Commit fe3dee06 authored by unknown's avatar unknown
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Fix for bug #20695: Charset introducer overrides charset definition for column. 

  - if there are two character set definitions in the column declaration,
    we replace the first one with the second one as we store both in the LEX->charset
    slot. Add a separate slot to the LEX structure to store underscore charset.
  - convert default values to the column charset of STRING, VARSTRING fields 
    if necessary as well.


mysql-test/r/ctype_recoding.result:
  Fix for bug #20695: Charset introducer overrides charset definition for column.
    - test result.
mysql-test/t/ctype_recoding.test:
  Fix for bug #20695: Charset introducer overrides charset definition for column.
    - test case.
sql/sql_lex.cc:
  Fix for bug #20695: Charset introducer overrides charset definition for column.
    - LEX->underscore_charset introduced to store UNDERSCORE_CHARSET
sql/sql_lex.h:
  Fix for bug #20695: Charset introducer overrides charset definition for column.
    - LEX->underscore_charset introduced to store UNDERSCORE_CHARSET
sql/sql_table.cc:
  Fix for bug #20695: Charset introducer overrides charset definition for column.
    - convert default values to the column charset of VARSTRING, STRING, ENUM, 
      SET fields if necessary.
sql/sql_yacc.yy:
  Fix for bug #20695: Charset introducer overrides charset definition for column.
    - LEX->underscore_charset introduced to store UNDERSCORE_CHARSET
parent ef601901

mysql-test/r/ctype_recoding.result

+11 −0
Original line number Diff line number Diff line
@@ -247,3 +247,14 @@ lpad(c1,3,' 
select rpad(c1,3,''), rpad('',3,c1) from t1;

rpad(c1,3,'')	rpad('',3,c1)

	

drop table t1;

set names koi8r;

create table t1(a char character set cp1251 default _koi8r 0xFF);

show create table t1;

Table	Create Table

t1	CREATE TABLE `t1` (

  `a` char(1) character set cp1251 default ''

) ENGINE=MyISAM DEFAULT CHARSET=latin1

drop table t1;

create table t1(a char character set latin1 default _cp1251 0xFF);

ERROR 42000: Invalid default value for 'a'

mysql-test/t/ctype_recoding.test

+12 −0
Original line number Diff line number Diff line
@@ -186,5 +186,17 @@ select rpad(c1,3,' 
# TODO

#select case c1 when '' then '' when '' then '' else 'c' end from t1;

#select export_set(5,c1,''), export_set(5,'',c1) from t1;

drop table t1;



#

# Bug 20695: problem with field default value's character set

#



set names koi8r;

create table t1(a char character set cp1251 default _koi8r 0xFF);

show create table t1;

drop table t1;

--error 1067

create table t1(a char character set latin1 default _cp1251 0xFF);



# End of 4.1 tests

sql/sql_lex.cc

+3 −2
Original line number Diff line number Diff line
@@ -643,7 +643,8 @@ int yylex(void *arg, void *yythd) 
      */



      if ((yylval->lex_str.str[0]=='_') && 

          (lex->charset=get_charset_by_csname(yylval->lex_str.str+1,

          (lex->underscore_charset=

             get_charset_by_csname(yylval->lex_str.str + 1,

                                   MY_CS_PRIMARY,MYF(0))))

        return(UNDERSCORE_CHARSET);

      return(result_state);			// IDENT or IDENT_QUOTED

sql/sql_lex.h

+1 −1
Original line number Diff line number Diff line
@@ -613,7 +613,7 @@ typedef struct st_lex 
  LEX_USER *grant_user;

  gptr yacc_yyss,yacc_yyvs;

  THD *thd;

  CHARSET_INFO *charset;

  CHARSET_INFO *charset, *underscore_charset;



  List<key_part_spec> col_list;

  List<key_part_spec> ref_list;

sql/sql_table.cc

+34 −29
Original line number Diff line number Diff line
@@ -516,6 +516,40 @@ int mysql_prepare_table(THD *thd, HA_CREATE_INFO *create_info, 
      DBUG_RETURN(-1);

    }



    /*

      Convert the default value character

      set into the column character set if necessary.

    */

    if (sql_field->def && 

        savecs != sql_field->def->collation.collation &&

        (sql_field->sql_type == FIELD_TYPE_VAR_STRING ||

         sql_field->sql_type == FIELD_TYPE_STRING ||

         sql_field->sql_type == FIELD_TYPE_SET ||

         sql_field->sql_type == FIELD_TYPE_ENUM))

    {

      Item_arena backup_arena;

      bool need_to_change_arena=

        !thd->current_arena->is_conventional_execution();

      if (need_to_change_arena)

      {

        /* Assert that we don't do that at every PS execute */

        DBUG_ASSERT(thd->current_arena->is_first_stmt_execute());

        thd->set_n_backup_item_arena(thd->current_arena, &backup_arena);

      }



      sql_field->def= sql_field->def->safe_charset_converter(savecs);



      if (need_to_change_arena)

        thd->restore_backup_item_arena(thd->current_arena, &backup_arena);



      if (sql_field->def == NULL)

      {

        /* Could not convert */

        my_error(ER_INVALID_DEFAULT, MYF(0), sql_field->field_name);

        DBUG_RETURN(-1);

      }

    }



    if (sql_field->sql_type == FIELD_TYPE_SET ||

        sql_field->sql_type == FIELD_TYPE_ENUM)

    {
@@ -580,35 +614,6 @@ int mysql_prepare_table(THD *thd, HA_CREATE_INFO *create_info, 
        sql_field->interval_list.empty(); // Don't need interval_list anymore

      }



      /*

        Convert the default value from client character

        set into the column character set if necessary.

      */

      if (sql_field->def && cs != sql_field->def->collation.collation)

      {

        Item_arena backup_arena;

        bool need_to_change_arena=

          !thd->current_arena->is_conventional_execution();

        if (need_to_change_arena)

        {

          /* Asser that we don't do that at every PS execute */

          DBUG_ASSERT(thd->current_arena->is_first_stmt_execute());

          thd->set_n_backup_item_arena(thd->current_arena, &backup_arena);

        }



        sql_field->def= sql_field->def->safe_charset_converter(cs);



        if (need_to_change_arena)

          thd->restore_backup_item_arena(thd->current_arena, &backup_arena);



        if (sql_field->def == NULL)

        {

          /* Could not convert */

          my_error(ER_INVALID_DEFAULT, MYF(0), sql_field->field_name);

          DBUG_RETURN(-1);

        }

      }



      if (sql_field->sql_type == FIELD_TYPE_SET)

      {

        if (sql_field->def != NULL)