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| author | Varun Gupta <varun.gupta@mariadb.com> | 2021-02-05 23:54:28 +0530 |
|---|---|---|
| committer | Varun Gupta <varun.gupta@mariadb.com> | 2021-02-06 12:09:36 +0530 |
| commit | 9b8c3ee965e5a736bc972a749bdd2e38ecacfad5 (patch) | |
| tree | 742621383c7b7841d63927cfd8c4fbe2217592c3 /sql/sql_select.cc | |
| parent | f91641b4fa56ddddfb250b2cffbc464cd544e95f (diff) | |
| download | mariadb-git-9b8c3ee965e5a736bc972a749bdd2e38ecacfad5.tar.gz | |
Using recurisive descent instead of walk to check if the join cardinality estimates are precise10.5-mdev8306
Diffstat (limited to 'sql/sql_select.cc')
| -rw-r--r-- | sql/sql_select.cc | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 896277da6cc..a4464299659 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -8486,7 +8486,12 @@ choose_plan(JOIN *join, table_map join_tables) if (join->conds && (join->sort_nest_possible || thd->trace_started())) { bool cardinality_accurate; - cardinality_accurate= join->conds->with_accurate_selectivity_estimation(); + SAME_FIELD arg= {NULL, FALSE}; + cardinality_accurate= + join->conds-> + with_accurate_selectivity_estimation(&Item::predicate_selectivity_checker, + &arg, TRUE); + wrapper.add("cardinality_accurate", cardinality_accurate); if (!cardinality_accurate) |