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fixed union with prepared statement bug found by Konstantin

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This commit is contained in:
bell@sanja.is.com.ua
2004-03-23 14:26:54 +02:00
parent 6158c94b32
commit ce7798c45e
3 changed files with 81 additions and 13 deletions
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33
sql/sql_union.cc
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@ -226,13 +226,23 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
thd_arg->lex->current_select= lex_select_save;
{
Statement *stmt= thd->current_statement;
Statement backup;
if (stmt)
thd->set_n_backup_item_arena(stmt, &backup);
Field **field;
for (field= table->field; *field; field++)
{
Item_field *item= new Item_field(*field);
if (!item || item_list.push_back(item))
{
if (stmt)
thd->restore_backup_item_arena(stmt, &backup);
DBUG_RETURN(-1);
}
}
if (stmt)
thd->restore_backup_item_arena(stmt, &backup);
}
}
else
@ -427,7 +437,7 @@ int st_select_lex_unit::cleanup()
{
DBUG_RETURN(0);
}
cleaned= 0;
cleaned= 1;
if (union_result)
{
@ -461,16 +471,19 @@ void st_select_lex_unit::reinit_exec_mechanism()
{
prepared= optimized= executed= 0;
#ifndef DBUG_OFF
List_iterator_fast<Item> it(item_list);
Item_field *field;
while ((field= (Item_field *)it++))
if (first_select()->next_select())
{
/*
we can't cleanup here, because it broke link to temporary table field,
but have to drop fixed flag to allow next fix_field of this field
during re-executing
*/
field->fixed= 0;
List_iterator_fast<Item> it(item_list);
Item *field;
while ((field= it++))
{
/*
we can't cleanup here, because it broke link to temporary table field,
but have to drop fixed flag to allow next fix_field of this field
during re-executing
*/
field->fixed= 0;
}
}
#endif
}