arg, table_arg)
{
  field_charset=charset;
  if (charset->state & MY_CS_BINSORT)
    flags|=BINARY_FLAG;
}


void Field_num::make_field(Send_field *field)
{
  Field::make_field(field);
  field->decimals= dec;
}

/*
  Decimal representation of Field_str

  SYNOPSIS
    Field_str::store_decimal()
    d         value for storing

  NOTE
    Field_str is the base class for fields like Field_enum, Field_date and some
    similar.  Some dates use fraction and also string value should be
    converted to floating point value according our rules, so we use double
    to store value of decimal in string

  RETURN
    0     OK
    != 0  error
*/

int Field_str::store_decimal(const my_decimal *d)
{
  double val;
  /* TODO: use decimal2string? */
  int err= warn_if_overflow(my_decimal2double(E_DEC_FATAL_ERROR &
                                            ~E_DEC_OVERFLOW, d, &val));
  return err | store(val);
}


my_decimal *Field_str::val_decimal(my_decimal *decimal_value)
{
  longlong nr= val_int();
  int2my_decimal(E_DEC_FATAL_ERROR, nr, 0, decimal_value);
  return decimal_value;
}


uint Field::fill_cache_field(CACHE_FIELD *copy)
{
  uint store_length;
  copy->str=ptr;
  copy->length=pack_length();
  copy->blob_field=0;
  if (flags & BLOB_FLAG)
  {
    copy->blob_field=(Field_blob*) this;
    copy->strip=0;
    copy->length-= table->s->blob_ptr_size;
    return copy->length;
  }
  else if (!zero_pack() &&
           (type() == MYSQL_TYPE_STRING && copy->length >= 4 &&
            copy->length < 256))
  {
    copy->strip=1;				/* Remove end space */
    store_length= 2;
  }
  else
  {
    copy->strip=0;
    store_length= 0;
  }
  return copy->length+ store_length;
}


bool Field::get_date(TIME *ltime,uint fuzzydate)
{
  char buff[40];
  String tmp(buff,sizeof(buff),&my_charset_bin),*res;
  if (!(res=val_str(&tmp)) ||
      str_to_datetime_with_warn(res->ptr(), res->length(),
                                ltime, fuzzydate) <= MYSQL_TIMESTAMP_ERROR)
    return 1;
  return 0;
}

bool Field::get_time(TIME *ltime)
{
  char buff[40];
  String tmp(buff,sizeof(buff),&my_charset_bin),*res;
  if (!(res=val_str(&tmp)) ||
      str_to_time_with_warn(res->ptr(), res->length(), ltime))
    return 1;
  return 0;
}

/*
  This is called when storing a date in a string

  NOTES
    Needs to be changed if/when we want to support different time formats
*/

int Field::store_time(TIME *ltime, timestamp_type type)
{
  char buff[MAX_DATE_STRING_REP_LENGTH];
  uint length= (uint) my_TIME_to_str(ltime, buff);
  return store(buff, length, &my_charset_bin);
}


bool Field::optimize_range(uint idx, uint part)
{
  return test(table->file->index_flags(idx, part, 1) & HA_READ_RANGE);
}


Field *Field::new_field(MEM_ROOT *root, struct st_table *new_table,
                        bool keep_type __attribute__((unused)))
{
  Field *tmp;
  if (!(tmp= (Field*) memdup_root(root,(char*) this,size_of())))
    return 0;

  if (tmp->table->maybe_null)
    tmp->flags&= ~NOT_NULL_FLAG;
  tmp->table= new_table;
  tmp->key_start.init(0);
  tmp->part_of_key.init(0);
  tmp->part_of_sortkey.init(0);
  tmp->unireg_check=Field::NONE;
  tmp->flags&= (NOT_NULL_FLAG | BLOB_FLAG | UNSIGNED_FLAG |
                ZEROFILL_FLAG | BINARY_FLAG | ENUM_FLAG | SET_FLAG);
  tmp->reset_fields();
  return tmp;
}


Field *Field::new_key_field(MEM_ROOT *root, struct st_table *new_table,
                            char *new_ptr, uchar *new_null_ptr,
                            uint new_null_bit)
{
  Field *tmp;
  if ((tmp= new_field(root, new_table, table == new_table)))
  {
    tmp->ptr=      new_ptr;
    tmp->null_ptr= new_null_ptr;
    tmp->null_bit= new_null_bit;
  }
  return tmp;
}


/****************************************************************************
  Field_null, a field that always return NULL
****************************************************************************/

void Field_null::sql_type(String &res) const
{
  res.set_ascii(STRING_WITH_LEN("null"));
}


/****************************************************************************
  Functions for the Field_decimal class
  This is an number stored as a pre-space (or pre-zero) string
****************************************************************************/

void
Field_decimal::reset(void)
{
  Field_decimal::store(STRING_WITH_LEN("0"),&my_charset_bin);
}

void Field_decimal::overflow(bool negative)
{
  uint len=field_length;
  char *to=ptr, filler= '9';

  set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
  if (negative)
  {
    if (!unsigned_flag)
    {
      /* Put - sign as a first digit so we'll have -999..999 or 999..999 */
      *to++ = '-';
      len--;
    }
    else
    {
      filler= '0';				// Fill up with 0
      if (!zerofill)
      {
	/*
	  Handle unsigned integer without zerofill, in which case
	  the number should be of format '   0' or '   0.000'
	*/
	uint whole_part=field_length- (dec ? dec+2 : 1);
	// Fill with spaces up to the first digit
	bfill(to, whole_part, ' ');
	to+=  whole_part;
	len-= whole_part;
	// The main code will also handle the 0 before the decimal point
      }
    }
  }
  bfill(to, len, filler);
  if (dec)
    ptr[field_length-dec-1]='.';
  return;
}


int Field_decimal::store(const char *from, uint len, CHARSET_INFO *cs)
{
  char buff[STRING_BUFFER_USUAL_SIZE];
  String tmp(buff,sizeof(buff), &my_charset_bin);

  /* Convert character set if the old one is multi byte */
  if (cs->mbmaxlen > 1)
  { 
    uint dummy_errors;
    tmp.copy(from, len, cs, &my_charset_bin, &dummy_errors);
    from= tmp.ptr();
    len=  tmp.length();
  }

  const char *end= from+len;
  /* The pointer where the field value starts (i.e., "where to write") */
  char *to=ptr;
  uint tmp_dec, tmp_uint;
  /*
    The sign of the number : will be 0 (means positive but sign not
    specified), '+' or '-'
  */
  char sign_char=0;
  /* The pointers where prezeros start and stop */
  const char *pre_zeros_from, *pre_zeros_end;
  /* The pointers where digits at the left of '.' start and stop */
  const char *int_digits_from, *int_digits_end;
  /* The pointers where digits at the right of '.' start and stop */
  const char *frac_digits_from, *frac_digits_end;
  /* The sign of the exponent : will be 0 (means no exponent), '+' or '-' */
  char expo_sign_char=0;
  uint exponent=0;                                // value of the exponent
  /*
    Pointers used when digits move from the left of the '.' to the
    right of the '.' (explained below)
  */
  const char *int_digits_tail_from;
  /* Number of 0 that need to be added at the left of the '.' (1E3: 3 zeros) */
  uint int_digits_added_zeros;
  /*
    Pointer used when digits move from the right of the '.' to the left
    of the '.'
  */
  const char *frac_digits_head_end;
  /* Number of 0 that need to be added at the right of the '.' (for 1E-3) */
  uint frac_digits_added_zeros;
  char *pos,*tmp_left_pos,*tmp_right_pos;
  /* Pointers that are used as limits (begin and end of the field buffer) */
  char *left_wall,*right_wall;
  char tmp_char;
  /*
    To remember if table->in_use->cuted_fields has already been incremented,
    to do that only once
  */
  bool is_cuted_fields_incr=0;

  LINT_INIT(int_digits_tail_from);
  LINT_INIT(int_digits_added_zeros);
  LINT_INIT(frac_digits_head_end);
  LINT_INIT(frac_digits_added_zeros);

  /*
    There are three steps in this function :
    - parse the input string
    - modify the position of digits around the decimal dot '.' 
      according to the exponent value (if specified)
    - write the formatted number
  */

  if ((tmp_dec=dec))
    tmp_dec++;

  /* skip pre-space */
  while (from != end && my_isspace(&my_charset_bin,*from))
    from++;
  if (from == end)
  {
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
    is_cuted_fields_incr=1;
  }
  else if (*from == '+' || *from == '-')	// Found some sign ?
  {
    sign_char= *from++;
    /*
      We allow "+" for unsigned decimal unless defined different
      Both options allowed as one may wish not to have "+" for unsigned numbers
      because of data processing issues
    */ 
    if (unsigned_flag)  
    { 
      if (sign_char=='-')
      {
        Field_decimal::overflow(1);
        return 1;
      }
      /* 
	 Defining this will not store "+" for unsigned decimal type even if
	 it is passed in numeric string. This will make some tests to fail
      */	 
#ifdef DONT_ALLOW_UNSIGNED_PLUS      
      else 
        sign_char=0;
#endif 	
    }
  }

  pre_zeros_from= from;
  for (; from!=end && *from == '0'; from++) ;	// Read prezeros
  pre_zeros_end=int_digits_from=from;      
  /* Read non zero digits at the left of '.'*/
  for (; from != end && my_isdigit(&my_charset_bin, *from) ; from++) ;
  int_digits_end=from;
  if (from!=end && *from == '.')		// Some '.' ?
    from++;
  frac_digits_from= from;
  /* Read digits at the right of '.' */
  for (;from!=end && my_isdigit(&my_charset_bin, *from); from++) ;
  frac_digits_end=from;
  // Some exponentiation symbol ?
  if (from != end && (*from == 'e' || *from == 'E'))
  {   
    from++;
    if (from != end && (*from == '+' || *from == '-'))  // Some exponent sign ?
      expo_sign_char= *from++;
    else
      expo_sign_char= '+';
    /*
      Read digits of the exponent and compute its value.  We must care about
      'exponent' overflow, because as unsigned arithmetic is "modulo", big 
      exponents will become small (e.g. 1e4294967296 will become 1e0, and the 
      field will finally contain 1 instead of its max possible value).
    */
    for (;from!=end && my_isdigit(&my_charset_bin, *from); from++)
    {
      exponent=10*exponent+(*from-'0');
      if (exponent>MAX_EXPONENT)
        break;
    }
  }
  
  /*
    We only have to generate warnings if count_cuted_fields is set.
    This is to avoid extra checks of the number when they are not needed.
    Even if this flag is not set, it's OK to increment warnings, if
    it makes the code easer to read.
  */

  if (table->in_use->count_cuted_fields)
  {
    // Skip end spaces
    for (;from != end && my_isspace(&my_charset_bin, *from); from++) ;
    if (from != end)                     // If still something left, warn
    {
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
      is_cuted_fields_incr=1;
    }
  }
  
  /*
    Now "move" digits around the decimal dot according to the exponent value,
    and add necessary zeros.
    Examples :
    - 1E+3 : needs 3 more zeros at the left of '.' (int_digits_added_zeros=3)
    - 1E-3 : '1' moves at the right of '.', and 2 more zeros are needed
    between '.' and '1'
    - 1234.5E-3 : '234' moves at the right of '.'
    These moves are implemented with pointers which point at the begin
    and end of each moved segment. Examples :
    - 1234.5E-3 : before the code below is executed, the int_digits part is
    from '1' to '4' and the frac_digits part from '5' to '5'. After the code
    below, the int_digits part is from '1' to '1', the frac_digits_head
    part is from '2' to '4', and the frac_digits part from '5' to '5'.
    - 1234.5E3 : before the code below is executed, the int_digits part is
    from '1' to '4' and the frac_digits part from '5' to '5'. After the code
    below, the int_digits part is from '1' to '4', the int_digits_tail
    part is from '5' to '5', the frac_digits part is empty, and
    int_digits_added_zeros=2 (to make 1234500).
  */
  
  /* 
     Below tmp_uint cannot overflow with small enough MAX_EXPONENT setting,
     as int_digits_added_zeros<=exponent<4G and 
     (int_digits_end-int_digits_from)<=max_allowed_packet<=2G and
     (frac_digits_from-int_digits_tail_from)<=max_allowed_packet<=2G
  */

  if (!expo_sign_char)
    tmp_uint=tmp_dec+(uint)(int_digits_end-int_digits_from);
  else if (expo_sign_char == '-') 
  {
    tmp_uint=min(exponent,(uint)(int_digits_end-int_digits_from));
    frac_digits_added_zeros=exponent-tmp_uint;
    int_digits_end -= tmp_uint;
    frac_digits_head_end=int_digits_end+tmp_uint;
    tmp_uint=tmp_dec+(uint)(int_digits_end-int_digits_from);     
  }
  else // (expo_sign_char=='+') 
  {
    tmp_uint=min(exponent,(uint)(frac_digits_end-frac_digits_from));
    int_digits_added_zeros=exponent-tmp_uint;
    int_digits_tail_from=frac_digits_from;
    frac_digits_from=frac_digits_from+tmp_uint;
    /*
      We "eat" the heading zeros of the 
      int_digits.int_digits_tail.int_digits_added_zeros concatenation
      (for example 0.003e3 must become 3 and not 0003)
    */
    if (int_digits_from == int_digits_end) 
    {
      /*
	There was nothing in the int_digits part, so continue
	eating int_digits_tail zeros
      */
      for (; int_digits_tail_from != frac_digits_from &&
	     *int_digits_tail_from == '0'; int_digits_tail_from++) ;
      if (int_digits_tail_from == frac_digits_from) 
      {
	// there were only zeros in int_digits_tail too
	int_digits_added_zeros=0;
      }
    }
    tmp_uint= (uint) (tmp_dec+(int_digits_end-int_digits_from)+
               (uint)(frac_digits_from-int_digits_tail_from)+
               int_digits_added_zeros);
  }
  
  /*
    Now write the formated number
    
    First the digits of the int_% parts.
    Do we have enough room to write these digits ?
    If the sign is defined and '-', we need one position for it
  */

  if (field_length < tmp_uint + (int) (sign_char == '-')) 
  {
    // too big number, change to max or min number
    Field_decimal::overflow(sign_char == '-');
    return 1;
  }
 
  /*
    Tmp_left_pos is the position where the leftmost digit of
    the int_% parts will be written
  */
  tmp_left_pos=pos=to+(uint)(field_length-tmp_uint);
  
  // Write all digits of the int_% parts
  while (int_digits_from != int_digits_end)
    *pos++ = *int_digits_from++ ;

  if (expo_sign_char == '+')
  {    
    while (int_digits_tail_from != frac_digits_from)
      *pos++= *int_digits_tail_from++;
    while (int_digits_added_zeros-- >0)
      *pos++= '0';  
  }
  /*
    Note the position where the rightmost digit of the int_% parts has been
    written (this is to later check if the int_% parts contained nothing,
    meaning an extra 0 is needed).
  */
  tmp_right_pos=pos;

  /*
    Step back to the position of the leftmost digit of the int_% parts,
    to write sign and fill with zeros or blanks or prezeros.
  */
  pos=tmp_left_pos-1;
  if (zerofill)
  {
    left_wall=to-1;
    while (pos > left_wall)			// Fill with zeros
      *pos--='0';
  }
  else
  {
    left_wall=to+(sign_char != 0)-1;
    if (!expo_sign_char)	// If exponent was specified, ignore prezeros
    {
      for (;pos > left_wall && pre_zeros_from !=pre_zeros_end;
	   pre_zeros_from++)
	*pos--= '0';
    }
    if (pos == tmp_right_pos-1)
      *pos--= '0';		// no 0 has ever been written, so write one
    left_wall= to-1;
    if (sign_char && pos != left_wall)
    {
      /* Write sign if possible (it is if sign is '-') */
      *pos--= sign_char;
    }
    while (pos != left_wall)
      *pos--=' ';  //fill with blanks
  }
  
  /*
    Write digits of the frac_% parts ;
    Depending on table->in_use->count_cutted_fields, we may also want
    to know if some non-zero tail of these parts will
    be truncated (for example, 0.002->0.00 will generate a warning,
    while 0.000->0.00 will not)
    (and 0E1000000000 will not, while 1E-1000000000 will)
  */
      
  pos=to+(uint)(field_length-tmp_dec);	// Calculate post to '.'
  right_wall=to+field_length;
  if (pos != right_wall) 
    *pos++='.';

  if (expo_sign_char == '-')
  {
    while (frac_digits_added_zeros-- > 0)
    {
      if (pos == right_wall) 
      {
        if (table->in_use->count_cuted_fields && !is_cuted_fields_incr) 
          break; // Go on below to see if we lose non zero digits
        return 0;
      }
      *pos++='0';
    }
    while (int_digits_end != frac_digits_head_end)
    {
      tmp_char= *int_digits_end++;
      if (pos == right_wall)
      {
        if (tmp_char != '0')			// Losing a non zero digit ?
        {
          if (!is_cuted_fields_incr)
            set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, 
                        WARN_DATA_TRUNCATED, 1);
          return 0;
        }
        continue;
      }
      *pos++= tmp_char;
    }
  }

  for (;frac_digits_from!=frac_digits_end;) 
  {
    tmp_char= *frac_digits_from++;
    if (pos == right_wall)
    {
      if (tmp_char != '0')			// Losing a non zero digit ?
      {
        if (!is_cuted_fields_incr)
        {
          /*
            This is a note, not a warning, as we don't want to abort
            when we cut decimals in strict mode
          */
	  set_warning(MYSQL_ERROR::WARN_LEVEL_NOTE, WARN_DATA_TRUNCATED, 1);
        }
        return 0;
      }
      continue;
    }
    *pos++= tmp_char;
  }
      
  while (pos != right_wall)
   *pos++='0';			// Fill with zeros at right of '.'
  return 0;
}


int Field_decimal::store(double nr)
{
  if (unsigned_flag && nr < 0)
  {
    overflow(1);
    return 1;
  }
  
#ifdef HAVE_FINITE
  if (!finite(nr)) // Handle infinity as special case
  {
    overflow(nr < 0.0);
    return 1;
  }
#endif

  reg4 uint i,length;
  char fyllchar,*to;
  char buff[DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE];

  fyllchar = zerofill ? (char) '0' : (char) ' ';
#ifdef HAVE_SNPRINTF
  buff[sizeof(buff)-1]=0;			// Safety
  snprintf(buff,sizeof(buff)-1, "%.*f",(int) dec,nr);
  length=(uint) strlen(buff);
#else
  length=(uint) my_sprintf(buff,(buff,"%.*f",dec,nr));
#endif

  if (length > field_length)
  {
    overflow(nr < 0.0);
    return 1;
  }
  else
  {
    to=ptr;
    for (i=field_length-length ; i-- > 0 ;)
      *to++ = fyllchar;
    memcpy(to,buff,length);
    return 0;
  }
}


int Field_decimal::store(longlong nr, bool unsigned_val)
{
  char buff[22];
  uint length, int_part;
  char fyllchar, *to;

  if (nr < 0 && unsigned_flag && !unsigned_val)
  {
    overflow(1);
    return 1;
  }
  length= (uint) (longlong10_to_str(nr,buff,unsigned_val ? 10 : -10) - buff);
  int_part= field_length- (dec  ? dec+1 : 0);

  if (length > int_part)
  {
    overflow(!unsigned_val && nr < 0L);		/* purecov: inspected */
    return 1;
  }

  fyllchar = zerofill ? (char) '0' : (char) ' ';
  to= ptr;
  for (uint i=int_part-length ; i-- > 0 ;)
    *to++ = fyllchar;
  memcpy(to,buff,length);
  if (dec)
  {
    to[length]='.';
    bfill(to+length+1,dec,'0');
  }
  return 0;
}


double Field_decimal::val_real(void)
{
  int not_used;
  char *end_not_used;
  return my_strntod(&my_charset_bin, ptr, field_length, &end_not_used,
                    &not_used);
}

longlong Field_decimal::val_int(void)
{
  int not_used;
  if (unsigned_flag)
    return my_strntoull(&my_charset_bin, ptr, field_length, 10, NULL,
			&not_used);
  else
    return my_strntoll(&my_charset_bin, ptr, field_length, 10, NULL,
			&not_used);
}


String *Field_decimal::val_str(String *val_buffer __attribute__((unused)),
			       String *val_ptr)
{
  char *str;
  for (str=ptr ; *str == ' ' ; str++) ;
  uint tmp_length=(uint) (str-ptr);
  val_ptr->set_charset(&my_charset_bin);
  if (field_length < tmp_length)		// Error in data
    val_ptr->length(0);
  else
    val_ptr->set_ascii((const char*) str, field_length-tmp_length);
  return val_ptr;
}

/*
** Should be able to handle at least the following fixed decimal formats:
** 5.00 , -1.0,  05,  -05, +5 with optional pre/end space
*/

int Field_decimal::cmp(const char *a_ptr,const char *b_ptr)
{
  const char *end;
  int swap=0;
  /* First remove prefixes '0', ' ', and '-' */
  for (end=a_ptr+field_length;
       a_ptr != end &&
	 (*a_ptr == *b_ptr ||
	  ((my_isspace(&my_charset_bin,*a_ptr)  || *a_ptr == '+' || 
            *a_ptr == '0') &&
	   (my_isspace(&my_charset_bin,*b_ptr) || *b_ptr == '+' || 
            *b_ptr == '0')));
       a_ptr++,b_ptr++)
  {
    if (*a_ptr == '-')				// If both numbers are negative
      swap= -1 ^ 1;				// Swap result      
  }
  if (a_ptr == end)
    return 0;
  if (*a_ptr == '-')
    return -1;
  if (*b_ptr == '-')
    return 1;

  while (a_ptr != end)
  {
    if (*a_ptr++ != *b_ptr++)
      return swap ^ (a_ptr[-1] < b_ptr[-1] ? -1 : 1); // compare digits
  }
  return 0;
}


void Field_decimal::sort_string(char *to,uint length)
{
  char *str,*end;
  for (str=ptr,end=ptr+length;
       str != end &&
	 ((my_isspace(&my_charset_bin,*str) || *str == '+' ||
	   *str == '0')) ;
       str++)
    *to++=' ';
  if (str == end)
    return;					/* purecov: inspected */

  if (*str == '-')
  {
    *to++=1;					// Smaller than any number
    str++;
    while (str != end)
      if (my_isdigit(&my_charset_bin,*str))
	*to++= (char) ('9' - *str++);
      else
	*to++= *str++;
  }
  else memcpy(to,str,(uint) (end-str));
}


void Field_decimal::sql_type(String &res) const
{
  CHARSET_INFO *cs=res.charset();
  uint tmp=field_length;
  if (!unsigned_flag)
    tmp--;
  if (dec)
    tmp--;
  res.length(cs->cset->snprintf(cs,(char*) res.ptr(),res.alloced_length(),
			  "decimal(%d,%d)",tmp,dec));
  add_zerofill_and_unsigned(res);
}


/****************************************************************************
** Field_new_decimal
****************************************************************************/

Field_new_decimal::Field_new_decimal(char *ptr_arg,
                                     uint32 len_arg, uchar *null_ptr_arg,
                                     uchar null_bit_arg,
                                     enum utype unireg_check_arg,
                                     const char *field_name_arg,
                                     struct st_table *table_arg,
                                     uint8 dec_arg,bool zero_arg,
                                     bool unsigned_arg)
  :Field_num(ptr_arg, len_arg,
             null_ptr_arg, null_bit_arg,
             unireg_check_arg, field_name_arg, table_arg,
             dec_arg, zero_arg, unsigned_arg)
{
  precision= my_decimal_length_to_precision(len_arg, dec_arg, unsigned_arg);
  DBUG_ASSERT((precision <= DECIMAL_MAX_PRECISION) &&
              (dec <= DECIMAL_MAX_SCALE));
  bin_size= my_decimal_get_binary_size(precision, dec);
}


Field_new_decimal::Field_new_decimal(uint32 len_arg,
                                     bool maybe_null,
                                     const char *name,
                                     struct st_table *t_arg,
                                     uint8 dec_arg,
                                     bool unsigned_arg)
  :Field_num((char*) 0, len_arg,
             maybe_null ? (uchar*) "": 0, 0,
             NONE, name, t_arg,
             dec_arg,
             0, unsigned_arg)
{
  precision= my_decimal_length_to_precision(len_arg, dec_arg, unsigned_arg);
  DBUG_ASSERT((precision <= DECIMAL_MAX_PRECISION) &&
              (dec <= DECIMAL_MAX_SCALE));
  bin_size= my_decimal_get_binary_size(precision, dec);
}


void Field_new_decimal::reset(void)
{
  store_value(&decimal_zero);
}


/*
  Generate max/min decimal value in case of overflow.

  SYNOPSIS
    Field_new_decimal::set_value_on_overflow();
    decimal_value     buffer for value
    sign              sign of value which caused overflow
*/

void Field_new_decimal::set_value_on_overflow(my_decimal *decimal_value,
                                              bool sign)
{
  DBUG_ENTER("Field_new_decimal::set_value_on_overflow");
  max_my_decimal(decimal_value, precision, decimals());
  if (sign)
  {
    if (unsigned_flag)
      my_decimal_set_zero(decimal_value);
    else
      decimal_value->sign(TRUE);
  }
  DBUG_VOID_RETURN;
}


/*
  Store decimal value in the binary buffer

  SYNOPSIS
    store_value(const my_decimal *decimal_value)
    decimal_value   my_decimal

  DESCRIPTION
    checks if decimal_value fits into field size.
    if it does, stores the decimal in the buffer using binary format.
    Otherwise sets maximal number that can be stored in the field.

  RETURN
   0 ok
   1 error
*/

bool Field_new_decimal::store_value(const my_decimal *decimal_value)
{
  int error= 0;
  DBUG_ENTER("Field_new_decimal::store_value");
#ifndef DBUG_OFF
  {
    char dbug_buff[DECIMAL_MAX_STR_LENGTH+1];
    DBUG_PRINT("enter", ("value: %s", dbug_decimal_as_string(dbug_buff, decimal_value)));
  }
#endif

  /* check that we do not try to write negative value in unsigned field */
  if (unsigned_flag && decimal_value->sign())
  {
    DBUG_PRINT("info", ("unsigned overflow"));
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
    error= 1;
    decimal_value= &decimal_zero;
  }
#ifndef DBUG_OFF
  {
    char dbug_buff[DECIMAL_MAX_STR_LENGTH+1];
    DBUG_PRINT("info", ("saving with precision %d, scale: %d, value %s",
                        (int)precision, (int)dec,
                        dbug_decimal_as_string(dbug_buff, decimal_value)));
  }
#endif

  if (warn_if_overflow(my_decimal2binary(E_DEC_FATAL_ERROR & ~E_DEC_OVERFLOW,
                                         decimal_value, ptr, precision, dec)))
  {
    my_decimal buff;
    DBUG_PRINT("info", ("overflow"));
    set_value_on_overflow(&buff, decimal_value->sign());
    my_decimal2binary(E_DEC_FATAL_ERROR, &buff, ptr, precision, dec);
    error= 1;
  }
  DBUG_EXECUTE("info", print_decimal_buff(decimal_value, (byte *) ptr, bin_size););
  DBUG_RETURN(error);
}


int Field_new_decimal::store(const char *from, uint length,
                             CHARSET_INFO *charset)
{
  int err;
  my_decimal decimal_value;
  DBUG_ENTER("Field_new_decimal::store(char*)");

  if ((err= str2my_decimal(E_DEC_FATAL_ERROR &
                      ~(E_DEC_OVERFLOW | E_DEC_BAD_NUM),
                      from, length, charset,  &decimal_value)) &&
      table->in_use->abort_on_warning)
  {
    /* Because "from" is not NUL-terminated and we use %s in the ER() */
    String from_as_str;
    from_as_str.copy(from, length, &my_charset_bin);

    push_warning_printf(table->in_use, MYSQL_ERROR::WARN_LEVEL_ERROR,
                        ER_TRUNCATED_WRONG_VALUE_FOR_FIELD,
                        ER(ER_TRUNCATED_WRONG_VALUE_FOR_FIELD),
                        "decimal", from_as_str.c_ptr(), field_name,
                        (ulong) table->in_use->row_count);

    DBUG_RETURN(err);
  }

  switch (err) {
  case E_DEC_TRUNCATED:
    set_warning(MYSQL_ERROR::WARN_LEVEL_NOTE, WARN_DATA_TRUNCATED, 1);
    break;
  case E_DEC_OVERFLOW:
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
    set_value_on_overflow(&decimal_value, decimal_value.sign());
    break;
  case E_DEC_BAD_NUM:
    {
      /* Because "from" is not NUL-terminated and we use %s in the ER() */
      String from_as_str;
      from_as_str.copy(from, length, &my_charset_bin);

    push_warning_printf(table->in_use, MYSQL_ERROR::WARN_LEVEL_WARN,
                        ER_TRUNCATED_WRONG_VALUE_FOR_FIELD,
                        ER(ER_TRUNCATED_WRONG_VALUE_FOR_FIELD),
                          "decimal", from_as_str.c_ptr(), field_name,
                        (ulong) table->in_use->row_count);
    my_decimal_set_zero(&decimal_value);

    break;
    }
  }

#ifndef DBUG_OFF
  char dbug_buff[DECIMAL_MAX_STR_LENGTH+1];
  DBUG_PRINT("enter", ("value: %s",
                       dbug_decimal_as_string(dbug_buff, &decimal_value)));
#endif
  store_value(&decimal_value);
  DBUG_RETURN(err);
}


int Field_new_decimal::store(double nr)
{
  my_decimal decimal_value;
  int err;
  DBUG_ENTER("Field_new_decimal::store(double)");

  err= double2my_decimal(E_DEC_FATAL_ERROR & ~E_DEC_OVERFLOW, nr,
                         &decimal_value);
  /*
    TODO: fix following when double2my_decimal when double2decimal
    will return E_DEC_TRUNCATED always correctly
  */
  if (!err)
  {
    double nr2;
    my_decimal2double(E_DEC_FATAL_ERROR, &decimal_value, &nr2);
    if (nr2 != nr)
      err= E_DEC_TRUNCATED;
  }
  if (err)
  {
    if (check_overflow(err))
      set_value_on_overflow(&decimal_value, decimal_value.sign());
    /* Only issue a warning if store_value doesn't issue an warning */
    table->in_use->got_warning= 0;
  }
  if (store_value(&decimal_value))
    err= 1;
  else if (err && !table->in_use->got_warning)
    err= warn_if_overflow(err);
  DBUG_RETURN(err);
}


int Field_new_decimal::store(longlong nr, bool unsigned_val)
{
  my_decimal decimal_value;
  int err;

  if ((err= int2my_decimal(E_DEC_FATAL_ERROR & ~E_DEC_OVERFLOW,
                           nr, unsigned_val, &decimal_value)))
  {
    if (check_overflow(err))
      set_value_on_overflow(&decimal_value, decimal_value.sign());
    /* Only issue a warning if store_value doesn't issue an warning */
    table->in_use->got_warning= 0;
  }
  if (store_value(&decimal_value))
    err= 1;
  else if (err && !table->in_use->got_warning)
    err= warn_if_overflow(err);
  return err;
}


int Field_new_decimal::store_decimal(const my_decimal *decimal_value)
{
  return store_value(decimal_value);
}


int Field_new_decimal::store_time(TIME *ltime, timestamp_type t_type)
{
    my_decimal decimal_value;
    return store_value(date2my_decimal(ltime, &decimal_value));
}


double Field_new_decimal::val_real(void)
{
  double dbl;
  my_decimal decimal_value;
  my_decimal2double(E_DEC_FATAL_ERROR, val_decimal(&decimal_value), &dbl);
  return dbl;
}


longlong Field_new_decimal::val_int(void)
{
  longlong i;
  my_decimal decimal_value;
  my_decimal2int(E_DEC_FATAL_ERROR, val_decimal(&decimal_value),
                 unsigned_flag, &i);
  return i;
}


my_decimal* Field_new_decimal::val_decimal(my_decimal *decimal_value)
{
  DBUG_ENTER("Field_new_decimal::val_decimal");
  binary2my_decimal(E_DEC_FATAL_ERROR, ptr, decimal_value,
                    precision, dec);
  DBUG_EXECUTE("info", print_decimal_buff(decimal_value, (byte *) ptr,
                                          bin_size););
  DBUG_RETURN(decimal_value);
}


String *Field_new_decimal::val_str(String *val_buffer,
                                   String *val_ptr __attribute__((unused)))
{
  my_decimal decimal_value;
  uint fixed_precision= zerofill ? precision : 0;
  my_decimal2string(E_DEC_FATAL_ERROR, val_decimal(&decimal_value),
                    fixed_precision, dec, '0', val_buffer);
  return val_buffer;
}


int Field_new_decimal::cmp(const char *a,const char*b)
{
  return memcmp(a, b, bin_size);
}


void Field_new_decimal::sort_string(char *buff,
                                    uint length __attribute__((unused)))
{
  memcpy(buff, ptr, bin_size);
}


void Field_new_decimal::sql_type(String &str) const
{
  CHARSET_INFO *cs= str.charset();
  str.length(cs->cset->snprintf(cs, (char*) str.ptr(), str.alloced_length(),
                                "decimal(%d,%d)", precision, (int)dec));
  add_zerofill_and_unsigned(str);
}


/****************************************************************************
** tiny int
****************************************************************************/

int Field_tiny::store(const char *from,uint len,CHARSET_INFO *cs)
{
  char *end;
  int error;

  if (unsigned_flag)
  {
    ulonglong tmp= cs->cset->strntoull10rnd(cs, from, len, 1, &end, &error);
    if (error == MY_ERRNO_ERANGE || tmp > 255)
    {
      set_if_smaller(tmp, 255);
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (table->in_use->count_cuted_fields && check_int(from,len,end,cs))
      error= 1;
    else
      error= 0;
    ptr[0]= (char) tmp;
  }
  else
  {
    longlong tmp= cs->cset->strntoull10rnd(cs, from, len, 0, &end, &error);
    if (tmp < -128)
    {
      tmp= -128;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (tmp >= 128)
    {
      tmp= 127;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (table->in_use->count_cuted_fields && check_int(from,len,end,cs))
      error= 1;
    else
      error= 0;
    ptr[0]= (char) tmp;
  }
  return error;
}


int Field_tiny::store(double nr)
{
  int error= 0;
  nr=rint(nr);
  if (unsigned_flag)
  {
    if (nr < 0.0)
    {
      *ptr=0;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (nr > 255.0)
    {
      *ptr=(char) 255;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      *ptr=(char) nr;
  }
  else
  {
    if (nr < -128.0)
    {
      *ptr= (char) -128;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (nr > 127.0)
    {
      *ptr=127;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      *ptr=(char) (int) nr;
  }
  return error;
}


int Field_tiny::store(longlong nr, bool unsigned_val)
{
  int error= 0;

  if (unsigned_flag)
  {
    if (nr < 0 && !unsigned_val)
    {
      *ptr= 0;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if ((ulonglong) nr > (ulonglong) 255)
    {
      *ptr= (char) 255;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      *ptr=(char) nr;
  }
  else
  {
    if (nr < 0 && unsigned_val)
      nr= 256;                                    // Generate overflow
    if (nr < -128)
    {
      *ptr= (char) -128;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (nr > 127)
    {
      *ptr=127;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      *ptr=(char) nr;
  }
  return error;
}


double Field_tiny::val_real(void)
{
  int tmp= unsigned_flag ? (int) ((uchar*) ptr)[0] :
    (int) ((signed char*) ptr)[0];
  return (double) tmp;
}


longlong Field_tiny::val_int(void)
{
  int tmp= unsigned_flag ? (int) ((uchar*) ptr)[0] :
    (int) ((signed char*) ptr)[0];
  return (longlong) tmp;
}


String *Field_tiny::val_str(String *val_buffer,
			    String *val_ptr __attribute__((unused)))
{
  CHARSET_INFO *cs= &my_charset_bin;
  uint length;
  uint mlength=max(field_length+1,5*cs->mbmaxlen);
  val_buffer->alloc(mlength);
  char *to=(char*) val_buffer->ptr();

  if (unsigned_flag)
    length= (uint) cs->cset->long10_to_str(cs,to,mlength, 10,
					   (long) *((uchar*) ptr));
  else
    length= (uint) cs->cset->long10_to_str(cs,to,mlength,-10,
					   (long) *((signed char*) ptr));
  
  val_buffer->length(length);
  if (zerofill)
    prepend_zeros(val_buffer);
  return val_buffer;
}

bool Field_tiny::send_binary(Protocol *protocol)
{
  return protocol->store_tiny((longlong) (int8) ptr[0]);
}

int Field_tiny::cmp(const char *a_ptr, const char *b_ptr)
{
  signed char a,b;
  a=(signed char) a_ptr[0]; b= (signed char) b_ptr[0];
  if (unsigned_flag)
    return ((uchar) a < (uchar) b) ? -1 : ((uchar) a > (uchar) b) ? 1 : 0;
  return (a < b) ? -1 : (a > b) ? 1 : 0;
}

void Field_tiny::sort_string(char *to,uint length __attribute__((unused)))
{
  if (unsigned_flag)
    *to= *ptr;
  else
    to[0] = (char) ((uchar) ptr[0] ^ (uchar) 128);	/* Revers signbit */
}

void Field_tiny::sql_type(String &res) const
{
  CHARSET_INFO *cs=res.charset();
  res.length(cs->cset->snprintf(cs,(char*) res.ptr(),res.alloced_length(),
			  "tinyint(%d)",(int) field_length));
  add_zerofill_and_unsigned(res);
}

/****************************************************************************
 Field type short int (2 byte)
****************************************************************************/

int Field_short::store(const char *from,uint len,CHARSET_INFO *cs)
{
  char *end;
  int error;

  if (unsigned_flag)
  {
    ulonglong tmp= cs->cset->strntoull10rnd(cs, from, len, 1, &end, &error);
    if (error == MY_ERRNO_ERANGE || tmp > UINT_MAX16)
    {
      set_if_smaller(tmp, UINT_MAX16);
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (table->in_use->count_cuted_fields && check_int(from,len,end,cs))
      error= 1;
    else
      error= 0;
#ifdef WORDS_BIGENDIAN
    if (table->s->db_low_byte_first)
    {
      int2store(ptr,tmp);
    }
    else
#endif
      shortstore(ptr,(short) tmp);
  }
  else
  {
    longlong tmp= cs->cset->strntoull10rnd(cs, from, len, 0, &end, &error);
    if (tmp < INT_MIN16)
    {
      tmp= INT_MIN16;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (tmp > INT_MAX16)
    {
      tmp=INT_MAX16;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (table->in_use->count_cuted_fields && check_int(from,len,end,cs))
      error= 1;
    else
      error= 0;
#ifdef WORDS_BIGENDIAN
    if (table->s->db_low_byte_first)
    {
      int2store(ptr,tmp);
    }
    else
#endif
      shortstore(ptr,(short) tmp);
  }
  return error;
}


int Field_short::store(double nr)
{
  int error= 0;
  int16 res;
  nr=rint(nr);
  if (unsigned_flag)
  {
    if (nr < 0)
    {
      res=0;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (nr > (double) UINT_MAX16)
    {
      res=(int16) UINT_MAX16;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      res=(int16) (uint16) nr;
  }
  else
  {
    if (nr < (double) INT_MIN16)
    {
      res=INT_MIN16;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (nr > (double) INT_MAX16)
    {
      res=INT_MAX16;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      res=(int16) (int) nr;
  }
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    int2store(ptr,res);
  }
  else
#endif
    shortstore(ptr,res);
  return error;
}


int Field_short::store(longlong nr, bool unsigned_val)
{
  int error= 0;
  int16 res;

  if (unsigned_flag)
  {
    if (nr < 0L && !unsigned_val)
    {
      res=0;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if ((ulonglong) nr > (ulonglong) UINT_MAX16)
    {
      res=(int16) UINT_MAX16;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      res=(int16) (uint16) nr;
  }
  else
  {
    if (nr < 0 && unsigned_val)
      nr= UINT_MAX16+1;                         // Generate overflow

    if (nr < INT_MIN16)
    {
      res=INT_MIN16;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (nr > (longlong) INT_MAX16)
    {
      res=INT_MAX16;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      res=(int16) nr;
  }
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    int2store(ptr,res);
  }
  else
#endif
    shortstore(ptr,res);
  return error;
}


double Field_short::val_real(void)
{
  short j;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
    j=sint2korr(ptr);
  else
#endif
    shortget(j,ptr);
  return unsigned_flag ? (double) (unsigned short) j : (double) j;
}

longlong Field_short::val_int(void)
{
  short j;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
    j=sint2korr(ptr);
  else
#endif
    shortget(j,ptr);
  return unsigned_flag ? (longlong) (unsigned short) j : (longlong) j;
}


String *Field_short::val_str(String *val_buffer,
			     String *val_ptr __attribute__((unused)))
{
  CHARSET_INFO *cs= &my_charset_bin;
  uint length;
  uint mlength=max(field_length+1,7*cs->mbmaxlen);
  val_buffer->alloc(mlength);
  char *to=(char*) val_buffer->ptr();
  short j;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
    j=sint2korr(ptr);
  else
#endif
    shortget(j,ptr);

  if (unsigned_flag)
    length=(uint) cs->cset->long10_to_str(cs, to, mlength, 10, 
					  (long) (uint16) j);
  else
    length=(uint) cs->cset->long10_to_str(cs, to, mlength,-10, (long) j);
  val_buffer->length(length);
  if (zerofill)
    prepend_zeros(val_buffer);
  return val_buffer;
}


bool Field_short::send_binary(Protocol *protocol)
{
  return protocol->store_short(Field_short::val_int());
}


int Field_short::cmp(const char *a_ptr, const char *b_ptr)
{
  short a,b;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    a=sint2korr(a_ptr);
    b=sint2korr(b_ptr);
  }
  else
#endif
  {
    shortget(a,a_ptr);
    shortget(b,b_ptr);
  }

  if (unsigned_flag)
    return ((unsigned short) a < (unsigned short) b) ? -1 :
    ((unsigned short) a > (unsigned short) b) ? 1 : 0;
  return (a < b) ? -1 : (a > b) ? 1 : 0;
}

void Field_short::sort_string(char *to,uint length __attribute__((unused)))
{
#ifdef WORDS_BIGENDIAN
  if (!table->s->db_low_byte_first)
  {
    if (unsigned_flag)
      to[0] = ptr[0];
    else
      to[0] = (char) (ptr[0] ^ 128);		/* Revers signbit */
    to[1]   = ptr[1];
  }
  else
#endif
  {
    if (unsigned_flag)
      to[0] = ptr[1];
    else
      to[0] = (char) (ptr[1] ^ 128);		/* Revers signbit */
    to[1]   = ptr[0];
  }
}

void Field_short::sql_type(String &res) const
{
  CHARSET_INFO *cs=res.charset();
  res.length(cs->cset->snprintf(cs,(char*) res.ptr(),res.alloced_length(),
			  "smallint(%d)",(int) field_length));
  add_zerofill_and_unsigned(res);
}


/****************************************************************************
  Field type medium int (3 byte)
****************************************************************************/

int Field_medium::store(const char *from,uint len,CHARSET_INFO *cs)
{
  char *end;
  int error;

  if (unsigned_flag)
  {
    ulonglong tmp= cs->cset->strntoull10rnd(cs, from, len, 1, &end, &error);
    if (error == MY_ERRNO_ERANGE || tmp > UINT_MAX24)
    {
      set_if_smaller(tmp, UINT_MAX24);
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (table->in_use->count_cuted_fields && check_int(from,len,end,cs))
      error= 1;
    else
      error= 0;
    int3store(ptr,tmp);
  }
  else
  {
    longlong tmp= cs->cset->strntoull10rnd(cs, from, len, 0, &end, &error);
    if (tmp < INT_MIN24)
    {
      tmp= INT_MIN24;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (tmp > INT_MAX24)
    {
      tmp=INT_MAX24;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (table->in_use->count_cuted_fields && check_int(from,len,end,cs))
      error= 1;
    else
      error= 0;
    int3store(ptr,tmp);
  }
  return error;
}


int Field_medium::store(double nr)
{
  int error= 0;
  nr=rint(nr);
  if (unsigned_flag)
  {
    if (nr < 0)
    {
      int3store(ptr,0);
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (nr >= (double) (long) (1L << 24))
    {
      uint32 tmp=(uint32) (1L << 24)-1L;
      int3store(ptr,tmp);
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      int3store(ptr,(uint32) nr);
  }
  else
  {
    if (nr < (double) INT_MIN24)
    {
      long tmp=(long) INT_MIN24;
      int3store(ptr,tmp);
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (nr > (double) INT_MAX24)
    {
      long tmp=(long) INT_MAX24;
      int3store(ptr,tmp);
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      int3store(ptr,(long) nr);
  }
  return error;
}


int Field_medium::store(longlong nr, bool unsigned_val)
{
  int error= 0;

  if (unsigned_flag)
  {
    if (nr < 0 && !unsigned_val)
    {
      int3store(ptr,0);
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if ((ulonglong) nr >= (ulonglong) (long) (1L << 24))
    {
      long tmp= (long) (1L << 24)-1L;
      int3store(ptr,tmp);
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      int3store(ptr,(uint32) nr);
  }
  else
  {
    if (nr < 0 && unsigned_val)
      nr= (ulonglong) (long) (1L << 24);        // Generate overflow

    if (nr < (longlong) INT_MIN24)
    {
      long tmp= (long) INT_MIN24;
      int3store(ptr,tmp);
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (nr > (longlong) INT_MAX24)
    {
      long tmp=(long) INT_MAX24;
      int3store(ptr,tmp);
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      int3store(ptr,(long) nr);
  }
  return error;
}


double Field_medium::val_real(void)
{
  long j= unsigned_flag ? (long) uint3korr(ptr) : sint3korr(ptr);
  return (double) j;
}


longlong Field_medium::val_int(void)
{
  long j= unsigned_flag ? (long) uint3korr(ptr) : sint3korr(ptr);
  return (longlong) j;
}


String *Field_medium::val_str(String *val_buffer,
			      String *val_ptr __attribute__((unused)))
{
  CHARSET_INFO *cs= &my_charset_bin;
  uint length;
  uint mlength=max(field_length+1,10*cs->mbmaxlen);
  val_buffer->alloc(mlength);
  char *to=(char*) val_buffer->ptr();
  long j= unsigned_flag ? (long) uint3korr(ptr) : sint3korr(ptr);

  length=(uint) cs->cset->long10_to_str(cs,to,mlength,-10,j);
  val_buffer->length(length);
  if (zerofill)
    prepend_zeros(val_buffer); /* purecov: inspected */
  return val_buffer;
}


bool Field_medium::send_binary(Protocol *protocol)
{
  return protocol->store_long(Field_medium::val_int());
}


int Field_medium::cmp(const char *a_ptr, const char *b_ptr)
{
  long a,b;
  if (unsigned_flag)
  {
    a=uint3korr(a_ptr);
    b=uint3korr(b_ptr);
  }
  else
  {
    a=sint3korr(a_ptr);
    b=sint3korr(b_ptr);
  }
  return (a < b) ? -1 : (a > b) ? 1 : 0;
}

void Field_medium::sort_string(char *to,uint length __attribute__((unused)))
{
  if (unsigned_flag)
    to[0] = ptr[2];
  else
    to[0] = (uchar) (ptr[2] ^ 128);		/* Revers signbit */
  to[1] = ptr[1];
  to[2] = ptr[0];
}


void Field_medium::sql_type(String &res) const
{
  CHARSET_INFO *cs=res.charset();
  res.length(cs->cset->snprintf(cs,(char*) res.ptr(),res.alloced_length(), 
			  "mediumint(%d)",(int) field_length));
  add_zerofill_and_unsigned(res);
}

/****************************************************************************
** long int
****************************************************************************/

/*
  A helper function to check whether the next character
  in the string "s" is MINUS SIGN. 
*/
#ifdef HAVE_CHARSET_ucs2
static bool test_if_minus(CHARSET_INFO *cs,
                          const char *s, const char *e)
{
  my_wc_t wc;
  return cs->cset->mb_wc(cs, &wc, (uchar*) s, (uchar*) e) > 0 && wc == '-';
}
#else
/*
  If not UCS2 support is compiled then it is easier
*/
#define test_if_minus(cs, s, e)  (*s == '-')
#endif


int Field_long::store(const char *from,uint len,CHARSET_INFO *cs)
{
  long store_tmp;
  int error;
  char *end;

  if (unsigned_flag)
  {
    ulonglong tmp= cs->cset->strntoull10rnd(cs, from, len, 1, &end, &error);
    if (error == MY_ERRNO_ERANGE || tmp > (ulonglong) UINT_MAX32)
    {
      set_if_smaller(tmp, (ulonglong) UINT_MAX32);
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (table->in_use->count_cuted_fields && check_int(from,len,end,cs))
      error= 1;
    else
      error= 0;
    store_tmp= (long) tmp;
  }
  else
  {
    longlong tmp= cs->cset->strntoull10rnd(cs, from, len, 0, &end, &error);
    if (tmp < INT_MIN32)
    {
      tmp= INT_MIN32;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (tmp > INT_MAX32)
    {
      tmp=INT_MAX32;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (table->in_use->count_cuted_fields && check_int(from,len,end,cs))
      error= 1;
    else
      error= 0;
    store_tmp= (long) tmp;
  }
    
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    int4store(ptr, store_tmp);
  }
  else
#endif
    longstore(ptr, store_tmp);
  return error;
}


int Field_long::store(double nr)
{
  int error= 0;
  int32 res;
  nr=rint(nr);
  if (unsigned_flag)
  {
    if (nr < 0)
    {
      res=0;
      error= 1;
    }
    else if (nr > (double) UINT_MAX32)
    {
      res= UINT_MAX32;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      res=(int32) (ulong) nr;
  }
  else
  {
    if (nr < (double) INT_MIN32)
    {
      res=(int32) INT_MIN32;
      error= 1;
    }
    else if (nr > (double) INT_MAX32)
    {
      res=(int32) INT_MAX32;
      error= 1;
    }
    else
      res=(int32) (longlong) nr;
  }
  if (error)
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);

#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    int4store(ptr,res);
  }
  else
#endif
    longstore(ptr,res);
  return error;
}


int Field_long::store(longlong nr, bool unsigned_val)
{
  int error= 0;
  int32 res;
  DBUG_ASSERT(table->in_use == current_thd);    // General safety
  
  if (unsigned_flag)
  {
    if (nr < 0 && !unsigned_val)
    {
      res=0;
      error= 1;
    }
    else if ((ulonglong) nr >= (LL(1) << 32))
    {
      res=(int32) (uint32) ~0L;
      error= 1;
    }
    else
      res=(int32) (uint32) nr;
  }
  else
  {
    if (nr < 0 && unsigned_val)
      nr= ((longlong) INT_MAX32) + 1;           // Generate overflow
    if (nr < (longlong) INT_MIN32) 
    {
      res=(int32) INT_MIN32;
      error= 1;
    }
    else if (nr > (longlong) INT_MAX32)
    {
      res=(int32) INT_MAX32;
      error= 1;
    }
    else
      res=(int32) nr;
  }
  if (error)
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);

#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    int4store(ptr,res);
  }
  else
#endif
    longstore(ptr,res);
  return error;
}


double Field_long::val_real(void)
{
  int32 j;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
    j=sint4korr(ptr);
  else
#endif
    longget(j,ptr);
  return unsigned_flag ? (double) (uint32) j : (double) j;
}

longlong Field_long::val_int(void)
{
  int32 j;
  /* See the comment in Field_long::store(long long) */
  DBUG_ASSERT(table->in_use == current_thd);
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
    j=sint4korr(ptr);
  else
#endif
    longget(j,ptr);
  return unsigned_flag ? (longlong) (uint32) j : (longlong) j;
}

String *Field_long::val_str(String *val_buffer,
			    String *val_ptr __attribute__((unused)))
{
  CHARSET_INFO *cs= &my_charset_bin;
  uint length;
  uint mlength=max(field_length+1,12*cs->mbmaxlen);
  val_buffer->alloc(mlength);
  char *to=(char*) val_buffer->ptr();
  int32 j;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
    j=sint4korr(ptr);
  else
#endif
    longget(j,ptr);

  if (unsigned_flag)
    length=cs->cset->long10_to_str(cs,to,mlength, 10,(long) (uint32)j);
  else
    length=cs->cset->long10_to_str(cs,to,mlength,-10,(long) j);
  val_buffer->length(length);
  if (zerofill)
    prepend_zeros(val_buffer);
  return val_buffer;
}


bool Field_long::send_binary(Protocol *protocol)
{
  return protocol->store_long(Field_long::val_int());
}

int Field_long::cmp(const char *a_ptr, const char *b_ptr)
{
  int32 a,b;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    a=sint4korr(a_ptr);
    b=sint4korr(b_ptr);
  }
  else
#endif
  {
    longget(a,a_ptr);
    longget(b,b_ptr);
  }
  if (unsigned_flag)
    return ((uint32) a < (uint32) b) ? -1 : ((uint32) a > (uint32) b) ? 1 : 0;
  return (a < b) ? -1 : (a > b) ? 1 : 0;
}

void Field_long::sort_string(char *to,uint length __attribute__((unused)))
{
#ifdef WORDS_BIGENDIAN
  if (!table->s->db_low_byte_first)
  {
    if (unsigned_flag)
      to[0] = ptr[0];
    else
      to[0] = (char) (ptr[0] ^ 128);		/* Revers signbit */
    to[1]   = ptr[1];
    to[2]   = ptr[2];
    to[3]   = ptr[3];
  }
  else
#endif
  {
    if (unsigned_flag)
      to[0] = ptr[3];
    else
      to[0] = (char) (ptr[3] ^ 128);		/* Revers signbit */
    to[1]   = ptr[2];
    to[2]   = ptr[1];
    to[3]   = ptr[0];
  }
}


void Field_long::sql_type(String &res) const
{
  CHARSET_INFO *cs=res.charset();
  res.length(cs->cset->snprintf(cs,(char*) res.ptr(),res.alloced_length(),
			  "int(%d)",(int) field_length));
  add_zerofill_and_unsigned(res);
}

/****************************************************************************
 Field type longlong int (8 bytes)
****************************************************************************/

int Field_longlong::store(const char *from,uint len,CHARSET_INFO *cs)
{
  int error;
  char *end;
  ulonglong tmp;

  tmp= cs->cset->strntoull10rnd(cs,from,len,unsigned_flag,&end,&error);
  if (error == MY_ERRNO_ERANGE)
  {
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
    error= 1;
  }
  else if (table->in_use->count_cuted_fields && check_int(from,len,end,cs))
    error= 1;
  else
    error= 0;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    int8store(ptr,tmp);
  }
  else
#endif
    longlongstore(ptr,tmp);
  return error;
}


int Field_longlong::store(double nr)
{
  int error= 0;
  longlong res;

  nr= rint(nr);
  if (unsigned_flag)
  {
    if (nr < 0)
    {
      res=0;
      error= 1;
    }
    else if (nr >= (double) ULONGLONG_MAX)
    {
      res= ~(longlong) 0;
      error= 1;
    }
    else
      res=(longlong) (ulonglong) nr;
  }
  else
  {
    if (nr <= (double) LONGLONG_MIN)
    {
      res= LONGLONG_MIN;
      error= (nr < (double) LONGLONG_MIN);
    }
    else if (nr >= (double) (ulonglong) LONGLONG_MAX)
    {
      res= LONGLONG_MAX;
      error= (nr > (double) LONGLONG_MAX);
    }
    else
      res=(longlong) nr;
  }
  if (error)
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);

#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    int8store(ptr,res);
  }
  else
#endif
    longlongstore(ptr,res);
  return error;
}


int Field_longlong::store(longlong nr, bool unsigned_val)
{
  int error= 0;

  if (nr < 0)                                   // Only possible error
  {
    /*
      if field is unsigned and value is signed (< 0) or
      if field is signed and value is unsigned we have an overflow
    */
    if (unsigned_flag != unsigned_val)
    {
      nr= unsigned_flag ? (ulonglong) 0 : (ulonglong) LONGLONG_MAX;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
  }

#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    int8store(ptr,nr);
  }
  else
#endif
    longlongstore(ptr,nr);
  return error;
}


double Field_longlong::val_real(void)
{
  longlong j;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    j=sint8korr(ptr);
  }
  else
#endif
    longlongget(j,ptr);
  /* The following is open coded to avoid a bug in gcc 3.3 */
  if (unsigned_flag)
  {
    ulonglong tmp= (ulonglong) j;
    return ulonglong2double(tmp);
  }
  return (double) j;
}


longlong Field_longlong::val_int(void)
{
  longlong j;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
    j=sint8korr(ptr);
  else
#endif
    longlongget(j,ptr);
  return j;
}


String *Field_longlong::val_str(String *val_buffer,
				String *val_ptr __attribute__((unused)))
{
  CHARSET_INFO *cs= &my_charset_bin;
  uint length;
  uint mlength=max(field_length+1,22*cs->mbmaxlen);
  val_buffer->alloc(mlength);
  char *to=(char*) val_buffer->ptr();
  longlong j;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
    j=sint8korr(ptr);
  else
#endif
    longlongget(j,ptr);

  length=(uint) (cs->cset->longlong10_to_str)(cs,to,mlength,
					unsigned_flag ? 10 : -10, j);
  val_buffer->length(length);
  if (zerofill)
    prepend_zeros(val_buffer);
  return val_buffer;
}


bool Field_longlong::send_binary(Protocol *protocol)
{
  return protocol->store_longlong(Field_longlong::val_int(), unsigned_flag);
}


int Field_longlong::cmp(const char *a_ptr, const char *b_ptr)
{
  longlong a,b;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    a=sint8korr(a_ptr);
    b=sint8korr(b_ptr);
  }
  else
#endif
  {
    longlongget(a,a_ptr);
    longlongget(b,b_ptr);
  }
  if (unsigned_flag)
    return ((ulonglong) a < (ulonglong) b) ? -1 :
    ((ulonglong) a > (ulonglong) b) ? 1 : 0;
  return (a < b) ? -1 : (a > b) ? 1 : 0;
}

void Field_longlong::sort_string(char *to,uint length __attribute__((unused)))
{
#ifdef WORDS_BIGENDIAN
  if (!table->s->db_low_byte_first)
  {
    if (unsigned_flag)
      to[0] = ptr[0];
    else
      to[0] = (char) (ptr[0] ^ 128);		/* Revers signbit */
    to[1]   = ptr[1];
    to[2]   = ptr[2];
    to[3]   = ptr[3];
    to[4]   = ptr[4];
    to[5]   = ptr[5];
    to[6]   = ptr[6];
    to[7]   = ptr[7];
  }
  else
#endif
  {
    if (unsigned_flag)
      to[0] = ptr[7];
    else
      to[0] = (char) (ptr[7] ^ 128);		/* Revers signbit */
    to[1]   = ptr[6];
    to[2]   = ptr[5];
    to[3]   = ptr[4];
    to[4]   = ptr[3];
    to[5]   = ptr[2];
    to[6]   = ptr[1];
    to[7]   = ptr[0];
  }
}


void Field_longlong::sql_type(String &res) const
{
  CHARSET_INFO *cs=res.charset();
  res.length(cs->cset->snprintf(cs,(char*) res.ptr(),res.alloced_length(),
			  "bigint(%d)",(int) field_length));
  add_zerofill_and_unsigned(res);
}


/****************************************************************************
  single precision float
****************************************************************************/

int Field_float::store(const char *from,uint len,CHARSET_INFO *cs)
{
  int error;
  char *end;
  double nr= my_strntod(cs,(char*) from,len,&end,&error);
  if (error || (!len || (uint) (end-from) != len &&
                table->in_use->count_cuted_fields))
  {
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                (error ? ER_WARN_DATA_OUT_OF_RANGE : WARN_DATA_TRUNCATED), 1);
    error= error ? 1 : 2;
  }
  Field_float::store(nr);
  return error;
}


int Field_float::store(double nr)
{
  float j;
  int error= 0;

  if (isnan(nr))
  {
    j= 0;
    set_null();
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
    error= 1;
  }
  else if (unsigned_flag && nr < 0)
  {
    j= 0;
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
    error= 1;
  }
  else
  {
    double max_value;
    if (dec >= NOT_FIXED_DEC)
    {
      max_value= FLT_MAX;
    }
    else
    {
      uint tmp=min(field_length,array_elements(log_10)-1);
      max_value= (log_10[tmp]-1)/log_10[dec];
      /*
	The following comparison is needed to not get an overflow if nr
	is close to FLT_MAX
      */
      if (fabs(nr) < FLT_MAX/10.0e+32)
	nr= floor(nr*log_10[dec]+0.5)/log_10[dec];
    }
    if (nr < -max_value)
    {
      j= (float)-max_value;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (nr > max_value)
    {
      j= (float)max_value;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else
      j= (float) nr;
  }
  
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    float4store(ptr,j);
  }
  else
#endif
    memcpy_fixed(ptr,(byte*) &j,sizeof(j));
  return error;
}


int Field_float::store(longlong nr, bool unsigned_val)
{
  return store(unsigned_val ? ulonglong2double((ulonglong) nr) : (double) nr);
}


double Field_float::val_real(void)
{
  float j;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    float4get(j,ptr);
  }
  else
#endif
    memcpy_fixed((byte*) &j,ptr,sizeof(j));
  return ((double) j);
}

longlong Field_float::val_int(void)
{
  float j;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    float4get(j,ptr);
  }
  else
#endif
    memcpy_fixed((byte*) &j,ptr,sizeof(j));
  return (longlong) rint(j);
}


String *Field_float::val_str(String *val_buffer,
			     String *val_ptr __attribute__((unused)))
{
  float nr;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    float4get(nr,ptr);
  }
  else
#endif
    memcpy_fixed((byte*) &nr,ptr,sizeof(nr));

  uint to_length=max(field_length,70);
  val_buffer->alloc(to_length);
  char *to=(char*) val_buffer->ptr();

  if (dec >= NOT_FIXED_DEC)
  {
    sprintf(to,"%-*.*g",(int) field_length,FLT_DIG,nr);
    to=strcend(to,' ');
    *to=0;
  }
  else
  {
#ifdef HAVE_FCONVERT
    char buff[70],*pos=buff;
    int decpt,sign,tmp_dec=dec;

    VOID(sfconvert(&nr,tmp_dec,&decpt,&sign,buff));
    if (sign)
    {
      *to++='-';
    }
    if (decpt < 0)
    {					/* val_buffer is < 0 */
      *to++='0';
      if (!tmp_dec)
	goto end;
      *to++='.';
      if (-decpt > tmp_dec)
	decpt= - (int) tmp_dec;
      tmp_dec=(uint) ((int) tmp_dec+decpt);
      while (decpt++ < 0)
	*to++='0';
    }
    else if (decpt == 0)
    {
      *to++= '0';
      if (!tmp_dec)
	goto end;
      *to++='.';
    }
    else
    {
      while (decpt-- > 0)
	*to++= *pos++;
      if (!tmp_dec)
	goto end;
      *to++='.';
    }
    while (tmp_dec--)
      *to++= *pos++;
#else
#ifdef HAVE_SNPRINTF
    to[to_length-1]=0;			// Safety
    snprintf(to,to_length-1,"%.*f",dec,nr);
    to=strend(to);
#else
    to+= my_sprintf(to,(to,"%.*f",dec,nr));
#endif
#endif
  }
#ifdef HAVE_FCONVERT
 end:
#endif
  val_buffer->length((uint) (to-val_buffer->ptr()));
  if (zerofill)
    prepend_zeros(val_buffer);
  return val_buffer;
}


int Field_float::cmp(const char *a_ptr, const char *b_ptr)
{
  float a,b;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    float4get(a,a_ptr);
    float4get(b,b_ptr);
  }
  else
#endif
  {
    memcpy_fixed(&a,a_ptr,sizeof(float));
    memcpy_fixed(&b,b_ptr,sizeof(float));
  }
  return (a < b) ? -1 : (a > b) ? 1 : 0;
}

#define FLT_EXP_DIG (sizeof(float)*8-FLT_MANT_DIG)

void Field_float::sort_string(char *to,uint length __attribute__((unused)))
{
  float nr;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    float4get(nr,ptr);
  }
  else
#endif
    memcpy_fixed(&nr,ptr,sizeof(float));

  uchar *tmp= (uchar*) to;
  if (nr == (float) 0.0)
  {						/* Change to zero string */
    tmp[0]=(uchar) 128;
    bzero((char*) tmp+1,sizeof(nr)-1);
  }
  else
  {
#ifdef WORDS_BIGENDIAN
    memcpy_fixed(tmp,&nr,sizeof(nr));
#else
    tmp[0]= ptr[3]; tmp[1]=ptr[2]; tmp[2]= ptr[1]; tmp[3]=ptr[0];
#endif
    if (tmp[0] & 128)				/* Negative */
    {						/* make complement */
      uint i;
      for (i=0 ; i < sizeof(nr); i++)
	tmp[i]= (uchar) (tmp[i] ^ (uchar) 255);
    }
    else
    {
      ushort exp_part=(((ushort) tmp[0] << 8) | (ushort) tmp[1] |
		       (ushort) 32768);
      exp_part+= (ushort) 1 << (16-1-FLT_EXP_DIG);
      tmp[0]= (uchar) (exp_part >> 8);
      tmp[1]= (uchar) exp_part;
    }
  }
}


bool Field_float::send_binary(Protocol *protocol)
{
  return protocol->store((float) Field_float::val_real(), dec, (String*) 0);
}


void Field_float::sql_type(String &res) const
{
  if (dec == NOT_FIXED_DEC)
  {
    res.set_ascii(STRING_WITH_LEN("float"));
  }
  else
  {
    CHARSET_INFO *cs= res.charset();
    res.length(cs->cset->snprintf(cs,(char*) res.ptr(),res.alloced_length(),
			    "float(%d,%d)",(int) field_length,dec));
  }
  add_zerofill_and_unsigned(res);
}


/****************************************************************************
  double precision floating point numbers
****************************************************************************/

int Field_double::store(const char *from,uint len,CHARSET_INFO *cs)
{
  int error;
  char *end;
  double nr= my_strntod(cs,(char*) from, len, &end, &error);
  if (error || (!len || (uint) (end-from) != len &&
                table->in_use->count_cuted_fields))
  {
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                (error ? ER_WARN_DATA_OUT_OF_RANGE : WARN_DATA_TRUNCATED), 1);
    error= error ? 1 : 2;
  }
  Field_double::store(nr);
  return error;
}


int Field_double::store(double nr)
{
  int error= 0;

  if (isnan(nr))
  {
    nr= 0;
    set_null();
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
    error= 1;
  }
  else if (unsigned_flag && nr < 0)
  {
    nr= 0;
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
    error= 1;
  }
  else 
  {
    double max_value;
    if (dec >= NOT_FIXED_DEC)
    {
      max_value= DBL_MAX;
    }
    else
    {
      uint tmp=min(field_length,array_elements(log_10)-1);
      max_value= (log_10[tmp]-1)/log_10[dec];
      if (fabs(nr) < DBL_MAX/10.0e+32)
	nr= floor(nr*log_10[dec]+0.5)/log_10[dec];
    }
    if (nr < -max_value)
    {
      nr= -max_value;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
    else if (nr > max_value)
    {
      nr= max_value;
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
      error= 1;
    }
  }

#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    float8store(ptr,nr);
  }
  else
#endif
    doublestore(ptr,nr);
  return error;
}


int Field_double::store(longlong nr, bool unsigned_val)
{
  return store(unsigned_val ? ulonglong2double((ulonglong) nr) : (double) nr);
}


int Field_real::store_decimal(const my_decimal *dm)
{
  double dbl;
  my_decimal2double(E_DEC_FATAL_ERROR, dm, &dbl);
  return store(dbl);
}

double Field_double::val_real(void)
{
  double j;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    float8get(j,ptr);
  }
  else
#endif
    doubleget(j,ptr);
  return j;
}

longlong Field_double::val_int(void)
{
  double j;
  longlong res;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    float8get(j,ptr);
  }
  else
#endif
    doubleget(j,ptr);
  /* Check whether we fit into longlong range */
  if (j <= (double) LONGLONG_MIN)
  {
    res= (longlong) LONGLONG_MIN;
    goto warn;
  }
  if (j >= (double) (ulonglong) LONGLONG_MAX)
  {
    res= (longlong) LONGLONG_MAX;
    goto warn;
  }
  return (longlong) rint(j);

warn:
  {
    char buf[DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE];
    String tmp(buf, sizeof(buf), &my_charset_latin1), *str;
    str= val_str(&tmp, 0);
    push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                        ER_TRUNCATED_WRONG_VALUE,
                        ER(ER_TRUNCATED_WRONG_VALUE), "INTEGER",
                        str->c_ptr());
  }
  return res;
}


my_decimal *Field_real::val_decimal(my_decimal *decimal_value)
{
  double2my_decimal(E_DEC_FATAL_ERROR, val_real(), decimal_value);
  return decimal_value;
}


String *Field_double::val_str(String *val_buffer,
			      String *val_ptr __attribute__((unused)))
{
  double nr;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    float8get(nr,ptr);
  }
  else
#endif
    doubleget(nr,ptr);

  uint to_length=max(field_length, DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE);
  val_buffer->alloc(to_length);
  char *to=(char*) val_buffer->ptr();

  if (dec >= NOT_FIXED_DEC)
  {
    sprintf(to,"%-*.*g",(int) field_length,DBL_DIG,nr);
    to=strcend(to,' ');
  }
  else
  {
#ifdef HAVE_FCONVERT
    char buff[DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE];
    char *pos= buff;
    int decpt,sign,tmp_dec=dec;

    VOID(fconvert(nr,tmp_dec,&decpt,&sign,buff));
    if (sign)
    {
      *to++='-';
    }
    if (decpt < 0)
    {					/* val_buffer is < 0 */
      *to++='0';
      if (!tmp_dec)
	goto end;
      *to++='.';
      if (-decpt > tmp_dec)
	decpt= - (int) tmp_dec;
      tmp_dec=(uint) ((int) tmp_dec+decpt);
      while (decpt++ < 0)
	*to++='0';
    }
    else if (decpt == 0)
    {
      *to++= '0';
      if (!tmp_dec)
	goto end;
      *to++='.';
    }
    else
    {
      while (decpt-- > 0)
	*to++= *pos++;
      if (!tmp_dec)
	goto end;
      *to++='.';
    }
    while (tmp_dec--)
      *to++= *pos++;
#else
#ifdef HAVE_SNPRINTF
    to[to_length-1]=0;			// Safety
    snprintf(to,to_length-1,"%.*f",dec,nr);
    to=strend(to);
#else
    to+= my_sprintf(to,(to,"%.*f",dec,nr));
#endif
#endif
  }
#ifdef HAVE_FCONVERT
 end:
#endif

  val_buffer->length((uint) (to-val_buffer->ptr()));
  if (zerofill)
    prepend_zeros(val_buffer);
  return val_buffer;
}

bool Field_double::send_binary(Protocol *protocol)
{
  return protocol->store((double) Field_double::val_real(), dec, (String*) 0);
}


int Field_double::cmp(const char *a_ptr, const char *b_ptr)
{
  double a,b;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    float8get(a,a_ptr);
    float8get(b,b_ptr);
  }
  else
#endif
  {
    doubleget(a, a_ptr);
    doubleget(b, b_ptr);
  }
  return (a < b) ? -1 : (a > b) ? 1 : 0;
}


#define DBL_EXP_DIG (sizeof(double)*8-DBL_MANT_DIG)

/* The following should work for IEEE */

void Field_double::sort_string(char *to,uint length __attribute__((unused)))
{
  double nr;
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    float8get(nr,ptr);
  }
  else
#endif
    doubleget(nr,ptr);
  change_double_for_sort(nr, (byte*) to);
}


void Field_double::sql_type(String &res) const
{
  CHARSET_INFO *cs=res.charset();
  if (dec == NOT_FIXED_DEC)
  {
    res.set_ascii(STRING_WITH_LEN("double"));
  }
  else
  {
    res.length(cs->cset->snprintf(cs,(char*) res.ptr(),res.alloced_length(),
			    "double(%d,%d)",(int) field_length,dec));
  }
  add_zerofill_and_unsigned(res);
}


/*
  TIMESTAMP type.
  Holds datetime values in range from 1970-01-01 00:00:01 UTC to 
  2038-01-01 00:00:00 UTC stored as number of seconds since Unix 
  Epoch in UTC.
  
  Up to one of timestamps columns in the table can be automatically 
  set on row update and/or have NOW() as default value.
  TABLE::timestamp_field points to Field object for such timestamp with 
  auto-set-on-update. TABLE::time_stamp holds offset in record + 1 for this
  field, and is used by handler code which performs updates required.
  
  Actually SQL-99 says that we should allow niladic functions (like NOW())
  as defaults for any field. Current limitations (only NOW() and only 
  for one TIMESTAMP field) are because of restricted binary .frm format 
  and should go away in the future.
  
  Also because of this limitation of binary .frm format we use 5 different
  unireg_check values with TIMESTAMP field to distinguish various cases of
  DEFAULT or ON UPDATE values. These values are:
  
  TIMESTAMP_OLD_FIELD - old timestamp, if there was not any fields with
    auto-set-on-update (or now() as default) in this table before, then this 
    field has NOW() as default and is updated when row changes, else it is 
    field which has 0 as default value and is not automatically updated.
  TIMESTAMP_DN_FIELD - field with NOW() as default but not set on update
    automatically (TIMESTAMP DEFAULT NOW())
  TIMESTAMP_UN_FIELD - field which is set on update automatically but has not 
    NOW() as default (but it may has 0 or some other const timestamp as 
    default) (TIMESTAMP ON UPDATE NOW()).
  TIMESTAMP_DNUN_FIELD - field which has now() as default and is auto-set on 
    update. (TIMESTAMP DEFAULT NOW() ON UPDATE NOW())
  NONE - field which is not auto-set on update with some other than NOW() 
    default value (TIMESTAMP DEFAULT 0).

  Note that TIMESTAMP_OLD_FIELD's are never created explicitly now, they are 
  left only for preserving ability to read old tables. Such fields replaced 
  with their newer analogs in CREATE TABLE and in SHOW CREATE TABLE. This is 
  because we want to prefer NONE unireg_check before TIMESTAMP_OLD_FIELD for 
  "TIMESTAMP DEFAULT 'Const'" field. (Old timestamps allowed such 
  specification too but ignored default value for first timestamp, which of 
  course is non-standard.) In most cases user won't notice any change, only
  exception is different behavior of old/new timestamps during ALTER TABLE.
 */

Field_timestamp::Field_timestamp(char *ptr_arg, uint32 len_arg,
                                 uchar *null_ptr_arg, uchar null_bit_arg,
				 enum utype unireg_check_arg,
				 const char *field_name_arg,
				 struct st_table *table_arg,
				 CHARSET_INFO *cs)
  :Field_str(ptr_arg, 19, null_ptr_arg, null_bit_arg,
	     unireg_check_arg, field_name_arg, table_arg, cs)
{
  /* For 4.0 MYD and 4.0 InnoDB compatibility */
  flags|= ZEROFILL_FLAG | UNSIGNED_FLAG;
  if (table && !table->timestamp_field && 
      unireg_check != NONE)
  {
    /* This timestamp has auto-update */
    table->timestamp_field= this;
    flags|=TIMESTAMP_FLAG;
  }
}


Field_timestamp::Field_timestamp(bool maybe_null_arg,
                                 const char *field_name_arg,
                                 struct st_table *table_arg, CHARSET_INFO *cs)
  :Field_str((char*) 0, 19, maybe_null_arg ? (uchar*) "": 0, 0,
	     NONE, field_name_arg, table_arg, cs)
{
  /* For 4.0 MYD and 4.0 InnoDB compatibility */
  flags|= ZEROFILL_FLAG | UNSIGNED_FLAG;
  if (table && !table->timestamp_field &&
      unireg_check != NONE)
  {
    /* This timestamp has auto-update */
    table->timestamp_field= this;
    flags|=TIMESTAMP_FLAG;
  }
}


/*
  Get auto-set type for TIMESTAMP field.

  SYNOPSIS
    get_auto_set_type()

  DESCRIPTION
    Returns value indicating during which operations this TIMESTAMP field
    should be auto-set to current timestamp.
*/
timestamp_auto_set_type Field_timestamp::get_auto_set_type() const
{
  switch (unireg_check)
  {
  case TIMESTAMP_DN_FIELD:
    return TIMESTAMP_AUTO_SET_ON_INSERT;
  case TIMESTAMP_UN_FIELD:
    return TIMESTAMP_AUTO_SET_ON_UPDATE;
  case TIMESTAMP_OLD_FIELD:
    /*
      Although we can have several such columns in legacy tables this
      function should be called only for first of them (i.e. the one
      having auto-set property).
    */
    DBUG_ASSERT(table->timestamp_field == this);
    /* Fall-through */
  case TIMESTAMP_DNUN_FIELD:
    return TIMESTAMP_AUTO_SET_ON_BOTH;
  default:
    /*
      Normally this function should not be called for TIMESTAMPs without
      auto-set property.
    */
    DBUG_ASSERT(0);
    return TIMESTAMP_NO_AUTO_SET;
  }
}


int Field_timestamp::store(const char *from,uint len,CHARSET_INFO *cs)
{
  TIME l_time;
  my_time_t tmp= 0;
  int error;
  bool have_smth_to_conv;
  my_bool in_dst_time_gap;
  THD *thd= table ? table->in_use : current_thd;

  /* We don't want to store invalid or fuzzy datetime values in TIMESTAMP */
  have_smth_to_conv= (str_to_datetime(from, len, &l_time,
                                      (thd->variables.sql_mode &
                                       MODE_NO_ZERO_DATE) |
                                      MODE_NO_ZERO_IN_DATE, &error) >
                      MYSQL_TIMESTAMP_ERROR);

  if (error || !have_smth_to_conv)
  {
    error= 1;
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED,
                         from, len, MYSQL_TIMESTAMP_DATETIME, 1);
  }

  /* Only convert a correct date (not a zero date) */
  if (have_smth_to_conv && l_time.month)
  {
    if (!(tmp= TIME_to_timestamp(thd, &l_time, &in_dst_time_gap)))
    {
      set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                           ER_WARN_DATA_OUT_OF_RANGE,
                           from, len, MYSQL_TIMESTAMP_DATETIME, !error);
      error= 1;
    }
    else if (in_dst_time_gap)
    {
      set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                           ER_WARN_INVALID_TIMESTAMP,
                           from, len, MYSQL_TIMESTAMP_DATETIME, !error);
      error= 1;
    }
  }

#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
  {
    int4store(ptr,tmp);
  }
  else
#endif
    longstore(ptr,tmp);
  return error;
}


int Field_timestamp::store(double nr)
{
  int error= 0;
  if (nr < 0 || nr > 99991231235959.0)
  {
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                         ER_WARN_DATA_OUT_OF_RANGE,
                         nr, MYSQL_TIMESTAMP_DATETIME);
    nr= 0;					// Avoid overflow on buff
    error= 1;
  }
  error|= Field_timestamp::store((longlong) rint(nr), FALSE);
  return error;
}


int Field_timestamp::store(longlong nr, bool unsigned_val)
{
  TIME l_time;
  my_time_t timestamp= 0;
  int error;
  my_bool in_dst_time_gap;
  THD *thd= table ? table->in_use : current_thd;

  /* We don't want to store invalid or fuzzy datetime values in TIMESTAMP */
  longlong tmp= number_to_datetime(nr, &l_time, (thd->variables.sql_mode &
                                                 MODE_NO_ZERO_DATE) |
                                   MODE_NO_ZERO_IN_DATE, &error);
  if (tmp == LL(-1))
  {
    error= 2;
  }

  if (!error && tmp)
  {
    if (!(timestamp= TIME_to_timestamp(thd, &l_time, &in_dst_time_gap)))
    {
      set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                           ER_WARN_DATA_OUT_OF_RANGE,
                           nr, MYSQL_TIMESTAMP_DATETIME, 1);
      error= 1;
    }
    if (in_dst_time_gap)
    {
      set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                           ER_WARN_INVALID_TIMESTAMP,
                           nr, MYSQL_TIMESTAMP_DATETIME, 1);
      error= 1;
    }
  } else if (error)
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                         WARN_DATA_TRUNCATED,
                         nr, MYSQL_TIMESTAMP_DATETIME, 1);

#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
  {
    int4store(ptr,timestamp);
  }
  else
#endif
    longstore(ptr,(uint32) timestamp);

  return error;
}


double Field_timestamp::val_real(void)
{
  return (double) Field_timestamp::val_int();
}

longlong Field_timestamp::val_int(void)
{
  uint32 temp;
  TIME time_tmp;
  THD  *thd= table ? table->in_use : current_thd;

#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
    temp=uint4korr(ptr);
  else
#endif
    longget(temp,ptr);

  if (temp == 0L)				// No time
    return(0);					/* purecov: inspected */
  
  thd->variables.time_zone->gmt_sec_to_TIME(&time_tmp, (my_time_t)temp);
  thd->time_zone_used= 1;
  
  return time_tmp.year * LL(10000000000) + time_tmp.month * LL(100000000) +
         time_tmp.day * 1000000L + time_tmp.hour * 10000L +
         time_tmp.minute * 100 + time_tmp.second;
}


String *Field_timestamp::val_str(String *val_buffer, String *val_ptr)
{
  uint32 temp, temp2;
  TIME time_tmp;
  THD *thd= table ? table->in_use : current_thd;
  char *to;

  val_buffer->alloc(field_length+1);
  to= (char*) val_buffer->ptr();
  val_buffer->length(field_length);

#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
    temp=uint4korr(ptr);
  else
#endif
    longget(temp,ptr);

  if (temp == 0L)
  {				      /* Zero time is "000000" */
    val_ptr->set(STRING_WITH_LEN("0000-00-00 00:00:00"), &my_charset_bin);
    return val_ptr;
  }
  val_buffer->set_charset(&my_charset_bin);	// Safety
  
  thd->variables.time_zone->gmt_sec_to_TIME(&time_tmp,(my_time_t)temp);
  thd->time_zone_used= 1;

  temp= time_tmp.year % 100;
  if (temp < YY_PART_YEAR - 1)
  {
    *to++= '2';
    *to++= '0';
  }
  else
  {
    *to++= '1';
    *to++= '9';
  }
  temp2=temp/10; temp=temp-temp2*10;
  *to++= (char) ('0'+(char) (temp2));
  *to++= (char) ('0'+(char) (temp));
  *to++= '-';
  temp=time_tmp.month;
  temp2=temp/10; temp=temp-temp2*10;
  *to++= (char) ('0'+(char) (temp2));
  *to++= (char) ('0'+(char) (temp));
  *to++= '-';
  temp=time_tmp.day;
  temp2=temp/10; temp=temp-temp2*10;
  *to++= (char) ('0'+(char) (temp2));
  *to++= (char) ('0'+(char) (temp));
  *to++= ' ';
  temp=time_tmp.hour;
  temp2=temp/10; temp=temp-temp2*10;
  *to++= (char) ('0'+(char) (temp2));
  *to++= (char) ('0'+(char) (temp));
  *to++= ':';
  temp=time_tmp.minute;
  temp2=temp/10; temp=temp-temp2*10;
  *to++= (char) ('0'+(char) (temp2));
  *to++= (char) ('0'+(char) (temp));
  *to++= ':';
  temp=time_tmp.second;
  temp2=temp/10; temp=temp-temp2*10;
  *to++= (char) ('0'+(char) (temp2));
  *to++= (char) ('0'+(char) (temp));
  *to= 0;
  return val_buffer;
}


bool Field_timestamp::get_date(TIME *ltime, uint fuzzydate)
{
  long temp;
  THD *thd= table ? table->in_use : current_thd;
#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
    temp=uint4korr(ptr);
  else
#endif
    longget(temp,ptr);
  if (temp == 0L)
  {				      /* Zero time is "000000" */
    if (fuzzydate & TIME_NO_ZERO_DATE)
      return 1;
    bzero((char*) ltime,sizeof(*ltime));
  }
  else
  {
    thd->variables.time_zone->gmt_sec_to_TIME(ltime, (my_time_t)temp);
    thd->time_zone_used= 1;
  }
  return 0;
}

bool Field_timestamp::get_time(TIME *ltime)
{
  return Field_timestamp::get_date(ltime,0);
}


bool Field_timestamp::send_binary(Protocol *protocol)
{
  TIME tm;
  Field_timestamp::get_date(&tm, 0);
  return protocol->store(&tm);
}


int Field_timestamp::cmp(const char *a_ptr, const char *b_ptr)
{
  int32 a,b;
#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
  {
    a=sint4korr(a_ptr);
    b=sint4korr(b_ptr);
  }
  else
#endif
  {
  longget(a,a_ptr);
  longget(b,b_ptr);
  }
  return ((uint32) a < (uint32) b) ? -1 : ((uint32) a > (uint32) b) ? 1 : 0;
}


void Field_timestamp::sort_string(char *to,uint length __attribute__((unused)))
{
#ifdef WORDS_BIGENDIAN
  if (!table || !table->s->db_low_byte_first)
  {
    to[0] = ptr[0];
    to[1] = ptr[1];
    to[2] = ptr[2];
    to[3] = ptr[3];
  }
  else
#endif
  {
    to[0] = ptr[3];
    to[1] = ptr[2];
    to[2] = ptr[1];
    to[3] = ptr[0];
  }
}


void Field_timestamp::sql_type(String &res) const
{
  res.set_ascii(STRING_WITH_LEN("timestamp"));
}


void Field_timestamp::set_time()
{
  THD *thd= table ? table->in_use : current_thd;
  long tmp= (long) thd->query_start();
  set_notnull();
#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
  {
    int4store(ptr,tmp);
  }
  else
#endif
    longstore(ptr,tmp);
}

/****************************************************************************
** time type
** In string context: HH:MM:SS
** In number context: HHMMSS
** Stored as a 3 byte unsigned int
****************************************************************************/

int Field_time::store(const char *from,uint len,CHARSET_INFO *cs)
{
  TIME ltime;
  long tmp;
  int error;

  if (str_to_time(from, len, &ltime, &error))
  {
    tmp=0L;
    error= 2;
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED,
                         from, len, MYSQL_TIMESTAMP_TIME, 1);
  }
  else
  {
    if (error)
      set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, 
                           WARN_DATA_TRUNCATED,
                           from, len, MYSQL_TIMESTAMP_TIME, 1);

    if (ltime.month)
      ltime.day=0;
    tmp=(ltime.day*24L+ltime.hour)*10000L+(ltime.minute*100+ltime.second);
    if (tmp > 8385959)
    {
      tmp=8385959;
      set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, 
                           ER_WARN_DATA_OUT_OF_RANGE,
                           from, len, MYSQL_TIMESTAMP_TIME, !error);
      error= 1;
    }
    if (error > 1)
      error= 2;
  }
  
  if (ltime.neg)
    tmp= -tmp;
  error |= Field_time::store((longlong) tmp, FALSE);
  return error;
}


int Field_time::store_time(TIME *ltime, timestamp_type type)
{
  long tmp= ((ltime->month ? 0 : ltime->day * 24L) + ltime->hour) * 10000L +
            (ltime->minute * 100 + ltime->second);
  if (ltime->neg)
    tmp= -tmp;
  return Field_time::store((longlong) tmp);
}


int Field_time::store(double nr)
{
  long tmp;
  int error= 0;
  if (nr > 8385959.0)
  {
    tmp=8385959L;
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, 
                         ER_WARN_DATA_OUT_OF_RANGE, nr, MYSQL_TIMESTAMP_TIME);
    error= 1;
  }
  else if (nr < -8385959.0)
  {
    tmp= -8385959L;
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, 
                         ER_WARN_DATA_OUT_OF_RANGE, nr, MYSQL_TIMESTAMP_TIME);
    error= 1;
  }
  else
  {
    tmp=(long) floor(fabs(nr));			// Remove fractions
    if (nr < 0)
      tmp= -tmp;
    if (tmp % 100 > 59 || tmp/100 % 100 > 59)
    {
      tmp=0;
      set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, 
                           ER_WARN_DATA_OUT_OF_RANGE, nr,
                           MYSQL_TIMESTAMP_TIME);
      error= 1;
    }
  }
  int3store(ptr,tmp);
  return error;
}


int Field_time::store(longlong nr, bool unsigned_val)
{
  long tmp;
  int error= 0;
  if (nr < (longlong) -8385959L && !unsigned_val)
  {
    tmp= -8385959L;
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, 
                         ER_WARN_DATA_OUT_OF_RANGE, nr,
                         MYSQL_TIMESTAMP_TIME, 1);
    error= 1;
  }
  else if (nr > (longlong) 8385959 || nr < 0 && unsigned_val)
  {
    tmp=8385959L;
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, 
                         ER_WARN_DATA_OUT_OF_RANGE, nr,
                         MYSQL_TIMESTAMP_TIME, 1);
    error= 1;
  }
  else
  {
    tmp=(long) nr;
    if (tmp % 100 > 59 || tmp/100 % 100 > 59)
    {
      tmp=0;
      set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, 
                           ER_WARN_DATA_OUT_OF_RANGE, nr,
                           MYSQL_TIMESTAMP_TIME, 1);
      error= 1;
    }
  }
  int3store(ptr,tmp);
  return error;
}


double Field_time::val_real(void)
{
  uint32 j= (uint32) uint3korr(ptr);
  return (double) j;
}

longlong Field_time::val_int(void)
{
  return (longlong) sint3korr(ptr);
}


/*
  This function is multi-byte safe as the result string is always of type
  my_charset_bin
*/

String *Field_time::val_str(String *val_buffer,
			    String *val_ptr __attribute__((unused)))
{
  TIME ltime;
  val_buffer->alloc(19);
  long tmp=(long) sint3korr(ptr);
  ltime.neg= 0;
  if (tmp < 0)
  {
    tmp= -tmp;
    ltime.neg= 1;
  }
  ltime.day= (uint) 0;
  ltime.hour= (uint) (tmp/10000);
  ltime.minute= (uint) (tmp/100 % 100);
  ltime.second= (uint) (tmp % 100);
  make_time((DATE_TIME_FORMAT*) 0, &ltime, val_buffer);
  return val_buffer;
}


/*
  Normally we would not consider 'time' as a valid date, but we allow
  get_date() here to be able to do things like
  DATE_FORMAT(time, "%l.%i %p")
*/
 
bool Field_time::get_date(TIME *ltime, uint fuzzydate)
{
  long tmp;
  THD *thd= table ? table->in_use : current_thd;
  if (!(fuzzydate & TIME_FUZZY_DATE))
  {
    push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                        ER_WARN_DATA_OUT_OF_RANGE,
                        ER(ER_WARN_DATA_OUT_OF_RANGE), field_name,
                        thd->row_count);
    return 1;
  }
  tmp=(long) sint3korr(ptr);
  ltime->neg=0;
  if (tmp < 0)
  {
    ltime->neg= 1;
    tmp=-tmp;
  }
  ltime->hour=tmp/10000;
  tmp-=ltime->hour*10000;
  ltime->minute=   tmp/100;
  ltime->second= tmp % 100;
  ltime->year= ltime->month= ltime->day= ltime->second_part= 0;
  return 0;
}


bool Field_time::get_time(TIME *ltime)
{
  long tmp=(long) sint3korr(ptr);
  ltime->neg=0;
  if (tmp < 0)
  {
    ltime->neg= 1;
    tmp=-tmp;
  }
  ltime->day= 0;
  ltime->hour=   (int) (tmp/10000);
  tmp-=ltime->hour*10000;
  ltime->minute= (int) tmp/100;
  ltime->second= (int) tmp % 100;
  ltime->second_part=0;
  ltime->time_type= MYSQL_TIMESTAMP_TIME;
  return 0;
}


bool Field_time::send_binary(Protocol *protocol)
{
  TIME tm;
  Field_time::get_time(&tm);
  tm.day= tm.hour/24;				// Move hours to days
  tm.hour-= tm.day*24;
  return protocol->store_time(&tm);
}


int Field_time::cmp(const char *a_ptr, const char *b_ptr)
{
  int32 a,b;
  a=(int32) sint3korr(a_ptr);
  b=(int32) sint3korr(b_ptr);
  return (a < b) ? -1 : (a > b) ? 1 : 0;
}

void Field_time::sort_string(char *to,uint length __attribute__((unused)))
{
  to[0] = (uchar) (ptr[2] ^ 128);
  to[1] = ptr[1];
  to[2] = ptr[0];
}

void Field_time::sql_type(String &res) const
{
  res.set_ascii(STRING_WITH_LEN("time"));
}

/****************************************************************************
** year type
** Save in a byte the year 0, 1901->2155
** Can handle 2 byte or 4 byte years!
****************************************************************************/

int Field_year::store(const char *from, uint len,CHARSET_INFO *cs)
{
  char *end;
  int error;
  long nr= my_strntol(cs, from, len, 10, &end, &error);

  if (nr < 0 || nr >= 100 && nr <= 1900 || nr > 2155 || error)
  {
    *ptr=0;
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
    return 1;
  }
  if (table->in_use->count_cuted_fields && check_int(from,len,end,cs))
    error= 1;

  if (nr != 0 || len != 4)
  {
    if (nr < YY_PART_YEAR)
      nr+=100;					// 2000 - 2069
    else if (nr > 1900)
      nr-= 1900;
  }
  *ptr= (char) (unsigned char) nr;
  return error;
}


int Field_year::store(double nr)
{
  if (nr < 0.0 || nr >= 2155.0)
  {
    (void) Field_year::store((longlong) -1, FALSE);
    return 1;
  }
  return Field_year::store((longlong) nr, FALSE);
}


int Field_year::store(longlong nr, bool unsigned_val)
{
  if (nr < 0 || nr >= 100 && nr <= 1900 || nr > 2155)
  {
    *ptr= 0;
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
    return 1;
  }
  if (nr != 0 || field_length != 4)		// 0000 -> 0; 00 -> 2000
  {
    if (nr < YY_PART_YEAR)
      nr+=100;					// 2000 - 2069
    else if (nr > 1900)
      nr-= 1900;
  }
  *ptr= (char) (unsigned char) nr;
  return 0;
}


bool Field_year::send_binary(Protocol *protocol)
{
  ulonglong tmp= Field_year::val_int();
  return protocol->store_short(tmp);
}


double Field_year::val_real(void)
{
  return (double) Field_year::val_int();
}


longlong Field_year::val_int(void)
{
  int tmp= (int) ((uchar*) ptr)[0];
  if (field_length != 4)
    tmp%=100;					// Return last 2 char
  else if (tmp)
    tmp+=1900;
  return (longlong) tmp;
}


String *Field_year::val_str(String *val_buffer,
			    String *val_ptr __attribute__((unused)))
{
  val_buffer->alloc(5);
  val_buffer->length(field_length);
  char *to=(char*) val_buffer->ptr();
  sprintf(to,field_length == 2 ? "%02d" : "%04d",(int) Field_year::val_int());
  return val_buffer;
}


void Field_year::sql_type(String &res) const
{
  CHARSET_INFO *cs=res.charset();
  res.length(cs->cset->snprintf(cs,(char*)res.ptr(),res.alloced_length(),
			  "year(%d)",(int) field_length));
}


/****************************************************************************
** date type
** In string context: YYYY-MM-DD
** In number context: YYYYMMDD
** Stored as a 4 byte unsigned int
****************************************************************************/

int Field_date::store(const char *from, uint len,CHARSET_INFO *cs)
{
  TIME l_time;
  uint32 tmp;
  int error;
  THD *thd= table ? table->in_use : current_thd;

  if (str_to_datetime(from, len, &l_time, TIME_FUZZY_DATE |
                      (thd->variables.sql_mode &
                       (MODE_NO_ZERO_IN_DATE | MODE_NO_ZERO_DATE |
                        MODE_INVALID_DATES)),
                      &error) <= MYSQL_TIMESTAMP_ERROR)
  {
    tmp= 0;
    error= 2;
  }
  else
    tmp=(uint32) l_time.year*10000L + (uint32) (l_time.month*100+l_time.day);

  if (error)
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED,
                         from, len, MYSQL_TIMESTAMP_DATE, 1);

#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
  {
    int4store(ptr,tmp);
  }
  else
#endif
    longstore(ptr,tmp);
  return error;
}


int Field_date::store(double nr)
{
  longlong tmp;
  int error= 0;
  if (nr >= 19000000000000.0 && nr <= 99991231235959.0)
    nr=floor(nr/1000000.0);			// Timestamp to date
  if (nr < 0.0 || nr > 99991231.0)
  {
    tmp= LL(0);
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                         ER_WARN_DATA_OUT_OF_RANGE,
                         nr, MYSQL_TIMESTAMP_DATE);
    error= 1;
  }
  else
    tmp= (longlong) rint(nr);

  return Field_date::store(tmp, TRUE);
}


int Field_date::store(longlong nr, bool unsigned_val)
{
  TIME not_used;
  int error;
  longlong initial_nr= nr;
  THD *thd= table ? table->in_use : current_thd;

  nr= number_to_datetime(nr, &not_used, (TIME_FUZZY_DATE |
                                         (thd->variables.sql_mode &
                                          (MODE_NO_ZERO_IN_DATE |
                                           MODE_NO_ZERO_DATE |
                                           MODE_INVALID_DATES))), &error);

  if (nr == LL(-1))
  {
    nr= 0;
    error= 2;
  }

  if (nr >= 19000000000000.0 && nr <= 99991231235959.0)
    nr= (longlong) floor(nr/1000000.0);         // Timestamp to date

  if (error)
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                         error == 2 ? ER_WARN_DATA_OUT_OF_RANGE :
                         WARN_DATA_TRUNCATED, initial_nr,
                         MYSQL_TIMESTAMP_DATETIME, 1);

#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
  {
    int4store(ptr, nr);
  }
  else
#endif
    longstore(ptr, nr);
  return error;
}


bool Field_date::send_binary(Protocol *protocol)
{
  longlong tmp= Field_date::val_int();
  TIME tm;
  tm.year= (uint32) tmp/10000L % 10000;
  tm.month= (uint32) tmp/100 % 100;
  tm.day= (uint32) tmp % 100;
  return protocol->store_date(&tm);
}


double Field_date::val_real(void)
{
  int32 j;
#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
    j=sint4korr(ptr);
  else
#endif
    longget(j,ptr);
  return (double) (uint32) j;
}


longlong Field_date::val_int(void)
{
  int32 j;
#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
    j=sint4korr(ptr);
  else
#endif
    longget(j,ptr);
  return (longlong) (uint32) j;
}


String *Field_date::val_str(String *val_buffer,
			    String *val_ptr __attribute__((unused)))
{
  TIME ltime;
  val_buffer->alloc(field_length);
  int32 tmp;
#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
    tmp=sint4korr(ptr);
  else
#endif
    longget(tmp,ptr);
  ltime.neg= 0;
  ltime.year= (int) ((uint32) tmp/10000L % 10000);
  ltime.month= (int) ((uint32) tmp/100 % 100);
  ltime.day= (int) ((uint32) tmp % 100);
  make_date((DATE_TIME_FORMAT *) 0, &ltime, val_buffer);
  return val_buffer;
}


int Field_date::cmp(const char *a_ptr, const char *b_ptr)
{
  int32 a,b;
#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
  {
    a=sint4korr(a_ptr);
    b=sint4korr(b_ptr);
  }
  else
#endif
  {
    longget(a,a_ptr);
    longget(b,b_ptr);
  }
  return ((uint32) a < (uint32) b) ? -1 : ((uint32) a > (uint32) b) ? 1 : 0;
}


void Field_date::sort_string(char *to,uint length __attribute__((unused)))
{
#ifdef WORDS_BIGENDIAN
  if (!table || !table->s->db_low_byte_first)
  {
    to[0] = ptr[0];
    to[1] = ptr[1];
    to[2] = ptr[2];
    to[3] = ptr[3];
  }
  else
#endif
  {
    to[0] = ptr[3];
    to[1] = ptr[2];
    to[2] = ptr[1];
    to[3] = ptr[0];
  }
}

void Field_date::sql_type(String &res) const
{
  res.set_ascii(STRING_WITH_LEN("date"));
}


/****************************************************************************
** The new date type
** This is identical to the old date type, but stored on 3 bytes instead of 4
** In number context: YYYYMMDD
****************************************************************************/

int Field_newdate::store(const char *from,uint len,CHARSET_INFO *cs)
{
  TIME l_time;
  long tmp;
  int error;
  THD *thd= table ? table->in_use : current_thd;
  if (str_to_datetime(from, len, &l_time,
                      (TIME_FUZZY_DATE |
                       (thd->variables.sql_mode &
                        (MODE_NO_ZERO_IN_DATE | MODE_NO_ZERO_DATE |
                         MODE_INVALID_DATES))),
                      &error) <= MYSQL_TIMESTAMP_ERROR)
  {
    tmp= 0L;
    error= 2;
  }
  else
    tmp= l_time.day + l_time.month*32 + l_time.year*16*32;

  if (error)
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED,
                         from, len, MYSQL_TIMESTAMP_DATE, 1);

  int3store(ptr,tmp);
  return error;
}


int Field_newdate::store(double nr)
{
  if (nr < 0.0 || nr > 99991231235959.0)
  {
    int3store(ptr,(int32) 0);
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                         WARN_DATA_TRUNCATED, nr, MYSQL_TIMESTAMP_DATE);
    return 1;
  }
  return Field_newdate::store((longlong) rint(nr), FALSE);
}


int Field_newdate::store(longlong nr, bool unsigned_val)
{
  TIME l_time;
  longlong tmp;
  int error;
  THD *thd= table ? table->in_use : current_thd;
  if (number_to_datetime(nr, &l_time,
                         (TIME_FUZZY_DATE |
                          (thd->variables.sql_mode &
                           (MODE_NO_ZERO_IN_DATE | MODE_NO_ZERO_DATE |
                            MODE_INVALID_DATES))),
                         &error) == LL(-1))
  {
    tmp= 0L;
    error= 2;
  }
  else
    tmp= l_time.day + l_time.month*32 + l_time.year*16*32;

  if (error)
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                         error == 2 ? ER_WARN_DATA_OUT_OF_RANGE :
                         WARN_DATA_TRUNCATED,nr,MYSQL_TIMESTAMP_DATE, 1);

  int3store(ptr,tmp);
  return error;
}


int Field_newdate::store_time(TIME *ltime,timestamp_type type)
{
  long tmp;
  int error= 0;
  if (type == MYSQL_TIMESTAMP_DATE || type == MYSQL_TIMESTAMP_DATETIME)
  {
    tmp=ltime->year*16*32+ltime->month*32+ltime->day;
    if ((my_bool)check_date(ltime, tmp,
                            (TIME_FUZZY_DATE |
                             (current_thd->variables.sql_mode &
                              (MODE_NO_ZERO_IN_DATE | MODE_NO_ZERO_DATE |
                               MODE_INVALID_DATES))), &error))
    {
      char buff[12];
      String str(buff, sizeof(buff), &my_charset_latin1);
      make_date((DATE_TIME_FORMAT *) 0, ltime, &str);
      set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED,
                           str.ptr(), str.length(), MYSQL_TIMESTAMP_DATE, 1);
    }
  }
  else
  {
    tmp=0;
    error= 1;
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
  }
  int3store(ptr,tmp);
  return error;
}


bool Field_newdate::send_binary(Protocol *protocol)
{
  TIME tm;
  Field_newdate::get_date(&tm,0);
  return protocol->store_date(&tm);
}


double Field_newdate::val_real(void)
{
  return (double) Field_newdate::val_int();
}


longlong Field_newdate::val_int(void)
{
  ulong j= uint3korr(ptr);
  j= (j % 32L)+(j / 32L % 16L)*100L + (j/(16L*32L))*10000L;
  return (longlong) j;
}


String *Field_newdate::val_str(String *val_buffer,
			       String *val_ptr __attribute__((unused)))
{
  val_buffer->alloc(field_length);
  val_buffer->length(field_length);
  uint32 tmp=(uint32) uint3korr(ptr);
  int part;
  char *pos=(char*) val_buffer->ptr()+10;

  /* Open coded to get more speed */
  *pos--=0;					// End NULL
  part=(int) (tmp & 31);
  *pos--= (char) ('0'+part%10);
  *pos--= (char) ('0'+part/10);
  *pos--= '-';
  part=(int) (tmp >> 5 & 15);
  *pos--= (char) ('0'+part%10);
  *pos--= (char) ('0'+part/10);
  *pos--= '-';
  part=(int) (tmp >> 9);
  *pos--= (char) ('0'+part%10); part/=10;
  *pos--= (char) ('0'+part%10); part/=10;
  *pos--= (char) ('0'+part%10); part/=10;
  *pos=   (char) ('0'+part);
  return val_buffer;
}


bool Field_newdate::get_date(TIME *ltime,uint fuzzydate)
{
  uint32 tmp=(uint32) uint3korr(ptr);
  ltime->day=   tmp & 31;
  ltime->month= (tmp >> 5) & 15;
  ltime->year=  (tmp >> 9);
  ltime->time_type= MYSQL_TIMESTAMP_DATE;
  ltime->hour= ltime->minute= ltime->second= ltime->second_part= ltime->neg= 0;
  return ((!(fuzzydate & TIME_FUZZY_DATE) && (!ltime->month || !ltime->day)) ?
          1 : 0);
}


bool Field_newdate::get_time(TIME *ltime)
{
  return Field_newdate::get_date(ltime,0);
}


int Field_newdate::cmp(const char *a_ptr, const char *b_ptr)
{
  uint32 a,b;
  a=(uint32) uint3korr(a_ptr);
  b=(uint32) uint3korr(b_ptr);
  return (a < b) ? -1 : (a > b) ? 1 : 0;
}


void Field_newdate::sort_string(char *to,uint length __attribute__((unused)))
{
  to[0] = ptr[2];
  to[1] = ptr[1];
  to[2] = ptr[0];
}


void Field_newdate::sql_type(String &res) const
{
  res.set_ascii(STRING_WITH_LEN("date"));
}


/****************************************************************************
** datetime type
** In string context: YYYY-MM-DD HH:MM:DD
** In number context: YYYYMMDDHHMMDD
** Stored as a 8 byte unsigned int. Should sometimes be change to a 6 byte int.
****************************************************************************/

int Field_datetime::store(const char *from,uint len,CHARSET_INFO *cs)
{
  TIME time_tmp;
  int error;
  ulonglong tmp= 0;
  enum enum_mysql_timestamp_type func_res;
  THD *thd= table ? table->in_use : current_thd;

  func_res= str_to_datetime(from, len, &time_tmp,
                            (TIME_FUZZY_DATE |
                             (thd->variables.sql_mode &
                              (MODE_NO_ZERO_IN_DATE | MODE_NO_ZERO_DATE |
                               MODE_INVALID_DATES))),
                            &error);
  if ((int) func_res > (int) MYSQL_TIMESTAMP_ERROR)
    tmp= TIME_to_ulonglong_datetime(&time_tmp);
  else
    error= 1;                                 // Fix if invalid zero date

  if (error)
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                         ER_WARN_DATA_OUT_OF_RANGE,
                         from, len, MYSQL_TIMESTAMP_DATETIME, 1);

#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
  {
    int8store(ptr,tmp);
  }
  else
#endif
    longlongstore(ptr,tmp);
  return error;
}


int Field_datetime::store(double nr)
{
  int error= 0;
  if (nr < 0.0 || nr > 99991231235959.0)
  {
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, 
                         ER_WARN_DATA_OUT_OF_RANGE,
                         nr, MYSQL_TIMESTAMP_DATETIME);
    nr= 0.0;
    error= 1;
  }
  error|= Field_datetime::store((longlong) rint(nr), FALSE);
  return error;
}


int Field_datetime::store(longlong nr, bool unsigned_val)
{
  TIME not_used;
  int error;
  longlong initial_nr= nr;
  THD *thd= table ? table->in_use : current_thd;

  nr= number_to_datetime(nr, &not_used, (TIME_FUZZY_DATE |
                                         (thd->variables.sql_mode &
                                          (MODE_NO_ZERO_IN_DATE |
                                           MODE_NO_ZERO_DATE |
                                           MODE_INVALID_DATES))), &error);

  if (nr == LL(-1))
  {
    nr= 0;
    error= 2;
  }

  if (error)
    set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                         error == 2 ? ER_WARN_DATA_OUT_OF_RANGE :
                         WARN_DATA_TRUNCATED, initial_nr,
                         MYSQL_TIMESTAMP_DATETIME, 1);

#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
  {
    int8store(ptr,nr);
  }
  else
#endif
    longlongstore(ptr,nr);
  return error;
}


int Field_datetime::store_time(TIME *ltime,timestamp_type type)
{
  longlong tmp;
  int error= 0;
  /*
    We don't perform range checking here since values stored in TIME
    structure always fit into DATETIME range.
  */
  if (type == MYSQL_TIMESTAMP_DATE || type == MYSQL_TIMESTAMP_DATETIME)
  {
    tmp=((ltime->year*10000L+ltime->month*100+ltime->day)*LL(1000000)+
	 (ltime->hour*10000L+ltime->minute*100+ltime->second));
    if ((my_bool)check_date(ltime, tmp,
                            (TIME_FUZZY_DATE |
                             (current_thd->variables.sql_mode &
                              (MODE_NO_ZERO_IN_DATE | MODE_NO_ZERO_DATE |
                               MODE_INVALID_DATES))), &error))
    {
      char buff[12];
      String str(buff, sizeof(buff), &my_charset_latin1);
      make_datetime((DATE_TIME_FORMAT *) 0, ltime, &str);
      set_datetime_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED,
                           str.ptr(), str.length(), MYSQL_TIMESTAMP_DATETIME,1);
    }
  }
  else
  {
    tmp=0;
    error= 1;
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
  }
#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
  {
    int8store(ptr,tmp);
  }
  else
#endif
    longlongstore(ptr,tmp);
  return error;
}

bool Field_datetime::send_binary(Protocol *protocol)
{
  TIME tm;
  Field_datetime::get_date(&tm, TIME_FUZZY_DATE);
  return protocol->store(&tm);
}


double Field_datetime::val_real(void)
{
  return (double) Field_datetime::val_int();
}

longlong Field_datetime::val_int(void)
{
  longlong j;
#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
    j=sint8korr(ptr);
  else
#endif
    longlongget(j,ptr);
  return j;
}


String *Field_datetime::val_str(String *val_buffer,
				String *val_ptr __attribute__((unused)))
{
  val_buffer->alloc(field_length);
  val_buffer->length(field_length);
  ulonglong tmp;
  long part1,part2;
  char *pos;
  int part3;

#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
    tmp=sint8korr(ptr);
  else
#endif
    longlongget(tmp,ptr);

  /*
    Avoid problem with slow longlong arithmetic and sprintf
  */

  part1=(long) (tmp/LL(1000000));
  part2=(long) (tmp - (ulonglong) part1*LL(1000000));

  pos=(char*) val_buffer->ptr()+19;
  *pos--=0;
  *pos--= (char) ('0'+(char) (part2%10)); part2/=10;
  *pos--= (char) ('0'+(char) (part2%10)); part3= (int) (part2 / 10);
  *pos--= ':';
  *pos--= (char) ('0'+(char) (part3%10)); part3/=10;
  *pos--= (char) ('0'+(char) (part3%10)); part3/=10;
  *pos--= ':';
  *pos--= (char) ('0'+(char) (part3%10)); part3/=10;
  *pos--= (char) ('0'+(char) part3);
  *pos--= ' ';
  *pos--= (char) ('0'+(char) (part1%10)); part1/=10;
  *pos--= (char) ('0'+(char) (part1%10)); part1/=10;
  *pos--= '-';
  *pos--= (char) ('0'+(char) (part1%10)); part1/=10;
  *pos--= (char) ('0'+(char) (part1%10)); part3= (int) (part1/10);
  *pos--= '-';
  *pos--= (char) ('0'+(char) (part3%10)); part3/=10;
  *pos--= (char) ('0'+(char) (part3%10)); part3/=10;
  *pos--= (char) ('0'+(char) (part3%10)); part3/=10;
  *pos=(char) ('0'+(char) part3);
  return val_buffer;
}

bool Field_datetime::get_date(TIME *ltime, uint fuzzydate)
{
  longlong tmp=Field_datetime::val_int();
  uint32 part1,part2;
  part1=(uint32) (tmp/LL(1000000));
  part2=(uint32) (tmp - (ulonglong) part1*LL(1000000));

  ltime->time_type=	MYSQL_TIMESTAMP_DATETIME;
  ltime->neg=		0;
  ltime->second_part=	0;
  ltime->second=	(int) (part2%100);
  ltime->minute=	(int) (part2/100%100);
  ltime->hour=		(int) (part2/10000);
  ltime->day=		(int) (part1%100);
  ltime->month= 	(int) (part1/100%100);
  ltime->year= 		(int) (part1/10000);
  return (!(fuzzydate & TIME_FUZZY_DATE) && (!ltime->month || !ltime->day)) ? 1 : 0;
}

bool Field_datetime::get_time(TIME *ltime)
{
  return Field_datetime::get_date(ltime,0);
}

int Field_datetime::cmp(const char *a_ptr, const char *b_ptr)
{
  longlong a,b;
#ifdef WORDS_BIGENDIAN
  if (table && table->s->db_low_byte_first)
  {
    a=sint8korr(a_ptr);
    b=sint8korr(b_ptr);
  }
  else
#endif
  {
    longlongget(a,a_ptr);
    longlongget(b,b_ptr);
  }
  return ((ulonglong) a < (ulonglong) b) ? -1 :
    ((ulonglong) a > (ulonglong) b) ? 1 : 0;
}

void Field_datetime::sort_string(char *to,uint length __attribute__((unused)))
{
#ifdef WORDS_BIGENDIAN
  if (!table || !table->s->db_low_byte_first)
  {
    to[0] = ptr[0];
    to[1] = ptr[1];
    to[2] = ptr[2];
    to[3] = ptr[3];
    to[4] = ptr[4];
    to[5] = ptr[5];
    to[6] = ptr[6];
    to[7] = ptr[7];
  }
  else
#endif
  {
    to[0] = ptr[7];
    to[1] = ptr[6];
    to[2] = ptr[5];
    to[3] = ptr[4];
    to[4] = ptr[3];
    to[5] = ptr[2];
    to[6] = ptr[1];
    to[7] = ptr[0];
  }
}


void Field_datetime::sql_type(String &res) const
{
  res.set_ascii(STRING_WITH_LEN("datetime"));
}

/****************************************************************************
** string type
** A string may be varchar or binary
****************************************************************************/

	/* Copy a string and fill with space */

int Field_string::store(const char *from,uint length,CHARSET_INFO *cs)
{
  int error= 0, well_formed_error;
  uint32 not_used;
  char buff[STRING_BUFFER_USUAL_SIZE];
  String tmpstr(buff,sizeof(buff), &my_charset_bin);
  uint copy_length;

  /* See the comment for Field_long::store(long long) */
  DBUG_ASSERT(table->in_use == current_thd);

  /* Convert character set if necessary */
  if (String::needs_conversion(length, cs, field_charset, &not_used))
  {
    uint conv_errors;
    tmpstr.copy(from, length, cs, field_charset, &conv_errors);
    from= tmpstr.ptr();
    length= tmpstr.length();
    if (conv_errors)
      error= 2;
  }

  /* Make sure we don't break a multibyte sequence or copy malformed data. */
  copy_length= field_charset->cset->well_formed_len(field_charset,
                                                    from,from+length,
                                                    field_length/
                                                    field_charset->mbmaxlen,
                                                    &well_formed_error);
  memmove(ptr, from, copy_length);

  /* Append spaces if the string was shorter than the field. */
  if (copy_length < field_length)
    field_charset->cset->fill(field_charset,ptr+copy_length,
                              field_length-copy_length,
                              field_charset->pad_char);

  /*
    Check if we lost any important data (anything in a binary string,
    or any non-space in others).
  */
  if ((copy_length < length) && table->in_use->count_cuted_fields)
  {
    if (binary())
      error= 2;
    else
    {
      const char *end=from+length;
      from+= copy_length;
      from+= field_charset->cset->scan(field_charset, from, end,
                                       MY_SEQ_SPACES);
      if (from != end)
        error= 2;
    }
  }
  if (error)
  {
    if (table->in_use->abort_on_warning)
      set_warning(MYSQL_ERROR::WARN_LEVEL_ERROR, ER_DATA_TOO_LONG, 1);
    else
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
  }
  return error;
}


/*
  Store double value in Field_string or Field_varstring.

  SYNOPSIS
    store(double nr)
    nr            number

  DESCRIPTION
    Pretty prints double number into field_length characters buffer.
*/

int Field_str::store(double nr)
{
  char buff[DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE];
  uint length;
  bool use_scientific_notation= TRUE;
  uint char_length= field_length / charset()->mbmaxlen;
  /*
    Check fabs(nr) against longest value that can be stored in field,
    which depends on whether the value is < 1 or not, and negative or not
  */
  double anr= fabs(nr);
  int neg= (nr < 0.0) ? 1 : 0;
  if (char_length > 4 && char_length < 32 &&
      (anr < 1.0 ? anr > 1/(log_10[max(0,(int) char_length-neg-2)]) /* -2 for "0." */
                 : anr < log_10[char_length-neg]-1))
    use_scientific_notation= FALSE;

  length= (uint) my_sprintf(buff, (buff, "%-.*g",
                                   (use_scientific_notation ?
                                    max(0, (int)char_length-neg-5) :
                                    char_length),
                                   nr));
  /*
    +1 below is because "precision" in %g above means the
    max. number of significant digits, not the output width.
    Thus the width can be larger than number of significant digits by 1
    (for decimal point)
    the test for char_length < 5 is for extreme cases,
    like inserting 500.0 in char(1)
  */
  DBUG_ASSERT(char_length < 5 || length <= char_length+1);
  return store((const char *) buff, length, charset());
}


int Field_string::store(longlong nr, bool unsigned_val)
{
  char buff[64];
  int  l;
  CHARSET_INFO *cs=charset();
  l= (cs->cset->longlong10_to_str)(cs,buff,sizeof(buff),
                                   unsigned_val ? 10 : -10, nr);
  return Field_string::store(buff,(uint)l,cs);
}


int Field_longstr::store_decimal(const my_decimal *d)
{
  char buff[DECIMAL_MAX_STR_LENGTH+1];
  String str(buff, sizeof(buff), &my_charset_bin);
  my_decimal2string(E_DEC_FATAL_ERROR, d, 0, 0, 0, &str);
  return store(str.ptr(), str.length(), str.charset());
}


double Field_string::val_real(void)
{
  int not_used;
  char *end_not_used;
  CHARSET_INFO *cs= charset();
  return my_strntod(cs,ptr,field_length,&end_not_used,&not_used);
}


longlong Field_string::val_int(void)
{
  int not_used;
  char *end_not_used;
  CHARSET_INFO *cs=charset();
  return my_strntoll(cs,ptr,field_length,10,&end_not_used,&not_used);
}


String *Field_string::val_str(String *val_buffer __attribute__((unused)),
			      String *val_ptr)
{
  uint length= field_charset->cset->lengthsp(field_charset, ptr, field_length);
  /* See the comment for Field_long::store(long long) */
  DBUG_ASSERT(table->in_use == current_thd);
  val_ptr->set((const char*) ptr, length, field_charset);
  return val_ptr;
}


my_decimal *Field_string::val_decimal(my_decimal *decimal_value)
{
  str2my_decimal(E_DEC_FATAL_ERROR, ptr, field_length, charset(),
                 decimal_value);
  return decimal_value;
}


int Field_string::cmp(const char *a_ptr, const char *b_ptr)
{
  uint a_len, b_len;

  if (field_charset->mbmaxlen != 1)
  {
    uint char_len= field_length/field_charset->mbmaxlen;
    a_len= my_charpos(field_charset, a_ptr, a_ptr + field_length, char_len);
    b_len= my_charpos(field_charset, b_ptr, b_ptr + field_length, char_len);
  }
  else
    a_len= b_len= field_length;
  /*
    We have to remove end space to be able to compare multi-byte-characters
    like in latin_de 'ae' and 0xe4
  */
  return field_charset->coll->strnncollsp(field_charset,
                                          (const uchar*) a_ptr, a_len,
                                          (const uchar*) b_ptr, b_len,
                                          0);
}


void Field_string::sort_string(char *to,uint length)
{
  uint tmp=my_strnxfrm(field_charset,
		       (unsigned char *) to, length,
		       (unsigned char *) ptr, field_length);
  DBUG_ASSERT(tmp == length);
}


void Field_string::sql_type(String &res) const
{
  THD *thd= table->in_use;
  CHARSET_INFO *cs=res.charset();
  ulong length;

  length= cs->cset->snprintf(cs,(char*) res.ptr(),
                             res.alloced_length(), "%s(%d)",
                             ((type() == MYSQL_TYPE_VAR_STRING &&
                               !thd->variables.new_mode) ?
                              (has_charset() ? "varchar" : "varbinary") :
			      (has_charset() ? "char" : "binary")),
                             (int) field_length / charset()->mbmaxlen);
  res.length(length);
  if ((thd->variables.sql_mode & (MODE_MYSQL323 | MODE_MYSQL40)) &&
      has_charset() && (charset()->state & MY_CS_BINSORT))
    res.append(STRING_WITH_LEN(" binary"));
}


char *Field_string::pack(char *to, const char *from, uint max_length)
{
  uint length=      min(field_length,max_length);
  uint char_length= max_length/field_charset->mbmaxlen;
  if (length > char_length)
    char_length= my_charpos(field_charset, from, from+length, char_length);
  set_if_smaller(length, char_length);
  while (length && from[length-1] == ' ')
    length--;
  *to++= (char) (uchar) length;
  if (field_length > 255)
    *to++= (char) (uchar) (length >> 8);
  memcpy(to, from, length);
  return to+length;
}


const char *Field_string::unpack(char *to, const char *from)
{
  uint length;
  if (field_length > 255)
  {
    length= uint2korr(from);
    from+= 2;
  }
  else
    length= (uint) (uchar) *from++;
  memcpy(to, from, (int) length);
  bfill(to+length, field_length - length, ' ');
  return from+length;
}


/*
  Compare two packed keys

  SYNOPSIS
    pack_cmp()
     a			New key
     b			Original key
     length		Key length
     insert_or_update	1 if this is an insert or update

  RETURN
    < 0	  a < b
    0	  a = b
    > 0   a > b
*/

int Field_string::pack_cmp(const char *a, const char *b, uint length,
                           my_bool insert_or_update)
{
  uint a_length, b_length;
  if (length > 255)
  {
    a_length= uint2korr(a);
    b_length= uint2korr(b);
    a+= 2;
    b+= 2;
  }
  else
  {
    a_length= (uint) (uchar) *a++;
    b_length= (uint) (uchar) *b++;
  }
  return field_charset->coll->strnncollsp(field_charset,
                                          (const uchar*) a, a_length,
                                          (const uchar*) b, b_length,
                                          insert_or_update);
}


/*
  Compare a packed key against row

  SYNOPSIS
    pack_cmp()
     key		Original key
     length		Key length. (May be less than field length)
     insert_or_update	1 if this is an insert or update

  RETURN
    < 0	  row < key
    0	  row = key
    > 0   row > key
*/

int Field_string::pack_cmp(const char *key, uint length,
                           my_bool insert_or_update)
{
  uint row_length, key_length;
  char *end;
  if (length > 255)
  {
    key_length= uint2korr(key);
    key+= 2;
  }
  else
    key_length= (uint) (uchar) *key++;
  
  /* Only use 'length' of key, not field_length */
  end= ptr + length;
  while (end > ptr && end[-1] == ' ')
    end--;
  row_length= (uint) (end - ptr);

  return field_charset->coll->strnncollsp(field_charset,
                                          (const uchar*) ptr, row_length,
                                          (const uchar*) key, key_length,
                                          insert_or_update);
}


uint Field_string::packed_col_length(const char *data_ptr, uint length)
{
  if (length > 255)
    return uint2korr(data_ptr)+2;
  return (uint) ((uchar) *data_ptr)+1;
}


uint Field_string::max_packed_col_length(uint max_length)
{
  return (max_length > 255 ? 2 : 1)+max_length;
}


Field *Field_string::new_field(MEM_ROOT *root, struct st_table *new_table,
                               bool keep_type)
{
  Field *new_field;

  if (type() != MYSQL_TYPE_VAR_STRING || keep_type)
    new_field= Field::new_field(root, new_table, keep_type);
  else
  {

    /*
      Old VARCHAR field which should be modified to a VARCHAR on copy
      This is done to ensure that ALTER TABLE will convert old VARCHAR fields
      to now VARCHAR fields.
    */
    new_field= new Field_varstring(field_length, maybe_null(),
                                   field_name, new_table, charset());
    /*
      Normally orig_table is different from table only if field was created
      via ::new_field.  Here we alter the type of field, so ::new_field is
      not applicable. But we still need to preserve the original field
      metadata for the client-server protocol.
    */
    new_field->orig_table= orig_table;
  }
  return new_field;
}

/****************************************************************************
  VARCHAR type
  Data in field->ptr is stored as:
    1 or 2 bytes length-prefix-header  (from Field_varstring::length_bytes)
    data

  NOTE:
  When VARCHAR is stored in a key (for handler::index_read() etc) it's always
  stored with a 2 byte prefix. (Just like blob keys).

  Normally length_bytes is calculated as (field_length < 256 : 1 ? 2)
  The exception is if there is a prefix key field that is part of a long
  VARCHAR, in which case field_length for this may be 1 but the length_bytes
  is 2.
****************************************************************************/


int Field_varstring::store(const char *from,uint length,CHARSET_INFO *cs)
{
  uint32 not_used, copy_length;
  char buff[STRING_BUFFER_USUAL_SIZE];
  String tmpstr(buff,sizeof(buff), &my_charset_bin);
  int error_code= 0, well_formed_error;
  enum MYSQL_ERROR::enum_warning_level level= MYSQL_ERROR::WARN_LEVEL_WARN;

  /* Convert character set if necessary */
  if (String::needs_conversion(length, cs, field_charset, &not_used))
  { 
    uint conv_errors;
    tmpstr.copy(from, length, cs, field_charset, &conv_errors);
    from= tmpstr.ptr();
    length=  tmpstr.length();
    if (conv_errors)
      error_code= WARN_DATA_TRUNCATED;
  }
  /* 
    Make sure we don't break a multibyte sequence
    as well as don't copy a malformed data.
  */
  copy_length= field_charset->cset->well_formed_len(field_charset,
						    from,from+length,
						    field_length/
						    field_charset->mbmaxlen,
                                                    &well_formed_error);
  memmove(ptr + length_bytes, from, copy_length);
  if (length_bytes == 1)
    *ptr= (uchar) copy_length;
  else
    int2store(ptr, copy_length);

  // Check if we lost something other than just trailing spaces
  if ((copy_length < length) && table->in_use->count_cuted_fields &&
      !error_code)
  {
    if (!binary())
    {
      const char *end= from + length;
      from+= copy_length;
      from+= field_charset->cset->scan(field_charset, from, end, MY_SEQ_SPACES);
      /* If we lost only spaces then produce a NOTE, not a WARNING */
      if (from == end)
        level= MYSQL_ERROR::WARN_LEVEL_NOTE;
    }
    error_code= WARN_DATA_TRUNCATED;
  }
  if (error_code)
  {
    if (level == MYSQL_ERROR::WARN_LEVEL_WARN &&
        table->in_use->abort_on_warning)
      error_code= ER_DATA_TOO_LONG;
    set_warning(level, error_code, 1);
    return 2;
  }
  return 0;
}


int Field_varstring::store(longlong nr, bool unsigned_val)
{
  char buff[64];
  uint  length;
  length= (uint) (field_charset->cset->longlong10_to_str)(field_charset,
                                                          buff,
                                                          sizeof(buff),
                                                          (unsigned_val ? 10:
                                                           -10),
                                                           nr);
  return Field_varstring::store(buff, length, field_charset);
}


double Field_varstring::val_real(void)
{
  int not_used;
  char *end_not_used;
  uint length= length_bytes == 1 ? (uint) (uchar) *ptr : uint2korr(ptr);
  return my_strntod(field_charset, ptr+length_bytes, length, &end_not_used,
                    &not_used);
}


longlong Field_varstring::val_int(void)
{
  int not_used;
  char *end_not_used;
  uint length= length_bytes == 1 ? (uint) (uchar) *ptr : uint2korr(ptr);
  return my_strntoll(field_charset, ptr+length_bytes, length, 10,
                     &end_not_used, &not_used);
}

String *Field_varstring::val_str(String *val_buffer __attribute__((unused)),
				 String *val_ptr)
{
  uint length=  length_bytes == 1 ? (uint) (uchar) *ptr : uint2korr(ptr);
  val_ptr->set((const char*) ptr+length_bytes, length, field_charset);
  return val_ptr;
}


my_decimal *Field_varstring::val_decimal(my_decimal *decimal_value)
{
  uint length= length_bytes == 1 ? (uint) (uchar) *ptr : uint2korr(ptr);
  str2my_decimal(E_DEC_FATAL_ERROR, ptr+length_bytes, length, charset(),
                 decimal_value);
  return decimal_value;
}


int Field_varstring::cmp(const char *a_ptr, const char *b_ptr)
{
  uint a_length, b_length;
  int diff;

  if (length_bytes == 1)
  {
    a_length= (uint) (uchar) *a_ptr;
    b_length= (uint) (uchar) *b_ptr;
  }
  else
  {
    a_length= uint2korr(a_ptr);
    b_length= uint2korr(b_ptr);
  }
  diff= field_charset->coll->strnncollsp(field_charset,
                                         (const uchar*) a_ptr+
                                         length_bytes,
                                         a_length,
                                         (const uchar*) b_ptr+
                                         length_bytes,
                                         b_length,0);
  return diff;
}


/*
  NOTE: varstring and blob keys are ALWAYS stored with a 2 byte length prefix
*/

int Field_varstring::key_cmp(const byte *key_ptr, uint max_key_length)
{
  uint length=  length_bytes == 1 ? (uint) (uchar) *ptr : uint2korr(ptr);
  uint char_length= max_key_length / field_charset->mbmaxlen;

  char_length= my_charpos(field_charset, ptr + length_bytes,
                          ptr + length_bytes + length, char_length);
  set_if_smaller(length, char_length);
  return field_charset->coll->strnncollsp(field_charset, 
                                          (const uchar*) ptr + length_bytes,
                                          length,
                                          (const uchar*) key_ptr+
                                          HA_KEY_BLOB_LENGTH,
                                          uint2korr(key_ptr), 0);
}


/*
  Compare to key segments (always 2 byte length prefix)

  NOTE
    This is used only to compare key segments created for index_read().
    (keys are created and compared in key.cc)
*/

int Field_varstring::key_cmp(const byte *a,const byte *b)
{
  return field_charset->coll->strnncollsp(field_charset,
                                          (const uchar*) a +
                                          HA_KEY_BLOB_LENGTH,
                                          uint2korr(a),
                                          (const uchar*) b +
                                          HA_KEY_BLOB_LENGTH,
                                          uint2korr(b),
                                          0);
}


void Field_varstring::sort_string(char *to,uint length)
{
  uint tot_length=  length_bytes == 1 ? (uint) (uchar) *ptr : uint2korr(ptr);

  if (field_charset == &my_charset_bin)
  {
    /* Store length last in high-byte order to sort longer strings first */
    if (length_bytes == 1)
      to[length-1]= tot_length;
    else
      mi_int2store(to+length-2, tot_length);
    length-= length_bytes;
  }
 
  tot_length= my_strnxfrm(field_charset,
			  (uchar*) to, length,
			  (uchar*) ptr + length_bytes,
			  tot_length);
  DBUG_ASSERT(tot_length == length);
}


enum ha_base_keytype Field_varstring::key_type() const
{
  enum ha_base_keytype res;

  if (binary())
    res= length_bytes == 1 ? HA_KEYTYPE_VARBINARY1 : HA_KEYTYPE_VARBINARY2;
  else
    res= length_bytes == 1 ? HA_KEYTYPE_VARTEXT1 : HA_KEYTYPE_VARTEXT2;
  return res;
}


void Field_varstring::sql_type(String &res) const
{
  THD *thd= table->in_use;
  CHARSET_INFO *cs=res.charset();
  ulong length;

  length= cs->cset->snprintf(cs,(char*) res.ptr(),
                             res.alloced_length(), "%s(%d)",
                              (has_charset() ? "varchar" : "varbinary"),
                             (int) field_length / charset()->mbmaxlen);
  res.length(length);
  if ((thd->variables.sql_mode & (MODE_MYSQL323 | MODE_MYSQL40)) &&
      has_charset() && (charset()->state & MY_CS_BINSORT))
    res.append(STRING_WITH_LEN(" binary"));
}


uint32 Field_varstring::data_length(const char *from)
{
  return length_bytes == 1 ? (uint) (uchar) *ptr : uint2korr(ptr);
}

/*
  Functions to create a packed row.
  Here the number of length bytes are depending on the given max_length
*/

char *Field_varstring::pack(char *to, const char *from, uint max_length)
{
  uint length= length_bytes == 1 ? (uint) (uchar) *from : uint2korr(from);
  set_if_smaller(max_length, field_length);
  if (length > max_length)
    length=max_length;
  *to++= (char) (length & 255);
  if (max_length > 255)
    *to++= (char) (length >> 8);
  if (length)
    memcpy(to, from+length_bytes, length);
  return to+length;
}


char *Field_varstring::pack_key(char *to, const char *key, uint max_length)
{
  uint length=  length_bytes == 1 ? (uint) (uchar) *key : uint2korr(key);
  uint char_length= ((field_charset->mbmaxlen > 1) ?
                     max_length/field_charset->mbmaxlen : max_length);
  key+= length_bytes;
  if (length > char_length)
  {
    char_length= my_charpos(field_charset, key, key+length, char_length);
    set_if_smaller(length, char_length);
  }
  *to++= (char) (length & 255);
  if (max_length > 255)
    *to++= (char) (length >> 8);
  if (length)
    memcpy(to, key, length);
  return to+length;
}


/*
  Unpack a key into a record buffer.

  SYNOPSIS
    unpack_key()
    to                          Pointer into the record buffer.
    key                         Pointer to the packed key.
    max_length                  Key length limit from key description.

  DESCRIPTION
    A VARCHAR key has a maximum size of 64K-1.
    In its packed form, the length field is one or two bytes long,
    depending on 'max_length'.

  RETURN
    Pointer to end of 'key' (To the next key part if multi-segment key)
*/

const char *Field_varstring::unpack_key(char *to, const char *key,
                                      uint max_length)
{
  /* get length of the blob key */
  uint32 length= *((uchar*) key++);
  if (max_length > 255)
    length+= (*((uchar*) key++)) << 8;

  /* put the length into the record buffer */
  if (length_bytes == 1)
    *ptr= (uchar) length;
  else
    int2store(ptr, length);
  memcpy(ptr + length_bytes, key, length);
  return key + length;
}

/*
  Create a packed key that will be used for storage in the index tree

  SYNOPSIS
    pack_key_from_key_image()
    to			Store packed key segment here
    from		Key segment (as given to index_read())
    max_length  	Max length of key

  RETURN
    end of key storage
*/

char *Field_varstring::pack_key_from_key_image(char *to, const char *from,
                                               uint max_length)
{
  /* Key length is always stored as 2 bytes */
  uint length= uint2korr(from);
  if (length > max_length)
    length= max_length;
  *to++= (char) (length & 255);
  if (max_length > 255)
    *to++= (char) (length >> 8);
  if (length)
    memcpy(to, from+HA_KEY_BLOB_LENGTH, length);
  return to+length;
}


/*
  unpack field packed with Field_varstring::pack()
*/

const char *Field_varstring::unpack(char *to, const char *from)
{
  uint length;
  if (length_bytes == 1)
    length= (uint) (uchar) (*to= *from++);
  else
  {
    length= uint2korr(from);
    to[0]= *from++;
    to[1]= *from++;
  }
  if (length)
    memcpy(to+ length_bytes, from, length);
  return from+length;
}


int Field_varstring::pack_cmp(const char *a, const char *b, uint key_length,
                              my_bool insert_or_update)
{
  uint a_length, b_length;
  if (key_length > 255)
  {
    a_length=uint2korr(a); a+= 2;
    b_length=uint2korr(b); b+= 2;
  }
  else
  {
    a_length= (uint) (uchar) *a++;
    b_length= (uint) (uchar) *b++;
  }
  return field_charset->coll->strnncollsp(field_charset,
                                          (const uchar*) a, a_length,
                                          (const uchar*) b, b_length,
                                          insert_or_update);
}


int Field_varstring::pack_cmp(const char *b, uint key_length,
                              my_bool insert_or_update)
{
  char *a= ptr+ length_bytes;
  uint a_length=  length_bytes == 1 ? (uint) (uchar) *ptr : uint2korr(ptr);
  uint b_length;
  uint char_length= ((field_charset->mbmaxlen > 1) ?
                     key_length / field_charset->mbmaxlen : key_length);

  if (key_length > 255)
  {
    b_length=uint2korr(b); b+= HA_KEY_BLOB_LENGTH;
  }
  else
    b_length= (uint) (uchar) *b++;

  if (a_length > char_length)
  {
    char_length= my_charpos(field_charset, a, a+a_length, char_length);
    set_if_smaller(a_length, char_length);
  }

  return field_charset->coll->strnncollsp(field_charset,
                                          (const uchar*) a,
                                          a_length,
                                          (const uchar*) b, b_length,
                                          insert_or_update);
}


uint Field_varstring::packed_col_length(const char *data_ptr, uint length)
{
  if (length > 255)
    return uint2korr(data_ptr)+2;
  return (uint) ((uchar) *data_ptr)+1;
}


uint Field_varstring::max_packed_col_length(uint max_length)
{
  return (max_length > 255 ? 2 : 1)+max_length;
}


void Field_varstring::get_key_image(char *buff, uint length, imagetype type)
{
  uint f_length=  length_bytes == 1 ? (uint) (uchar) *ptr : uint2korr(ptr);
  uint char_length= length / field_charset->mbmaxlen;
  char *pos= ptr+length_bytes;
  char_length= my_charpos(field_charset, pos, pos + f_length, char_length);
  set_if_smaller(f_length, char_length);
  /* Key is always stored with 2 bytes */
  int2store(buff,f_length);
  memcpy(buff+HA_KEY_BLOB_LENGTH, pos, f_length);
  if (f_length < length)
  {
    /*
      Must clear this as we do a memcmp in opt_range.cc to detect
      identical keys
    */
    bzero(buff+HA_KEY_BLOB_LENGTH+f_length, (length-f_length));
  }
}


void Field_varstring::set_key_image(char *buff,uint length)
{
  length= uint2korr(buff);			// Real length is here
  (void) Field_varstring::store(buff+HA_KEY_BLOB_LENGTH, length,
                                field_charset);
}


int Field_varstring::cmp_binary(const char *a_ptr, const char *b_ptr,
                                uint32 max_length)
{
  uint32 a_length,b_length;

  if (length_bytes == 1)
  {
    a_length= (uint) (uchar) *a_ptr;
    b_length= (uint) (uchar) *b_ptr;
  }
  else
  {
    a_length= uint2korr(a_ptr);
    b_length= uint2korr(b_ptr);
  }
  set_if_smaller(a_length, max_length);
  set_if_smaller(b_length, max_length);
  if (a_length != b_length)
    return 1;
  return memcmp(a_ptr+length_bytes, b_ptr+length_bytes, a_length);
}


Field *Field_varstring::new_field(MEM_ROOT *root, struct st_table *new_table,
                                  bool keep_type)
{
  Field_varstring *res= (Field_varstring*) Field::new_field(root, new_table,
                                                            keep_type);
  if (res)
    res->length_bytes= length_bytes;
  return res;
}


Field *Field_varstring::new_key_field(MEM_ROOT *root,
                                      struct st_table *new_table,
                                      char *new_ptr, uchar *new_null_ptr,
                                      uint new_null_bit)
{
  Field_varstring *res;
  if ((res= (Field_varstring*) Field::new_key_field(root,
                                                    new_table,
                                                    new_ptr,
                                                    new_null_ptr,
                                                    new_null_bit)))
  {
    /* Keys length prefixes are always packed with 2 bytes */
    res->length_bytes= 2;
  }
  return res;
}


/****************************************************************************
** blob type
** A blob is saved as a length and a pointer. The length is stored in the
** packlength slot and may be from 1-4.
****************************************************************************/

Field_blob::Field_blob(char *ptr_arg, uchar *null_ptr_arg, uchar null_bit_arg,
		       enum utype unireg_check_arg, const char *field_name_arg,
		       struct st_table *table_arg,uint blob_pack_length,
		       CHARSET_INFO *cs)
  :Field_longstr(ptr_arg, BLOB_PACK_LENGTH_TO_MAX_LENGH(blob_pack_length),
	     null_ptr_arg, null_bit_arg, unireg_check_arg, field_name_arg,
	     table_arg, cs),
   packlength(blob_pack_length)
{
  flags|= BLOB_FLAG;
  if (table)
  {
    table->s->blob_fields++;
    /* TODO: why do not fill table->s->blob_field array here? */
  }
}


void Field_blob::store_length(uint32 number)
{
  switch (packlength) {
  case 1:
    ptr[0]= (uchar) number;
    break;
  case 2:
#ifdef WORDS_BIGENDIAN
    if (table->s->db_low_byte_first)
    {
      int2store(ptr,(unsigned short) number);
    }
    else
#endif
      shortstore(ptr,(unsigned short) number);
    break;
  case 3:
    int3store(ptr,number);
    break;
  case 4:
#ifdef WORDS_BIGENDIAN
    if (table->s->db_low_byte_first)
    {
      int4store(ptr,number);
    }
    else
#endif
      longstore(ptr,number);
  }
}


uint32 Field_blob::get_length(const char *pos)
{
  switch (packlength) {
  case 1:
    return (uint32) (uchar) pos[0];
  case 2:
    {
      uint16 tmp;
#ifdef WORDS_BIGENDIAN
      if (table->s->db_low_byte_first)
	tmp=sint2korr(pos);
      else
#endif
	shortget(tmp,pos);
      return (uint32) tmp;
    }
  case 3:
    return (uint32) uint3korr(pos);
  case 4:
    {
      uint32 tmp;
#ifdef WORDS_BIGENDIAN
      if (table->s->db_low_byte_first)
	tmp=uint4korr(pos);
      else
#endif
	longget(tmp,pos);
      return (uint32) tmp;
    }
  }
  return 0;					// Impossible
}


/*
  Put a blob length field into a record buffer.

  SYNOPSIS
    Field_blob::put_length()
    pos                         Pointer into the record buffer.
    length                      The length value to put.

  DESCRIPTION
    Depending on the maximum length of a blob, its length field is
    put into 1 to 4 bytes. This is a property of the blob object,
    described by 'packlength'.

  RETURN
    nothing
*/

void Field_blob::put_length(char *pos, uint32 length)
{
  switch (packlength) {
  case 1:
    *pos= (char) length;
    break;
  case 2:
    int2store(pos, length);
    break;
  case 3:
    int3store(pos, length);
    break;
  case 4:
    int4store(pos, length);
    break;
  }
}


int Field_blob::store(const char *from,uint length,CHARSET_INFO *cs)
{
  int error= 0, well_formed_error;
  if (!length)
  {
    bzero(ptr,Field_blob::pack_length());
  }
  else
  {
    bool was_conversion;
    char buff[STRING_BUFFER_USUAL_SIZE];
    String tmpstr(buff,sizeof(buff), &my_charset_bin);
    uint copy_length;
    uint32 not_used;

    /* Convert character set if necessary */
    if ((was_conversion= String::needs_conversion(length, cs, field_charset,
						  &not_used)))
    { 
      uint conv_errors;
      if (tmpstr.copy(from, length, cs, field_charset, &conv_errors))
      {
        /* Fatal OOM error */
        bzero(ptr,Field_blob::pack_length());
        return -1;
      }
      from= tmpstr.ptr();
      length=  tmpstr.length();
      if (conv_errors)
        error= 2;
    }
    
    copy_length= max_data_length();
    /*
      copy_length is OK as last argument to well_formed_len as this is never
      used to limit the length of the data. The cut of long data is done with
      the 'min()' call below.
    */
    copy_length= field_charset->cset->well_formed_len(field_charset,
                                                      from,from +
                                                      min(length, copy_length),
                                                      copy_length,
                                                      &well_formed_error);
    if (copy_length < length)
      error= 2;
    Field_blob::store_length(copy_length);
    if (was_conversion || table->copy_blobs || copy_length <= MAX_FIELD_WIDTH)
    {						// Must make a copy
      if (from != value.ptr())			// For valgrind
      {
	value.copy(from,copy_length,charset());
	from=value.ptr();
      }
    }
    bmove(ptr+packlength,(char*) &from,sizeof(char*));
  }
  if (error)
  {
    if (table->in_use->abort_on_warning)
      set_warning(MYSQL_ERROR::WARN_LEVEL_ERROR, ER_DATA_TOO_LONG, 1);
    else
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
  }
  return 0;
}


int Field_blob::store(double nr)
{
  CHARSET_INFO *cs=charset();
  value.set(nr, 2, cs);
  return Field_blob::store(value.ptr(),(uint) value.length(), cs);
}


int Field_blob::store(longlong nr, bool unsigned_val)
{
  CHARSET_INFO *cs=charset();
  if (unsigned_val)
    value.set((ulonglong) nr, cs);
  else
    value.set(nr, cs);
  return Field_blob::store(value.ptr(), (uint) value.length(), cs);
}


double Field_blob::val_real(void)
{
  int not_used;
  char *end_not_used, *blob;
  uint32 length;
  CHARSET_INFO *cs;

  memcpy_fixed(&blob,ptr+packlength,sizeof(char*));
  if (!blob)
    return 0.0;
  length= get_length(ptr);
  cs= charset();
  return my_strntod(cs, blob, length, &end_not_used, &not_used);
}


longlong Field_blob::val_int(void)
{
  int not_used;
  char *blob;
  memcpy_fixed(&blob,ptr+packlength,sizeof(char*));
  if (!blob)
    return 0;
  uint32 length=get_length(ptr);
  return my_strntoll(charset(),blob,length,10,NULL,&not_used);
}

String *Field_blob::val_str(String *val_buffer __attribute__((unused)),
			    String *val_ptr)
{
  char *blob;
  memcpy_fixed(&blob,ptr+packlength,sizeof(char*));
  if (!blob)
    val_ptr->set("",0,charset());	// A bit safer than ->length(0)
  else
    val_ptr->set((const char*) blob,get_length(ptr),charset());
  return val_ptr;
}


my_decimal *Field_blob::val_decimal(my_decimal *decimal_value)
{
  const char *blob;
  memcpy_fixed(&blob, ptr+packlength, sizeof(const char*));
  if (!blob)
    blob= "";
  str2my_decimal(E_DEC_FATAL_ERROR, blob, get_length(ptr), charset(),
                 decimal_value);
  return decimal_value;
}


int Field_blob::cmp(const char *a,uint32 a_length, const char *b,
		    uint32 b_length)
{
  return field_charset->coll->strnncollsp(field_charset, 
                                          (const uchar*)a, a_length,
                                          (const uchar*)b, b_length,
                                          0);
}


int Field_blob::cmp(const char *a_ptr, const char *b_ptr)
{
  char *blob1,*blob2;
  memcpy_fixed(&blob1,a_ptr+packlength,sizeof(char*));
  memcpy_fixed(&blob2,b_ptr+packlength,sizeof(char*));
  return Field_blob::cmp(blob1,get_length(a_ptr),
			 blob2,get_length(b_ptr));
}


int Field_blob::cmp_binary(const char *a_ptr, const char *b_ptr,
			   uint32 max_length)
{
  char *a,*b;
  uint diff;
  uint32 a_length,b_length;
  memcpy_fixed(&a,a_ptr+packlength,sizeof(char*));
  memcpy_fixed(&b,b_ptr+packlength,sizeof(char*));
  a_length=get_length(a_ptr);
  if (a_length > max_length)
    a_length=max_length;
  b_length=get_length(b_ptr);
  if (b_length > max_length)
    b_length=max_length;
  diff=memcmp(a,b,min(a_length,b_length));
  return diff ? diff : (int) (a_length - b_length);
}


/* The following is used only when comparing a key */

void Field_blob::get_key_image(char *buff, uint length, imagetype type)
{
  uint32 blob_length= get_length(ptr);
  char *blob;

#ifdef HAVE_SPATIAL
  if (type == itMBR)
  {
    const char *dummy;
    MBR mbr;
    Geometry_buffer buffer;
    Geometry *gobj;

    if (blob_length < SRID_SIZE)
    {
      bzero(buff, SIZEOF_STORED_DOUBLE*4);
      return;
    }
    get_ptr(&blob);
    gobj= Geometry::construct(&buffer, blob, blob_length);
    if (!gobj || gobj->get_mbr(&mbr, &dummy))
      bzero(buff, SIZEOF_STORED_DOUBLE*4);
    else
    {
      float8store(buff,    mbr.xmin);
      float8store(buff+8,  mbr.xmax);
      float8store(buff+16, mbr.ymin);
      float8store(buff+24, mbr.ymax);
    }
    return;
  }
#endif /*HAVE_SPATIAL*/

  get_ptr(&blob);
  uint char_length= length / field_charset->mbmaxlen;
  char_length= my_charpos(field_charset, blob, blob + blob_length,
                          char_length);
  set_if_smaller(blob_length, char_length);

  if ((uint32) length > blob_length)
  {
    /*
      Must clear this as we do a memcmp in opt_range.cc to detect
      identical keys
    */
    bzero(buff+HA_KEY_BLOB_LENGTH+blob_length, (length-blob_length));
    length=(uint) blob_length;
  }
  int2store(buff,length);
  memcpy(buff+HA_KEY_BLOB_LENGTH, blob, length);
}


void Field_blob::set_key_image(char *buff,uint length)
{
  length= uint2korr(buff);
  (void) Field_blob::store(buff+HA_KEY_BLOB_LENGTH, length, field_charset);
}


int Field_blob::key_cmp(const byte *key_ptr, uint max_key_length)
{
  char *blob1;
  uint blob_length=get_length(ptr);
  memcpy_fixed(&blob1,ptr+packlength,sizeof(char*));
  CHARSET_INFO *cs= charset();
  uint char_length= max_key_length / cs->mbmaxlen;
  char_length= my_charpos(cs, blob1, blob1+blob_length, char_length);
  set_if_smaller(blob_length, char_length);
  return Field_blob::cmp(blob1, blob_length,
			 (char*) key_ptr+HA_KEY_BLOB_LENGTH,
			 uint2korr(key_ptr));
}

int Field_blob::key_cmp(const byte *a,const byte *b)
{
  return Field_blob::cmp((char*) a+HA_KEY_BLOB_LENGTH, uint2korr(a),
			 (char*) b+HA_KEY_BLOB_LENGTH, uint2korr(b));
}


uint32 Field_blob::sort_length() const
{
  return (uint32) (current_thd->variables.max_sort_length + 
                   (field_charset == &my_charset_bin ? 0 : packlength));
}


void Field_blob::sort_string(char *to,uint length)
{
  char *blob;
  uint blob_length=get_length();

  if (!blob_length)
    bzero(to,length);
  else
  {
    if (field_charset == &my_charset_bin)
    {
      char *pos;

      /*
        Store length of blob last in blob to shorter blobs before longer blobs
      */
      length-= packlength;
      pos= to+length;

      switch (packlength) {
      case 1:
        *pos= (char) blob_length;
        break;
      case 2:
        mi_int2store(pos, blob_length);
        break;
      case 3:
        mi_int3store(pos, blob_length);
        break;
      case 4:
        mi_int4store(pos, blob_length);
        break;
      }
    }
    memcpy_fixed(&blob,ptr+packlength,sizeof(char*));
    
    blob_length=my_strnxfrm(field_charset,
                            (uchar*) to, length, 
                            (uchar*) blob, blob_length);
    DBUG_ASSERT(blob_length == length);
  }
}


void Field_blob::sql_type(String &res) const
{
  const char *str;
  uint length;
  switch (packlength) {
  default: str="tiny"; length=4; break;
  case 2:  str="";     length=0; break;
  case 3:  str="medium"; length= 6; break;
  case 4:  str="long";  length=4; break;
  }
  res.set_ascii(str,length);
  if (charset() == &my_charset_bin)
    res.append(STRING_WITH_LEN("blob"));
  else
  {
    res.append(STRING_WITH_LEN("text"));
  }
}


char *Field_blob::pack(char *to, const char *from, uint max_length)
{
  char *save=ptr;
  ptr=(char*) from;
  uint32 length=get_length();			// Length of from string
  if (length > max_length)
  {
    ptr=to;
    length=max_length;
    store_length(length);			// Store max length
    ptr=(char*) from;
  }
  else
    memcpy(to,from,packlength);			// Copy length
  if (length)
  {
    get_ptr((char**) &from);
    memcpy(to+packlength, from,length);
  }
  ptr=save;					// Restore org row pointer
  return to+packlength+length;
}


const char *Field_blob::unpack(char *to, const char *from)
{
  memcpy(to,from,packlength);
  uint32 length=get_length(from);
  from+=packlength;
  if (length)
    memcpy_fixed(to+packlength, &from, sizeof(from));
  else
    bzero(to+packlength,sizeof(from));
  return from+length;
}

/* Keys for blobs are like keys on varchars */

int Field_blob::pack_cmp(const char *a, const char *b, uint key_length,
                         my_bool insert_or_update)
{
  uint a_length, b_length;
  if (key_length > 255)
  {
    a_length=uint2korr(a); a+=2;
    b_length=uint2korr(b); b+=2;
  }
  else
  {
    a_length= (uint) (uchar) *a++;
    b_length= (uint) (uchar) *b++;
  }
  return field_charset->coll->strnncollsp(field_charset,
                                          (const uchar*) a, a_length,
                                          (const uchar*) b, b_length,
                                          insert_or_update);
}


int Field_blob::pack_cmp(const char *b, uint key_length,
                         my_bool insert_or_update)
{
  char *a;
  memcpy_fixed(&a,ptr+packlength,sizeof(char*));
  if (!a)
    return key_length > 0 ? -1 : 0;
  uint a_length=get_length(ptr);
  uint b_length;

  if (key_length > 255)
  {
    b_length=uint2korr(b); b+=2;
  }
  else
    b_length= (uint) (uchar) *b++;
  return field_charset->coll->strnncollsp(field_charset,
                                          (const uchar*) a, a_length,
                                          (const uchar*) b, b_length,
                                          insert_or_update);
}

/* Create a packed key that will be used for storage from a MySQL row */

char *Field_blob::pack_key(char *to, const char *from, uint max_length)
{
  char *save=ptr;
  ptr=(char*) from;
  uint32 length=get_length();			// Length of from string
  uint char_length= ((field_charset->mbmaxlen > 1) ?
                     max_length/field_charset->mbmaxlen : max_length);
  if (length)
    get_ptr((char**) &from);
  if (length > char_length)
    char_length= my_charpos(field_charset, from, from+length, char_length);
  set_if_smaller(length, char_length);
  *to++= (uchar) length;
  if (max_length > 255)				// 2 byte length
    *to++= (uchar) (length >> 8);
  memcpy(to, from, length);
  ptr=save;					// Restore org row pointer
  return to+length;
}


/*
  Unpack a blob key into a record buffer.

  SYNOPSIS
    Field_blob::unpack_key()
    to                          Pointer into the record buffer.
    from                        Pointer to the packed key.
    max_length                  Key length limit from key description.

  DESCRIPTION
    A blob key has a maximum size of 64K-1.
    In its packed form, the length field is one or two bytes long,
    depending on 'max_length'.
    Depending on the maximum length of a blob, its length field is
    put into 1 to 4 bytes. This is a property of the blob object,
    described by 'packlength'.
    Blobs are internally stored apart from the record buffer, which
    contains a pointer to the blob buffer.

  RETURN
    Pointer into 'from' past the last byte copied from packed key.
*/

const char *Field_blob::unpack_key(char *to, const char *from, uint max_length)
{
  /* get length of the blob key */
  uint32 length= *((uchar*) from++);
  if (max_length > 255)
    length+= (*((uchar*) from++)) << 8;

  /* put the length into the record buffer */
  put_length(to, length);

  /* put the address of the blob buffer or NULL */
  if (length)
    memcpy_fixed(to + packlength, &from, sizeof(from));
  else
    bzero(to + packlength, sizeof(from));

  /* point to first byte of next field in 'from' */
  return from + length;
}


/* Create a packed key that will be used for storage from a MySQL key */

char *Field_blob::pack_key_from_key_image(char *to, const char *from,
					  uint max_length)
{
  uint length=uint2korr(from);
  if (length > max_length)
    length=max_length;
  *to++= (char) (length & 255);
  if (max_length > 255)
    *to++= (char) (length >> 8);
  if (length)
    memcpy(to, from+HA_KEY_BLOB_LENGTH, length);
  return to+length;
}


uint Field_blob::packed_col_length(const char *data_ptr, uint length)
{
  if (length > 255)
    return uint2korr(data_ptr)+2;
  return (uint) ((uchar) *data_ptr)+1;
}


uint Field_blob::max_packed_col_length(uint max_length)
{
  return (max_length > 255 ? 2 : 1)+max_length;
}


#ifdef HAVE_SPATIAL

void Field_geom::get_key_image(char *buff, uint length, imagetype type)
{
  char *blob;
  const char *dummy;
  MBR mbr;
  ulong blob_length= get_length(ptr);
  Geometry_buffer buffer;
  Geometry *gobj;

  if (blob_length < SRID_SIZE)
  {
    bzero(buff, SIZEOF_STORED_DOUBLE*4);
    return;
  }
  get_ptr(&blob);
  gobj= Geometry::construct(&buffer, blob, blob_length);
  if (!gobj || gobj->get_mbr(&mbr, &dummy))
    bzero(buff, SIZEOF_STORED_DOUBLE*4);
  else
  {
    float8store(buff, mbr.xmin);
    float8store(buff + 8, mbr.xmax);
    float8store(buff + 16, mbr.ymin);
    float8store(buff + 24, mbr.ymax);
  }
}


void Field_geom::sql_type(String &res) const
{
  CHARSET_INFO *cs= &my_charset_latin1;
  switch (geom_type)
  {
    case GEOM_POINT:
     res.set(STRING_WITH_LEN("point"), cs);
     break;
    case GEOM_LINESTRING:
     res.set(STRING_WITH_LEN("linestring"), cs);
     break;
    case GEOM_POLYGON:
     res.set(STRING_WITH_LEN("polygon"), cs);
     break;
    case GEOM_MULTIPOINT:
     res.set(STRING_WITH_LEN("multipoint"), cs);
     break;
    case GEOM_MULTILINESTRING:
     res.set(STRING_WITH_LEN("multilinestring"), cs);
     break;
    case GEOM_MULTIPOLYGON:
     res.set(STRING_WITH_LEN("multipolygon"), cs);
     break;
    case GEOM_GEOMETRYCOLLECTION:
     res.set(STRING_WITH_LEN("geometrycollection"), cs);
     break;
    default:
     res.set(STRING_WITH_LEN("geometry"), cs);
  }
}


int Field_geom::store(double nr)
{
  my_message(ER_CANT_CREATE_GEOMETRY_OBJECT,
             ER(ER_CANT_CREATE_GEOMETRY_OBJECT), MYF(0));
  return -1;
}


int Field_geom::store(longlong nr, bool unsigned_val)
{
  my_message(ER_CANT_CREATE_GEOMETRY_OBJECT,
             ER(ER_CANT_CREATE_GEOMETRY_OBJECT), MYF(0));
  return -1;
}


int Field_geom::store_decimal(const my_decimal *)
{
  my_message(ER_CANT_CREATE_GEOMETRY_OBJECT,
             ER(ER_CANT_CREATE_GEOMETRY_OBJECT), MYF(0));
  return -1;
}


int Field_geom::store(const char *from, uint length, CHARSET_INFO *cs)
{
  if (!length)
    bzero(ptr, Field_blob::pack_length());
  else
  {
    if (from == Geometry::bad_geometry_data.ptr())
      goto err;
    // Check given WKB
    uint32 wkb_type;
    if (length < SRID_SIZE + WKB_HEADER_SIZE + SIZEOF_STORED_DOUBLE*2)
      goto err;
    wkb_type= uint4korr(from + SRID_SIZE + 1);
    if (wkb_type < (uint32) Geometry::wkb_point ||
	wkb_type > (uint32) Geometry::wkb_end)
      goto err;
    Field_blob::store_length(length);
    if (table->copy_blobs || length <= MAX_FIELD_WIDTH)
    {						// Must make a copy
      value.copy(from, length, cs);
      from= value.ptr();
    }
    bmove(ptr + packlength, (char*) &from, sizeof(char*));
  }
  return 0;

err:
  bzero(ptr, Field_blob::pack_length());  
  my_message(ER_CANT_CREATE_GEOMETRY_OBJECT,
             ER(ER_CANT_CREATE_GEOMETRY_OBJECT), MYF(0));
  return -1;
}

#endif /*HAVE_SPATIAL*/

/****************************************************************************
** enum type.
** This is a string which only can have a selection of different values.
** If one uses this string in a number context one gets the type number.
****************************************************************************/

enum ha_base_keytype Field_enum::key_type() const
{
  switch (packlength) {
  default: return HA_KEYTYPE_BINARY;
  case 2: return HA_KEYTYPE_USHORT_INT;
  case 3: return HA_KEYTYPE_UINT24;
  case 4: return HA_KEYTYPE_ULONG_INT;
  case 8: return HA_KEYTYPE_ULONGLONG;
  }
}

void Field_enum::store_type(ulonglong value)
{
  switch (packlength) {
  case 1: ptr[0]= (uchar) value;  break;
  case 2:
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    int2store(ptr,(unsigned short) value);
  }
  else
#endif
    shortstore(ptr,(unsigned short) value);
  break;
  case 3: int3store(ptr,(long) value); break;
  case 4:
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    int4store(ptr,value);
  }
  else
#endif
    longstore(ptr,(long) value);
  break;
  case 8:
#ifdef WORDS_BIGENDIAN
  if (table->s->db_low_byte_first)
  {
    int8store(ptr,value);
  }
  else
#endif
    longlongstore(ptr,value); break;
  }
}


/*
** Note. Storing a empty string in a enum field gives a warning
** (if there isn't a empty value in the enum)
*/

int Field_enum::store(const char *from,uint length,CHARSET_INFO *cs)
{
  int err= 0;
  uint32 not_used;
  char buff[STRING_BUFFER_USUAL_SIZE];
  String tmpstr(buff,sizeof(buff), &my_charset_bin);

  /* Convert character set if necessary */
  if (String::needs_conversion(length, cs, field_charset, &not_used))
  { 
    uint dummy_errors;
    tmpstr.copy(from, length, cs, field_charset, &dummy_errors);
    from= tmpstr.ptr();
    length=  tmpstr.length();
  }

  /* Remove end space */
  length= field_charset->cset->lengthsp(field_charset, from, length);
  uint tmp=find_type2(typelib, from, length, field_charset);
  if (!tmp)
  {
    if (length < 6) // Can't be more than 99999 enums
    {
      /* This is for reading numbers with LOAD DATA INFILE */
      char *end;
      tmp=(uint) my_strntoul(cs,from,length,10,&end,&err);
      if (err || end != from+length || tmp > typelib->count)
      {
	tmp=0;
	set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
      }
    }
    else
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
  }
  store_type((ulonglong) tmp);
  return err;
}


int Field_enum::store(double nr)
{
  return Field_enum::store((longlong) nr, FALSE);
}


int Field_enum::store(longlong nr, bool unsigned_val)
{
  int error= 0;
  if ((ulonglong) nr > typelib->count || nr == 0)
  {
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
    nr=0;
    error=1;
  }
  store_type((ulonglong) (uint) nr);
  return error;
}


double Field_enum::val_real(void)
{
  return (double) Field_enum::val_int();
}


longlong Field_enum::val_int(void)
{
  switch (packlength) {
  case 1:
    return (longlong) (uchar) ptr[0];
  case 2:
    {
      uint16 tmp;
#ifdef WORDS_BIGENDIAN
      if (table->s->db_low_byte_first)
	tmp=sint2korr(ptr);
      else
#endif
	shortget(tmp,ptr);
      return (longlong) tmp;
    }
  case 3:
    return (longlong) uint3korr(ptr);
  case 4:
    {
      uint32 tmp;
#ifdef WORDS_BIGENDIAN
      if (table->s->db_low_byte_first)
	tmp=uint4korr(ptr);
      else
#endif
	longget(tmp,ptr);
      return (longlong) tmp;
    }
  case 8:
    {
      longlong tmp;
#ifdef WORDS_BIGENDIAN
      if (table->s->db_low_byte_first)
	tmp=sint8korr(ptr);
      else
#endif
	longlongget(tmp,ptr);
      return tmp;
    }
  }
  return 0;					// impossible
}


String *Field_enum::val_str(String *val_buffer __attribute__((unused)),
			    String *val_ptr)
{
  uint tmp=(uint) Field_enum::val_int();
  if (!tmp || tmp > typelib->count)
    val_ptr->set("", 0, field_charset);
  else
    val_ptr->set((const char*) typelib->type_names[tmp-1],
		 typelib->type_lengths[tmp-1],
		 field_charset);
  return val_ptr;
}

int Field_enum::cmp(const char *a_ptr, const char *b_ptr)
{
  char *old=ptr;
  ptr=(char*) a_ptr;
  ulonglong a=Field_enum::val_int();
  ptr=(char*) b_ptr;
  ulonglong b=Field_enum::val_int();
  ptr=old;
  return (a < b) ? -1 : (a > b) ? 1 : 0;
}

void Field_enum::sort_string(char *to,uint length __attribute__((unused)))
{
  ulonglong value=Field_enum::val_int();
  to+=packlength-1;
  for (uint i=0 ; i < packlength ; i++)
  {
    *to-- = (uchar) (value & 255);
    value>>=8;
  }
}


void Field_enum::sql_type(String &res) const
{
  char buffer[255];
  String enum_item(buffer, sizeof(buffer), res.charset());

  res.length(0);
  res.append(STRING_WITH_LEN("enum("));

  bool flag=0;
  uint *len= typelib->type_lengths;
  for (const char **pos= typelib->type_names; *pos; pos++, len++)
  {
    uint dummy_errors;
    if (flag)
      res.append(',');
    /* convert to res.charset() == utf8, then quote */
    enum_item.copy(*pos, *len, charset(), res.charset(), &dummy_errors);
    append_unescaped(&res, enum_item.ptr(), enum_item.length());
    flag= 1;
  }
  res.append(')');
}


/*
   set type.
   This is a string which can have a collection of different values.
   Each string value is separated with a ','.
   For example "One,two,five"
   If one uses this string in a number context one gets the bits as a longlong
   number.
*/


int Field_set::store(const char *from,uint length,CHARSET_INFO *cs)
{
  bool got_warning= 0;
  int err= 0;
  char *not_used;
  uint not_used2;
  uint32 not_used_offset;
  char buff[STRING_BUFFER_USUAL_SIZE];
  String tmpstr(buff,sizeof(buff), &my_charset_bin);

  /* Convert character set if necessary */
  if (String::needs_conversion(length, cs, field_charset, &not_used_offset))
  { 
    uint dummy_errors;
    tmpstr.copy(from, length, cs, field_charset, &dummy_errors);
    from= tmpstr.ptr();
    length=  tmpstr.length();
  }
  ulonglong tmp= find_set(typelib, from, length, field_charset,
                          &not_used, &not_used2, &got_warning);
  if (!tmp && length && length < 22)
  {
    /* This is for reading numbers with LOAD DATA INFILE */
    char *end;
    tmp=my_strntoull(cs,from,length,10,&end,&err);
    if (err || end != from+length ||
	tmp > (ulonglong) (((longlong) 1 << typelib->count) - (longlong) 1))
    {
      tmp=0;      
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
    }
  }
  else if (got_warning)
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
  store_type(tmp);
  return err;
}


int Field_set::store(longlong nr, bool unsigned_val)
{
  int error= 0;
  if ((ulonglong) nr > (ulonglong) (((longlong) 1 << typelib->count) -
				    (longlong) 1))
  {
    nr&= (longlong) (((longlong) 1 << typelib->count) - (longlong) 1);    
    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
    error=1;
  }
  store_type((ulonglong) nr);
  return error;
}


String *Field_set::val_str(String *val_buffer,
			   String *val_ptr __attribute__((unused)))
{
  ulonglong tmp=(ulonglong) Field_enum::val_int();
  uint bitnr=0;

  val_buffer->length(0);
  val_buffer->set_charset(field_charset);
  while (tmp && bitnr < (uint) typelib->count)
  {
    if (tmp & 1)
    {
      if (val_buffer->length())
	val_buffer->append(&field_separator, 1, &my_charset_latin1);
      String str(typelib->type_names[bitnr],
		 typelib->type_lengths[bitnr],
		 field_charset);
      val_buffer->append(str);
    }
    tmp>>=1;
    bitnr++;
  }
  return val_buffer;
}


void Field_set::sql_type(String &res) const
{
  char buffer[255];
  String set_item(buffer, sizeof(buffer), res.charset());

  res.length(0);
  res.append(STRING_WITH_LEN("set("));

  bool flag=0;
  uint *len= typelib->type_lengths;
  for (const char **pos= typelib->type_names; *pos; pos++, len++)
  {
    uint dummy_errors;
    if (flag)
      res.append(',');
    /* convert to res.charset() == utf8, then quote */
    set_item.copy(*pos, *len, charset(), res.charset(), &dummy_errors);
    append_unescaped(&res, set_item.ptr(), set_item.length());
    flag= 1;
  }
  res.append(')');
}

/* returns 1 if the fields are equally defined */

bool Field::eq_def(Field *field)
{
  if (real_type() != field->real_type() || charset() != field->charset() ||
      pack_length() != field->pack_length())
    return 0;
  return 1;
}

bool Field_enum::eq_def(Field *field)
{
  if (!Field::eq_def(field))
    return 0;
  TYPELIB *from_lib=((Field_enum*) field)->typelib;

  if (typelib->count < from_lib->count)
    return 0;
  for (uint i=0 ; i < from_lib->count ; i++)
    if (my_strnncoll(field_charset,
                     (const uchar*)typelib->type_names[i],
                     (uint) strlen(typelib->type_names[i]),
                     (const uchar*)from_lib->type_names[i],
                     (uint) strlen(from_lib->type_names[i])))
      return 0;
  return 1;
}

bool Field_num::eq_def(Field *field)
{
  if (!Field::eq_def(field))
    return 0;
  Field_num *from_num= (Field_num*) field;

  if (unsigned_flag != from_num->unsigned_flag ||
      zerofill && !from_num->zerofill && !zero_pack() ||
      dec != from_num->dec)
    return 0;
  return 1;
}


/*
  Bit field.

  We store the first 0 - 6 uneven bits among the null bits 
  at the start of the record. The rest bytes are stored in 
  the record itself.

  For example:

  CREATE TABLE t1 (a int, b bit(17), c bit(21) not null, d bit(8));
  We would store data  as follows in the record:

  Byte        Bit
  1           7 - reserve for delete
              6 - null bit for 'a'
              5 - null bit for 'b'
              4 - first (high) bit of 'b'
              3 - first (high) bit of 'c'
              2 - second bit of 'c'
              1 - third bit of 'c'
              0 - forth bit of 'c'
  2           7 - firth bit of 'c'
              6 - null bit for 'd'
  3 - 6       four bytes for 'a'
  7 - 8       two bytes for 'b'
  9 - 10      two bytes for 'c'
  11          one byte for 'd'
*/

Field_bit::Field_bit(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
                     uchar null_bit_arg, uchar *bit_ptr_arg, uchar bit_ofs_arg,
                     enum utype unireg_check_arg, const char *field_name_arg,
                     struct st_table *table_arg)
  : Field(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
          unireg_check_arg, field_name_arg, table_arg),
    bit_ptr(bit_ptr_arg), bit_ofs(bit_ofs_arg), bit_len(len_arg & 7),
    bytes_in_rec(len_arg / 8)
{
  /*
    Ensure that Field::eq() can distinguish between two different bit fields.
    (two bit fields that are not null, may have same ptr and null_ptr)
  */
  if (!null_ptr_arg)
    null_bit= bit_ofs_arg;
}


Field *Field_bit::new_key_field(MEM_ROOT *root,
                                struct st_table *new_table,
                                char *new_ptr, uchar *new_null_ptr,
                                uint new_null_bit)
{
  Field_bit *res;
  if ((res= (Field_bit*) Field::new_key_field(root, new_table,
                                              new_ptr, new_null_ptr,
                                              new_null_bit)))
  {
    /* Move bits normally stored in null_pointer to new_ptr */
    res->bit_ptr= (uchar*) new_ptr;
    res->bit_ofs= 0;
    if (bit_len)
      res->ptr++;                               // Store rest of data here
  }
  return res;
}


int Field_bit::store(const char *from, uint length, CHARSET_INFO *cs)
{
  int delta;

  for (; length && !*from; from++, length--);          // skip left 0's
  delta= bytes_in_rec - length;

  if (delta < -1 ||
      (delta == -1 && (uchar) *from > ((1 << bit_len) - 1)) ||
      (!bit_len && delta < 0))
  {
    set_rec_bits((1 << bit_len) - 1, bit_ptr, bit_ofs, bit_len);
    memset(ptr, 0xff, bytes_in_rec);
    if (table->in_use->really_abort_on_warning())
      set_warning(MYSQL_ERROR::WARN_LEVEL_ERROR, ER_DATA_TOO_LONG, 1);
    else
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
    return 1;
  }
  /* delta is >= -1 here */
  if (delta > 0)
  {
    if (bit_len)
      clr_rec_bits(bit_ptr, bit_ofs, bit_len);
    bzero(ptr, delta);
    memcpy(ptr + delta, from, length);
  }
  else if (delta == 0)
  {
    if (bit_len)
      clr_rec_bits(bit_ptr, bit_ofs, bit_len);
    memcpy(ptr, from, length);
  }
  else
  {
    if (bit_len)
    {
      set_rec_bits((uchar) *from, bit_ptr, bit_ofs, bit_len);
      from++;
    }
    memcpy(ptr, from, bytes_in_rec);
  }
  return 0;
}


int Field_bit::store(double nr)
{
  return store((longlong) nr, FALSE);
}


int Field_bit::store(longlong nr, bool unsigned_val)
{
  char buf[8];

  mi_int8store(buf, nr);
  return store(buf, 8, NULL);
}


int Field_bit::store_decimal(const my_decimal *val)
{
  int err= 0;
  longlong i= convert_decimal2longlong(val, 1, &err);
  return test(err | store(i));
}


double Field_bit::val_real(void)
{
  return (double) Field_bit::val_int();
}


longlong Field_bit::val_int(void)
{
  ulonglong bits= 0;
  if (bit_len)
  {
    bits= get_rec_bits(bit_ptr, bit_ofs, bit_len);
    bits<<= (bytes_in_rec * 8);
  }

  switch (bytes_in_rec) {
  case 0: return bits;
  case 1: return bits | (ulonglong) (uchar) ptr[0];
  case 2: return bits | mi_uint2korr(ptr);
  case 3: return bits | mi_uint3korr(ptr);
  case 4: return bits | mi_uint4korr(ptr);
  case 5: return bits | mi_uint5korr(ptr);
  case 6: return bits | mi_uint6korr(ptr);
  case 7: return bits | mi_uint7korr(ptr);
  default: return mi_uint8korr(ptr + bytes_in_rec - sizeof(longlong));
  }
}  


String *Field_bit::val_str(String *val_buffer,
                           String *val_ptr __attribute__((unused)))
{
  char buff[sizeof(longlong)];
  uint length= min(pack_length(), sizeof(longlong));
  ulonglong bits= val_int();
  mi_int8store(buff,bits);

  val_buffer->alloc(length);
  memcpy_fixed((char*) val_buffer->ptr(), buff+8-length, length);
  val_buffer->length(length);
  val_buffer->set_charset(&my_charset_bin);
  return val_buffer;
}


my_decimal *Field_bit::val_decimal(my_decimal *deciaml_value)
{
  int2my_decimal(E_DEC_FATAL_ERROR, val_int(), 1, deciaml_value);
  return deciaml_value;
}


int Field_bit::key_cmp(const byte *str, uint length)
{
  if (bit_len)
  {
    int flag;
    uchar bits= get_rec_bits(bit_ptr, bit_ofs, bit_len);
    if ((flag= (int) (bits - *(uchar*) str)))
      return flag;
    str++;
    length--;
  }
  return memcmp(ptr, str, length);
}


int Field_bit::cmp_offset(uint row_offset)
{
  if (bit_len)
  {
    int flag;
    uchar bits_a= get_rec_bits(bit_ptr, bit_ofs, bit_len);
    uchar bits_b= get_rec_bits(bit_ptr + row_offset, bit_ofs, bit_len);
    if ((flag= (int) (bits_a - bits_b)))
      return flag;
  }
  return memcmp(ptr, ptr + row_offset, bytes_in_rec);
}


void Field_bit::get_key_image(char *buff, uint length, imagetype type)
{
  if (bit_len)
  {
    uchar bits= get_rec_bits(bit_ptr, bit_ofs, bit_len);
    *buff++= bits;
    length--;
  }
  memcpy(buff, ptr, min(length, bytes_in_rec));
}


void Field_bit::sql_type(String &res) const
{
  CHARSET_INFO *cs= res.charset();
  ulong length= cs->cset->snprintf(cs, (char*) res.ptr(), res.alloced_length(),
                                   "bit(%d)", (int) field_length);
  res.length((uint) length);
}


char *Field_bit::pack(char *to, const char *from, uint max_length)
{
  DBUG_ASSERT(max_length);
  uint length;
  if (bit_len)
  {
    uchar bits= get_rec_bits(bit_ptr, bit_ofs, bit_len);
    *to++= bits;
  }
  length= min(bytes_in_rec, max_length - (bit_len > 0));
  memcpy(to, from, length);
  return to + length;
}


const char *Field_bit::unpack(char *to, const char *from)
{
  if (bit_len)
  {
    set_rec_bits(*from, bit_ptr, bit_ofs, bit_len);
    from++;
  }
  memcpy(to, from, bytes_in_rec);
  return from + bytes_in_rec;
}


/*
  Bit field support for non-MyISAM tables.
*/

Field_bit_as_char::Field_bit_as_char(char *ptr_arg, uint32 len_arg,
                                     uchar *null_ptr_arg, uchar null_bit_arg,
                                     enum utype unireg_check_arg,
                                     const char *field_name_arg,
                                     struct st_table *table_arg)
  : Field_bit(ptr_arg, len_arg, null_ptr_arg, null_bit_arg, 0,
              0, unireg_check_arg, field_name_arg, table_arg)
{
  bit_len= 0;
  bytes_in_rec= (len_arg + 7) / 8;
}


int Field_bit_as_char::store(const char *from, uint length, CHARSET_INFO *cs)
{
  int delta;
  uchar bits= field_length & 7;

  for (; length && !*from; from++, length--);          // skip left 0's
  delta= bytes_in_rec - length;

  if (delta < 0 ||
      (delta == 0 && bits && (uint) (uchar) *from >= (uint) (1 << bits)))
  {
    memset(ptr, 0xff, bytes_in_rec);
    if (bits)
      *ptr&= ((1 << bits) - 1); /* set first byte */
    if (table->in_use->really_abort_on_warning())
      set_warning(MYSQL_ERROR::WARN_LEVEL_ERROR, ER_DATA_TOO_LONG, 1);
    else
      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
    return 1;
  }
  bzero(ptr, delta);
  memcpy(ptr + delta, from, length);
  return 0;
}


void Field_bit_as_char::sql_type(String &res) const
{
  CHARSET_INFO *cs= res.charset();
  ulong length= cs->cset->snprintf(cs, (char*) res.ptr(), res.alloced_length(),
                                   "bit(%d)", (int) field_length);
  res.length((uint) length);
}


/*****************************************************************************
  Handling of field and create_field
*****************************************************************************/

/*
  Convert create_field::length from number of characters to number of bytes

  SYNOPSIS
    create_field::create_length_to_internal_length()
  
  DESCRIPTION
    Convert create_field::length from number of characters to number of bytes.
*/

void create_field::create_length_to_internal_length(void)
{
  switch (sql_type) {
  case MYSQL_TYPE_TINY_BLOB:
  case MYSQL_TYPE_MEDIUM_BLOB:
  case MYSQL_TYPE_LONG_BLOB:
  case MYSQL_TYPE_BLOB:
  case MYSQL_TYPE_VAR_STRING:
  case MYSQL_TYPE_STRING:
  case MYSQL_TYPE_VARCHAR:
    length*= charset->mbmaxlen;
    key_length= length;
    pack_length= calc_pack_length(sql_type, length);
    break;
  case MYSQL_TYPE_ENUM:
  case MYSQL_TYPE_SET:
    /* Pack_length already calculated in sql_parse.cc */
    length*= charset->mbmaxlen;
    key_length= pack_length;
    break;
  case MYSQL_TYPE_BIT:
    if (f_bit_as_char(pack_flag))
    {
      key_length= pack_length= ((length + 7) & ~7) / 8;
    }
    else
    {
      pack_length= length / 8;
      /* We need one extra byte to store the bits we save among the null bits */
      key_length= pack_length + test(length & 7);
    }
    break;
  case MYSQL_TYPE_NEWDECIMAL:
    key_length= pack_length=
      my_decimal_get_binary_size(my_decimal_length_to_precision(length,
								decimals,
								flags &
								UNSIGNED_FLAG),
				 decimals);
    break;
  default:
    key_length= pack_length= calc_pack_length(sql_type, length);
    break;
  }
}


void create_field::init_for_tmp_table(enum_field_types sql_type_arg,
                                      uint32 length_arg, uint32 decimals,
                                      bool maybe_null, bool is_unsigned)
{
  field_name= "";
  sql_type= sql_type_arg;
  char_length= length= length_arg;;
  unireg_check= Field::NONE;
  interval= 0;
  charset= &my_charset_bin;
  geom_type= Field::GEOM_GEOMETRY;
  pack_flag= (FIELDFLAG_NUMBER |
              ((decimals & FIELDFLAG_MAX_DEC) << FIELDFLAG_DEC_SHIFT) |
              (maybe_null ? FIELDFLAG_MAYBE_NULL : 0) |
              (is_unsigned ? 0 : FIELDFLAG_DECIMAL));
}


/*
  Initialize field definition for create

  SYNOPSIS
    thd                   Thread handle
    fld_name              Field name
    fld_type              Field type
    fld_length            Field length
    fld_decimals          Decimal (if any)
    fld_type_modifier     Additional type information
    fld_default_value     Field default value (if any)
    fld_on_update_value   The value of ON UPDATE clause
    fld_comment           Field comment
    fld_change            Field change
    fld_interval_list     Interval list (if any)
    fld_charset           Field charset
    fld_geom_type         Field geometry type (if any)

  RETURN
    FALSE on success
    TRUE  on error
*/

bool create_field::init(THD *thd, char *fld_name, enum_field_types fld_type,
                        char *fld_length, char *fld_decimals,
                        uint fld_type_modifier, Item *fld_default_value,
                        Item *fld_on_update_value, LEX_STRING *fld_comment,
                        char *fld_change, List<String> *fld_interval_list,
                        CHARSET_INFO *fld_charset, uint fld_geom_type)
{
  uint sign_len, allowed_type_modifier= 0;
  ulong max_field_charlength= MAX_FIELD_CHARLENGTH;

  DBUG_ENTER("create_field::init()");
  
  field= 0;
  field_name= fld_name;
  def= fld_default_value;
  flags= fld_type_modifier;
  unireg_check= (fld_type_modifier & AUTO_INCREMENT_FLAG ?
                 Field::NEXT_NUMBER : Field::NONE);
  decimals= fld_decimals ? (uint)atoi(fld_decimals) : 0;
  if (decimals >= NOT_FIXED_DEC)
  {
    my_error(ER_TOO_BIG_SCALE, MYF(0), decimals, fld_name,
             NOT_FIXED_DEC-1);
    DBUG_RETURN(TRUE);
  }

  sql_type= fld_type;
  length= 0;
  change= fld_change;
  interval= 0;
  pack_length= key_length= 0;
  charset= fld_charset;
  geom_type= (Field::geometry_type) fld_geom_type;
  interval_list.empty();

  comment= *fld_comment;
  /*
    Set NO_DEFAULT_VALUE_FLAG if this field doesn't have a default value and
    it is NOT NULL, not an AUTO_INCREMENT field and not a TIMESTAMP.
  */
  if (!fld_default_value && !(fld_type_modifier & AUTO_INCREMENT_FLAG) &&
      (fld_type_modifier & NOT_NULL_FLAG) && fld_type != FIELD_TYPE_TIMESTAMP)
    flags|= NO_DEFAULT_VALUE_FLAG;

  if (fld_length && !(length= (uint) atoi(fld_length)))
    fld_length= 0; /* purecov: inspected */
  sign_len= fld_type_modifier & UNSIGNED_FLAG ? 0 : 1;

  switch (fld_type) {
  case FIELD_TYPE_TINY:
    if (!fld_length)
      length= MAX_TINYINT_WIDTH+sign_len;
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_SHORT:
    if (!fld_length)
      length= MAX_SMALLINT_WIDTH+sign_len;
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_INT24:
    if (!fld_length)
      length= MAX_MEDIUMINT_WIDTH+sign_len;
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_LONG:
    if (!fld_length)
      length= MAX_INT_WIDTH+sign_len;
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_LONGLONG:
    if (!fld_length)
      length= MAX_BIGINT_WIDTH;
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_NULL:
    break;
  case FIELD_TYPE_NEWDECIMAL:
    if (!fld_length && !decimals)
      length= 10;
    if (length > DECIMAL_MAX_PRECISION)
    {
      my_error(ER_TOO_BIG_PRECISION, MYF(0), length, fld_name,
               DECIMAL_MAX_PRECISION);
      DBUG_RETURN(TRUE);
    }
    if (length < decimals)
    {
      my_error(ER_M_BIGGER_THAN_D, MYF(0), fld_name);
      DBUG_RETURN(TRUE);
    }
    length=
      my_decimal_precision_to_length(length, decimals,
                                     fld_type_modifier & UNSIGNED_FLAG);
    pack_length=
      my_decimal_get_binary_size(length, decimals);
    break;
  case MYSQL_TYPE_VARCHAR:
    /*
      Long VARCHAR's are automaticly converted to blobs in mysql_prepare_table
      if they don't have a default value
    */
    max_field_charlength= MAX_FIELD_VARCHARLENGTH;
    break;
  case MYSQL_TYPE_STRING:
    break;
  case FIELD_TYPE_BLOB:
  case FIELD_TYPE_TINY_BLOB:
  case FIELD_TYPE_LONG_BLOB:
  case FIELD_TYPE_MEDIUM_BLOB:
  case FIELD_TYPE_GEOMETRY:
    if (fld_default_value)
    {
      /* Allow empty as default value. */
      String str,*res;
      res= fld_default_value->val_str(&str);
      /*
        A default other than '' is always an error, and any non-NULL
        specified default is an error in strict mode.
      */
      if (res->length() || (thd->variables.sql_mode &
                            (MODE_STRICT_TRANS_TABLES |
                             MODE_STRICT_ALL_TABLES)))
      {
        my_error(ER_BLOB_CANT_HAVE_DEFAULT, MYF(0),
                 fld_name); /* purecov: inspected */
        DBUG_RETURN(TRUE);
      }
      else
      {
        /*
          Otherwise a default of '' is just a warning.
        */
        push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                            ER_BLOB_CANT_HAVE_DEFAULT,
                            ER(ER_BLOB_CANT_HAVE_DEFAULT),
                            fld_name);
      }
      def= 0;
    }
    flags|= BLOB_FLAG;
    break;
  case FIELD_TYPE_YEAR:
    if (!fld_length || length != 2)
      length= 4; /* Default length */
    flags|= ZEROFILL_FLAG | UNSIGNED_FLAG;
    break;
  case FIELD_TYPE_FLOAT:
    /* change FLOAT(precision) to FLOAT or DOUBLE */
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    if (fld_length && !fld_decimals)
    {
      uint tmp_length= length;
      if (tmp_length > PRECISION_FOR_DOUBLE)
      {
        my_error(ER_WRONG_FIELD_SPEC, MYF(0), fld_name);
        DBUG_RETURN(TRUE);
      }
      else if (tmp_length > PRECISION_FOR_FLOAT)
      {
        sql_type= FIELD_TYPE_DOUBLE;
        length= DBL_DIG+7; /* -[digits].E+### */
      }
      else
        length= FLT_DIG+6; /* -[digits].E+## */
      decimals= NOT_FIXED_DEC;
      break;
    }
    if (!fld_length && !fld_decimals)
    {
      length=  FLT_DIG+6;
      decimals= NOT_FIXED_DEC;
    }
    if (length < decimals &&
        decimals != NOT_FIXED_DEC)
    {
      my_error(ER_M_BIGGER_THAN_D, MYF(0), fld_name);
      DBUG_RETURN(TRUE);
    }
    break;
  case FIELD_TYPE_DOUBLE:
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    if (!fld_length && !fld_decimals)
    {
      length= DBL_DIG+7;
      decimals= NOT_FIXED_DEC;
    }
    if (length < decimals &&
        decimals != NOT_FIXED_DEC)
    {
      my_error(ER_M_BIGGER_THAN_D, MYF(0), fld_name);
      DBUG_RETURN(TRUE);
    }
    break;
  case FIELD_TYPE_TIMESTAMP:
    if (!fld_length)
      length= 14;  /* Full date YYYYMMDDHHMMSS */
    else if (length != 19)
    {
      /*
        We support only even TIMESTAMP lengths less or equal than 14
        and 19 as length of 4.1 compatible representation.
      */
      length= ((length+1)/2)*2; /* purecov: inspected */
      length= min(length,14); /* purecov: inspected */
    }
    flags|= ZEROFILL_FLAG | UNSIGNED_FLAG;
    if (fld_default_value)
    {
      /* Grammar allows only NOW() value for ON UPDATE clause */
      if (fld_default_value->type() == Item::FUNC_ITEM && 
          ((Item_func*)fld_default_value)->functype() == Item_func::NOW_FUNC)
      {
        unireg_check= (fld_on_update_value ? Field::TIMESTAMP_DNUN_FIELD:
                                             Field::TIMESTAMP_DN_FIELD);
        /*
          We don't need default value any longer moreover it is dangerous.
          Everything handled by unireg_check further.
        */
        def= 0;
      }
      else
        unireg_check= (fld_on_update_value ? Field::TIMESTAMP_UN_FIELD:
                                             Field::NONE);
    }
    else
    {
      /*
        If we have default TIMESTAMP NOT NULL column without explicit DEFAULT
        or ON UPDATE values then for the sake of compatiblity we should treat
        this column as having DEFAULT NOW() ON UPDATE NOW() (when we don't
        have another TIMESTAMP column with auto-set option before this one)
        or DEFAULT 0 (in other cases).
        So here we are setting TIMESTAMP_OLD_FIELD only temporary, and will
        replace this value by TIMESTAMP_DNUN_FIELD or NONE later when
        information about all TIMESTAMP fields in table will be availiable.

        If we have TIMESTAMP NULL column without explicit DEFAULT value
        we treat it as having DEFAULT NULL attribute.
      */
      unireg_check= (fld_on_update_value ? Field::TIMESTAMP_UN_FIELD :
                     (flags & NOT_NULL_FLAG ? Field::TIMESTAMP_OLD_FIELD :
                                              Field::NONE));
    }
    break;
  case FIELD_TYPE_DATE:
    /* Old date type. */
    if (protocol_version != PROTOCOL_VERSION-1)
      sql_type= FIELD_TYPE_NEWDATE;
    /* fall trough */
  case FIELD_TYPE_NEWDATE:
    length= 10;
    break;
  case FIELD_TYPE_TIME:
    length= 10;
    break;
  case FIELD_TYPE_DATETIME:
    length= 19;
    break;
  case FIELD_TYPE_SET:
    {
      if (fld_interval_list->elements > sizeof(longlong)*8)
      {
        my_error(ER_TOO_BIG_SET, MYF(0), fld_name); /* purecov: inspected */
        DBUG_RETURN(TRUE);
      }
      pack_length= get_set_pack_length(fld_interval_list->elements);

      List_iterator<String> it(*fld_interval_list);
      String *tmp;
      while ((tmp= it++))
        interval_list.push_back(tmp);
      /*
        Set fake length to 1 to pass the below conditions.
        Real length will be set in mysql_prepare_table()
        when we know the character set of the column
      */
      length= 1;
      break;
    }
  case FIELD_TYPE_ENUM:
    {
      /* Should be safe. */
      pack_length= get_enum_pack_length(fld_interval_list->elements);

      List_iterator<String> it(*fld_interval_list);
      String *tmp;
      while ((tmp= it++))
        interval_list.push_back(tmp);
      length= 1; /* See comment for FIELD_TYPE_SET above. */
      break;
   }
  case MYSQL_TYPE_VAR_STRING:
    DBUG_ASSERT(0);  /* Impossible. */
    break;
  case MYSQL_TYPE_BIT:
    {
      if (!fld_length)
        length= 1;
      if (length > MAX_BIT_FIELD_LENGTH)
      {
        my_error(ER_TOO_BIG_DISPLAYWIDTH, MYF(0), fld_name,
                 MAX_BIT_FIELD_LENGTH);
        DBUG_RETURN(TRUE);
      }
      pack_length= (length + 7) / 8;
      break;
    }
  case FIELD_TYPE_DECIMAL:
    DBUG_ASSERT(0); /* Was obsolete */
  }
  /* Remember the value of length */
  char_length= length;

  if (!(flags & BLOB_FLAG) &&
      ((length > max_field_charlength && fld_type != FIELD_TYPE_SET &&
        fld_type != FIELD_TYPE_ENUM &&
        (fld_type != MYSQL_TYPE_VARCHAR || fld_default_value)) ||
       (!length &&
        fld_type != MYSQL_TYPE_STRING &&
        fld_type != MYSQL_TYPE_VARCHAR && fld_type != FIELD_TYPE_GEOMETRY)))
  {
    my_error((fld_type == MYSQL_TYPE_VAR_STRING ||
              fld_type == MYSQL_TYPE_VARCHAR ||
              fld_type == MYSQL_TYPE_STRING) ?  ER_TOO_BIG_FIELDLENGTH :
                                                ER_TOO_BIG_DISPLAYWIDTH,
              MYF(0),
              fld_name, max_field_charlength); /* purecov: inspected */
    DBUG_RETURN(TRUE);
  }
  fld_type_modifier&= AUTO_INCREMENT_FLAG;
  if ((~allowed_type_modifier) & fld_type_modifier)
  {
    my_error(ER_WRONG_FIELD_SPEC, MYF(0), fld_name);
    DBUG_RETURN(TRUE);
  }

  DBUG_RETURN(FALSE); /* success */
}


enum_field_types get_blob_type_from_length(ulong length)
{
  enum_field_types type;
  if (length < 256)
    type= FIELD_TYPE_TINY_BLOB;
  else if (length < 65536)
    type= FIELD_TYPE_BLOB;
  else if (length < 256L*256L*256L)
    type= FIELD_TYPE_MEDIUM_BLOB;
  else
    type= FIELD_TYPE_LONG_BLOB;
  return type;
}


/*
  Make a field from the .frm file info
*/

uint32 calc_pack_length(enum_field_types type,uint32 length)
{
  switch (type) {
  case MYSQL_TYPE_VAR_STRING:
  case MYSQL_TYPE_STRING:
  case FIELD_TYPE_DECIMAL:     return (length);
  case MYSQL_TYPE_VARCHAR:     return (length + (length < 256 ? 1: 2));
  case FIELD_TYPE_YEAR:
  case FIELD_TYPE_TINY	: return 1;
  case FIELD_TYPE_SHORT : return 2;
  case FIELD_TYPE_INT24:
  case FIELD_TYPE_NEWDATE:
  case FIELD_TYPE_TIME:   return 3;
  case FIELD_TYPE_TIMESTAMP:
  case FIELD_TYPE_DATE:
  case FIELD_TYPE_LONG	: return 4;
  case FIELD_TYPE_FLOAT : return sizeof(float);
  case FIELD_TYPE_DOUBLE: return sizeof(double);
  case FIELD_TYPE_DATETIME:
  case FIELD_TYPE_LONGLONG: return 8;	/* Don't crash if no longlong */
  case FIELD_TYPE_NULL	: return 0;
  case FIELD_TYPE_TINY_BLOB:	return 1+portable_sizeof_char_ptr;
  case FIELD_TYPE_BLOB:		return 2+portable_sizeof_char_ptr;
  case FIELD_TYPE_MEDIUM_BLOB:	return 3+portable_sizeof_char_ptr;
  case FIELD_TYPE_LONG_BLOB:	return 4+portable_sizeof_char_ptr;
  case FIELD_TYPE_GEOMETRY:	return 4+portable_sizeof_char_ptr;
  case FIELD_TYPE_SET:
  case FIELD_TYPE_ENUM:
  case FIELD_TYPE_NEWDECIMAL:
    abort(); return 0;                          // This shouldn't happen
  case FIELD_TYPE_BIT: return length / 8;
  default:
    return 0;
  }
}


uint pack_length_to_packflag(uint type)
{
  switch (type) {
    case 1: return f_settype((uint) FIELD_TYPE_TINY);
    case 2: return f_settype((uint) FIELD_TYPE_SHORT);
    case 3: return f_settype((uint) FIELD_TYPE_INT24);
    case 4: return f_settype((uint) FIELD_TYPE_LONG);
    case 8: return f_settype((uint) FIELD_TYPE_LONGLONG);
  }
  return 0;					// This shouldn't happen
}


Field *make_field(char *ptr, uint32 field_length,
		  uchar *null_pos, uchar null_bit,
		  uint pack_flag,
		  enum_field_types field_type,
		  CHARSET_INFO *field_charset,
		  Field::geometry_type geom_type,
		  Field::utype unireg_check,
		  TYPELIB *interval,
		  const char *field_name,
		  struct st_table *table)
{
  uchar *bit_ptr;
  uchar bit_offset;
  LINT_INIT(bit_ptr);
  LINT_INIT(bit_offset);
  if (field_type == FIELD_TYPE_BIT && !f_bit_as_char(pack_flag))
  {
    bit_ptr= null_pos;
    bit_offset= null_bit;
    if (f_maybe_null(pack_flag))         // if null field
    {
       bit_ptr+= (null_bit == 7);        // shift bit_ptr and bit_offset
       bit_offset= (bit_offset + 1) & 7;
    }
  }

  if (!f_maybe_null(pack_flag))
  {
    null_pos=0;
    null_bit=0;
  }
  else
  {
    null_bit= ((uchar) 1) << null_bit;
  }

  switch (field_type)
  {
    case FIELD_TYPE_DATE:
    case FIELD_TYPE_NEWDATE:
    case FIELD_TYPE_TIME:
    case FIELD_TYPE_DATETIME:
    case FIELD_TYPE_TIMESTAMP:
      field_charset= &my_charset_bin;
    default: break;
  }

  if (f_is_alpha(pack_flag))
  {
    if (!f_is_packed(pack_flag))
    {
      if (field_type == MYSQL_TYPE_STRING ||
          field_type == FIELD_TYPE_DECIMAL ||   // 3.23 or 4.0 string
          field_type == MYSQL_TYPE_VAR_STRING)
        return new Field_string(ptr,field_length,null_pos,null_bit,
                                unireg_check, field_name, table,
                                field_charset);
      if (field_type == MYSQL_TYPE_VARCHAR)
        return new Field_varstring(ptr,field_length,
                                   HA_VARCHAR_PACKLENGTH(field_length),
                                   null_pos,null_bit,
                                   unireg_check, field_name, table,
                                   field_charset);
      return 0;                                 // Error
    }

    uint pack_length=calc_pack_length((enum_field_types)
				      f_packtype(pack_flag),
				      field_length);

#ifdef HAVE_SPATIAL
    if (f_is_geom(pack_flag))
      return new Field_geom(ptr,null_pos,null_bit,
			    unireg_check, field_name, table,
			    pack_length, geom_type);
#endif
    if (f_is_blob(pack_flag))
      return new Field_blob(ptr,null_pos,null_bit,
			    unireg_check, field_name, table,
			    pack_length, field_charset);
    if (interval)
    {
      if (f_is_enum(pack_flag))
	return new Field_enum(ptr,field_length,null_pos,null_bit,
				  unireg_check, field_name, table,
				  pack_length, interval, field_charset);
      else
	return new Field_set(ptr,field_length,null_pos,null_bit,
			     unireg_check, field_name, table,
			     pack_length, interval, field_charset);
    }
  }

  switch (field_type) {
  case FIELD_TYPE_DECIMAL:
    return new Field_decimal(ptr,field_length,null_pos,null_bit,
			     unireg_check, field_name, table,
			     f_decimals(pack_flag),
			     f_is_zerofill(pack_flag) != 0,
			     f_is_dec(pack_flag) == 0);
  case FIELD_TYPE_NEWDECIMAL:
    return new Field_new_decimal(ptr,field_length,null_pos,null_bit,
                                 unireg_check, field_name, table,
                                 f_decimals(pack_flag),
                                 f_is_zerofill(pack_flag) != 0,
                                 f_is_dec(pack_flag) == 0);
  case FIELD_TYPE_FLOAT:
    return new Field_float(ptr,field_length,null_pos,null_bit,
			   unireg_check, field_name, table,
			   f_decimals(pack_flag),
			   f_is_zerofill(pack_flag) != 0,
			   f_is_dec(pack_flag)== 0);
  case FIELD_TYPE_DOUBLE:
    return new Field_double(ptr,field_length,null_pos,null_bit,
			    unireg_check, field_name, table,
			    f_decimals(pack_flag),
			    f_is_zerofill(pack_flag) != 0,
			    f_is_dec(pack_flag)== 0);
  case FIELD_TYPE_TINY:
    return new Field_tiny(ptr,field_length,null_pos,null_bit,
			  unireg_check, field_name, table,
			  f_is_zerofill(pack_flag) != 0,
			  f_is_dec(pack_flag) == 0);
  case FIELD_TYPE_SHORT:
    return new Field_short(ptr,field_length,null_pos,null_bit,
			   unireg_check, field_name, table,
			   f_is_zerofill(pack_flag) != 0,
			   f_is_dec(pack_flag) == 0);
  case FIELD_TYPE_INT24:
    return new Field_medium(ptr,field_length,null_pos,null_bit,
			    unireg_check, field_name, table,
			    f_is_zerofill(pack_flag) != 0,
			    f_is_dec(pack_flag) == 0);
  case FIELD_TYPE_LONG:
    return new Field_long(ptr,field_length,null_pos,null_bit,
			   unireg_check, field_name, table,
			   f_is_zerofill(pack_flag) != 0,
			   f_is_dec(pack_flag) == 0);
  case FIELD_TYPE_LONGLONG:
    return new Field_longlong(ptr,field_length,null_pos,null_bit,
			      unireg_check, field_name, table,
			      f_is_zerofill(pack_flag) != 0,
			      f_is_dec(pack_flag) == 0);
  case FIELD_TYPE_TIMESTAMP:
    return new Field_timestamp(ptr,field_length, null_pos, null_bit,
                               unireg_check, field_name, table,
                               field_charset);
  case FIELD_TYPE_YEAR:
    return new Field_year(ptr,field_length,null_pos,null_bit,
			  unireg_check, field_name, table);
  case FIELD_TYPE_DATE:
    return new Field_date(ptr,null_pos,null_bit,
			  unireg_check, field_name, table, field_charset);
  case FIELD_TYPE_NEWDATE:
    return new Field_newdate(ptr,null_pos,null_bit,
			     unireg_check, field_name, table, field_charset);
  case FIELD_TYPE_TIME:
    return new Field_time(ptr,null_pos,null_bit,
			  unireg_check, field_name, table, field_charset);
  case FIELD_TYPE_DATETIME:
    return new Field_datetime(ptr,null_pos,null_bit,
			      unireg_check, field_name, table, field_charset);
  case FIELD_TYPE_NULL:
    return new Field_null(ptr,field_length,unireg_check,field_name,table, field_charset);
  case FIELD_TYPE_BIT:
    return f_bit_as_char(pack_flag) ?
           new Field_bit_as_char(ptr, field_length, null_pos, null_bit,
                                 unireg_check, field_name, table) :
           new Field_bit(ptr, field_length, null_pos, null_bit, bit_ptr,
                         bit_offset, unireg_check, field_name, table);
  default:					// Impossible (Wrong version)
    break;
  }
  return 0;
}


/* Create a field suitable for create of table */

create_field::create_field(Field *old_field,Field *orig_field)
{
  field=      old_field;
  field_name=change=old_field->field_name;
  length=     old_field->field_length;
  flags=      old_field->flags;
  unireg_check=old_field->unireg_check;
  pack_length=old_field->pack_length();
  key_length= old_field->key_length();
  sql_type=   old_field->real_type();
  charset=    old_field->charset();		// May be NULL ptr
  comment=    old_field->comment;
  decimals=   old_field->decimals();

  /* Fix if the original table had 4 byte pointer blobs */
  if (flags & BLOB_FLAG)
    pack_length= (pack_length- old_field->table->s->blob_ptr_size +
		  portable_sizeof_char_ptr);

  switch (sql_type) {
  case FIELD_TYPE_BLOB:
    switch (pack_length - portable_sizeof_char_ptr) {
    case  1: sql_type= FIELD_TYPE_TINY_BLOB; break;
    case  2: sql_type= FIELD_TYPE_BLOB; break;
    case  3: sql_type= FIELD_TYPE_MEDIUM_BLOB; break;
    default: sql_type= FIELD_TYPE_LONG_BLOB; break;
    }
    length/= charset->mbmaxlen;
    key_length/= charset->mbmaxlen;
    break;
  case MYSQL_TYPE_STRING:
    /* Change CHAR -> VARCHAR if dynamic record length */
    if (old_field->type() == MYSQL_TYPE_VAR_STRING)
      sql_type= MYSQL_TYPE_VARCHAR;
    /* fall through */

  case MYSQL_TYPE_ENUM:
  case MYSQL_TYPE_SET:
  case MYSQL_TYPE_VARCHAR:
  case MYSQL_TYPE_VAR_STRING:
    /* This is corrected in create_length_to_internal_length */
    length= (length+charset->mbmaxlen-1) / charset->mbmaxlen;
    break;
#ifdef HAVE_SPATIAL
  case FIELD_TYPE_GEOMETRY:
    geom_type= ((Field_geom*)old_field)->geom_type;
    break;
#endif
  default:
    break;
  }

  if (flags & (ENUM_FLAG | SET_FLAG))
    interval= ((Field_enum*) old_field)->typelib;
  else
    interval=0;
  def=0;
  char_length= length;

  if (!(flags & (NO_DEFAULT_VALUE_FLAG | BLOB_FLAG)) &&
      old_field->ptr && orig_field &&
      (sql_type != FIELD_TYPE_TIMESTAMP ||                /* set def only if */
       old_field->table->timestamp_field != old_field ||  /* timestamp field */ 
       unireg_check == Field::TIMESTAMP_UN_FIELD))        /* has default val */
  {
    my_ptrdiff_t diff;

    /* Get the value from default_values */
    diff= (my_ptrdiff_t) (orig_field->table->s->default_values-
                          orig_field->table->record[0]);
    orig_field->move_field(diff);		// Points now at default_values
    if (!orig_field->is_real_null())
    {
      char buff[MAX_FIELD_WIDTH],*pos;
      String tmp(buff,sizeof(buff), charset), *res;
      res= orig_field->val_str(&tmp);
      pos= (char*) sql_strmake(res->ptr(), res->length());
      def= new Item_string(pos, res->length(), charset);
    }
    orig_field->move_field(-diff);		// Back to record[0]
  }
}


/*
  maximum possible display length for blob

  SYNOPSIS
    Field_blob::max_length()

  RETURN
    length
*/
uint32 Field_blob::max_length()
{
  switch (packlength)
  {
  case 1:
    return 255 * field_charset->mbmaxlen;
  case 2:
    return 65535 * field_charset->mbmaxlen;
  case 3:
    return 16777215 * field_charset->mbmaxlen;
  case 4:
    return (uint32) 4294967295U;
  default:
    DBUG_ASSERT(0); // we should never go here
    return 0;
  }
}


/*****************************************************************************
 Warning handling
*****************************************************************************/

/*
  Produce warning or note about data saved into field

  SYNOPSIS
    set_warning()
      level            - level of message (Note/Warning/Error)
      code             - error code of message to be produced
      cuted_increment  - whenever we should increase cut fields count or not

  NOTE
    This function won't produce warning and increase cut fields counter
    if count_cuted_fields == FIELD_CHECK_IGNORE for current thread.

  RETURN VALUE
    1 if count_cuted_fields == FIELD_CHECK_IGNORE
    0 otherwise
*/

bool 
Field::set_warning(MYSQL_ERROR::enum_warning_level level, uint code,
                   int cuted_increment)
{
  /*
    If this field was created only for type conversion purposes it
    will have table == NULL.
  */
  THD *thd= table ? table->in_use : current_thd;
  if (thd->count_cuted_fields)
  {
    thd->cuted_fields+= cuted_increment;
    push_warning_printf(thd, level, code, ER(code), field_name,
                        thd->row_count);
    return 0;
  }
  return 1;
}


/*
  Produce warning or note about datetime string data saved into field

  SYNOPSIS
    set_datime_warning()
      level            - level of message (Note/Warning/Error)
      code             - error code of message to be produced
      str              - string value which we tried to save
      str_len          - length of string which we tried to save
      ts_type          - type of datetime value (datetime/date/time)
      cuted_increment  - whenever we should increase cut fields count or not
  
  NOTE
    This function will always produce some warning but won't increase cut 
    fields counter if count_cuted_fields == FIELD_CHECK_IGNORE for current 
    thread.
*/

void 
Field::set_datetime_warning(MYSQL_ERROR::enum_warning_level level, uint code, 
                            const char *str, uint str_length, 
                            timestamp_type ts_type, int cuted_increment)
{
  THD *thd= table ? table->in_use : current_thd;
  if (thd->really_abort_on_warning() ||
      set_warning(level, code, cuted_increment))
    make_truncated_value_warning(thd, str, str_length, ts_type,
                                 field_name);
}


/*
  Produce warning or note about integer datetime value saved into field

  SYNOPSIS
    set_warning()
      level            - level of message (Note/Warning/Error)
      code             - error code of message to be produced
      nr               - numeric value which we tried to save
      ts_type          - type of datetime value (datetime/date/time)
      cuted_increment  - whenever we should increase cut fields count or not
  
  NOTE
    This function will always produce some warning but won't increase cut 
    fields counter if count_cuted_fields == FIELD_CHECK_IGNORE for current 
    thread.
*/

void 
Field::set_datetime_warning(MYSQL_ERROR::enum_warning_level level, uint code, 
                            longlong nr, timestamp_type ts_type,
                            int cuted_increment)
{
  THD *thd= table ? table->in_use : current_thd;
  if (thd->really_abort_on_warning() ||
      set_warning(level, code, cuted_increment))
  {
    char str_nr[22];
    char *str_end= longlong10_to_str(nr, str_nr, -10);
    make_truncated_value_warning(thd, str_nr, (uint) (str_end - str_nr), 
                                 ts_type, field_name);
  }
}


/*
  Produce warning or note about double datetime data saved into field

  SYNOPSIS
    set_warning()
      level            - level of message (Note/Warning/Error)
      code             - error code of message to be produced
      nr               - double value which we tried to save
      ts_type          - type of datetime value (datetime/date/time)
  
  NOTE
    This function will always produce some warning but won't increase cut 
    fields counter if count_cuted_fields == FIELD_CHECK_IGNORE for current 
    thread.
*/

void 
Field::set_datetime_warning(MYSQL_ERROR::enum_warning_level level, uint code, 
                            double nr, timestamp_type ts_type)
{
  THD *thd= table ? table->in_use : current_thd;
  if (thd->really_abort_on_warning() ||
      set_warning(level, code, 1))
  {
    /* DBL_DIG is enough to print '-[digits].E+###' */
    char str_nr[DBL_DIG + 8];
    uint str_len= my_sprintf(str_nr, (str_nr, "%g", nr));
    make_truncated_value_warning(thd, str_nr, str_len, ts_type,
                                 field_name);
  }
}