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Merge

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This commit is contained in:
Igor Babaev
2010-10-14 15:46:20 -07:00
parent 00a2f36bbf f0c6576b85
commit 3c9dcf9da7
15 changed files with 258 additions and 171 deletions
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23
sql/sql_select.cc
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@ -1129,29 +1129,6 @@ JOIN::optimize()
conds=new Item_int((longlong) 0,1); // Always false
}
/*
It's necessary to check const part of HAVING cond as there is a
chance that some cond parts may become const items after
make_join_statistics() (for example when Item is a reference to
cost table field from outer join).
This check is performed only for those conditions which do not use
aggregate functions. In such case temporary table may not be used
and const condition elements may be lost during further having
condition transformation in JOIN::exec.
*/
if (having && const_table_map && !having->with_sum_func)
{
having->update_used_tables();
having= remove_eq_conds(thd, having, &having_value);
if (having_value == Item::COND_FALSE)
{
having= new Item_int((longlong) 0,1);
zero_result_cause= "Impossible HAVING noticed after reading const tables";
DBUG_RETURN(0);
}
}
if (make_join_select(this, select, conds))
{
zero_result_cause=