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| author | Igor Babaev <igor@askmonty.org> | 2017-03-27 14:41:17 -0700 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2017-03-27 14:41:17 -0700 |
| commit | 93dd70ced8919be8ff9df6581f5f1a509998b6ac (patch) | |
| tree | 300bef5dfa478ddfe991867ea2596de4ae784dfe /sql/sql_union.cc | |
| parent | 046d442d4c3799eb978a629c676e520654436ab5 (diff) | |
| download | mariadb-git-93dd70ced8919be8ff9df6581f5f1a509998b6ac.tar.gz | |
Fixed bug mdev-12375.
The function st_select_lex_unit::exec_recursive() incorrectly determined
that a CTE mutually recursive with some others was stabilized in the case
when the non-recursive part of the CTE returned an empty set. As a result
the server fell into an infinite loop when executing a query using
this CTE.
Diffstat (limited to 'sql/sql_union.cc')
| -rw-r--r-- | sql/sql_union.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/sql_union.cc b/sql/sql_union.cc index 71d0e331101..f8fe8b0be00 100644 --- a/sql/sql_union.cc +++ b/sql/sql_union.cc @@ -1247,7 +1247,7 @@ bool st_select_lex_unit::exec_recursive() thd->inc_examined_row_count(examined_rows); incr_table->file->info(HA_STATUS_VARIABLE); - if (incr_table->file->stats.records == 0) + if (with_element->level && incr_table->file->stats.records == 0) with_element->set_as_stabilized(); else with_element->level++; |