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| author | Igor Babaev <igor@askmonty.org> | 2011-05-27 00:03:55 -0700 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2011-05-27 00:03:55 -0700 |
| commit | c9a349488b95a9a938564fe1ac06dafc70db5864 (patch) | |
| tree | db5bff7867f4d077edaf2a9c9b4a737e25973dbf /sql/sql_union.cc | |
| parent | 317e04ce67d97ab4a11582236f1e46ccf25c94fb (diff) | |
| download | mariadb-git-c9a349488b95a9a938564fe1ac06dafc70db5864.tar.gz | |
Applied Sanja's patch to fix LP bug #784297 in the tree for mwl106.
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.
Diffstat (limited to 'sql/sql_union.cc')
| -rw-r--r-- | sql/sql_union.cc | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sql/sql_union.cc b/sql/sql_union.cc index 255f5311ac3..c6a6349fd4e 100644 --- a/sql/sql_union.cc +++ b/sql/sql_union.cc @@ -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(); + } + } +} + |