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| author | Igor Babaev <igor@askmonty.org> | 2014-09-09 16:44:54 -0700 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2014-09-09 16:44:54 -0700 |
| commit | 5023bb899dfaf78d85be2e6c08ec22cadcbcf82a (patch) | |
| tree | d46cc221db447c9155e19a1f15eca3be392c8bd5 /sql/sql_join_cache.cc | |
| parent | 20fff8e5bd41aeb8b8c0295dabc3096ba3620099 (diff) | |
| download | mariadb-git-5023bb899dfaf78d85be2e6c08ec22cadcbcf82a.tar.gz | |
Fixed bug mdev-6292.
Avoided exponential recursive calls of JOIN_CACHE::join_records() in the case
of non-nested outer joins.
A different solution is required to resolve this performance problem for
nested outer joins.
Diffstat (limited to 'sql/sql_join_cache.cc')
| -rw-r--r-- | sql/sql_join_cache.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/sql_join_cache.cc b/sql/sql_join_cache.cc index 6ffd0f20b5e..49b523b61be 100644 --- a/sql/sql_join_cache.cc +++ b/sql/sql_join_cache.cc @@ -2087,7 +2087,7 @@ enum_nested_loop_state JOIN_CACHE::join_records(bool skip_last) goto finish; if (outer_join_first_inner) { - if (next_cache) + if (next_cache && join_tab != join_tab->last_inner) { /* Ensure that all matches for outer records from join buffer are to be |