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MWL#17: Table elimination

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- When collecting Item_subselect::refers_to, put references to the correct
  subselect entry.
This commit is contained in:
Sergey Petrunya 2009-07-08 21:10:38 +04:00
parent 7b3d464578
commit 5ecad03df9
1 changed files with 5 additions and 1 deletions
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6
sql/sql_lex.cc
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@ -1780,6 +1780,7 @@ void st_select_lex_unit::exclude_tree()
void st_select_lex::mark_as_dependent(st_select_lex *last, Item *dependency)
{
SELECT_LEX *next_to_last;
/*
Mark all selects from resolved to 1 before select where was
found table as depended (of select where was found table)
@ -1787,6 +1788,7 @@ void st_select_lex::mark_as_dependent(st_select_lex *last, Item *dependency)
for (SELECT_LEX *s= this;
s && s != last;
s= s->outer_select())
{
if (!(s->uncacheable & UNCACHEABLE_DEPENDENT))
{
// Select is dependent of outer select
@ -1802,10 +1804,12 @@ void st_select_lex::mark_as_dependent(st_select_lex *last, Item *dependency)
sl->uncacheable|= UNCACHEABLE_UNITED;
}
}
next_to_last= s;
}
is_correlated= TRUE;
this->master_unit()->item->is_correlated= TRUE;
if (dependency)
this->master_unit()->item->refers_to.push_back(dependency);
next_to_last->master_unit()->item->refers_to.push_back(dependency);
}
bool st_select_lex_node::set_braces(bool value) { return 1; }