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Merge olga.mysql.com:/home/igor/dev-opt/mysql-4.1-opt-bug28272

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into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug28272
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igor@olga.mysql.com
2007-05-15 13:16:10 -07:00
parent 22dfb9f0f7 268be06874
commit fea67e6868
3 changed files with 52 additions and 0 deletions
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6
sql/sql_select.cc
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@ -976,6 +976,12 @@ JOIN::optimize()
}
}
if (conds &&!outer_join && const_table_map != found_const_table_map &&
(select_options & SELECT_DESCRIBE) &&
select_lex->master_unit() == &thd->lex->unit) // upper level SELECT
{
conds=new Item_int((longlong) 0,1); // Always false
}
if (make_join_select(this, select, conds))
{
zero_result_cause=