item_create.cc 113 KB
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/* Copyright (C) 2000-2003 MySQL AB
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   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
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   the Free Software Foundation; version 2 of the License.
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   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.
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   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 */

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/**
  @file

  @brief
  Functions to create an item. Used by sql_yac.yy
*/
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#include "mysql_priv.h"
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#include "item_create.h"
#include "sp_head.h"
#include "sp.h"

/*
=============================================================================
  LOCAL DECLARATIONS
=============================================================================
*/

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/**
  Adapter for native functions with a variable number of arguments.
  The main use of this class is to discard the following calls:
  <code>foo(expr1 AS name1, expr2 AS name2, ...)</code>
  which are syntactically correct (the syntax can refer to a UDF),
  but semantically invalid for native functions.
*/

class Create_native_func : public Create_func
{
public:
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  virtual Item *create(THD *thd, LEX_STRING name, List<Item> *item_list);
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  /**
    Builder method, with no arguments.
    @param thd The current thread
    @param name The native function name
    @param item_list The function parameters, none of which are named
    @return An item representing the function call
  */
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  virtual Item *create_native(THD *thd, LEX_STRING name,
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                              List<Item> *item_list) = 0;

protected:
  /** Constructor. */
  Create_native_func() {}
  /** Destructor. */
  virtual ~Create_native_func() {}
};


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/**
  Adapter for functions that takes exactly zero arguments.
*/

class Create_func_arg0 : public Create_func
{
public:
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  virtual Item *create(THD *thd, LEX_STRING name, List<Item> *item_list);
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  /**
    Builder method, with no arguments.
    @param thd The current thread
    @return An item representing the function call
  */
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  virtual Item *create(THD *thd) = 0;
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protected:
  /** Constructor. */
  Create_func_arg0() {}
  /** Destructor. */
  virtual ~Create_func_arg0() {}
};


/**
  Adapter for functions that takes exactly one argument.
*/

class Create_func_arg1 : public Create_func
{
public:
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  virtual Item *create(THD *thd, LEX_STRING name, List<Item> *item_list);
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  /**
    Builder method, with one argument.
    @param thd The current thread
    @param arg1 The first argument of the function
    @return An item representing the function call
  */
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  virtual Item *create(THD *thd, Item *arg1) = 0;
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protected:
  /** Constructor. */
  Create_func_arg1() {}
  /** Destructor. */
  virtual ~Create_func_arg1() {}
};


/**
  Adapter for functions that takes exactly two arguments.
*/

class Create_func_arg2 : public Create_func
{
public:
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  virtual Item *create(THD *thd, LEX_STRING name, List<Item> *item_list);
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  /**
    Builder method, with two arguments.
    @param thd The current thread
    @param arg1 The first argument of the function
    @param arg2 The second argument of the function
    @return An item representing the function call
  */
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2) = 0;
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protected:
  /** Constructor. */
  Create_func_arg2() {}
  /** Destructor. */
  virtual ~Create_func_arg2() {}
};


/**
  Adapter for functions that takes exactly three arguments.
*/

class Create_func_arg3 : public Create_func
{
public:
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  virtual Item *create(THD *thd, LEX_STRING name, List<Item> *item_list);
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  /**
    Builder method, with three arguments.
    @param thd The current thread
    @param arg1 The first argument of the function
    @param arg2 The second argument of the function
    @param arg3 The third argument of the function
    @return An item representing the function call
  */
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2, Item *arg3) = 0;
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protected:
  /** Constructor. */
  Create_func_arg3() {}
  /** Destructor. */
  virtual ~Create_func_arg3() {}
};


/**
  Function builder for Stored Functions.
*/

class Create_sp_func : public Create_qfunc
{
public:
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  virtual Item *create(THD *thd, LEX_STRING db, LEX_STRING name,
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                       bool use_explicit_name, List<Item> *item_list);
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  static Create_sp_func s_singleton;

protected:
  /** Constructor. */
  Create_sp_func() {}
  /** Destructor. */
  virtual ~Create_sp_func() {}
};
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#ifndef HAVE_SPATIAL
/**
  Common (non) builder for geometry functions.
  This builder is used in <code>--without-geometry</code> builds only,
  to report an error.
*/

class Create_func_no_geom : public Create_func
{
public:
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  virtual Item *create(THD *thd, LEX_STRING name, List<Item> *item_list);
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  /** Singleton. */
  static Create_func_no_geom s_singleton;

protected:
  /** Constructor. */
  Create_func_no_geom() {}
  /** Destructor. */
  virtual ~Create_func_no_geom() {}
};
#endif


/*
  Concrete functions builders (native functions).
  Please keep this list sorted in alphabetical order,
  it helps to compare code between versions, and helps with merges conflicts.
*/

class Create_func_abs : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_abs s_singleton;

protected:
  Create_func_abs() {}
  virtual ~Create_func_abs() {}
};


class Create_func_acos : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_acos s_singleton;

protected:
  Create_func_acos() {}
  virtual ~Create_func_acos() {}
};


class Create_func_addtime : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_addtime s_singleton;

protected:
  Create_func_addtime() {}
  virtual ~Create_func_addtime() {}
};


class Create_func_aes_encrypt : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_aes_encrypt s_singleton;

protected:
  Create_func_aes_encrypt() {}
  virtual ~Create_func_aes_encrypt() {}
};


class Create_func_aes_decrypt : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_aes_decrypt s_singleton;

protected:
  Create_func_aes_decrypt() {}
  virtual ~Create_func_aes_decrypt() {}
};


#ifdef HAVE_SPATIAL
class Create_func_area : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_area s_singleton;

protected:
  Create_func_area() {}
  virtual ~Create_func_area() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_as_wkb : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_as_wkb s_singleton;

protected:
  Create_func_as_wkb() {}
  virtual ~Create_func_as_wkb() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_as_wkt : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_as_wkt s_singleton;

protected:
  Create_func_as_wkt() {}
  virtual ~Create_func_as_wkt() {}
};
#endif


class Create_func_asin : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_asin s_singleton;

protected:
  Create_func_asin() {}
  virtual ~Create_func_asin() {}
};


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class Create_func_atan : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_atan s_singleton;

protected:
  Create_func_atan() {}
  virtual ~Create_func_atan() {}
};


class Create_func_benchmark : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_benchmark s_singleton;

protected:
  Create_func_benchmark() {}
  virtual ~Create_func_benchmark() {}
};


class Create_func_bin : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_bin s_singleton;

protected:
  Create_func_bin() {}
  virtual ~Create_func_bin() {}
};


class Create_func_bit_count : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_bit_count s_singleton;

protected:
  Create_func_bit_count() {}
  virtual ~Create_func_bit_count() {}
};


class Create_func_bit_length : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_bit_length s_singleton;

protected:
  Create_func_bit_length() {}
  virtual ~Create_func_bit_length() {}
};


class Create_func_ceiling : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_ceiling s_singleton;

protected:
  Create_func_ceiling() {}
  virtual ~Create_func_ceiling() {}
};


#ifdef HAVE_SPATIAL
class Create_func_centroid : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_centroid s_singleton;

protected:
  Create_func_centroid() {}
  virtual ~Create_func_centroid() {}
};
#endif


class Create_func_char_length : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_char_length s_singleton;

protected:
  Create_func_char_length() {}
  virtual ~Create_func_char_length() {}
};


class Create_func_coercibility : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_coercibility s_singleton;

protected:
  Create_func_coercibility() {}
  virtual ~Create_func_coercibility() {}
};


class Create_func_compress : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_compress s_singleton;

protected:
  Create_func_compress() {}
  virtual ~Create_func_compress() {}
};


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class Create_func_concat : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_concat s_singleton;

protected:
  Create_func_concat() {}
  virtual ~Create_func_concat() {}
};


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class Create_func_concat_ws : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_concat_ws s_singleton;

protected:
  Create_func_concat_ws() {}
  virtual ~Create_func_concat_ws() {}
};


class Create_func_connection_id : public Create_func_arg0
{
public:
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  virtual Item *create(THD *thd);
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  static Create_func_connection_id s_singleton;

protected:
  Create_func_connection_id() {}
  virtual ~Create_func_connection_id() {}
};


#ifdef HAVE_SPATIAL
class Create_func_contains : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_contains s_singleton;

protected:
  Create_func_contains() {}
  virtual ~Create_func_contains() {}
};
#endif


class Create_func_conv : public Create_func_arg3
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2, Item *arg3);
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  static Create_func_conv s_singleton;

protected:
  Create_func_conv() {}
  virtual ~Create_func_conv() {}
};


class Create_func_convert_tz : public Create_func_arg3
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2, Item *arg3);
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  static Create_func_convert_tz s_singleton;

protected:
  Create_func_convert_tz() {}
  virtual ~Create_func_convert_tz() {}
};


class Create_func_cos : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_cos s_singleton;

protected:
  Create_func_cos() {}
  virtual ~Create_func_cos() {}
};


class Create_func_cot : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_cot s_singleton;

protected:
  Create_func_cot() {}
  virtual ~Create_func_cot() {}
};


class Create_func_crc32 : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_crc32 s_singleton;

protected:
  Create_func_crc32() {}
  virtual ~Create_func_crc32() {}
};


#ifdef HAVE_SPATIAL
class Create_func_crosses : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_crosses s_singleton;

protected:
  Create_func_crosses() {}
  virtual ~Create_func_crosses() {}
};
#endif


class Create_func_date_format : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_date_format s_singleton;

protected:
  Create_func_date_format() {}
  virtual ~Create_func_date_format() {}
};


class Create_func_datediff : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_datediff s_singleton;

protected:
  Create_func_datediff() {}
  virtual ~Create_func_datediff() {}
};


class Create_func_dayname : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_dayname s_singleton;

protected:
  Create_func_dayname() {}
  virtual ~Create_func_dayname() {}
};


class Create_func_dayofmonth : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_dayofmonth s_singleton;

protected:
  Create_func_dayofmonth() {}
  virtual ~Create_func_dayofmonth() {}
};


class Create_func_dayofweek : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_dayofweek s_singleton;

protected:
  Create_func_dayofweek() {}
  virtual ~Create_func_dayofweek() {}
};


class Create_func_dayofyear : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_dayofyear s_singleton;

protected:
  Create_func_dayofyear() {}
  virtual ~Create_func_dayofyear() {}
};


class Create_func_decode : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_decode s_singleton;

protected:
  Create_func_decode() {}
  virtual ~Create_func_decode() {}
};


class Create_func_degrees : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_degrees s_singleton;

protected:
  Create_func_degrees() {}
  virtual ~Create_func_degrees() {}
};


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class Create_func_des_decrypt : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_des_decrypt s_singleton;

protected:
  Create_func_des_decrypt() {}
  virtual ~Create_func_des_decrypt() {}
};


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class Create_func_des_encrypt : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_des_encrypt s_singleton;

protected:
  Create_func_des_encrypt() {}
  virtual ~Create_func_des_encrypt() {}
};


#ifdef HAVE_SPATIAL
class Create_func_dimension : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_dimension s_singleton;

protected:
  Create_func_dimension() {}
  virtual ~Create_func_dimension() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_disjoint : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_disjoint s_singleton;

protected:
  Create_func_disjoint() {}
  virtual ~Create_func_disjoint() {}
};
#endif


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class Create_func_elt : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_elt s_singleton;

protected:
  Create_func_elt() {}
  virtual ~Create_func_elt() {}
};


class Create_func_encode : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_encode s_singleton;

protected:
  Create_func_encode() {}
  virtual ~Create_func_encode() {}
};


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class Create_func_encrypt : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_encrypt s_singleton;

protected:
  Create_func_encrypt() {}
  virtual ~Create_func_encrypt() {}
};


#ifdef HAVE_SPATIAL
class Create_func_endpoint : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_endpoint s_singleton;

protected:
  Create_func_endpoint() {}
  virtual ~Create_func_endpoint() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_envelope : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_envelope s_singleton;

protected:
  Create_func_envelope() {}
  virtual ~Create_func_envelope() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_equals : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_equals s_singleton;

protected:
  Create_func_equals() {}
  virtual ~Create_func_equals() {}
};
#endif


class Create_func_exp : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_exp s_singleton;

protected:
  Create_func_exp() {}
  virtual ~Create_func_exp() {}
};


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class Create_func_export_set : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_export_set s_singleton;

protected:
  Create_func_export_set() {}
  virtual ~Create_func_export_set() {}
};


#ifdef HAVE_SPATIAL
class Create_func_exteriorring : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_exteriorring s_singleton;

protected:
  Create_func_exteriorring() {}
  virtual ~Create_func_exteriorring() {}
};
#endif


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class Create_func_field : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_field s_singleton;

protected:
  Create_func_field() {}
  virtual ~Create_func_field() {}
};


class Create_func_find_in_set : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_find_in_set s_singleton;

protected:
  Create_func_find_in_set() {}
  virtual ~Create_func_find_in_set() {}
};


class Create_func_floor : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_floor s_singleton;

protected:
  Create_func_floor() {}
  virtual ~Create_func_floor() {}
};


class Create_func_format : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_format s_singleton;

protected:
  Create_func_format() {}
  virtual ~Create_func_format() {}
};


class Create_func_found_rows : public Create_func_arg0
{
public:
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  virtual Item *create(THD *thd);
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  static Create_func_found_rows s_singleton;

protected:
  Create_func_found_rows() {}
  virtual ~Create_func_found_rows() {}
};


class Create_func_from_days : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_from_days s_singleton;

protected:
  Create_func_from_days() {}
  virtual ~Create_func_from_days() {}
};


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class Create_func_from_unixtime : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_from_unixtime s_singleton;

protected:
  Create_func_from_unixtime() {}
  virtual ~Create_func_from_unixtime() {}
};


#ifdef HAVE_SPATIAL
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class Create_func_geometry_from_text : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_geometry_from_text s_singleton;

protected:
  Create_func_geometry_from_text() {}
  virtual ~Create_func_geometry_from_text() {}
};
#endif


#ifdef HAVE_SPATIAL
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class Create_func_geometry_from_wkb : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_geometry_from_wkb s_singleton;

protected:
  Create_func_geometry_from_wkb() {}
  virtual ~Create_func_geometry_from_wkb() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_geometry_type : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_geometry_type s_singleton;

protected:
  Create_func_geometry_type() {}
  virtual ~Create_func_geometry_type() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_geometryn : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_geometryn s_singleton;

protected:
  Create_func_geometryn() {}
  virtual ~Create_func_geometryn() {}
};
#endif


class Create_func_get_lock : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_get_lock s_singleton;

protected:
  Create_func_get_lock() {}
  virtual ~Create_func_get_lock() {}
};


#ifdef HAVE_SPATIAL
class Create_func_glength : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_glength s_singleton;

protected:
  Create_func_glength() {}
  virtual ~Create_func_glength() {}
};
#endif


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class Create_func_greatest : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_greatest s_singleton;

protected:
  Create_func_greatest() {}
  virtual ~Create_func_greatest() {}
};


class Create_func_hex : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_hex s_singleton;

protected:
  Create_func_hex() {}
  virtual ~Create_func_hex() {}
};


class Create_func_ifnull : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_ifnull s_singleton;

protected:
  Create_func_ifnull() {}
  virtual ~Create_func_ifnull() {}
};


class Create_func_inet_ntoa : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_inet_ntoa s_singleton;

protected:
  Create_func_inet_ntoa() {}
  virtual ~Create_func_inet_ntoa() {}
};


class Create_func_inet_aton : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_inet_aton s_singleton;

protected:
  Create_func_inet_aton() {}
  virtual ~Create_func_inet_aton() {}
};


class Create_func_instr : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_instr s_singleton;

protected:
  Create_func_instr() {}
  virtual ~Create_func_instr() {}
};


#ifdef HAVE_SPATIAL
class Create_func_interiorringn : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_interiorringn s_singleton;

protected:
  Create_func_interiorringn() {}
  virtual ~Create_func_interiorringn() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_intersects : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_intersects s_singleton;

protected:
  Create_func_intersects() {}
  virtual ~Create_func_intersects() {}
};
#endif


class Create_func_is_free_lock : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_is_free_lock s_singleton;

protected:
  Create_func_is_free_lock() {}
  virtual ~Create_func_is_free_lock() {}
};


class Create_func_is_used_lock : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_is_used_lock s_singleton;

protected:
  Create_func_is_used_lock() {}
  virtual ~Create_func_is_used_lock() {}
};


#ifdef HAVE_SPATIAL
class Create_func_isclosed : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_isclosed s_singleton;

protected:
  Create_func_isclosed() {}
  virtual ~Create_func_isclosed() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_isempty : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_isempty s_singleton;

protected:
  Create_func_isempty() {}
  virtual ~Create_func_isempty() {}
};
#endif


class Create_func_isnull : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_isnull s_singleton;

protected:
  Create_func_isnull() {}
  virtual ~Create_func_isnull() {}
};


#ifdef HAVE_SPATIAL
class Create_func_issimple : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_issimple s_singleton;

protected:
  Create_func_issimple() {}
  virtual ~Create_func_issimple() {}
};
#endif


class Create_func_last_day : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_last_day s_singleton;

protected:
  Create_func_last_day() {}
  virtual ~Create_func_last_day() {}
};


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class Create_func_last_insert_id : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_last_insert_id s_singleton;

protected:
  Create_func_last_insert_id() {}
  virtual ~Create_func_last_insert_id() {}
};


class Create_func_lcase : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_lcase s_singleton;

protected:
  Create_func_lcase() {}
  virtual ~Create_func_lcase() {}
};


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class Create_func_least : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_least s_singleton;

protected:
  Create_func_least() {}
  virtual ~Create_func_least() {}
};


class Create_func_length : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_length s_singleton;

protected:
  Create_func_length() {}
  virtual ~Create_func_length() {}
};


class Create_func_ln : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_ln s_singleton;

protected:
  Create_func_ln() {}
  virtual ~Create_func_ln() {}
};


class Create_func_load_file : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_load_file s_singleton;

protected:
  Create_func_load_file() {}
  virtual ~Create_func_load_file() {}
};


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class Create_func_locate : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_locate s_singleton;

protected:
  Create_func_locate() {}
  virtual ~Create_func_locate() {}
};


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class Create_func_log : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_log s_singleton;

protected:
  Create_func_log() {}
  virtual ~Create_func_log() {}
};


class Create_func_log10 : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_log10 s_singleton;

protected:
  Create_func_log10() {}
  virtual ~Create_func_log10() {}
};


class Create_func_log2 : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_log2 s_singleton;

protected:
  Create_func_log2() {}
  virtual ~Create_func_log2() {}
};


class Create_func_lpad : public Create_func_arg3
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2, Item *arg3);
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  static Create_func_lpad s_singleton;

protected:
  Create_func_lpad() {}
  virtual ~Create_func_lpad() {}
};


class Create_func_ltrim : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_ltrim s_singleton;

protected:
  Create_func_ltrim() {}
  virtual ~Create_func_ltrim() {}
};


class Create_func_makedate : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_makedate s_singleton;

protected:
  Create_func_makedate() {}
  virtual ~Create_func_makedate() {}
};


class Create_func_maketime : public Create_func_arg3
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2, Item *arg3);
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  static Create_func_maketime s_singleton;

protected:
  Create_func_maketime() {}
  virtual ~Create_func_maketime() {}
};


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class Create_func_make_set : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_make_set s_singleton;

protected:
  Create_func_make_set() {}
  virtual ~Create_func_make_set() {}
};


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class Create_func_master_pos_wait : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_master_pos_wait s_singleton;

protected:
  Create_func_master_pos_wait() {}
  virtual ~Create_func_master_pos_wait() {}
};


class Create_func_md5 : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_md5 s_singleton;

protected:
  Create_func_md5() {}
  virtual ~Create_func_md5() {}
};


class Create_func_monthname : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_monthname s_singleton;

protected:
  Create_func_monthname() {}
  virtual ~Create_func_monthname() {}
};


class Create_func_name_const : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_name_const s_singleton;

protected:
  Create_func_name_const() {}
  virtual ~Create_func_name_const() {}
};


class Create_func_nullif : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_nullif s_singleton;

protected:
  Create_func_nullif() {}
  virtual ~Create_func_nullif() {}
};


#ifdef HAVE_SPATIAL
class Create_func_numgeometries : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_numgeometries s_singleton;

protected:
  Create_func_numgeometries() {}
  virtual ~Create_func_numgeometries() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_numinteriorring : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_numinteriorring s_singleton;

protected:
  Create_func_numinteriorring() {}
  virtual ~Create_func_numinteriorring() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_numpoints : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_numpoints s_singleton;

protected:
  Create_func_numpoints() {}
  virtual ~Create_func_numpoints() {}
};
#endif


class Create_func_oct : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_oct s_singleton;

protected:
  Create_func_oct() {}
  virtual ~Create_func_oct() {}
};


class Create_func_ord : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_ord s_singleton;

protected:
  Create_func_ord() {}
  virtual ~Create_func_ord() {}
};


#ifdef HAVE_SPATIAL
class Create_func_overlaps : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_overlaps s_singleton;

protected:
  Create_func_overlaps() {}
  virtual ~Create_func_overlaps() {}
};
#endif


class Create_func_period_add : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_period_add s_singleton;

protected:
  Create_func_period_add() {}
  virtual ~Create_func_period_add() {}
};


class Create_func_period_diff : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_period_diff s_singleton;

protected:
  Create_func_period_diff() {}
  virtual ~Create_func_period_diff() {}
};


class Create_func_pi : public Create_func_arg0
{
public:
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  virtual Item *create(THD *thd);
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  static Create_func_pi s_singleton;

protected:
  Create_func_pi() {}
  virtual ~Create_func_pi() {}
};


#ifdef HAVE_SPATIAL
class Create_func_pointn : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_pointn s_singleton;

protected:
  Create_func_pointn() {}
  virtual ~Create_func_pointn() {}
};
#endif


class Create_func_pow : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_pow s_singleton;

protected:
  Create_func_pow() {}
  virtual ~Create_func_pow() {}
};


class Create_func_quote : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_quote s_singleton;

protected:
  Create_func_quote() {}
  virtual ~Create_func_quote() {}
};


class Create_func_radians : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_radians s_singleton;

protected:
  Create_func_radians() {}
  virtual ~Create_func_radians() {}
};


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class Create_func_rand : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_rand s_singleton;

protected:
  Create_func_rand() {}
  virtual ~Create_func_rand() {}
};


class Create_func_release_lock : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_release_lock s_singleton;

protected:
  Create_func_release_lock() {}
  virtual ~Create_func_release_lock() {}
};


class Create_func_reverse : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_reverse s_singleton;

protected:
  Create_func_reverse() {}
  virtual ~Create_func_reverse() {}
};


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class Create_func_round : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_round s_singleton;

protected:
  Create_func_round() {}
  virtual ~Create_func_round() {}
};


class Create_func_row_count : public Create_func_arg0
{
public:
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  virtual Item *create(THD *thd);
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  static Create_func_row_count s_singleton;

protected:
  Create_func_row_count() {}
  virtual ~Create_func_row_count() {}
};


class Create_func_rpad : public Create_func_arg3
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2, Item *arg3);
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  static Create_func_rpad s_singleton;

protected:
  Create_func_rpad() {}
  virtual ~Create_func_rpad() {}
};


class Create_func_rtrim : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_rtrim s_singleton;

protected:
  Create_func_rtrim() {}
  virtual ~Create_func_rtrim() {}
};


class Create_func_sec_to_time : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_sec_to_time s_singleton;

protected:
  Create_func_sec_to_time() {}
  virtual ~Create_func_sec_to_time() {}
};


class Create_func_sha : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_sha s_singleton;

protected:
  Create_func_sha() {}
  virtual ~Create_func_sha() {}
};


class Create_func_sign : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_sign s_singleton;

protected:
  Create_func_sign() {}
  virtual ~Create_func_sign() {}
};


class Create_func_sin : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_sin s_singleton;

protected:
  Create_func_sin() {}
  virtual ~Create_func_sin() {}
};


class Create_func_sleep : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_sleep s_singleton;

protected:
  Create_func_sleep() {}
  virtual ~Create_func_sleep() {}
};


class Create_func_soundex : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_soundex s_singleton;

protected:
  Create_func_soundex() {}
  virtual ~Create_func_soundex() {}
};


class Create_func_space : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_space s_singleton;

protected:
  Create_func_space() {}
  virtual ~Create_func_space() {}
};


class Create_func_sqrt : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_sqrt s_singleton;

protected:
  Create_func_sqrt() {}
  virtual ~Create_func_sqrt() {}
};


#ifdef HAVE_SPATIAL
class Create_func_srid : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_srid s_singleton;

protected:
  Create_func_srid() {}
  virtual ~Create_func_srid() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_startpoint : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_startpoint s_singleton;

protected:
  Create_func_startpoint() {}
  virtual ~Create_func_startpoint() {}
};
#endif


class Create_func_str_to_date : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_str_to_date s_singleton;

protected:
  Create_func_str_to_date() {}
  virtual ~Create_func_str_to_date() {}
};


class Create_func_strcmp : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_strcmp s_singleton;

protected:
  Create_func_strcmp() {}
  virtual ~Create_func_strcmp() {}
};


class Create_func_substr_index : public Create_func_arg3
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2, Item *arg3);
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  static Create_func_substr_index s_singleton;

protected:
  Create_func_substr_index() {}
  virtual ~Create_func_substr_index() {}
};


class Create_func_subtime : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_subtime s_singleton;

protected:
  Create_func_subtime() {}
  virtual ~Create_func_subtime() {}
};


class Create_func_tan : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_tan s_singleton;

protected:
  Create_func_tan() {}
  virtual ~Create_func_tan() {}
};


class Create_func_time_format : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_time_format s_singleton;

protected:
  Create_func_time_format() {}
  virtual ~Create_func_time_format() {}
};


class Create_func_time_to_sec : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_time_to_sec s_singleton;

protected:
  Create_func_time_to_sec() {}
  virtual ~Create_func_time_to_sec() {}
};


class Create_func_timediff : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_timediff s_singleton;

protected:
  Create_func_timediff() {}
  virtual ~Create_func_timediff() {}
};


class Create_func_to_days : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_to_days s_singleton;

protected:
  Create_func_to_days() {}
  virtual ~Create_func_to_days() {}
};


#ifdef HAVE_SPATIAL
class Create_func_touches : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_touches s_singleton;

protected:
  Create_func_touches() {}
  virtual ~Create_func_touches() {}
};
#endif


class Create_func_ucase : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_ucase s_singleton;

protected:
  Create_func_ucase() {}
  virtual ~Create_func_ucase() {}
};


class Create_func_uncompress : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_uncompress s_singleton;

protected:
  Create_func_uncompress() {}
  virtual ~Create_func_uncompress() {}
};


class Create_func_uncompressed_length : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_uncompressed_length s_singleton;

protected:
  Create_func_uncompressed_length() {}
  virtual ~Create_func_uncompressed_length() {}
};


class Create_func_unhex : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_unhex s_singleton;

protected:
  Create_func_unhex() {}
  virtual ~Create_func_unhex() {}
};


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class Create_func_unix_timestamp : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_unix_timestamp s_singleton;

protected:
  Create_func_unix_timestamp() {}
  virtual ~Create_func_unix_timestamp() {}
};


class Create_func_uuid : public Create_func_arg0
{
public:
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  virtual Item *create(THD *thd);
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  static Create_func_uuid s_singleton;

protected:
  Create_func_uuid() {}
  virtual ~Create_func_uuid() {}
};


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class Create_func_uuid_short : public Create_func_arg0
{
public:
  virtual Item *create(THD *thd);

  static Create_func_uuid_short s_singleton;

protected:
  Create_func_uuid_short() {}
  virtual ~Create_func_uuid_short() {}
};


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class Create_func_version : public Create_func_arg0
{
public:
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  virtual Item *create(THD *thd);
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  static Create_func_version s_singleton;

protected:
  Create_func_version() {}
  virtual ~Create_func_version() {}
};


class Create_func_weekday : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_weekday s_singleton;

protected:
  Create_func_weekday() {}
  virtual ~Create_func_weekday() {}
};


class Create_func_weekofyear : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_weekofyear s_singleton;

protected:
  Create_func_weekofyear() {}
  virtual ~Create_func_weekofyear() {}
};


#ifdef HAVE_SPATIAL
class Create_func_within : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_within s_singleton;

protected:
  Create_func_within() {}
  virtual ~Create_func_within() {}
};
#endif


#ifdef HAVE_SPATIAL
class Create_func_x : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_x s_singleton;

protected:
  Create_func_x() {}
  virtual ~Create_func_x() {}
};
#endif


class Create_func_xml_extractvalue : public Create_func_arg2
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
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  static Create_func_xml_extractvalue s_singleton;

protected:
  Create_func_xml_extractvalue() {}
  virtual ~Create_func_xml_extractvalue() {}
};


class Create_func_xml_update : public Create_func_arg3
{
public:
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  virtual Item *create(THD *thd, Item *arg1, Item *arg2, Item *arg3);
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  static Create_func_xml_update s_singleton;

protected:
  Create_func_xml_update() {}
  virtual ~Create_func_xml_update() {}
};


#ifdef HAVE_SPATIAL
class Create_func_y : public Create_func_arg1
{
public:
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  virtual Item *create(THD *thd, Item *arg1);
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  static Create_func_y s_singleton;

protected:
  Create_func_y() {}
  virtual ~Create_func_y() {}
};
#endif


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class Create_func_year_week : public Create_native_func
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{
public:
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  virtual Item *create_native(THD *thd, LEX_STRING name, List<Item> *item_list);
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  static Create_func_year_week s_singleton;

protected:
  Create_func_year_week() {}
  virtual ~Create_func_year_week() {}
};


/*
=============================================================================
  IMPLEMENTATION
=============================================================================
*/

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/**
  Checks if there are named parameters in a parameter list.
  The syntax to name parameters in a function call is as follow:
  <code>foo(expr AS named, expr named, expr AS "named", expr "named")</code>
  @param params The parameter list, can be null
  @return true if one or more parameter is named
*/
static bool has_named_parameters(List<Item> *params)
{
  if (params)
  {
    Item *param;
    List_iterator<Item> it(*params);
    while ((param= it++))
    {
      if (! param->is_autogenerated_name)
        return true;
    }
  }

  return false;
}

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#ifndef HAVE_SPATIAL
Create_func_no_geom Create_func_no_geom::s_singleton;

Item*
Create_func_no_geom::create(THD * /* unused */,
                            LEX_STRING /* unused */,
                            List<Item> * /* unused */)
{
  /* FIXME: error message can't be translated. */
  my_error(ER_FEATURE_DISABLED, MYF(0),
           sym_group_geom.name, sym_group_geom.needed_define);
  return NULL;
}
#endif


Item*
Create_qfunc::create(THD *thd, LEX_STRING name, List<Item> *item_list)
{
  LEX_STRING db;
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  if (! thd->db && ! thd->lex->sphead)
  {
    /*
      The proper error message should be in the lines of:
        Can't resolve <name>() to a function call,
        because this function:
        - is not a native function,
        - is not a user defined function,
        - can not match a qualified (read: stored) function
          since no database is selected.
      Reusing ER_SP_DOES_NOT_EXIST have a message consistent with
      the case when a default database exist, see Create_sp_func::create().
    */
    my_error(ER_SP_DOES_NOT_EXIST, MYF(0),
             "FUNCTION", name.str);
    return NULL;
  }

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  if (thd->lex->copy_db_to(&db.str, &db.length))
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    return NULL;

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  return create(thd, db, name, false, item_list);
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}


#ifdef HAVE_DLOPEN
Create_udf_func Create_udf_func::s_singleton;

Item*
Create_udf_func::create(THD *thd, LEX_STRING name, List<Item> *item_list)
{
  udf_func *udf= find_udf(name.str, name.length);
  DBUG_ASSERT(udf);
  return create(thd, udf, item_list);
}


Item*
Create_udf_func::create(THD *thd, udf_func *udf, List<Item> *item_list)
{
  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

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  thd->lex->set_stmt_unsafe();
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  DBUG_ASSERT(   (udf->type == UDFTYPE_FUNCTION)
              || (udf->type == UDFTYPE_AGGREGATE));

  switch(udf->returns) {
  case STRING_RESULT:
  {
    if (udf->type == UDFTYPE_FUNCTION)
    {
      if (arg_count)
        func= new (thd->mem_root) Item_func_udf_str(udf, *item_list);
      else
        func= new (thd->mem_root) Item_func_udf_str(udf);
    }
    else
    {
      if (arg_count)
        func= new (thd->mem_root) Item_sum_udf_str(udf, *item_list);
      else
        func= new (thd->mem_root) Item_sum_udf_str(udf);
    }
    break;
  }
  case REAL_RESULT:
  {
    if (udf->type == UDFTYPE_FUNCTION)
    {
      if (arg_count)
        func= new (thd->mem_root) Item_func_udf_float(udf, *item_list);
      else
        func= new (thd->mem_root) Item_func_udf_float(udf);
    }
    else
    {
      if (arg_count)
        func= new (thd->mem_root) Item_sum_udf_float(udf, *item_list);
      else
        func= new (thd->mem_root) Item_sum_udf_float(udf);
    }
    break;
  }
  case INT_RESULT:
  {
    if (udf->type == UDFTYPE_FUNCTION)
    {
      if (arg_count)
        func= new (thd->mem_root) Item_func_udf_int(udf, *item_list);
      else
        func= new (thd->mem_root) Item_func_udf_int(udf);
    }
    else
    {
      if (arg_count)
        func= new (thd->mem_root) Item_sum_udf_int(udf, *item_list);
      else
        func= new (thd->mem_root) Item_sum_udf_int(udf);
    }
    break;
  }
  case DECIMAL_RESULT:
  {
    if (udf->type == UDFTYPE_FUNCTION)
    {
      if (arg_count)
        func= new (thd->mem_root) Item_func_udf_decimal(udf, *item_list);
      else
        func= new (thd->mem_root) Item_func_udf_decimal(udf);
    }
    else
    {
      if (arg_count)
        func= new (thd->mem_root) Item_sum_udf_decimal(udf, *item_list);
      else
        func= new (thd->mem_root) Item_sum_udf_decimal(udf);
    }
    break;
  }
  default:
  {
    my_error(ER_NOT_SUPPORTED_YET, MYF(0), "UDF return type");
  }
  }
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  thd->lex->safe_to_cache_query= 0;
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  return func;
}
#endif


Create_sp_func Create_sp_func::s_singleton;

Item*
Create_sp_func::create(THD *thd, LEX_STRING db, LEX_STRING name,
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                       bool use_explicit_name, List<Item> *item_list)
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{
  int arg_count= 0;
  Item *func= NULL;
  LEX *lex= thd->lex;
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  sp_name *qname;

  if (has_named_parameters(item_list))
  {
    /*
      The syntax "db.foo(expr AS p1, expr AS p2, ...) is invalid,
      and has been rejected during syntactic parsing already,
      because a stored function call may not have named parameters.

      The syntax "foo(expr AS p1, expr AS p2, ...)" is correct,
      because it can refer to a User Defined Function call.
      For a Stored Function however, this has no semantic.
    */
    my_error(ER_WRONG_PARAMETERS_TO_STORED_FCT, MYF(0), name.str);
    return NULL;
  }
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  if (item_list != NULL)
    arg_count= item_list->elements;

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  qname= new (thd->mem_root) sp_name(db, name, use_explicit_name);
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  qname->init_qname(thd);
  sp_add_used_routine(lex, thd, qname, TYPE_ENUM_FUNCTION);

  if (arg_count > 0)
    func= new (thd->mem_root) Item_func_sp(lex->current_context(), qname,
                                           *item_list);
  else
    func= new (thd->mem_root) Item_func_sp(lex->current_context(), qname);

  lex->safe_to_cache_query= 0;
  return func;
}


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Item*
Create_native_func::create(THD *thd, LEX_STRING name, List<Item> *item_list)
{
  if (has_named_parameters(item_list))
  {
    my_error(ER_WRONG_PARAMETERS_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

  return create_native(thd, name, item_list);
}


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Item*
Create_func_arg0::create(THD *thd, LEX_STRING name, List<Item> *item_list)
{
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  if (arg_count != 0)
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

  return create(thd);
}


Item*
Create_func_arg1::create(THD *thd, LEX_STRING name, List<Item> *item_list)
{
  int arg_count= 0;

  if (item_list)
    arg_count= item_list->elements;

  if (arg_count != 1)
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

  Item *param_1= item_list->pop();
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  if (! param_1->is_autogenerated_name)
  {
    my_error(ER_WRONG_PARAMETERS_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

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  return create(thd, param_1);
}


Item*
Create_func_arg2::create(THD *thd, LEX_STRING name, List<Item> *item_list)
{
  int arg_count= 0;

  if (item_list)
    arg_count= item_list->elements;

  if (arg_count != 2)
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

  Item *param_1= item_list->pop();
  Item *param_2= item_list->pop();
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  if (   (! param_1->is_autogenerated_name)
      || (! param_2->is_autogenerated_name))
  {
    my_error(ER_WRONG_PARAMETERS_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

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  return create(thd, param_1, param_2);
}


Item*
Create_func_arg3::create(THD *thd, LEX_STRING name, List<Item> *item_list)
{
  int arg_count= 0;

  if (item_list)
    arg_count= item_list->elements;

  if (arg_count != 3)
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

  Item *param_1= item_list->pop();
  Item *param_2= item_list->pop();
  Item *param_3= item_list->pop();
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  if (   (! param_1->is_autogenerated_name)
      || (! param_2->is_autogenerated_name)
      || (! param_3->is_autogenerated_name))
  {
    my_error(ER_WRONG_PARAMETERS_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

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  return create(thd, param_1, param_2, param_3);
}


Create_func_abs Create_func_abs::s_singleton;

Item*
Create_func_abs::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_abs(arg1);
}


Create_func_acos Create_func_acos::s_singleton;

Item*
Create_func_acos::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_acos(arg1);
}


Create_func_addtime Create_func_addtime::s_singleton;

Item*
Create_func_addtime::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_add_time(arg1, arg2, 0, 0);
}


Create_func_aes_encrypt Create_func_aes_encrypt::s_singleton;

Item*
Create_func_aes_encrypt::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_aes_encrypt(arg1, arg2);
}


Create_func_aes_decrypt Create_func_aes_decrypt::s_singleton;

Item*
Create_func_aes_decrypt::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_aes_decrypt(arg1, arg2);
}


#ifdef HAVE_SPATIAL
Create_func_area Create_func_area::s_singleton;

Item*
Create_func_area::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_area(arg1);
}
#endif


#ifdef HAVE_SPATIAL
Create_func_as_wkb Create_func_as_wkb::s_singleton;

Item*
Create_func_as_wkb::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_as_wkb(arg1);
}
#endif


#ifdef HAVE_SPATIAL
Create_func_as_wkt Create_func_as_wkt::s_singleton;

Item*
Create_func_as_wkt::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_as_wkt(arg1);
}
#endif


Create_func_asin Create_func_asin::s_singleton;

Item*
Create_func_asin::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_asin(arg1);
}


Create_func_atan Create_func_atan::s_singleton;

Item*
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Create_func_atan::create_native(THD *thd, LEX_STRING name,
                                List<Item> *item_list)
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{
  Item* func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 1:
  {
    Item *param_1= item_list->pop();
    func= new (thd->mem_root) Item_func_atan(param_1);
    break;
  }
  case 2:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    func= new (thd->mem_root) Item_func_atan(param_1, param_2);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
}


Create_func_benchmark Create_func_benchmark::s_singleton;

Item*
Create_func_benchmark::create(THD *thd, Item *arg1, Item *arg2)
{
  thd->lex->uncacheable(UNCACHEABLE_SIDEEFFECT);
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  return new (thd->mem_root) Item_func_benchmark(arg1, arg2);
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}


Create_func_bin Create_func_bin::s_singleton;

Item*
Create_func_bin::create(THD *thd, Item *arg1)
{
  Item *i10= new (thd->mem_root) Item_int((int32) 10,2);
  Item *i2= new (thd->mem_root) Item_int((int32) 2,1);
  return new (thd->mem_root) Item_func_conv(arg1, i10, i2);
}


Create_func_bit_count Create_func_bit_count::s_singleton;

Item*
Create_func_bit_count::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_bit_count(arg1);
}


Create_func_bit_length Create_func_bit_length::s_singleton;

Item*
Create_func_bit_length::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_bit_length(arg1);
}


Create_func_ceiling Create_func_ceiling::s_singleton;

Item*
Create_func_ceiling::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_ceiling(arg1);
}


#ifdef HAVE_SPATIAL
Create_func_centroid Create_func_centroid::s_singleton;

Item*
Create_func_centroid::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_centroid(arg1);
}
#endif


Create_func_char_length Create_func_char_length::s_singleton;

Item*
Create_func_char_length::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_char_length(arg1);
}


Create_func_coercibility Create_func_coercibility::s_singleton;

Item*
Create_func_coercibility::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_coercibility(arg1);
}


Create_func_concat Create_func_concat::s_singleton;

Item*
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Create_func_concat::create_native(THD *thd, LEX_STRING name,
                                  List<Item> *item_list)
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{
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  if (arg_count < 1)
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

  return new (thd->mem_root) Item_func_concat(*item_list);
}


Create_func_concat_ws Create_func_concat_ws::s_singleton;

Item*
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Create_func_concat_ws::create_native(THD *thd, LEX_STRING name,
                                     List<Item> *item_list)
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{
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  /* "WS" stands for "With Separator": this function takes 2+ arguments */
  if (arg_count < 2)
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

  return new (thd->mem_root) Item_func_concat_ws(*item_list);
}


Create_func_compress Create_func_compress::s_singleton;

Item*
Create_func_compress::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_compress(arg1);
}


Create_func_connection_id Create_func_connection_id::s_singleton;

Item*
Create_func_connection_id::create(THD *thd)
{
  thd->lex->safe_to_cache_query= 0;
  return new (thd->mem_root) Item_func_connection_id();
}


#ifdef HAVE_SPATIAL
Create_func_contains Create_func_contains::s_singleton;

Item*
Create_func_contains::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_spatial_rel(arg1, arg2,
                                                   Item_func::SP_CONTAINS_FUNC);
}
#endif


Create_func_conv Create_func_conv::s_singleton;

Item*
Create_func_conv::create(THD *thd, Item *arg1, Item *arg2, Item *arg3)
{
  return new (thd->mem_root) Item_func_conv(arg1, arg2, arg3);
}


Create_func_convert_tz Create_func_convert_tz::s_singleton;

Item*
Create_func_convert_tz::create(THD *thd, Item *arg1, Item *arg2, Item *arg3)
{
  return new (thd->mem_root) Item_func_convert_tz(arg1, arg2, arg3);
}


Create_func_cos Create_func_cos::s_singleton;

Item*
Create_func_cos::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_cos(arg1);
}


Create_func_cot Create_func_cot::s_singleton;

Item*
Create_func_cot::create(THD *thd, Item *arg1)
{
  Item *i1= new (thd->mem_root) Item_int((char*) "1", 1, 1);
  Item *i2= new (thd->mem_root) Item_func_tan(arg1);
  return new (thd->mem_root) Item_func_div(i1, i2);
}


Create_func_crc32 Create_func_crc32::s_singleton;

Item*
Create_func_crc32::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_crc32(arg1);
}


#ifdef HAVE_SPATIAL
Create_func_crosses Create_func_crosses::s_singleton;

Item*
Create_func_crosses::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_spatial_rel(arg1, arg2,
                                                   Item_func::SP_CROSSES_FUNC);
}
#endif


Create_func_date_format Create_func_date_format::s_singleton;

Item*
Create_func_date_format::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_date_format(arg1, arg2, 0);
}


Create_func_datediff Create_func_datediff::s_singleton;

Item*
Create_func_datediff::create(THD *thd, Item *arg1, Item *arg2)
{
  Item *i1= new (thd->mem_root) Item_func_to_days(arg1);
  Item *i2= new (thd->mem_root) Item_func_to_days(arg2);

  return new (thd->mem_root) Item_func_minus(i1, i2);
}


Create_func_dayname Create_func_dayname::s_singleton;

Item*
Create_func_dayname::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_dayname(arg1);
}


Create_func_dayofmonth Create_func_dayofmonth::s_singleton;

Item*
Create_func_dayofmonth::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_dayofmonth(arg1);
}


Create_func_dayofweek Create_func_dayofweek::s_singleton;

Item*
Create_func_dayofweek::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_weekday(arg1, 1);
}


Create_func_dayofyear Create_func_dayofyear::s_singleton;

Item*
Create_func_dayofyear::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_dayofyear(arg1);
}


Create_func_decode Create_func_decode::s_singleton;

Item*
Create_func_decode::create(THD *thd, Item *arg1, Item *arg2)
{
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  return new (thd->mem_root) Item_func_decode(arg1, arg2);
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}


Create_func_degrees Create_func_degrees::s_singleton;

Item*
Create_func_degrees::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_units((char*) "degrees", arg1,
                                             180/M_PI, 0.0);
}


Create_func_des_decrypt Create_func_des_decrypt::s_singleton;

Item*
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Create_func_des_decrypt::create_native(THD *thd, LEX_STRING name,
                                       List<Item> *item_list)
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{
  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 1:
  {
    Item *param_1= item_list->pop();
    func= new (thd->mem_root) Item_func_des_decrypt(param_1);
    break;
  }
  case 2:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    func= new (thd->mem_root) Item_func_des_decrypt(param_1, param_2);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
}


Create_func_des_encrypt Create_func_des_encrypt::s_singleton;

Item*
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Create_func_des_encrypt::create_native(THD *thd, LEX_STRING name,
                                       List<Item> *item_list)
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{
  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 1:
  {
    Item *param_1= item_list->pop();
    func= new (thd->mem_root) Item_func_des_encrypt(param_1);
    break;
  }
  case 2:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    func= new (thd->mem_root) Item_func_des_encrypt(param_1, param_2);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
}


#ifdef HAVE_SPATIAL
Create_func_dimension Create_func_dimension::s_singleton;

Item*
Create_func_dimension::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_dimension(arg1);
}
#endif


#ifdef HAVE_SPATIAL
Create_func_disjoint Create_func_disjoint::s_singleton;

Item*
Create_func_disjoint::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_spatial_rel(arg1, arg2,
                                                   Item_func::SP_DISJOINT_FUNC);
}
#endif


Create_func_elt Create_func_elt::s_singleton;

Item*
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Create_func_elt::create_native(THD *thd, LEX_STRING name,
                               List<Item> *item_list)
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{
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  if (arg_count < 2)
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

  return new (thd->mem_root) Item_func_elt(*item_list);
}


Create_func_encode Create_func_encode::s_singleton;

Item*
Create_func_encode::create(THD *thd, Item *arg1, Item *arg2)
{
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  return new (thd->mem_root) Item_func_encode(arg1, arg2);
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}


Create_func_encrypt Create_func_encrypt::s_singleton;

Item*
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Create_func_encrypt::create_native(THD *thd, LEX_STRING name,
                                   List<Item> *item_list)
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{
  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 1:
  {
    Item *param_1= item_list->pop();
    func= new (thd->mem_root) Item_func_encrypt(param_1);
    thd->lex->uncacheable(UNCACHEABLE_RAND);
    break;
  }
  case 2:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    func= new (thd->mem_root) Item_func_encrypt(param_1, param_2);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
}


#ifdef HAVE_SPATIAL
Create_func_endpoint Create_func_endpoint::s_singleton;

Item*
Create_func_endpoint::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_spatial_decomp(arg1,
                                                      Item_func::SP_ENDPOINT);
}
#endif


#ifdef HAVE_SPATIAL
Create_func_envelope Create_func_envelope::s_singleton;

Item*
Create_func_envelope::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_envelope(arg1);
}
#endif


#ifdef HAVE_SPATIAL
Create_func_equals Create_func_equals::s_singleton;

Item*
Create_func_equals::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_spatial_rel(arg1, arg2,
                                                   Item_func::SP_EQUALS_FUNC);
}
#endif


Create_func_exp Create_func_exp::s_singleton;

Item*
Create_func_exp::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_exp(arg1);
}


Create_func_export_set Create_func_export_set::s_singleton;

Item*
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Create_func_export_set::create_native(THD *thd, LEX_STRING name,
                                      List<Item> *item_list)
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{
  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 3:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    Item *param_3= item_list->pop();
    func= new (thd->mem_root) Item_func_export_set(param_1, param_2, param_3);
    break;
  }
  case 4:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    Item *param_3= item_list->pop();
    Item *param_4= item_list->pop();
    func= new (thd->mem_root) Item_func_export_set(param_1, param_2, param_3,
                                                   param_4);
    break;
  }
  case 5:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    Item *param_3= item_list->pop();
    Item *param_4= item_list->pop();
    Item *param_5= item_list->pop();
    func= new (thd->mem_root) Item_func_export_set(param_1, param_2, param_3,
                                                   param_4, param_5);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
}


#ifdef HAVE_SPATIAL
Create_func_exteriorring Create_func_exteriorring::s_singleton;

Item*
Create_func_exteriorring::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_spatial_decomp(arg1,
                                                      Item_func::SP_EXTERIORRING);
}
#endif


Create_func_field Create_func_field::s_singleton;

Item*
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Create_func_field::create_native(THD *thd, LEX_STRING name,
                                 List<Item> *item_list)
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{
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  if (arg_count < 2)
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

  return new (thd->mem_root) Item_func_field(*item_list);
}


Create_func_find_in_set Create_func_find_in_set::s_singleton;

Item*
Create_func_find_in_set::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_find_in_set(arg1, arg2);
}


Create_func_floor Create_func_floor::s_singleton;

Item*
Create_func_floor::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_floor(arg1);
}


Create_func_format Create_func_format::s_singleton;

Item*
Create_func_format::create(THD *thd, Item *arg1, Item *arg2)
{
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  return new (thd->mem_root) Item_func_format(arg1, arg2);
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}


Create_func_found_rows Create_func_found_rows::s_singleton;

Item*
Create_func_found_rows::create(THD *thd)
{
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  thd->lex->set_stmt_unsafe();
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  thd->lex->safe_to_cache_query= 0;
  return new (thd->mem_root) Item_func_found_rows();
}


Create_func_from_days Create_func_from_days::s_singleton;

Item*
Create_func_from_days::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_from_days(arg1);
}


Create_func_from_unixtime Create_func_from_unixtime::s_singleton;

Item*
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Create_func_from_unixtime::create_native(THD *thd, LEX_STRING name,
                                         List<Item> *item_list)
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{
  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 1:
  {
    Item *param_1= item_list->pop();
    func= new (thd->mem_root) Item_func_from_unixtime(param_1);
    break;
  }
  case 2:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    Item *ut= new (thd->mem_root) Item_func_from_unixtime(param_1);
    func= new (thd->mem_root) Item_func_date_format(ut, param_2, 0);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
}


#ifdef HAVE_SPATIAL
Create_func_geometry_from_text Create_func_geometry_from_text::s_singleton;

Item*
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Create_func_geometry_from_text::create_native(THD *thd, LEX_STRING name,
                                              List<Item> *item_list)
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{
  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 1:
  {
    Item *param_1= item_list->pop();
    func= new (thd->mem_root) Item_func_geometry_from_text(param_1);
    thd->lex->uncacheable(UNCACHEABLE_RAND);
    break;
  }
  case 2:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    func= new (thd->mem_root) Item_func_geometry_from_text(param_1, param_2);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
}
#endif


#ifdef HAVE_SPATIAL
Create_func_geometry_from_wkb Create_func_geometry_from_wkb::s_singleton;

Item*
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Create_func_geometry_from_wkb::create_native(THD *thd, LEX_STRING name,
                                             List<Item> *item_list)
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{
  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 1:
  {
    Item *param_1= item_list->pop();
    func= new (thd->mem_root) Item_func_geometry_from_wkb(param_1);
    thd->lex->uncacheable(UNCACHEABLE_RAND);
    break;
  }
  case 2:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    func= new (thd->mem_root) Item_func_geometry_from_wkb(param_1, param_2);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
}
#endif


#ifdef HAVE_SPATIAL
Create_func_geometry_type Create_func_geometry_type::s_singleton;

Item*
Create_func_geometry_type::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_geometry_type(arg1);
}
#endif


#ifdef HAVE_SPATIAL
Create_func_geometryn Create_func_geometryn::s_singleton;

Item*
Create_func_geometryn::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_spatial_decomp_n(arg1, arg2,
                                                        Item_func::SP_GEOMETRYN);
}
#endif


Create_func_get_lock Create_func_get_lock::s_singleton;

Item*
Create_func_get_lock::create(THD *thd, Item *arg1, Item *arg2)
{
  thd->lex->uncacheable(UNCACHEABLE_SIDEEFFECT);
  return new (thd->mem_root) Item_func_get_lock(arg1, arg2);
}


#ifdef HAVE_SPATIAL
Create_func_glength Create_func_glength::s_singleton;

Item*
Create_func_glength::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_glength(arg1);
}
#endif


Create_func_greatest Create_func_greatest::s_singleton;

Item*
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Create_func_greatest::create_native(THD *thd, LEX_STRING name,
                                    List<Item> *item_list)
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{
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  if (arg_count < 2)
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

  return new (thd->mem_root) Item_func_max(*item_list);
}


Create_func_hex Create_func_hex::s_singleton;

Item*
Create_func_hex::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_hex(arg1);
}


Create_func_ifnull Create_func_ifnull::s_singleton;

Item*
Create_func_ifnull::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_ifnull(arg1, arg2);
}


Create_func_inet_ntoa Create_func_inet_ntoa::s_singleton;

Item*
Create_func_inet_ntoa::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_inet_ntoa(arg1);
}


Create_func_inet_aton Create_func_inet_aton::s_singleton;

Item*
Create_func_inet_aton::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_inet_aton(arg1);
}


Create_func_instr Create_func_instr::s_singleton;

Item*
Create_func_instr::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_locate(arg1, arg2);
}


#ifdef HAVE_SPATIAL
Create_func_interiorringn Create_func_interiorringn::s_singleton;

Item*
Create_func_interiorringn::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_spatial_decomp_n(arg1, arg2,
                                                        Item_func::SP_INTERIORRINGN);
}
#endif


#ifdef HAVE_SPATIAL
Create_func_intersects Create_func_intersects::s_singleton;

Item*
Create_func_intersects::create(THD *thd, Item *arg1, Item *arg2)
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{
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  return new (thd->mem_root) Item_func_spatial_rel(arg1, arg2,
                                                   Item_func::SP_INTERSECTS_FUNC);
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}
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#endif


Create_func_is_free_lock Create_func_is_free_lock::s_singleton;

Item*
Create_func_is_free_lock::create(THD *thd, Item *arg1)
{
  thd->lex->uncacheable(UNCACHEABLE_SIDEEFFECT);
  return new (thd->mem_root) Item_func_is_free_lock(arg1);
}


Create_func_is_used_lock Create_func_is_used_lock::s_singleton;
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Item*
Create_func_is_used_lock::create(THD *thd, Item *arg1)
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{
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  thd->lex->uncacheable(UNCACHEABLE_SIDEEFFECT);
  return new (thd->mem_root) Item_func_is_used_lock(arg1);
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}

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#ifdef HAVE_SPATIAL
Create_func_isclosed Create_func_isclosed::s_singleton;

Item*
Create_func_isclosed::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_isclosed(arg1);
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}
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#endif
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#ifdef HAVE_SPATIAL
Create_func_isempty Create_func_isempty::s_singleton;

Item*
Create_func_isempty::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_isempty(arg1);
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}
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#endif
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Create_func_isnull Create_func_isnull::s_singleton;

Item*
Create_func_isnull::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_isnull(arg1);
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}

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#ifdef HAVE_SPATIAL
Create_func_issimple Create_func_issimple::s_singleton;

Item*
Create_func_issimple::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_issimple(arg1);
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}
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#endif


Create_func_last_day Create_func_last_day::s_singleton;
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Item*
Create_func_last_day::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_last_day(arg1);
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}

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Create_func_last_insert_id Create_func_last_insert_id::s_singleton;

Item*
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Create_func_last_insert_id::create_native(THD *thd, LEX_STRING name,
                                          List<Item> *item_list)
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{
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  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 0:
  {
    func= new (thd->mem_root) Item_func_last_insert_id();
    thd->lex->safe_to_cache_query= 0;
    break;
  }
  case 1:
  {
    Item *param_1= item_list->pop();
    func= new (thd->mem_root) Item_func_last_insert_id(param_1);
    thd->lex->safe_to_cache_query= 0;
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
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}

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Create_func_lcase Create_func_lcase::s_singleton;

Item*
Create_func_lcase::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_lcase(arg1);
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}

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Create_func_least Create_func_least::s_singleton;

Item*
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Create_func_least::create_native(THD *thd, LEX_STRING name,
                                 List<Item> *item_list)
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{
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  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  if (arg_count < 2)
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

  return new (thd->mem_root) Item_func_min(*item_list);
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}

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Create_func_length Create_func_length::s_singleton;

Item*
Create_func_length::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_length(arg1);
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}
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Create_func_ln Create_func_ln::s_singleton;

Item*
Create_func_ln::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_ln(arg1);
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}

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Create_func_load_file Create_func_load_file::s_singleton;

Item*
Create_func_load_file::create(THD *thd, Item *arg1)
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{
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  thd->lex->uncacheable(UNCACHEABLE_SIDEEFFECT);
  return new (thd->mem_root) Item_load_file(arg1);
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}

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Create_func_locate Create_func_locate::s_singleton;

Item*
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Create_func_locate::create_native(THD *thd, LEX_STRING name,
                                  List<Item> *item_list)
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{
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  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 2:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    /* Yes, parameters in that order : 2, 1 */
    func= new (thd->mem_root) Item_func_locate(param_2, param_1);
    break;
  }
  case 3:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    Item *param_3= item_list->pop();
    /* Yes, parameters in that order : 2, 1, 3 */
    func= new (thd->mem_root) Item_func_locate(param_2, param_1, param_3);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
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}

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Create_func_log Create_func_log::s_singleton;

Item*
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Create_func_log::create_native(THD *thd, LEX_STRING name,
                               List<Item> *item_list)
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{
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  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 1:
  {
    Item *param_1= item_list->pop();
    func= new (thd->mem_root) Item_func_log(param_1);
    break;
  }
  case 2:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    func= new (thd->mem_root) Item_func_log(param_1, param_2);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
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}

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Create_func_log10 Create_func_log10::s_singleton;

Item*
Create_func_log10::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_log10(arg1);
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}

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Create_func_log2 Create_func_log2::s_singleton;

Item*
Create_func_log2::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_log2(arg1);
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}

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Create_func_lpad Create_func_lpad::s_singleton;

Item*
Create_func_lpad::create(THD *thd, Item *arg1, Item *arg2, Item *arg3)
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{
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  return new (thd->mem_root) Item_func_lpad(arg1, arg2, arg3);
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}

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Create_func_ltrim Create_func_ltrim::s_singleton;

Item*
Create_func_ltrim::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_ltrim(arg1);
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}

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Create_func_makedate Create_func_makedate::s_singleton;

Item*
Create_func_makedate::create(THD *thd, Item *arg1, Item *arg2)
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{
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  return new (thd->mem_root) Item_func_makedate(arg1, arg2);
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}

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Create_func_maketime Create_func_maketime::s_singleton;

Item*
Create_func_maketime::create(THD *thd, Item *arg1, Item *arg2, Item *arg3)
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{
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  return new (thd->mem_root) Item_func_maketime(arg1, arg2, arg3);
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}

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Create_func_make_set Create_func_make_set::s_singleton;

Item*
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Create_func_make_set::create_native(THD *thd, LEX_STRING name,
                                    List<Item> *item_list)
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{
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  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  if (arg_count < 2)
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    return NULL;
  }

  Item *param_1= item_list->pop();
  return new (thd->mem_root) Item_func_make_set(param_1, *item_list);
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}

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Create_func_master_pos_wait Create_func_master_pos_wait::s_singleton;

Item*
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Create_func_master_pos_wait::create_native(THD *thd, LEX_STRING name,
                                           List<Item> *item_list)
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{
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  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 2:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    func= new (thd->mem_root) Item_master_pos_wait(param_1, param_2);
    thd->lex->safe_to_cache_query= 0;
    break;
  }
  case 3:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    Item *param_3= item_list->pop();
    func= new (thd->mem_root) Item_master_pos_wait(param_1, param_2, param_3);
    thd->lex->safe_to_cache_query= 0;
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
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  }
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  return func;
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}

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Create_func_md5 Create_func_md5::s_singleton;

Item*
Create_func_md5::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_md5(arg1);
}


Create_func_monthname Create_func_monthname::s_singleton;

Item*
Create_func_monthname::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_monthname(arg1);
}


Create_func_name_const Create_func_name_const::s_singleton;

Item*
Create_func_name_const::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_name_const(arg1, arg2);
}


Create_func_nullif Create_func_nullif::s_singleton;

Item*
Create_func_nullif::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_nullif(arg1, arg2);
}


#ifdef HAVE_SPATIAL
Create_func_numgeometries Create_func_numgeometries::s_singleton;

Item*
Create_func_numgeometries::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_numgeometries(arg1);
}
#endif


#ifdef HAVE_SPATIAL
Create_func_numinteriorring Create_func_numinteriorring::s_singleton;

Item*
Create_func_numinteriorring::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_numinteriorring(arg1);
}
#endif


#ifdef HAVE_SPATIAL
Create_func_numpoints Create_func_numpoints::s_singleton;

Item*
Create_func_numpoints::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_numpoints(arg1);
}
#endif


Create_func_oct Create_func_oct::s_singleton;

Item*
Create_func_oct::create(THD *thd, Item *arg1)
{
  Item *i10= new (thd->mem_root) Item_int((int32) 10,2);
  Item *i8= new (thd->mem_root) Item_int((int32) 8,1);
  return new (thd->mem_root) Item_func_conv(arg1, i10, i8);
}


Create_func_ord Create_func_ord::s_singleton;

Item*
Create_func_ord::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_ord(arg1);
}


#ifdef HAVE_SPATIAL
Create_func_overlaps Create_func_overlaps::s_singleton;

Item*
Create_func_overlaps::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_spatial_rel(arg1, arg2,
                                                   Item_func::SP_OVERLAPS_FUNC);
}
#endif


Create_func_period_add Create_func_period_add::s_singleton;

Item*
Create_func_period_add::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_period_add(arg1, arg2);
}


Create_func_period_diff Create_func_period_diff::s_singleton;

Item*
Create_func_period_diff::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_period_diff(arg1, arg2);
}


Create_func_pi Create_func_pi::s_singleton;

Item*
Create_func_pi::create(THD *thd)
{
  return new (thd->mem_root) Item_static_float_func("pi()", M_PI, 6, 8);
}


#ifdef HAVE_SPATIAL
Create_func_pointn Create_func_pointn::s_singleton;

Item*
Create_func_pointn::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_spatial_decomp_n(arg1, arg2,
                                                        Item_func::SP_POINTN);
}
#endif


Create_func_pow Create_func_pow::s_singleton;

Item*
Create_func_pow::create(THD *thd, Item *arg1, Item *arg2)
{
  return new (thd->mem_root) Item_func_pow(arg1, arg2);
}


Create_func_quote Create_func_quote::s_singleton;

Item*
Create_func_quote::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_quote(arg1);
}


Create_func_radians Create_func_radians::s_singleton;

Item*
Create_func_radians::create(THD *thd, Item *arg1)
{
  return new (thd->mem_root) Item_func_units((char*) "radians", arg1,
                                             M_PI/180, 0.0);
}


Create_func_rand Create_func_rand::s_singleton;

Item*
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Create_func_rand::create_native(THD *thd, LEX_STRING name,
                                List<Item> *item_list)
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{
  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 0:
  {
    func= new (thd->mem_root) Item_func_rand();
    thd->lex->uncacheable(UNCACHEABLE_RAND);
    break;
  }
  case 1:
  {
    Item *param_1= item_list->pop();
    func= new (thd->mem_root) Item_func_rand(param_1);
    thd->lex->uncacheable(UNCACHEABLE_RAND);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
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}

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Create_func_release_lock Create_func_release_lock::s_singleton;

Item*
Create_func_release_lock::create(THD *thd, Item *arg1)
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{
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  thd->lex->uncacheable(UNCACHEABLE_SIDEEFFECT);
  return new (thd->mem_root) Item_func_release_lock(arg1);
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}

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Create_func_reverse Create_func_reverse::s_singleton;

Item*
Create_func_reverse::create(THD *thd, Item *arg1)
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{
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  return new (thd->mem_root) Item_func_reverse(arg1);
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}

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Create_func_round Create_func_round::s_singleton;

Item*
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Create_func_round::create_native(THD *thd, LEX_STRING name,
                                 List<Item> *item_list)
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{
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  Item *func= NULL;
  int arg_count= 0;

  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 1:
  {
    Item *param_1= item_list->pop();
    Item *i0 = new (thd->mem_root) Item_int((char*)"0", 0, 1);
    func= new (thd->mem_root) Item_func_round(param_1, i0, 0);
    break;
  }
  case 2:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    func= new (thd->mem_root) Item_func_round(param_1, param_2, 0);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }

  return func;
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}

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Create_func_row_count Create_func_row_count::s_singleton;

Item*
Create_func_row_count::create(THD *thd)
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4261
{
4262
  thd->lex->set_stmt_unsafe();
4263 4264
  thd->lex->safe_to_cache_query= 0;
  return new (thd->mem_root) Item_func_row_count();
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}


4268
Create_func_rpad Create_func_rpad::s_singleton;
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4269

4270 4271
Item*
Create_func_rpad::create(THD *thd, Item *arg1, Item *arg2, Item *arg3)
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{
4273
  return new (thd->mem_root) Item_func_rpad(arg1, arg2, arg3);
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}


4277
Create_func_rtrim Create_func_rtrim::s_singleton;
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4278

4279 4280
Item*
Create_func_rtrim::create(THD *thd, Item *arg1)
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4281
{
4282
  return new (thd->mem_root) Item_func_rtrim(arg1);
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}


4286
Create_func_sec_to_time Create_func_sec_to_time::s_singleton;
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4287

4288 4289
Item*
Create_func_sec_to_time::create(THD *thd, Item *arg1)
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4290
{
4291
  return new (thd->mem_root) Item_func_sec_to_time(arg1);
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}

4294

4295
Create_func_sha Create_func_sha::s_singleton;
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4296

4297 4298
Item*
Create_func_sha::create(THD *thd, Item *arg1)
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{
4300
  return new (thd->mem_root) Item_func_sha(arg1);
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}

4303

4304
Create_func_sign Create_func_sign::s_singleton;
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4305

4306 4307
Item*
Create_func_sign::create(THD *thd, Item *arg1)
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4308
{
4309
  return new (thd->mem_root) Item_func_sign(arg1);
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}


4313
Create_func_sin Create_func_sin::s_singleton;
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4315 4316
Item*
Create_func_sin::create(THD *thd, Item *arg1)
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4317
{
4318
  return new (thd->mem_root) Item_func_sin(arg1);
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}


4322
Create_func_sleep Create_func_sleep::s_singleton;
4323

4324 4325
Item*
Create_func_sleep::create(THD *thd, Item *arg1)
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4326
{
4327 4328
  thd->lex->uncacheable(UNCACHEABLE_SIDEEFFECT);
  return new (thd->mem_root) Item_func_sleep(arg1);
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}


4332
Create_func_soundex Create_func_soundex::s_singleton;
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4333

4334 4335
Item*
Create_func_soundex::create(THD *thd, Item *arg1)
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4336
{
4337
  return new (thd->mem_root) Item_func_soundex(arg1);
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}


4341
Create_func_space Create_func_space::s_singleton;
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4342

4343 4344
Item*
Create_func_space::create(THD *thd, Item *arg1)
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4345
{
4346 4347 4348 4349 4350 4351 4352
  /**
    TODO: Fix Bug#23637
    The parsed item tree should not depend on
    <code>thd->variables.collation_connection</code>.
  */
  CHARSET_INFO *cs= thd->variables.collation_connection;
  Item *sp;
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4353

4354 4355 4356
  if (cs->mbminlen > 1)
  {
    uint dummy_errors;
4357
    sp= new (thd->mem_root) Item_string("", 0, cs, DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
4358 4359 4360 4361
    sp->str_value.copy(" ", 1, &my_charset_latin1, cs, &dummy_errors);
  }
  else
  {
4362
    sp= new (thd->mem_root) Item_string(" ", 1, cs, DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
4363
  }
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4364

4365
  return new (thd->mem_root) Item_func_repeat(sp, arg1);
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}


4369
Create_func_sqrt Create_func_sqrt::s_singleton;
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4370

4371 4372
Item*
Create_func_sqrt::create(THD *thd, Item *arg1)
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4373
{
4374
  return new (thd->mem_root) Item_func_sqrt(arg1);
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}


4378 4379
#ifdef HAVE_SPATIAL
Create_func_srid Create_func_srid::s_singleton;
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4380

4381 4382
Item*
Create_func_srid::create(THD *thd, Item *arg1)
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4383
{
4384
  return new (thd->mem_root) Item_func_srid(arg1);
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4385
}
4386
#endif
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4389 4390
#ifdef HAVE_SPATIAL
Create_func_startpoint Create_func_startpoint::s_singleton;
4391

4392 4393
Item*
Create_func_startpoint::create(THD *thd, Item *arg1)
4394
{
4395 4396
  return new (thd->mem_root) Item_func_spatial_decomp(arg1,
                                                      Item_func::SP_STARTPOINT);
4397
}
4398
#endif
4399

4400

4401
Create_func_str_to_date Create_func_str_to_date::s_singleton;
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4402

4403 4404
Item*
Create_func_str_to_date::create(THD *thd, Item *arg1, Item *arg2)
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4405
{
4406
  return new (thd->mem_root) Item_func_str_to_date(arg1, arg2);
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}

4409 4410 4411 4412 4413

Create_func_strcmp Create_func_strcmp::s_singleton;

Item*
Create_func_strcmp::create(THD *thd, Item *arg1, Item *arg2)
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4414
{
4415
  return new (thd->mem_root) Item_func_strcmp(arg1, arg2);
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}

4418 4419 4420 4421 4422

Create_func_substr_index Create_func_substr_index::s_singleton;

Item*
Create_func_substr_index::create(THD *thd, Item *arg1, Item *arg2, Item *arg3)
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4423
{
4424
  return new (thd->mem_root) Item_func_substr_index(arg1, arg2, arg3);
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}

4427 4428 4429 4430 4431

Create_func_subtime Create_func_subtime::s_singleton;

Item*
Create_func_subtime::create(THD *thd, Item *arg1, Item *arg2)
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4432
{
4433
  return new (thd->mem_root) Item_func_add_time(arg1, arg2, 0, 1);
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}

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Create_func_tan Create_func_tan::s_singleton;

Item*
Create_func_tan::create(THD *thd, Item *arg1)
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4441
{
4442
  return new (thd->mem_root) Item_func_tan(arg1);
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}

4445 4446 4447 4448 4449

Create_func_time_format Create_func_time_format::s_singleton;

Item*
Create_func_time_format::create(THD *thd, Item *arg1, Item *arg2)
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4450
{
4451
  return new (thd->mem_root) Item_func_date_format(arg1, arg2, 1);
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}

4454 4455 4456 4457 4458

Create_func_time_to_sec Create_func_time_to_sec::s_singleton;

Item*
Create_func_time_to_sec::create(THD *thd, Item *arg1)
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4459
{
4460
  return new (thd->mem_root) Item_func_time_to_sec(arg1);
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}

4463 4464 4465 4466 4467

Create_func_timediff Create_func_timediff::s_singleton;

Item*
Create_func_timediff::create(THD *thd, Item *arg1, Item *arg2)
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4468
{
4469
  return new (thd->mem_root) Item_func_timediff(arg1, arg2);
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}

4472 4473 4474 4475 4476

Create_func_to_days Create_func_to_days::s_singleton;

Item*
Create_func_to_days::create(THD *thd, Item *arg1)
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4477
{
4478
  return new (thd->mem_root) Item_func_to_days(arg1);
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}

4481 4482 4483 4484 4485 4486

#ifdef HAVE_SPATIAL
Create_func_touches Create_func_touches::s_singleton;

Item*
Create_func_touches::create(THD *thd, Item *arg1, Item *arg2)
4487
{
4488 4489
  return new (thd->mem_root) Item_func_spatial_rel(arg1, arg2,
                                                   Item_func::SP_TOUCHES_FUNC);
4490
}
4491
#endif
4492

4493 4494 4495 4496 4497

Create_func_ucase Create_func_ucase::s_singleton;

Item*
Create_func_ucase::create(THD *thd, Item *arg1)
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4498
{
4499
  return new (thd->mem_root) Item_func_ucase(arg1);
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}

4502 4503 4504 4505 4506

Create_func_uncompress Create_func_uncompress::s_singleton;

Item*
Create_func_uncompress::create(THD *thd, Item *arg1)
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4507
{
4508
  return new (thd->mem_root) Item_func_uncompress(arg1);
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}

4511 4512 4513 4514 4515

Create_func_uncompressed_length Create_func_uncompressed_length::s_singleton;

Item*
Create_func_uncompressed_length::create(THD *thd, Item *arg1)
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4516
{
4517
  return new (thd->mem_root) Item_func_uncompressed_length(arg1);
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}

4520 4521 4522 4523 4524

Create_func_unhex Create_func_unhex::s_singleton;

Item*
Create_func_unhex::create(THD *thd, Item *arg1)
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4525
{
4526
  return new (thd->mem_root) Item_func_unhex(arg1);
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4527
}
4528

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4529

4530 4531 4532
Create_func_unix_timestamp Create_func_unix_timestamp::s_singleton;

Item*
4533 4534
Create_func_unix_timestamp::create_native(THD *thd, LEX_STRING name,
                                          List<Item> *item_list)
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4535
{
4536 4537
  Item *func= NULL;
  int arg_count= 0;
4538

4539 4540 4541 4542 4543 4544 4545 4546
  if (item_list != NULL)
    arg_count= item_list->elements;

  switch (arg_count) {
  case 0:
  {
    func= new (thd->mem_root) Item_func_unix_timestamp();
    thd->lex->safe_to_cache_query= 0;
4547
    break;
4548 4549 4550 4551 4552
  }
  case 1:
  {
    Item *param_1= item_list->pop();
    func= new (thd->mem_root) Item_func_unix_timestamp(param_1);
4553
    break;
4554
  }
4555
  default:
4556 4557
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
4558
    break;
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4559
  }
4560
  }
4561

4562
  return func;
4563 4564
}

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SCRUM  
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4565

4566
Create_func_uuid Create_func_uuid::s_singleton;
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monty@narttu.mysql.fi committed
4567

4568 4569
Item*
Create_func_uuid::create(THD *thd)
4570
{
4571
  thd->lex->set_stmt_unsafe();
4572
  thd->lex->safe_to_cache_query= 0;
4573
  return new (thd->mem_root) Item_func_uuid();
4574 4575 4576
}


4577 4578 4579 4580 4581
Create_func_uuid_short Create_func_uuid_short::s_singleton;

Item*
Create_func_uuid_short::create(THD *thd)
{
4582
  thd->lex->set_stmt_unsafe();
4583
  thd->lex->safe_to_cache_query= 0;
4584 4585 4586 4587
  return new (thd->mem_root) Item_func_uuid_short();
}


4588
Create_func_version Create_func_version::s_singleton;
4589

4590 4591
Item*
Create_func_version::create(THD *thd)
4592
{
4593 4594 4595 4596 4597
  return new (thd->mem_root) Item_static_string_func("version()",
                                                     server_version,
                                                     (uint) strlen(server_version),
                                                     system_charset_info,
                                                     DERIVATION_SYSCONST);
4598 4599
}

4600

4601
Create_func_weekday Create_func_weekday::s_singleton;
4602

4603 4604
Item*
Create_func_weekday::create(THD *thd, Item *arg1)
4605
{
4606
  return new (thd->mem_root) Item_func_weekday(arg1, 0);
4607 4608 4609
}


4610
Create_func_weekofyear Create_func_weekofyear::s_singleton;
4611

4612 4613
Item*
Create_func_weekofyear::create(THD *thd, Item *arg1)
4614
{
4615 4616
  Item *i1= new (thd->mem_root) Item_int((char*) "0", 3, 1);
  return new (thd->mem_root) Item_func_week(arg1, i1);
4617 4618 4619
}


4620 4621
#ifdef HAVE_SPATIAL
Create_func_within Create_func_within::s_singleton;
4622

4623 4624
Item*
Create_func_within::create(THD *thd, Item *arg1, Item *arg2)
4625
{
4626 4627
  return new (thd->mem_root) Item_func_spatial_rel(arg1, arg2,
                                                   Item_func::SP_WITHIN_FUNC);
4628
}
4629
#endif
4630 4631


4632 4633
#ifdef HAVE_SPATIAL
Create_func_x Create_func_x::s_singleton;
4634

4635 4636
Item*
Create_func_x::create(THD *thd, Item *arg1)
4637
{
4638
  return new (thd->mem_root) Item_func_x(arg1);
4639
}
4640
#endif
4641 4642


4643
Create_func_xml_extractvalue Create_func_xml_extractvalue::s_singleton;
4644

4645 4646
Item*
Create_func_xml_extractvalue::create(THD *thd, Item *arg1, Item *arg2)
4647
{
4648
  return new (thd->mem_root) Item_func_xml_extractvalue(arg1, arg2);
4649 4650 4651
}


4652
Create_func_xml_update Create_func_xml_update::s_singleton;
4653

4654 4655
Item*
Create_func_xml_update::create(THD *thd, Item *arg1, Item *arg2, Item *arg3)
4656
{
4657
  return new (thd->mem_root) Item_func_xml_update(arg1, arg2, arg3);
4658 4659 4660
}


4661 4662
#ifdef HAVE_SPATIAL
Create_func_y Create_func_y::s_singleton;
4663

4664 4665
Item*
Create_func_y::create(THD *thd, Item *arg1)
4666
{
4667
  return new (thd->mem_root) Item_func_y(arg1);
4668
}
4669
#endif
4670 4671


4672
Create_func_year_week Create_func_year_week::s_singleton;
4673

4674
Item*
4675 4676
Create_func_year_week::create_native(THD *thd, LEX_STRING name,
                                     List<Item> *item_list)
4677
{
4678 4679
  Item *func= NULL;
  int arg_count= 0;
4680

4681 4682
  if (item_list != NULL)
    arg_count= item_list->elements;
4683

4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704
  switch (arg_count) {
  case 1:
  {
    Item *param_1= item_list->pop();
    Item *i0= new (thd->mem_root) Item_int((char*) "0", 0, 1);
    func= new (thd->mem_root) Item_func_yearweek(param_1, i0);
    break;
  }
  case 2:
  {
    Item *param_1= item_list->pop();
    Item *param_2= item_list->pop();
    func= new (thd->mem_root) Item_func_yearweek(param_1, param_2);
    break;
  }
  default:
  {
    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
    break;
  }
  }
4705

4706
  return func;
4707 4708 4709
}


4710
struct Native_func_registry
4711
{
4712 4713 4714
  LEX_STRING name;
  Create_func *builder;
};
4715

4716
#define BUILDER(F) & F::s_singleton
4717

4718 4719 4720 4721 4722
#ifdef HAVE_SPATIAL
  #define GEOM_BUILDER(F) & F::s_singleton
#else
  #define GEOM_BUILDER(F) & Create_func_no_geom::s_singleton
#endif
4723

4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736
/*
  MySQL native functions.
  MAINTAINER:
  - Keep sorted for human lookup. At runtime, a hash table is used.
  - do **NOT** conditionally (#ifdef, #ifndef) define a function *NAME*:
    doing so will cause user code that works against a --without-XYZ binary
    to fail with name collisions against a --with-XYZ binary.
    Use something similar to GEOM_BUILDER instead.
  - keep 1 line per entry, it makes grep | sort easier
*/

static Native_func_registry func_array[] =
{
4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926
  { { C_STRING_WITH_LEN("ABS") }, BUILDER(Create_func_abs)},
  { { C_STRING_WITH_LEN("ACOS") }, BUILDER(Create_func_acos)},
  { { C_STRING_WITH_LEN("ADDTIME") }, BUILDER(Create_func_addtime)},
  { { C_STRING_WITH_LEN("AES_DECRYPT") }, BUILDER(Create_func_aes_decrypt)},
  { { C_STRING_WITH_LEN("AES_ENCRYPT") }, BUILDER(Create_func_aes_encrypt)},
  { { C_STRING_WITH_LEN("AREA") }, GEOM_BUILDER(Create_func_area)},
  { { C_STRING_WITH_LEN("ASBINARY") }, GEOM_BUILDER(Create_func_as_wkb)},
  { { C_STRING_WITH_LEN("ASIN") }, BUILDER(Create_func_asin)},
  { { C_STRING_WITH_LEN("ASTEXT") }, GEOM_BUILDER(Create_func_as_wkt)},
  { { C_STRING_WITH_LEN("ASWKB") }, GEOM_BUILDER(Create_func_as_wkb)},
  { { C_STRING_WITH_LEN("ASWKT") }, GEOM_BUILDER(Create_func_as_wkt)},
  { { C_STRING_WITH_LEN("ATAN") }, BUILDER(Create_func_atan)},
  { { C_STRING_WITH_LEN("ATAN2") }, BUILDER(Create_func_atan)},
  { { C_STRING_WITH_LEN("BENCHMARK") }, BUILDER(Create_func_benchmark)},
  { { C_STRING_WITH_LEN("BIN") }, BUILDER(Create_func_bin)},
  { { C_STRING_WITH_LEN("BIT_COUNT") }, BUILDER(Create_func_bit_count)},
  { { C_STRING_WITH_LEN("BIT_LENGTH") }, BUILDER(Create_func_bit_length)},
  { { C_STRING_WITH_LEN("CEIL") }, BUILDER(Create_func_ceiling)},
  { { C_STRING_WITH_LEN("CEILING") }, BUILDER(Create_func_ceiling)},
  { { C_STRING_WITH_LEN("CENTROID") }, GEOM_BUILDER(Create_func_centroid)},
  { { C_STRING_WITH_LEN("CHARACTER_LENGTH") }, BUILDER(Create_func_char_length)},
  { { C_STRING_WITH_LEN("CHAR_LENGTH") }, BUILDER(Create_func_char_length)},
  { { C_STRING_WITH_LEN("COERCIBILITY") }, BUILDER(Create_func_coercibility)},
  { { C_STRING_WITH_LEN("COMPRESS") }, BUILDER(Create_func_compress)},
  { { C_STRING_WITH_LEN("CONCAT") }, BUILDER(Create_func_concat)},
  { { C_STRING_WITH_LEN("CONCAT_WS") }, BUILDER(Create_func_concat_ws)},
  { { C_STRING_WITH_LEN("CONNECTION_ID") }, BUILDER(Create_func_connection_id)},
  { { C_STRING_WITH_LEN("CONV") }, BUILDER(Create_func_conv)},
  { { C_STRING_WITH_LEN("CONVERT_TZ") }, BUILDER(Create_func_convert_tz)},
  { { C_STRING_WITH_LEN("COS") }, BUILDER(Create_func_cos)},
  { { C_STRING_WITH_LEN("COT") }, BUILDER(Create_func_cot)},
  { { C_STRING_WITH_LEN("CRC32") }, BUILDER(Create_func_crc32)},
  { { C_STRING_WITH_LEN("CROSSES") }, GEOM_BUILDER(Create_func_crosses)},
  { { C_STRING_WITH_LEN("DATEDIFF") }, BUILDER(Create_func_datediff)},
  { { C_STRING_WITH_LEN("DATE_FORMAT") }, BUILDER(Create_func_date_format)},
  { { C_STRING_WITH_LEN("DAYNAME") }, BUILDER(Create_func_dayname)},
  { { C_STRING_WITH_LEN("DAYOFMONTH") }, BUILDER(Create_func_dayofmonth)},
  { { C_STRING_WITH_LEN("DAYOFWEEK") }, BUILDER(Create_func_dayofweek)},
  { { C_STRING_WITH_LEN("DAYOFYEAR") }, BUILDER(Create_func_dayofyear)},
  { { C_STRING_WITH_LEN("DECODE") }, BUILDER(Create_func_decode)},
  { { C_STRING_WITH_LEN("DEGREES") }, BUILDER(Create_func_degrees)},
  { { C_STRING_WITH_LEN("DES_DECRYPT") }, BUILDER(Create_func_des_decrypt)},
  { { C_STRING_WITH_LEN("DES_ENCRYPT") }, BUILDER(Create_func_des_encrypt)},
  { { C_STRING_WITH_LEN("DIMENSION") }, GEOM_BUILDER(Create_func_dimension)},
  { { C_STRING_WITH_LEN("DISJOINT") }, GEOM_BUILDER(Create_func_disjoint)},
  { { C_STRING_WITH_LEN("ELT") }, BUILDER(Create_func_elt)},
  { { C_STRING_WITH_LEN("ENCODE") }, BUILDER(Create_func_encode)},
  { { C_STRING_WITH_LEN("ENCRYPT") }, BUILDER(Create_func_encrypt)},
  { { C_STRING_WITH_LEN("ENDPOINT") }, GEOM_BUILDER(Create_func_endpoint)},
  { { C_STRING_WITH_LEN("ENVELOPE") }, GEOM_BUILDER(Create_func_envelope)},
  { { C_STRING_WITH_LEN("EQUALS") }, GEOM_BUILDER(Create_func_equals)},
  { { C_STRING_WITH_LEN("EXP") }, BUILDER(Create_func_exp)},
  { { C_STRING_WITH_LEN("EXPORT_SET") }, BUILDER(Create_func_export_set)},
  { { C_STRING_WITH_LEN("EXTERIORRING") }, GEOM_BUILDER(Create_func_exteriorring)},
  { { C_STRING_WITH_LEN("EXTRACTVALUE") }, BUILDER(Create_func_xml_extractvalue)},
  { { C_STRING_WITH_LEN("FIELD") }, BUILDER(Create_func_field)},
  { { C_STRING_WITH_LEN("FIND_IN_SET") }, BUILDER(Create_func_find_in_set)},
  { { C_STRING_WITH_LEN("FLOOR") }, BUILDER(Create_func_floor)},
  { { C_STRING_WITH_LEN("FORMAT") }, BUILDER(Create_func_format)},
  { { C_STRING_WITH_LEN("FOUND_ROWS") }, BUILDER(Create_func_found_rows)},
  { { C_STRING_WITH_LEN("FROM_DAYS") }, BUILDER(Create_func_from_days)},
  { { C_STRING_WITH_LEN("FROM_UNIXTIME") }, BUILDER(Create_func_from_unixtime)},
  { { C_STRING_WITH_LEN("GEOMCOLLFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("GEOMCOLLFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("GEOMETRYCOLLECTIONFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("GEOMETRYCOLLECTIONFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("GEOMETRYFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("GEOMETRYFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("GEOMETRYN") }, GEOM_BUILDER(Create_func_geometryn)},
  { { C_STRING_WITH_LEN("GEOMETRYTYPE") }, GEOM_BUILDER(Create_func_geometry_type)},
  { { C_STRING_WITH_LEN("GEOMFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("GEOMFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("GET_LOCK") }, BUILDER(Create_func_get_lock)},
  { { C_STRING_WITH_LEN("GLENGTH") }, GEOM_BUILDER(Create_func_glength)},
  { { C_STRING_WITH_LEN("GREATEST") }, BUILDER(Create_func_greatest)},
  { { C_STRING_WITH_LEN("HEX") }, BUILDER(Create_func_hex)},
  { { C_STRING_WITH_LEN("IFNULL") }, BUILDER(Create_func_ifnull)},
  { { C_STRING_WITH_LEN("INET_ATON") }, BUILDER(Create_func_inet_aton)},
  { { C_STRING_WITH_LEN("INET_NTOA") }, BUILDER(Create_func_inet_ntoa)},
  { { C_STRING_WITH_LEN("INSTR") }, BUILDER(Create_func_instr)},
  { { C_STRING_WITH_LEN("INTERIORRINGN") }, GEOM_BUILDER(Create_func_interiorringn)},
  { { C_STRING_WITH_LEN("INTERSECTS") }, GEOM_BUILDER(Create_func_intersects)},
  { { C_STRING_WITH_LEN("ISCLOSED") }, GEOM_BUILDER(Create_func_isclosed)},
  { { C_STRING_WITH_LEN("ISEMPTY") }, GEOM_BUILDER(Create_func_isempty)},
  { { C_STRING_WITH_LEN("ISNULL") }, BUILDER(Create_func_isnull)},
  { { C_STRING_WITH_LEN("ISSIMPLE") }, GEOM_BUILDER(Create_func_issimple)},
  { { C_STRING_WITH_LEN("IS_FREE_LOCK") }, BUILDER(Create_func_is_free_lock)},
  { { C_STRING_WITH_LEN("IS_USED_LOCK") }, BUILDER(Create_func_is_used_lock)},
  { { C_STRING_WITH_LEN("LAST_DAY") }, BUILDER(Create_func_last_day)},
  { { C_STRING_WITH_LEN("LAST_INSERT_ID") }, BUILDER(Create_func_last_insert_id)},
  { { C_STRING_WITH_LEN("LCASE") }, BUILDER(Create_func_lcase)},
  { { C_STRING_WITH_LEN("LEAST") }, BUILDER(Create_func_least)},
  { { C_STRING_WITH_LEN("LENGTH") }, BUILDER(Create_func_length)},
  { { C_STRING_WITH_LEN("LINEFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("LINEFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("LINESTRINGFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("LINESTRINGFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("LN") }, BUILDER(Create_func_ln)},
  { { C_STRING_WITH_LEN("LOAD_FILE") }, BUILDER(Create_func_load_file)},
  { { C_STRING_WITH_LEN("LOCATE") }, BUILDER(Create_func_locate)},
  { { C_STRING_WITH_LEN("LOG") }, BUILDER(Create_func_log)},
  { { C_STRING_WITH_LEN("LOG10") }, BUILDER(Create_func_log10)},
  { { C_STRING_WITH_LEN("LOG2") }, BUILDER(Create_func_log2)},
  { { C_STRING_WITH_LEN("LOWER") }, BUILDER(Create_func_lcase)},
  { { C_STRING_WITH_LEN("LPAD") }, BUILDER(Create_func_lpad)},
  { { C_STRING_WITH_LEN("LTRIM") }, BUILDER(Create_func_ltrim)},
  { { C_STRING_WITH_LEN("MAKEDATE") }, BUILDER(Create_func_makedate)},
  { { C_STRING_WITH_LEN("MAKETIME") }, BUILDER(Create_func_maketime)},
  { { C_STRING_WITH_LEN("MAKE_SET") }, BUILDER(Create_func_make_set)},
  { { C_STRING_WITH_LEN("MASTER_POS_WAIT") }, BUILDER(Create_func_master_pos_wait)},
  { { C_STRING_WITH_LEN("MBRCONTAINS") }, GEOM_BUILDER(Create_func_contains)},
  { { C_STRING_WITH_LEN("MBRDISJOINT") }, GEOM_BUILDER(Create_func_disjoint)},
  { { C_STRING_WITH_LEN("MBREQUAL") }, GEOM_BUILDER(Create_func_equals)},
  { { C_STRING_WITH_LEN("MBRINTERSECTS") }, GEOM_BUILDER(Create_func_intersects)},
  { { C_STRING_WITH_LEN("MBROVERLAPS") }, GEOM_BUILDER(Create_func_overlaps)},
  { { C_STRING_WITH_LEN("MBRTOUCHES") }, GEOM_BUILDER(Create_func_touches)},
  { { C_STRING_WITH_LEN("MBRWITHIN") }, GEOM_BUILDER(Create_func_within)},
  { { C_STRING_WITH_LEN("MD5") }, BUILDER(Create_func_md5)},
  { { C_STRING_WITH_LEN("MLINEFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("MLINEFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("MONTHNAME") }, BUILDER(Create_func_monthname)},
  { { C_STRING_WITH_LEN("MPOINTFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("MPOINTFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("MPOLYFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("MPOLYFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("MULTILINESTRINGFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("MULTILINESTRINGFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("MULTIPOINTFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("MULTIPOINTFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("MULTIPOLYGONFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("MULTIPOLYGONFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("NAME_CONST") }, BUILDER(Create_func_name_const)},
  { { C_STRING_WITH_LEN("NULLIF") }, BUILDER(Create_func_nullif)},
  { { C_STRING_WITH_LEN("NUMGEOMETRIES") }, GEOM_BUILDER(Create_func_numgeometries)},
  { { C_STRING_WITH_LEN("NUMINTERIORRINGS") }, GEOM_BUILDER(Create_func_numinteriorring)},
  { { C_STRING_WITH_LEN("NUMPOINTS") }, GEOM_BUILDER(Create_func_numpoints)},
  { { C_STRING_WITH_LEN("OCT") }, BUILDER(Create_func_oct)},
  { { C_STRING_WITH_LEN("OCTET_LENGTH") }, BUILDER(Create_func_length)},
  { { C_STRING_WITH_LEN("ORD") }, BUILDER(Create_func_ord)},
  { { C_STRING_WITH_LEN("OVERLAPS") }, GEOM_BUILDER(Create_func_overlaps)},
  { { C_STRING_WITH_LEN("PERIOD_ADD") }, BUILDER(Create_func_period_add)},
  { { C_STRING_WITH_LEN("PERIOD_DIFF") }, BUILDER(Create_func_period_diff)},
  { { C_STRING_WITH_LEN("PI") }, BUILDER(Create_func_pi)},
  { { C_STRING_WITH_LEN("POINTFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("POINTFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("POINTN") }, GEOM_BUILDER(Create_func_pointn)},
  { { C_STRING_WITH_LEN("POLYFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("POLYFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("POLYGONFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
  { { C_STRING_WITH_LEN("POLYGONFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
  { { C_STRING_WITH_LEN("POW") }, BUILDER(Create_func_pow)},
  { { C_STRING_WITH_LEN("POWER") }, BUILDER(Create_func_pow)},
  { { C_STRING_WITH_LEN("QUOTE") }, BUILDER(Create_func_quote)},
  { { C_STRING_WITH_LEN("RADIANS") }, BUILDER(Create_func_radians)},
  { { C_STRING_WITH_LEN("RAND") }, BUILDER(Create_func_rand)},
  { { C_STRING_WITH_LEN("RELEASE_LOCK") }, BUILDER(Create_func_release_lock)},
  { { C_STRING_WITH_LEN("REVERSE") }, BUILDER(Create_func_reverse)},
  { { C_STRING_WITH_LEN("ROUND") }, BUILDER(Create_func_round)},
  { { C_STRING_WITH_LEN("ROW_COUNT") }, BUILDER(Create_func_row_count)},
  { { C_STRING_WITH_LEN("RPAD") }, BUILDER(Create_func_rpad)},
  { { C_STRING_WITH_LEN("RTRIM") }, BUILDER(Create_func_rtrim)},
  { { C_STRING_WITH_LEN("SEC_TO_TIME") }, BUILDER(Create_func_sec_to_time)},
  { { C_STRING_WITH_LEN("SHA") }, BUILDER(Create_func_sha)},
  { { C_STRING_WITH_LEN("SHA1") }, BUILDER(Create_func_sha)},
  { { C_STRING_WITH_LEN("SIGN") }, BUILDER(Create_func_sign)},
  { { C_STRING_WITH_LEN("SIN") }, BUILDER(Create_func_sin)},
  { { C_STRING_WITH_LEN("SLEEP") }, BUILDER(Create_func_sleep)},
  { { C_STRING_WITH_LEN("SOUNDEX") }, BUILDER(Create_func_soundex)},
  { { C_STRING_WITH_LEN("SPACE") }, BUILDER(Create_func_space)},
  { { C_STRING_WITH_LEN("SQRT") }, BUILDER(Create_func_sqrt)},
  { { C_STRING_WITH_LEN("SRID") }, GEOM_BUILDER(Create_func_srid)},
  { { C_STRING_WITH_LEN("STARTPOINT") }, GEOM_BUILDER(Create_func_startpoint)},
  { { C_STRING_WITH_LEN("STRCMP") }, BUILDER(Create_func_strcmp)},
  { { C_STRING_WITH_LEN("STR_TO_DATE") }, BUILDER(Create_func_str_to_date)},
  { { C_STRING_WITH_LEN("SUBSTRING_INDEX") }, BUILDER(Create_func_substr_index)},
  { { C_STRING_WITH_LEN("SUBTIME") }, BUILDER(Create_func_subtime)},
  { { C_STRING_WITH_LEN("TAN") }, BUILDER(Create_func_tan)},
  { { C_STRING_WITH_LEN("TIMEDIFF") }, BUILDER(Create_func_timediff)},
  { { C_STRING_WITH_LEN("TIME_FORMAT") }, BUILDER(Create_func_time_format)},
  { { C_STRING_WITH_LEN("TIME_TO_SEC") }, BUILDER(Create_func_time_to_sec)},
  { { C_STRING_WITH_LEN("TOUCHES") }, GEOM_BUILDER(Create_func_touches)},
  { { C_STRING_WITH_LEN("TO_DAYS") }, BUILDER(Create_func_to_days)},
  { { C_STRING_WITH_LEN("UCASE") }, BUILDER(Create_func_ucase)},
  { { C_STRING_WITH_LEN("UNCOMPRESS") }, BUILDER(Create_func_uncompress)},
  { { C_STRING_WITH_LEN("UNCOMPRESSED_LENGTH") }, BUILDER(Create_func_uncompressed_length)},
  { { C_STRING_WITH_LEN("UNHEX") }, BUILDER(Create_func_unhex)},
  { { C_STRING_WITH_LEN("UNIX_TIMESTAMP") }, BUILDER(Create_func_unix_timestamp)},
  { { C_STRING_WITH_LEN("UPDATEXML") }, BUILDER(Create_func_xml_update)},
  { { C_STRING_WITH_LEN("UPPER") }, BUILDER(Create_func_ucase)},
  { { C_STRING_WITH_LEN("UUID") }, BUILDER(Create_func_uuid)},
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  { { C_STRING_WITH_LEN("UUID_SHORT") }, BUILDER(Create_func_uuid_short)},
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  { { C_STRING_WITH_LEN("VERSION") }, BUILDER(Create_func_version)},
  { { C_STRING_WITH_LEN("WEEKDAY") }, BUILDER(Create_func_weekday)},
  { { C_STRING_WITH_LEN("WEEKOFYEAR") }, BUILDER(Create_func_weekofyear)},
  { { C_STRING_WITH_LEN("WITHIN") }, GEOM_BUILDER(Create_func_within)},
  { { C_STRING_WITH_LEN("X") }, GEOM_BUILDER(Create_func_x)},
  { { C_STRING_WITH_LEN("Y") }, GEOM_BUILDER(Create_func_y)},
  { { C_STRING_WITH_LEN("YEARWEEK") }, BUILDER(Create_func_year_week)},
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  { {0, 0}, NULL}
};

static HASH native_functions_hash;

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extern "C" uchar*
get_native_fct_hash_key(const uchar *buff, size_t *length,
                        my_bool /* unused */)
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{
  Native_func_registry *func= (Native_func_registry*) buff;
  *length= func->name.length;
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  return (uchar*) func->name.str;
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}

/*
  Load the hash table for native functions.
  Note: this code is not thread safe, and is intended to be used at server
  startup only (before going multi-threaded)
*/

int item_create_init()
{
  Native_func_registry *func;

  DBUG_ENTER("item_create_init");

  if (hash_init(& native_functions_hash,
                system_charset_info,
                array_elements(func_array),
                0,
                0,
                (hash_get_key) get_native_fct_hash_key,
                NULL,                          /* Nothing to free */
                MYF(0)))
    DBUG_RETURN(1);

  for (func= func_array; func->builder != NULL; func++)
  {
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    if (my_hash_insert(& native_functions_hash, (uchar*) func))
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      DBUG_RETURN(1);
  }
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#ifndef DBUG_OFF
  for (uint i=0 ; i < native_functions_hash.records ; i++)
  {
    func= (Native_func_registry*) hash_element(& native_functions_hash, i);
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    DBUG_PRINT("info", ("native function: %s  length: %u",
                        func->name.str, (uint) func->name.length));
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  }
#endif
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  DBUG_RETURN(0);
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}

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/*
  Empty the hash table for native functions.
  Note: this code is not thread safe, and is intended to be used at server
  shutdown only (after thread requests have been executed).
*/
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void item_create_cleanup()
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{
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  DBUG_ENTER("item_create_cleanup");
  hash_free(& native_functions_hash);
  DBUG_VOID_RETURN;
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}

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Create_func *
find_native_function_builder(THD *thd, LEX_STRING name)
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{
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  Native_func_registry *func;
  Create_func *builder= NULL;
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  /* Thread safe */
  func= (Native_func_registry*) hash_search(& native_functions_hash,
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                                            (uchar*) name.str,
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                                             name.length);
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  if (func)
  {
    builder= func->builder;
  }
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  return builder;
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}

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Create_qfunc *
find_qualified_function_builder(THD *thd)
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{
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  return & Create_sp_func::s_singleton;
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}
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Item *
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create_func_cast(THD *thd, Item *a, Cast_target cast_type,
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                 const char *c_len, const char *c_dec,
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                 CHARSET_INFO *cs)
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{
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  Item *res;
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  ulong len;
  uint dec;
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  LINT_INIT(res);
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  switch (cast_type) {
  case ITEM_CAST_BINARY:
    res= new (thd->mem_root) Item_func_binary(a);
    break;
  case ITEM_CAST_SIGNED_INT:
    res= new (thd->mem_root) Item_func_signed(a);
    break;
  case ITEM_CAST_UNSIGNED_INT:
    res= new (thd->mem_root) Item_func_unsigned(a);
    break;
  case ITEM_CAST_DATE:
    res= new (thd->mem_root) Item_date_typecast(a);
    break;
  case ITEM_CAST_TIME:
    res= new (thd->mem_root) Item_time_typecast(a);
    break;
  case ITEM_CAST_DATETIME:
    res= new (thd->mem_root) Item_datetime_typecast(a);
    break;
  case ITEM_CAST_DECIMAL:
  {
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    if (c_len == NULL)
    {
      len= 0;
    }
    else
    {
      ulong decoded_size;
      errno= 0;
      decoded_size= strtoul(c_len, NULL, 10);
      if (errno != 0)
      {
        my_error(ER_TOO_BIG_PRECISION, MYF(0), c_len, a->name,
                 DECIMAL_MAX_PRECISION);
        return NULL;
      }
      len= decoded_size;
    }

    if (c_dec == NULL)
    {
      dec= 0;
    }
    else
    {
      ulong decoded_size;
      errno= 0;
      decoded_size= strtoul(c_dec, NULL, 10);
      if ((errno != 0) || (decoded_size > UINT_MAX))
      {
        my_error(ER_TOO_BIG_SCALE, MYF(0), c_dec, a->name,
                 DECIMAL_MAX_SCALE);
        return NULL;
      }
      dec= decoded_size;
    }
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    my_decimal_trim(&len, &dec);
    if (len < dec)
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    {
      my_error(ER_M_BIGGER_THAN_D, MYF(0), "");
      return 0;
    }
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    if (len > DECIMAL_MAX_PRECISION)
    {
      my_error(ER_TOO_BIG_PRECISION, MYF(0), len, a->name,
               DECIMAL_MAX_PRECISION);
      return 0;
    }
    if (dec > DECIMAL_MAX_SCALE)
    {
      my_error(ER_TOO_BIG_SCALE, MYF(0), dec, a->name,
               DECIMAL_MAX_SCALE);
      return 0;
    }
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    res= new (thd->mem_root) Item_decimal_typecast(a, len, dec);
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    break;
  }
  case ITEM_CAST_CHAR:
  {
    CHARSET_INFO *real_cs= (cs ? cs : thd->variables.collation_connection);
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    if (c_len == NULL)
    {
      len= LL(-1);
    }
    else
    {
      ulong decoded_size;
      errno= 0;
      decoded_size= strtoul(c_len, NULL, 10);
      if (errno != 0)
      {
        my_error(ER_TOO_BIG_DISPLAYWIDTH, MYF(0), "cast as char", MAX_FIELD_BLOBLENGTH);
        return NULL;
      }
      len= decoded_size;
    }
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    res= new (thd->mem_root) Item_char_typecast(a, len, real_cs);
    break;
  }
  default:
  {
    DBUG_ASSERT(0);
    res= 0;
    break;
  }
  }
  return res;
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}