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| author | Igor Babaev <igor@askmonty.org> | 2019-08-30 15:49:07 -0700 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2019-08-30 15:49:07 -0700 |
| commit | d1490c177139faa71cd88af71fdb7d88a8f45000 (patch) | |
| tree | 86086ac8d6816708919e258d10350fb5d4e4bf04 /sql/sql_priv.h | |
| parent | 7060b0320d1479bb9476e0cbd4acc584e059e1ff (diff) | |
| download | mariadb-git-10.3-mdev15777.tar.gz | |
MDEV-15777 Use inferred IS NOT NULL predicates in the range optimizer10.3-mdev15777
This patch introduces the optimization that allows range optimizer to
consider index range scans that are built employing NOT NULL predicates
inferred from WHERE conditions and ON expressions.
The patch adds a new optimizer switch not_null_range_scan.
Diffstat (limited to 'sql/sql_priv.h')
| -rw-r--r-- | sql/sql_priv.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sql/sql_priv.h b/sql/sql_priv.h index 2f37e1106f0..ec7b2ccbdac 100644 --- a/sql/sql_priv.h +++ b/sql/sql_priv.h @@ -222,6 +222,7 @@ #define OPTIMIZER_SWITCH_ORDERBY_EQ_PROP (1ULL << 29) #define OPTIMIZER_SWITCH_COND_PUSHDOWN_FOR_DERIVED (1ULL << 30) #define OPTIMIZER_SWITCH_SPLIT_MATERIALIZED (1ULL << 31) +#define OPTIMIZER_SWITCH_NOT_NULL_RANGE_SCAN (1ULL << 32) #define OPTIMIZER_SWITCH_DEFAULT (OPTIMIZER_SWITCH_INDEX_MERGE | \ OPTIMIZER_SWITCH_INDEX_MERGE_UNION | \ |