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ulternative bugfix for BUG#2508 and fix for BUG#2809 - every table has its own TABLE structure

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bell@sanja.is.com.ua
2004-02-17 01:14:51 +02:00
parent 80b0188663
commit 3f86f10a57
15 changed files with 68 additions and 79 deletions
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25
sql/sql_union.cc
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@ -206,7 +206,6 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
if (first_select->next_select())
{
union_result->tmp_table_param.field_count= types.elements;
union_result->tmp_table_param.all_nulls= true;
if (!(table= create_tmp_table(thd_arg,
&union_result->tmp_table_param, types,
(ORDER*) 0, !union_option, 1,
@ -310,30 +309,6 @@ int st_select_lex_unit::exec()
sl->options|= found_rows_for_union;
}
sl->join->select_options=sl->options;
/*
As far as union share table space we should reassign table map,
which can be spoiled by 'prepare' of JOIN of other UNION parts
if it use same tables
*/
uint tablenr=0;
ulong query_id= thd->query_id;
for (TABLE_LIST *table_list= (TABLE_LIST*) sl->table_list.first;
table_list;
table_list= table_list->next, tablenr++)
{
if (table_list->shared)
{
/*
review notes: Check it carefully. I still can't understand
why I should not touch table->used_keys. For my point of
view we should do here same procedura as it was done by
setup_table
*/
setup_table_map(table_list->table, table_list, tablenr);
}
for (unsigned int i=0; i < table_list->table->fields; i++)
table_list->table->field[i]->query_id= query_id;
}
res= sl->join->optimize();
}
if (!res)