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Applied Sanja's patch to fix LP bug #784297 in the tree for mwl106.

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The patch imposes unconditional materialization for derived tables
used in update and multi-update statements.
Fixed a bug with a wrong order of processing derived tables/views
at the prepare stage that caused a crash for the variant of the 
query from test case for bug 52157.
This commit is contained in:
Igor Babaev
2011-05-27 00:03:55 -07:00
parent 317e04ce67
commit c9a349488b
10 changed files with 55 additions and 17 deletions
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24
sql/sql_union.cc
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@@ -944,3 +944,27 @@ void st_select_lex::cleanup_all_joins(bool full)
for (sl= unit->first_select(); sl; sl= sl->next_select())
sl->cleanup_all_joins(full);
}
/**
Set exclude_from_table_unique_test for selects of this unit and all
underlying selects.
@note used to exclude materialized derived tables (views) from unique
table check.
*/
void st_select_lex_unit::set_unique_exlude()
{
for (SELECT_LEX *sl= first_select(); sl; sl= sl->next_select())
{
sl->exclude_from_table_unique_test= TRUE;
for (SELECT_LEX_UNIT *unit= sl->first_inner_unit();
unit;
unit= unit->next_unit())
{
unit->set_unique_exlude();
}
}
}