sql_trigger.cc 46.9 KB
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/* Copyright (C) 2004-2005 MySQL AB

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

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

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


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#define MYSQL_LEX 1
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#include "mysql_priv.h"
#include "sp_head.h"
#include "sql_trigger.h"
#include "parse_file.h"

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static const LEX_STRING triggers_file_type=
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  {(char *) STRING_WITH_LEN("TRIGGERS")};
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const char * const triggers_file_ext= ".TRG";
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/*
  Table of .TRG file field descriptors.
  We have here only one field now because in nearest future .TRG
  files will be merged into .FRM files (so we don't need something
  like md5 or created fields).
*/
static File_option triggers_file_parameters[]=
{
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  {
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    {(char *) STRING_WITH_LEN("triggers") },
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    offsetof(class Table_triggers_list, definitions_list),
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    FILE_OPTIONS_STRLIST
  },
  {
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    {(char *) STRING_WITH_LEN("sql_modes") },
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    offsetof(class Table_triggers_list, definition_modes_list),
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    FILE_OPTIONS_ULLLIST
  },
  {
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    {(char *) STRING_WITH_LEN("definers") },
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    offsetof(class Table_triggers_list, definers_list),
    FILE_OPTIONS_STRLIST
  },
  { { 0, 0 }, 0, FILE_OPTIONS_STRING }
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};

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File_option sql_modes_parameters=
{
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  {(char*) STRING_WITH_LEN("sql_modes") },
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  offsetof(class Table_triggers_list, definition_modes_list),
  FILE_OPTIONS_ULLLIST
};

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/*
  This must be kept up to date whenever a new option is added to the list
  above, as it specifies the number of required parameters of the trigger in
  .trg file.
*/

static const int TRG_NUM_REQUIRED_PARAMETERS= 4;
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/*
  Structure representing contents of .TRN file which are used to support
  database wide trigger namespace.
*/

struct st_trigname
{
  LEX_STRING trigger_table;
};

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static const LEX_STRING trigname_file_type=
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  {(char *) STRING_WITH_LEN("TRIGGERNAME")};
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const char * const trigname_file_ext= ".TRN";

static File_option trigname_file_parameters[]=
{
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  {
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    {(char *) STRING_WITH_LEN("trigger_table")},
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    offsetof(struct st_trigname, trigger_table),
   FILE_OPTIONS_ESTRING
  },
  { { 0, 0 }, 0, FILE_OPTIONS_STRING }
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};


const LEX_STRING trg_action_time_type_names[]=
{
  { (char *) STRING_WITH_LEN("BEFORE") },
  { (char *) STRING_WITH_LEN("AFTER") }
};

const LEX_STRING trg_event_type_names[]=
{
  { (char *) STRING_WITH_LEN("INSERT") },
  { (char *) STRING_WITH_LEN("UPDATE") },
  { (char *) STRING_WITH_LEN("DELETE") }
};


static TABLE_LIST *add_table_for_trigger(THD *thd, sp_name *trig);

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bool handle_old_incorrect_sql_modes(char *&unknown_key, gptr base,
                                    MEM_ROOT *mem_root,
                                    char *end, gptr hook_data);

class Handle_old_incorrect_sql_modes_hook: public Unknown_key_hook
{
private:
  char *path;
public:
  Handle_old_incorrect_sql_modes_hook(char *file_path)
    :path(file_path)
  {};
  virtual bool process_unknown_string(char *&unknown_key, gptr base,
                                      MEM_ROOT *mem_root, char *end);
};
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/*
  Create or drop trigger for table.

  SYNOPSIS
    mysql_create_or_drop_trigger()
      thd    - current thread context (including trigger definition in LEX)
      tables - table list containing one table for which trigger is created.
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      create - whenever we create (TRUE) or drop (FALSE) trigger
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  NOTE
    This function is mainly responsible for opening and locking of table and
    invalidation of all its instances in table cache after trigger creation.
    Real work on trigger creation/dropping is done inside Table_triggers_list
    methods.

  RETURN VALUE
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    FALSE Success
    TRUE  error
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*/
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bool mysql_create_or_drop_trigger(THD *thd, TABLE_LIST *tables, bool create)
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{
  TABLE *table;
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  bool result= TRUE;
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  LEX_STRING definer_user;
  LEX_STRING definer_host;

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  DBUG_ENTER("mysql_create_or_drop_trigger");

  /*
    QQ: This function could be merged in mysql_alter_table() function
    But do we want this ?
  */

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  /*
    Note that once we will have check for TRIGGER privilege in place we won't
    need second part of condition below, since check_access() function also
    checks that db is specified.
  */
  if (!thd->lex->spname->m_db.length || create && !tables->db_length)
  {
    my_error(ER_NO_DB_ERROR, MYF(0));
    DBUG_RETURN(TRUE);
  }

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  if (!create &&
      !(tables= add_table_for_trigger(thd, thd->lex->spname)))
    DBUG_RETURN(TRUE);

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  /* We should have only one table in table list. */
  DBUG_ASSERT(tables->next_global == 0);

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  /*
    TODO: We should check if user has TRIGGER privilege for table here.
    Now we just require SUPER privilege for creating/dropping because
    we don't have proper privilege checking for triggers in place yet.
  */
  if (check_global_access(thd, SUPER_ACL))
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    DBUG_RETURN(TRUE);
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  /*
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    There is no DETERMINISTIC clause for triggers, so can't check it.
    But a trigger can in theory be used to do nasty things (if it supported
    DROP for example) so we do the check for privileges. For now there is
    already a stronger test right above; but when this stronger test will
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    be removed, the test below will hold. Because triggers have the same
    nature as functions regarding binlogging: their body is implicitely
    binlogged, so they share the same danger, so trust_function_creators
    applies to them too.
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  */
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  if (!trust_function_creators && mysql_bin_log.is_open() &&
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      !(thd->security_ctx->master_access & SUPER_ACL))
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  {
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    my_error(ER_BINLOG_CREATE_ROUTINE_NEED_SUPER, MYF(0));
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    DBUG_RETURN(TRUE);
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  }

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  /* We do not allow creation of triggers on temporary tables. */
  if (create && find_temporary_table(thd, tables->db, tables->table_name))
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  {
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    my_error(ER_TRG_ON_VIEW_OR_TEMP_TABLE, MYF(0), tables->alias);
    DBUG_RETURN(TRUE);
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  }

  /*
    We don't want perform our operations while global read lock is held
    so we have to wait until its end and then prevent it from occuring
    again until we are done. (Acquiring LOCK_open is not enough because
    global read lock is held without helding LOCK_open).
  */
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  if (wait_if_global_read_lock(thd, 0, 1))
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    DBUG_RETURN(TRUE);
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  VOID(pthread_mutex_lock(&LOCK_open));

  if (lock_table_names(thd, tables))
    goto end;

  /* We also don't allow creation of triggers on views. */
  tables->required_type= FRMTYPE_TABLE;

  if (reopen_name_locked_table(thd, tables))
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  {
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    unlock_table_name(thd, tables);
    goto end;
  }
  table= tables->table;

  if (!table->triggers)
  {
    if (!create)
    {
      my_error(ER_TRG_DOES_NOT_EXIST, MYF(0));
      goto end;
    }

    if (!(table->triggers= new (&table->mem_root) Table_triggers_list(table)))
      goto end;
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  }

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  result= (create ?
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           table->triggers->create_trigger(thd, tables, &definer_user, &definer_host):
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           table->triggers->drop_trigger(thd, tables));
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end:
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  VOID(pthread_mutex_unlock(&LOCK_open));
  start_waiting_global_read_lock(thd);

  if (!result)
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  {
    if (mysql_bin_log.is_open())
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    {
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      thd->clear_error();

      String log_query(thd->query, thd->query_length, system_charset_info);

      if (create)
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      {
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        log_query.set((char *) 0, 0, system_charset_info); /* reset log_query */

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        log_query.append(STRING_WITH_LEN("CREATE "));
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        if (definer_user.str && definer_host.str)
        {
          /*
            Append definer-clause if the trigger is SUID (a usual trigger in
            new MySQL versions).
          */

          append_definer(thd, &log_query, &definer_user, &definer_host);
        }

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        log_query.append(thd->lex->stmt_definition_begin);
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      }
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      /* Such a statement can always go directly to binlog, no trans cache. */
      Query_log_event qinfo(thd, log_query.ptr(), log_query.length(), 0, FALSE);
      mysql_bin_log.write(&qinfo);
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    }
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    send_ok(thd);
  }

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  DBUG_RETURN(result);
}


/*
  Create trigger for table.

  SYNOPSIS
    create_trigger()
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      thd          - current thread context (including trigger definition in
                     LEX)
      tables       - table list containing one open table for which the
                     trigger is created.
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      definer_user - [out] after a call it points to 0-terminated string or
                     contains the NULL-string:
                       - 0-terminated is returned if the trigger is SUID. The
                         string contains user name part of the actual trigger
                         definer.
                       - NULL-string is returned if the trigger is non-SUID.
                     Anyway, the caller is responsible to provide memory for
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                     storing LEX_STRING object.
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      definer_host - [out] after a call it points to 0-terminated string or
                     contains the NULL-string:
                       - 0-terminated string is returned if the trigger is
                         SUID. The string contains host name part of the
                         actual trigger definer.
                       - NULL-string is returned if the trigger is non-SUID.
                     Anyway, the caller is responsible to provide memory for
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                     storing LEX_STRING object.
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  NOTE
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    - Assumes that trigger name is fully qualified.
    - NULL-string means the following LEX_STRING instance:
      { str = 0; length = 0 }.
    - In other words, definer_user and definer_host should contain
      simultaneously NULL-strings (non-SUID/old trigger) or valid strings
      (SUID/new trigger).
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  RETURN VALUE
    False - success
    True  - error
*/
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bool Table_triggers_list::create_trigger(THD *thd, TABLE_LIST *tables,
                                         LEX_STRING *definer_user,
                                         LEX_STRING *definer_host)
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{
  LEX *lex= thd->lex;
  TABLE *table= tables->table;
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  char dir_buff[FN_REFLEN], file_buff[FN_REFLEN], trigname_buff[FN_REFLEN],
       trigname_path[FN_REFLEN];
  LEX_STRING dir, file, trigname_file;
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  LEX_STRING *trg_def, *name;
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  ulonglong *trg_sql_mode;
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  char trg_definer_holder[USER_HOST_BUFF_SIZE];
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  LEX_STRING *trg_definer;
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  Item_trigger_field *trg_field;
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  struct st_trigname trigname;
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  /* Trigger must be in the same schema as target table. */
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  if (my_strcasecmp(table_alias_charset, table->s->db, lex->spname->m_db.str))
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  {
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    my_error(ER_TRG_IN_WRONG_SCHEMA, MYF(0));
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    return 1;
  }

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  /* We don't allow creation of several triggers of the same type yet */
  if (bodies[lex->trg_chistics.event][lex->trg_chistics.action_time])
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  {
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    my_message(ER_TRG_ALREADY_EXISTS, ER(ER_TRG_ALREADY_EXISTS), MYF(0));
    return 1;
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  }

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  if (!lex->definer)
  {
    /*
      DEFINER-clause is missing.

      If we are in slave thread, this means that we received CREATE TRIGGER
      from the master, that does not support definer in triggers. So, we
      should mark this trigger as non-SUID. Note that this does not happen
      when we parse triggers' definitions during opening .TRG file.
      LEX::definer is ignored in that case.

      Otherwise, we should use CURRENT_USER() as definer.

      NOTE: when CREATE TRIGGER statement is allowed to be executed in PS/SP,
      it will be required to create the definer below in persistent MEM_ROOT
      of PS/SP.
    */
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    if (!thd->slave_thread)
    {
      if (!(lex->definer= create_default_definer(thd)))
        return 1;
    }
  }
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  /*
    If the specified definer differs from the current user, we should check
    that the current user has SUPER privilege (in order to create trigger
    under another user one must have SUPER privilege).
  */
  
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  if (lex->definer &&
      (strcmp(lex->definer->user.str, thd->security_ctx->priv_user) ||
       my_strcasecmp(system_charset_info,
                     lex->definer->host.str,
                     thd->security_ctx->priv_host)))
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  {
    if (check_global_access(thd, SUPER_ACL))
    {
      my_error(ER_SPECIFIC_ACCESS_DENIED_ERROR, MYF(0), "SUPER");
      return TRUE;
    }
  }

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  /*
    Let us check if all references to fields in old/new versions of row in
    this trigger are ok.

    NOTE: We do it here more from ease of use standpoint. We still have to
    do some checks on each execution. E.g. we can catch privilege changes
    only during execution. Also in near future, when we will allow access
    to other tables from trigger we won't be able to catch changes in other
    tables...

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    Since we don't plan to access to contents of the fields it does not
    matter that we choose for both OLD and NEW values the same versions
    of Field objects here.
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  */
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  old_field= new_field= table->field;
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  for (trg_field= (Item_trigger_field *)(lex->trg_table_fields.first);
       trg_field; trg_field= trg_field->next_trg_field)
  {
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    /*
      NOTE: now we do not check privileges at CREATE TRIGGER time. This will
      be changed in the future.
    */
    trg_field->setup_field(thd, table, NULL);

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    if (!trg_field->fixed &&
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        trg_field->fix_fields(thd, (Item **)0))
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      return 1;
  }

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  /*
    Here we are creating file with triggers and save all triggers in it.
    sql_create_definition_file() files handles renaming and backup of older
    versions
  */
  strxnmov(dir_buff, FN_REFLEN, mysql_data_home, "/", tables->db, "/", NullS);
  dir.length= unpack_filename(dir_buff, dir_buff);
  dir.str= dir_buff;
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  file.length=  strxnmov(file_buff, FN_REFLEN, tables->table_name,
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                         triggers_file_ext, NullS) - file_buff;
  file.str= file_buff;
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  trigname_file.length= strxnmov(trigname_buff, FN_REFLEN,
                                 lex->spname->m_name.str,
                                 trigname_file_ext, NullS) - trigname_buff;
  trigname_file.str= trigname_buff;
  strxnmov(trigname_path, FN_REFLEN, dir_buff, trigname_buff, NullS);

  /* Use the filesystem to enforce trigger namespace constraints. */
  if (!access(trigname_path, F_OK))
  {
    my_error(ER_TRG_ALREADY_EXISTS, MYF(0));
    return 1;
  }

  trigname.trigger_table.str= tables->table_name;
  trigname.trigger_table.length= tables->table_name_length;

  if (sql_create_definition_file(&dir, &trigname_file, &trigname_file_type,
                                 (gptr)&trigname, trigname_file_parameters, 0))
    return 1;
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  /*
    Soon we will invalidate table object and thus Table_triggers_list object
    so don't care about place to which trg_def->ptr points and other
    invariants (e.g. we don't bother to update names_list)

    QQ: Hmm... probably we should not care about setting up active thread
        mem_root too.
  */
  if (!(trg_def= (LEX_STRING *)alloc_root(&table->mem_root,
                                          sizeof(LEX_STRING))) ||
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      definitions_list.push_back(trg_def, &table->mem_root) ||
      !(trg_sql_mode= (ulonglong*)alloc_root(&table->mem_root,
                                             sizeof(ulonglong))) ||
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      definition_modes_list.push_back(trg_sql_mode, &table->mem_root) ||
      !(trg_definer= (LEX_STRING*) alloc_root(&table->mem_root,
                                              sizeof(LEX_STRING))) ||
      definers_list.push_back(trg_definer, &table->mem_root))
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    goto err_with_cleanup;
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  trg_def->str= thd->query;
  trg_def->length= thd->query_length;
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  *trg_sql_mode= thd->variables.sql_mode;
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#ifndef NO_EMBEDDED_ACCESS_CHECKS
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  if (lex->definer && !is_acl_user(lex->definer->host.str,
                                   lex->definer->user.str))
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  {
    push_warning_printf(thd,
                        MYSQL_ERROR::WARN_LEVEL_NOTE,
                        ER_NO_SUCH_USER,
                        ER(ER_NO_SUCH_USER),
                        lex->definer->user.str,
                        lex->definer->host.str);
  }
#endif /* NO_EMBEDDED_ACCESS_CHECKS */

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  if (lex->definer)
  {
    /* SUID trigger. */

    *definer_user= lex->definer->user;
    *definer_host= lex->definer->host;
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    trg_definer->str= trg_definer_holder;
    trg_definer->length= strxmov(trg_definer->str, definer_user->str, "@",
                                 definer_host->str, NullS) - trg_definer->str;
  }
  else
  {
    /* non-SUID trigger. */

    definer_user->str= 0;
    definer_user->length= 0;

    definer_host->str= 0;
    definer_host->length= 0;

    trg_definer->str= (char*) "";
    trg_definer->length= 0;
  }
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  if (!sql_create_definition_file(&dir, &file, &triggers_file_type,
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                                  (gptr)this, triggers_file_parameters, 0))
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    return 0;

err_with_cleanup:
  my_delete(trigname_path, MYF(MY_WME));
  return 1;
}


/*
  Deletes the .TRG file for a table

  SYNOPSIS
    rm_trigger_file()
      path       - char buffer of size FN_REFLEN to be used
                   for constructing path to .TRG file.
      db         - table's database name
      table_name - table's name

  RETURN VALUE
    False - success
    True  - error
*/

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static bool rm_trigger_file(char *path, const char *db,
                            const char *table_name)
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{
  strxnmov(path, FN_REFLEN, mysql_data_home, "/", db, "/", table_name,
           triggers_file_ext, NullS);
  unpack_filename(path, path);
  return my_delete(path, MYF(MY_WME));
}


/*
  Deletes the .TRN file for a trigger

  SYNOPSIS
    rm_trigname_file()
      path       - char buffer of size FN_REFLEN to be used
                   for constructing path to .TRN file.
      db         - trigger's database name
      table_name - trigger's name

  RETURN VALUE
    False - success
    True  - error
*/

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static bool rm_trigname_file(char *path, const char *db,
                             const char *trigger_name)
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{
  strxnmov(path, FN_REFLEN, mysql_data_home, "/", db, "/", trigger_name,
           trigname_file_ext, NullS);
  unpack_filename(path, path);
  return my_delete(path, MYF(MY_WME));
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}


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/*
  Helper function that saves .TRG file for Table_triggers_list object.

  SYNOPSIS
    save_trigger_file()
      triggers    Table_triggers_list object for which file should be saved
      db          Name of database for subject table
      table_name  Name of subject table

  RETURN VALUE
    FALSE  Success
    TRUE   Error
*/

static bool save_trigger_file(Table_triggers_list *triggers, const char *db,
                              const char *table_name)
{
  char dir_buff[FN_REFLEN], file_buff[FN_REFLEN];
  LEX_STRING dir, file;

  strxnmov(dir_buff, FN_REFLEN, mysql_data_home, "/", db, "/", NullS);
  dir.length= unpack_filename(dir_buff, dir_buff);
  dir.str= dir_buff;
  file.length=  strxnmov(file_buff, FN_REFLEN, table_name, triggers_file_ext,
                         NullS) - file_buff;
  file.str= file_buff;

  return sql_create_definition_file(&dir, &file, &triggers_file_type,
                                    (gptr)triggers, triggers_file_parameters, 0);
}


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/*
  Drop trigger for table.

  SYNOPSIS
    drop_trigger()
      thd    - current thread context (including trigger definition in LEX)
      tables - table list containing one open table for which trigger is
               dropped.

  RETURN VALUE
    False - success
    True  - error
*/
bool Table_triggers_list::drop_trigger(THD *thd, TABLE_LIST *tables)
{
  LEX *lex= thd->lex;
  LEX_STRING *name;
  List_iterator_fast<LEX_STRING> it_name(names_list);
  List_iterator<LEX_STRING>      it_def(definitions_list);
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  List_iterator<ulonglong>       it_mod(definition_modes_list);
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  List_iterator<LEX_STRING>      it_definer(definers_list);
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  char path[FN_REFLEN];
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  while ((name= it_name++))
  {
    it_def++;
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    it_mod++;
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    it_definer++;
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    if (my_strcasecmp(table_alias_charset, lex->spname->m_name.str,
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                      name->str) == 0)
    {
      /*
        Again we don't care much about other things required for
        clean trigger removing since table will be reopened anyway.
      */
      it_def.remove();
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      it_mod.remove();
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      it_definer.remove();
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      if (definitions_list.is_empty())
      {
        /*
          TODO: Probably instead of removing .TRG file we should move
          to archive directory but this should be done as part of
          parse_file.cc functionality (because we will need it
          elsewhere).
        */
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        if (rm_trigger_file(path, tables->db, tables->table_name))
          return 1;
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      }
      else
      {
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        if (save_trigger_file(this, tables->db, tables->table_name))
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          return 1;
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      }
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      if (rm_trigname_file(path, tables->db, lex->spname->m_name.str))
        return 1;
      return 0;
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    }
  }

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  my_message(ER_TRG_DOES_NOT_EXIST, ER(ER_TRG_DOES_NOT_EXIST), MYF(0));
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  return 1;
}


Table_triggers_list::~Table_triggers_list()
{
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  for (int i= 0; i < (int)TRG_EVENT_MAX; i++)
    for (int j= 0; j < (int)TRG_ACTION_MAX; j++)
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      delete bodies[i][j];

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  if (record1_field)
    for (Field **fld_ptr= record1_field; *fld_ptr; fld_ptr++)
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      delete *fld_ptr;
}


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/*
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  Prepare array of Field objects referencing to TABLE::record[1] instead
  of record[0] (they will represent OLD.* row values in ON UPDATE trigger
  and in ON DELETE trigger which will be called during REPLACE execution).
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  SYNOPSIS
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    prepare_record1_accessors()
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      table - pointer to TABLE object for which we are creating fields.

  RETURN VALUE
    False - success
    True  - error
*/
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bool Table_triggers_list::prepare_record1_accessors(TABLE *table)
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{
  Field **fld, **old_fld;

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  if (!(record1_field= (Field **)alloc_root(&table->mem_root,
                                            (table->s->fields + 1) *
                                            sizeof(Field*))))
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    return 1;

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  for (fld= table->field, old_fld= record1_field; *fld; fld++, old_fld++)
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  {
    /*
      QQ: it is supposed that it is ok to use this function for field
      cloning...
    */
    if (!(*old_fld= (*fld)->new_field(&table->mem_root, table)))
      return 1;
    (*old_fld)->move_field((my_ptrdiff_t)(table->record[1] -
                                          table->record[0]));
  }
  *old_fld= 0;

  return 0;
}


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/*
  Adjust Table_triggers_list with new TABLE pointer.

  SYNOPSIS
    set_table()
      new_table - new pointer to TABLE instance
*/

void Table_triggers_list::set_table(TABLE *new_table)
{
  table= new_table;
  for (Field **field= table->triggers->record1_field ; *field ; field++)
  {
    (*field)->table= (*field)->orig_table= new_table;
    (*field)->table_name= &new_table->alias;
  }
}


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/*
  Check whenever .TRG file for table exist and load all triggers it contains.

  SYNOPSIS
    check_n_load()
      thd        - current thread context
      db         - table's database name
      table_name - table's name
      table      - pointer to table object
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      names_only - stop after loading trigger names
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  RETURN VALUE
    False - success
    True  - error
*/
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bool Table_triggers_list::check_n_load(THD *thd, const char *db,
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                                       const char *table_name, TABLE *table,
                                       bool names_only)
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{
  char path_buff[FN_REFLEN];
  LEX_STRING path;
  File_parser *parser;
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  LEX_STRING save_db;
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  DBUG_ENTER("Table_triggers_list::check_n_load");

  strxnmov(path_buff, FN_REFLEN, mysql_data_home, "/", db, "/", table_name,
           triggers_file_ext, NullS);
  path.length= unpack_filename(path_buff, path_buff);
  path.str= path_buff;

  // QQ: should we analyze errno somehow ?
  if (access(path_buff, F_OK))
    DBUG_RETURN(0);

  /*
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    File exists so we got to load triggers.
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    FIXME: A lot of things to do here e.g. how about other funcs and being
    more paranoical ?
  */

  if ((parser= sql_parse_prepare(&path, &table->mem_root, 1)))
  {
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    if (is_equal(&triggers_file_type, parser->type()))
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    {
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      Table_triggers_list *triggers=
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        new (&table->mem_root) Table_triggers_list(table);
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      Handle_old_incorrect_sql_modes_hook sql_modes_hook(path.str);
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      if (!triggers)
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        DBUG_RETURN(1);

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      /*
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        We don't have the following attributes in old versions of .TRG file, so
        we should initialize the list for safety:
          - sql_modes;
          - definers;
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      */
      triggers->definition_modes_list.empty();
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      triggers->definers_list.empty();
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      if (parser->parse((gptr)triggers, &table->mem_root,
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                        triggers_file_parameters,
                        TRG_NUM_REQUIRED_PARAMETERS,
                        &sql_modes_hook))
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        DBUG_RETURN(1);

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      List_iterator_fast<LEX_STRING> it(triggers->definitions_list);
      LEX_STRING *trg_create_str, *trg_name_str;
      ulonglong *trg_sql_mode;

      if (triggers->definition_modes_list.is_empty() &&
          !triggers->definitions_list.is_empty())
      {
        /*
          It is old file format => we should fill list of sql_modes.

          We use one mode (current) for all triggers, because we have not
          information about mode in old format.
        */
        if (!(trg_sql_mode= (ulonglong*)alloc_root(&table->mem_root,
                                                   sizeof(ulonglong))))
        {
          DBUG_RETURN(1); // EOM
        }
        *trg_sql_mode= global_system_variables.sql_mode;
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        while (it++)
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        {
          if (triggers->definition_modes_list.push_back(trg_sql_mode,
                                                        &table->mem_root))
          {
            DBUG_RETURN(1); // EOM
          }
        }
        it.rewind();
      }

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      if (triggers->definers_list.is_empty() &&
          !triggers->definitions_list.is_empty())
      {
        /*
          It is old file format => we should fill list of definers.

          If there is no definer information, we should not switch context to
          definer when checking privileges. I.e. privileges for such triggers
          are checked for "invoker" rather than for "definer".
        */

        LEX_STRING *trg_definer;

        if (! (trg_definer= (LEX_STRING*)alloc_root(&table->mem_root,
                                                    sizeof(LEX_STRING))))
          DBUG_RETURN(1); // EOM

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        trg_definer->str= (char*) "";
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        trg_definer->length= 0;

        while (it++)
        {
          if (triggers->definers_list.push_back(trg_definer,
                                                &table->mem_root))
          {
            DBUG_RETURN(1); // EOM
          }
        }

        it.rewind();
      }

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      DBUG_ASSERT(triggers->definition_modes_list.elements ==
                  triggers->definitions_list.elements);
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      DBUG_ASSERT(triggers->definers_list.elements ==
                  triggers->definitions_list.elements);

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      table->triggers= triggers;
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      /*
        Construct key that will represent triggers for this table in the set
        of routines used by statement.
      */
      triggers->sroutines_key.length= 1+strlen(db)+1+strlen(table_name)+1;
      if (!(triggers->sroutines_key.str=
              alloc_root(&table->mem_root, triggers->sroutines_key.length)))
        DBUG_RETURN(1);
      triggers->sroutines_key.str[0]= TYPE_ENUM_TRIGGER;
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      strxmov(triggers->sroutines_key.str+1, db, ".", table_name, NullS);
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      /*
        TODO: This could be avoided if there is no triggers
              for UPDATE and DELETE.
      */
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      if (!names_only && triggers->prepare_record1_accessors(table))
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        DBUG_RETURN(1);

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      List_iterator_fast<ulonglong> itm(triggers->definition_modes_list);
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      List_iterator_fast<LEX_STRING> it_definer(triggers->definers_list);
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      LEX *old_lex= thd->lex, lex;
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      sp_rcontext *save_spcont= thd->spcont;
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      ulong save_sql_mode= thd->variables.sql_mode;
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      LEX_STRING *on_table_name;
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      thd->lex= &lex;

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      save_db.str= thd->db;
      save_db.length= thd->db_length;
      thd->db_length= strlen(db);
      thd->db= (char *) db;
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      while ((trg_create_str= it++))
      {
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        trg_sql_mode= itm++;
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        LEX_STRING *trg_definer= it_definer++;
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        thd->variables.sql_mode= (ulong)*trg_sql_mode;
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        lex_start(thd, (uchar*)trg_create_str->str, trg_create_str->length);
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	thd->spcont= 0;
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        if (MYSQLparse((void *)thd) || thd->is_fatal_error)
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        {
          /*
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            Free lex associated resources.
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            QQ: Do we really need all this stuff here ?
          */
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          delete lex.sphead;
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          goto err_with_lex_cleanup;
        }

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        lex.sphead->set_info(0, 0, &lex.sp_chistics, *trg_sql_mode);

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        triggers->bodies[lex.trg_chistics.event]
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                             [lex.trg_chistics.action_time]= lex.sphead;
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        if (!trg_definer->length)
        {
          /*
            This trigger was created/imported from the previous version of
            MySQL, which does not support triggers definers. We should emit
            warning here.
          */

          push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                              ER_TRG_NO_DEFINER, ER(ER_TRG_NO_DEFINER),
                              (const char*) db,
                              (const char*) lex.sphead->m_name.str);

          /*
            Set definer to the '' to correct displaying in the information
            schema.
          */

          lex.sphead->set_definer("", 0);

          /*
            Triggers without definer information are executed under the
            authorization of the invoker.
          */

          lex.sphead->m_chistics->suid= SP_IS_NOT_SUID;
        }
        else
          lex.sphead->set_definer(trg_definer->str, trg_definer->length);

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        if (triggers->names_list.push_back(&lex.sphead->m_name,
                                           &table->mem_root))
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            goto err_with_lex_cleanup;
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        if (!(on_table_name= (LEX_STRING*) alloc_root(&table->mem_root,
                                                      sizeof(LEX_STRING))))
          goto err_with_lex_cleanup;
        *on_table_name= lex.ident;
        if (triggers->on_table_names_list.push_back(on_table_name, &table->mem_root))
          goto err_with_lex_cleanup;

        /*
          Let us check that we correctly update trigger definitions when we
          rename tables with triggers.
        */
        DBUG_ASSERT(!my_strcasecmp(table_alias_charset, lex.query_tables->db, db) &&
                    !my_strcasecmp(table_alias_charset, lex.query_tables->table_name,
                                   table_name));

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        if (names_only)
        {
          lex_end(&lex);
          continue;
        }
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        /*
          Let us bind Item_trigger_field objects representing access to fields
          in old/new versions of row in trigger to Field objects in table being
          opened.

1011 1012 1013
          We ignore errors here, because if even something is wrong we still
          will be willing to open table to perform some operations (e.g.
          SELECT)...
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          Anyway some things can be checked only during trigger execution.
        */
        for (Item_trigger_field *trg_field=
               (Item_trigger_field *)(lex.trg_table_fields.first);
             trg_field;
             trg_field= trg_field->next_trg_field)
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        {
          trg_field->setup_field(thd, table, 
            &triggers->subject_table_grants[lex.trg_chistics.event]
                                           [lex.trg_chistics.action_time]);
        }
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        lex_end(&lex);
      }
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      thd->db= save_db.str;
      thd->db_length= save_db.length;
1030
      thd->lex= old_lex;
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1031
      thd->spcont= save_spcont;
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      thd->variables.sql_mode= save_sql_mode;
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      DBUG_RETURN(0);

err_with_lex_cleanup:
      // QQ: anything else ?
      lex_end(&lex);
      thd->lex= old_lex;
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      thd->spcont= save_spcont;
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      thd->variables.sql_mode= save_sql_mode;
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      thd->db= save_db.str;
      thd->db_length= save_db.length;
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      DBUG_RETURN(1);
    }

    /*
      We don't care about this error message much because .TRG files will
      be merged into .FRM anyway.
    */
1051
    my_error(ER_WRONG_OBJECT, MYF(0),
1052
             table_name, triggers_file_ext+1, "TRIGGER");
1053 1054 1055 1056 1057
    DBUG_RETURN(1);
  }

  DBUG_RETURN(1);
}
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/*
  Obtains and returns trigger metadata

  SYNOPSIS
    get_trigger_info()
      thd       - current thread context
      event     - trigger event type
      time_type - trigger action time
      name      - returns name of trigger
      stmt      - returns statement of trigger
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      sql_mode  - returns sql_mode of trigger
1071 1072 1073
      definer_user - returns definer/creator of trigger. The caller is
                  responsible to allocate enough space for storing definer
                  information.
1074 1075 1076 1077 1078 1079 1080 1081 1082

  RETURN VALUE
    False - success
    True  - error
*/

bool Table_triggers_list::get_trigger_info(THD *thd, trg_event_type event,
                                           trg_action_time_type time_type,
                                           LEX_STRING *trigger_name,
1083
                                           LEX_STRING *trigger_stmt,
1084 1085
                                           ulong *sql_mode,
                                           LEX_STRING *definer)
1086 1087 1088 1089 1090 1091 1092
{
  sp_head *body;
  DBUG_ENTER("get_trigger_info");
  if ((body= bodies[event][time_type]))
  {
    *trigger_name= body->m_name;
    *trigger_stmt= body->m_body;
1093
    *sql_mode= body->m_sql_mode;
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105

    if (body->m_chistics->suid == SP_IS_NOT_SUID)
    {
      definer->str[0]= 0;
      definer->length= 0;
    }
    else
    {
      definer->length= strxmov(definer->str, body->m_definer_user.str, "@",
                               body->m_definer_host.str, NullS) - definer->str;
    }

1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134
    DBUG_RETURN(0);
  }
  DBUG_RETURN(1);
}


/*
  Find trigger's table from trigger identifier and add it to
  the statement table list.

  SYNOPSIS
    mysql_table_for_trigger()
      thd    - current thread context
      trig   - identifier for trigger

  RETURN VALUE
    0 - error
    # - pointer to TABLE_LIST object for the table
*/

static TABLE_LIST *add_table_for_trigger(THD *thd, sp_name *trig)
{
  LEX *lex= thd->lex;
  char path_buff[FN_REFLEN];
  LEX_STRING path;
  File_parser *parser;
  struct st_trigname trigname;
  DBUG_ENTER("add_table_for_trigger");

1135
  strxnmov(path_buff, FN_REFLEN, mysql_data_home, "/", trig->m_db.str, "/",
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           trig->m_name.str, trigname_file_ext, NullS);
  path.length= unpack_filename(path_buff, path_buff);
  path.str= path_buff;

  if (access(path_buff, F_OK))
  {
    my_error(ER_TRG_DOES_NOT_EXIST, MYF(0));
    DBUG_RETURN(0);
  }

  if (!(parser= sql_parse_prepare(&path, thd->mem_root, 1)))
    DBUG_RETURN(0);

1149
  if (!is_equal(&trigname_file_type, parser->type()))
1150
  {
1151
    my_error(ER_WRONG_OBJECT, MYF(0), trig->m_name.str, trigname_file_ext+1,
1152 1153 1154 1155 1156
             "TRIGGERNAME");
    DBUG_RETURN(0);
  }

  if (parser->parse((gptr)&trigname, thd->mem_root,
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                    trigname_file_parameters, 1,
                    &file_parser_dummy_hook))
1159 1160 1161 1162 1163
    DBUG_RETURN(0);

  /* We need to reset statement table list to be PS/SP friendly. */
  lex->query_tables= 0;
  lex->query_tables_last= &lex->query_tables;
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  DBUG_RETURN(sp_add_to_query_tables(thd, lex, trig->m_db.str,
1165
                                     trigname.trigger_table.str, TL_IGNORE));
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}


/*
  Drop all triggers for table.

  SYNOPSIS
    drop_all_triggers()
      thd    - current thread context
      db     - schema for table
      name   - name for table

  NOTE
    The calling thread should hold the LOCK_open mutex;

  RETURN VALUE
    False - success
    True  - error
*/

bool Table_triggers_list::drop_all_triggers(THD *thd, char *db, char *name)
{
  TABLE table;
  char path[FN_REFLEN];
  bool result= 0;
  DBUG_ENTER("drop_all_triggers");

  bzero(&table, sizeof(table));
  init_alloc_root(&table.mem_root, 8192, 0);

  safe_mutex_assert_owner(&LOCK_open);

  if (Table_triggers_list::check_n_load(thd, db, name, &table, 1))
  {
    result= 1;
    goto end;
  }
  if (table.triggers)
  {
    LEX_STRING *trigger;
    List_iterator_fast<LEX_STRING> it_name(table.triggers->names_list);

    while ((trigger= it_name++))
    {
      if (rm_trigname_file(path, db, trigger->str))
      {
        /*
          Instead of immediately bailing out with error if we were unable
          to remove .TRN file we will try to drop other files.
        */
        result= 1;
        continue;
      }
    }

    if (rm_trigger_file(path, db, name))
    {
      result= 1;
      goto end;
    }
  }
end:
  if (table.triggers)
    delete table.triggers;
  free_root(&table.mem_root, MYF(0));
  DBUG_RETURN(result);
}
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1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280
/*
  Update .TRG file after renaming triggers' subject table
  (change name of table in triggers' definitions).

  SYNOPSIS
    change_table_name_in_triggers()
      thd                 Thread context
      db_name             Database of subject table
      old_table_name      Old subject table's name
      new_table_name      New subject table's name

  RETURN VALUE
    FALSE  Success
    TRUE   Failure
*/

bool
Table_triggers_list::change_table_name_in_triggers(THD *thd,
                                                   const char *db_name,
                                                   LEX_STRING *old_table_name,
                                                   LEX_STRING *new_table_name)
{
  char path_buff[FN_REFLEN];
  LEX_STRING *def, *on_table_name, new_def;
  ulonglong *sql_mode;
  ulong save_sql_mode= thd->variables.sql_mode;
  List_iterator_fast<LEX_STRING> it_def(definitions_list);
  List_iterator_fast<LEX_STRING> it_on_table_name(on_table_names_list);
  List_iterator_fast<ulonglong> it_mode(definition_modes_list);
  uint on_q_table_name_len, before_on_len;
  String buff;

  DBUG_ASSERT(definitions_list.elements == on_table_names_list.elements &&
              definitions_list.elements == definition_modes_list.elements);

  while ((def= it_def++))
  {
    on_table_name= it_on_table_name++;
    thd->variables.sql_mode= *(it_mode++);

    /* Construct CREATE TRIGGER statement with new table name. */
    buff.length(0);
    before_on_len= on_table_name->str - def->str;
    buff.append(def->str, before_on_len);
    buff.append(STRING_WITH_LEN("ON "));
    append_identifier(thd, &buff, new_table_name->str, new_table_name->length);
1281
    buff.append(STRING_WITH_LEN(" "));
1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375
    on_q_table_name_len= buff.length() - before_on_len;
    buff.append(on_table_name->str + on_table_name->length,
                def->length - (before_on_len + on_table_name->length));
    /*
      It is OK to allocate some memory on table's MEM_ROOT since this
      table instance will be thrown out at the end of rename anyway.
    */
    new_def.str= memdup_root(&table->mem_root, buff.ptr(), buff.length());
    new_def.length= buff.length();
    on_table_name->str= new_def.str + before_on_len;
    on_table_name->length= on_q_table_name_len;
    *def= new_def;
  }

  thd->variables.sql_mode= save_sql_mode;

  if (thd->is_fatal_error)
    return TRUE; /* OOM */

  if (save_trigger_file(this, db_name, new_table_name->str))
    return TRUE;
  if (rm_trigger_file(path_buff, db_name, old_table_name->str))
  {
    (void) rm_trigger_file(path_buff, db_name, new_table_name->str);
    return TRUE;
  }
  return FALSE;
}


/*
  Iterate though Table_triggers_list::names_list list and update .TRN files
  after renaming triggers' subject table.

  SYNOPSIS
    change_table_name_in_trignames()
      db_name             Database of subject table
      new_table_name      New subject table's name
      stopper             Pointer to Table_triggers_list::names_list at
                          which we should stop updating.

  RETURN VALUE
    0      Success
    non-0  Failure, pointer to Table_triggers_list::names_list element
           for which update failed.
*/

LEX_STRING*
Table_triggers_list::change_table_name_in_trignames(const char *db_name,
                                                    LEX_STRING *new_table_name,
                                                    LEX_STRING *stopper)
{
  char dir_buff[FN_REFLEN], trigname_buff[FN_REFLEN];
  struct st_trigname trigname;
  LEX_STRING dir, trigname_file;
  LEX_STRING *trigger;
  List_iterator_fast<LEX_STRING> it_name(names_list);

  strxnmov(dir_buff, FN_REFLEN, mysql_data_home, "/", db_name, "/", NullS);
  dir.length= unpack_filename(dir_buff, dir_buff);
  dir.str= dir_buff;

  while ((trigger= it_name++) != stopper)
  {
    trigname_file.length= strxnmov(trigname_buff, FN_REFLEN, trigger->str,
                                   trigname_file_ext, NullS) - trigname_buff;
    trigname_file.str= trigname_buff;

    trigname.trigger_table= *new_table_name;

    if (sql_create_definition_file(&dir, &trigname_file, &trigname_file_type,
        (gptr)&trigname, trigname_file_parameters, 0))
      return trigger;
  }

  return 0;
}


/*
  Update .TRG and .TRN files after renaming triggers' subject table.

  SYNOPSIS
    change_table_name()
      thd        Thread context
      db         Old database of subject table
      old_table  Old name of subject table
      new_db     New database for subject table
      new_table  New name of subject table

  NOTE
    This method tries to leave trigger related files in consistent state,
    i.e. it either will complete successfully, or will fail leaving files
    in their initial state.
1376
    Also this method assumes that subject table is not renamed to itself.
1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397

  RETURN VALUE
    FALSE  Success
    TRUE   Error
*/

bool Table_triggers_list::change_table_name(THD *thd, const char *db,
                                            const char *old_table,
                                            const char *new_db,
                                            const char *new_table)
{
  TABLE table;
  bool result= 0;
  LEX_STRING *err_trigname;
  DBUG_ENTER("change_table_name");

  bzero(&table, sizeof(table));
  init_alloc_root(&table.mem_root, 8192, 0);

  safe_mutex_assert_owner(&LOCK_open);

1398 1399 1400
  DBUG_ASSERT(my_strcasecmp(table_alias_charset, db, new_db) ||
              my_strcasecmp(table_alias_charset, old_table, new_table));

1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453
  if (Table_triggers_list::check_n_load(thd, db, old_table, &table, TRUE))
  {
    result= 1;
    goto end;
  }
  if (table.triggers)
  {
    LEX_STRING_WITH_INIT old_table_name(old_table, strlen(old_table));
    LEX_STRING_WITH_INIT new_table_name(new_table, strlen(new_table));
    /*
      Since triggers should be in the same schema as their subject tables
      moving table with them between two schemas raises too many questions.
      (E.g. what should happen if in new schema we already have trigger
       with same name ?).
    */
    if (my_strcasecmp(table_alias_charset, db, new_db))
    {
      my_error(ER_TRG_IN_WRONG_SCHEMA, MYF(0));
      result= 1;
      goto end;
    }
    if (table.triggers->change_table_name_in_triggers(thd, db,
                                                      &old_table_name,
                                                      &new_table_name))
    {
      result= 1;
      goto end;
    }
    if ((err_trigname= table.triggers->change_table_name_in_trignames(
                                         db, &new_table_name, 0)))
    {
      /*
        If we were unable to update one of .TRN files properly we will
        revert all changes that we have done and report about error.
        We assume that we will be able to undo our changes without errors
        (we can't do much if there will be an error anyway).
      */
      (void) table.triggers->change_table_name_in_trignames(db,
                                                            &old_table_name,
                                                            err_trigname);
      (void) table.triggers->change_table_name_in_triggers(thd, db,
                                                           &new_table_name,
                                                           &old_table_name);
      result= 1;
      goto end;
    }
  }
end:
  delete table.triggers;
  free_root(&table.mem_root, MYF(0));
  DBUG_RETURN(result);
}

1454 1455 1456 1457 1458

bool Table_triggers_list::process_triggers(THD *thd, trg_event_type event,
                                           trg_action_time_type time_type,
                                           bool old_row_is_record1)
{
1459
  bool err_status= FALSE;
1460
  sp_head *sp_trigger= bodies[event][time_type];
1461

1462
  if (sp_trigger)
1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476
  {
    Sub_statement_state statement_state;

    if (old_row_is_record1)
    {
      old_field= record1_field;
      new_field= table->field;
    }
    else
    {
      new_field= record1_field;
      old_field= table->field;
    }

1477 1478 1479 1480 1481 1482
#ifndef NO_EMBEDDED_ACCESS_CHECKS
    Security_context *save_ctx;

    if (sp_change_security_context(thd, sp_trigger, &save_ctx))
      return TRUE;

1483
    /*
1484
      NOTE: TRIGGER_ACL should be used below.
1485 1486
    */

1487 1488 1489 1490 1491 1492 1493
    if (check_global_access(thd, SUPER_ACL))
    {
      sp_restore_security_context(thd, save_ctx);
      return TRUE;
    }

    /*
1494 1495 1496
      Fetch information about table-level privileges to GRANT_INFO structure for
      subject table. Check of privileges that will use it and information about
      column-level privileges will happen in Item_trigger_field::fix_fields().
1497
    */
1498 1499 1500 1501

    fill_effective_table_privileges(thd,
                                    &subject_table_grants[event][time_type],
                                    table->s->db, table->s->table_name);
1502 1503
#endif // NO_EMBEDDED_ACCESS_CHECKS

1504
    thd->reset_sub_statement_state(&statement_state, SUB_STMT_TRIGGER);
1505
    err_status= sp_trigger->execute_function(thd, 0, 0, 0);
1506
    thd->restore_sub_statement_state(&statement_state);
1507 1508 1509 1510

#ifndef NO_EMBEDDED_ACCESS_CHECKS
    sp_restore_security_context(thd, save_ctx);
#endif // NO_EMBEDDED_ACCESS_CHECKS
1511 1512
  }

1513
  return err_status;
1514
}
1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536


/*
  Trigger BUG#14090 compatibility hook

  SYNOPSIS
    Handle_old_incorrect_sql_modes_hook::process_unknown_string()
    unknown_key          [in/out] reference on the line with unknown
                                  parameter and the parsing point
    base                 [in] base address for parameter writing (structure
                              like TABLE)
    mem_root             [in] MEM_ROOT for parameters allocation
    end                  [in] the end of the configuration

  NOTE: this hook process back compatibility for incorrectly written
  sql_modes parameter (see BUG#14090).

  RETURN
    FALSE OK
    TRUE  Error
*/

1537 1538
#define INVALID_SQL_MODES_LENGTH 13

1539 1540 1541 1542 1543 1544 1545 1546
bool
Handle_old_incorrect_sql_modes_hook::process_unknown_string(char *&unknown_key,
                                                            gptr base,
                                                            MEM_ROOT *mem_root,
                                                            char *end)
{
  DBUG_ENTER("handle_old_incorrect_sql_modes");
  DBUG_PRINT("info", ("unknown key:%60s", unknown_key));
1547

1548 1549 1550 1551
  if (unknown_key + INVALID_SQL_MODES_LENGTH + 1 < end &&
      unknown_key[INVALID_SQL_MODES_LENGTH] == '=' &&
      !memcmp(unknown_key, STRING_WITH_LEN("sql_modes")))
  {
1552 1553
    char *ptr= unknown_key + INVALID_SQL_MODES_LENGTH + 1;

1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573
    DBUG_PRINT("info", ("sql_modes affected by BUG#14090 detected"));
    push_warning_printf(current_thd,
                        MYSQL_ERROR::WARN_LEVEL_NOTE,
                        ER_OLD_FILE_FORMAT,
                        ER(ER_OLD_FILE_FORMAT),
                        (char *)path, "TRIGGER");
    if (get_file_options_ulllist(ptr, end, unknown_key, base,
                                 &sql_modes_parameters, mem_root))
    {
      DBUG_RETURN(TRUE);
    }
    /*
      Set parsing pointer to the last symbol of string (\n)
      1) to avoid problem with \0 in the junk after sql_modes
      2) to speed up skipping this line by parser.
    */
    unknown_key= ptr-1;
  }
  DBUG_RETURN(FALSE);
}