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Merge gleb.loc:/home/uchum/work/bk/mysql-5.0-opt

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into  gleb.loc:/home/uchum/work/bk/mysql-5.1-opt
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gshchepa/uchum@gleb.loc
2007-05-28 00:22:44 +05:00
parent c65b50378a bed482c2f9
commit fae737b426
14 changed files with 333 additions and 8 deletions
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33
sql/sql_select.cc
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@ -6099,13 +6099,39 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
}
/*
Push down all predicates from on expressions.
Each of these predicated are guarded by a variable
Push down conditions from all on expressions.
Each of these conditions are guarded by a variable
that turns if off just before null complemented row for
outer joins is formed. Thus, the predicates from an
outer joins is formed. Thus, the condition from an
'on expression' are guaranteed not to be checked for
the null complemented row.
*/
/* First push down constant conditions from on expressions */
for (JOIN_TAB *join_tab= join->join_tab+join->const_tables;
join_tab < join->join_tab+join->tables ; join_tab++)
{
if (*join_tab->on_expr_ref)
{
JOIN_TAB *cond_tab= join_tab->first_inner;
COND *tmp= make_cond_for_table(*join_tab->on_expr_ref,
join->const_table_map,
(table_map) 0);
if (!tmp)
continue;
tmp= new Item_func_trig_cond(tmp, &cond_tab->not_null_compl);
if (!tmp)
DBUG_RETURN(1);
tmp->quick_fix_field();
cond_tab->select_cond= !cond_tab->select_cond ? tmp :
new Item_cond_and(cond_tab->select_cond,tmp);
if (!cond_tab->select_cond)
DBUG_RETURN(1);
cond_tab->select_cond->quick_fix_field();
}
}
/* Push down non-constant conditions from on expressions */
JOIN_TAB *last_tab= tab;
while (first_inner_tab && first_inner_tab->last_inner == last_tab)
{
@ -6558,7 +6584,6 @@ void JOIN::cleanup(bool full)
for (tab= join_tab, end= tab+tables; tab != end; tab++)
tab->cleanup();
table= 0;
tables= 0;
}
else
{