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Fix for bug#15307 GROUP_CONCAT() with ORDER BY returns empty set on information_schema(2nd ver)

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Fill schema tables with data before filesort if it's necessary
This commit is contained in:
gluh@eagle.intranet.mysql.r18.ru
2006-01-24 16:48:19 +04:00
parent f2fa83fae0
commit b4f7c9bbd5
6 changed files with 37 additions and 1 deletions
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12
sql/sql_show.cc
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@ -3845,7 +3845,16 @@ bool get_schema_tables_result(JOIN *join)
TABLE_LIST *table_list= tab->table->pos_in_table_list;
if (table_list->schema_table && thd->fill_derived_tables())
{
if (&lex->unit != lex->current_select->master_unit()) // is subselect
bool is_subselect= (&lex->unit != lex->current_select->master_unit());
/*
The schema table is already processed and
the statement is not a subselect.
So we don't need to handle this table again.
*/
if (table_list->is_schema_table_processed && !is_subselect)
continue;
if (is_subselect) // is subselect
{
table_list->table->file->extra(HA_EXTRA_RESET_STATE);
table_list->table->file->delete_all_rows();
@ -3858,6 +3867,7 @@ bool get_schema_tables_result(JOIN *join)
if (table_list->schema_table->fill_table(thd, table_list,
tab->select_cond))
result= 1;
table_list->is_schema_table_processed= TRUE;
}
}
thd->no_warnings_for_error= 0;