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| author | Galina Shalygina <galina.shalygina@mariadb.com> | 2019-02-10 22:36:46 +0300 |
|---|---|---|
| committer | Galina Shalygina <galina.shalygina@mariadb.com> | 2019-02-10 22:36:46 +0300 |
| commit | 3955d2a1539e7e41e3457c99f773d90c90f4f90f (patch) | |
| tree | 25af9196307fc374a935499d6d232cd98515a0f8 /sql/structs.h | |
| parent | 15fe81c571ef81ec834ac91f96c9adb4343ecd05 (diff) | |
| download | mariadb-git-3955d2a1539e7e41e3457c99f773d90c90f4f90f.tar.gz | |
MDEV-18413: Find constraint correlated indexes
Find indexes of one table which parts participate in one constraint.
These indexes are called constraint correlated.
New methods: TABLE::find_constraint_correlated_indexes() and
virtual method check_index_dependence() were added.
For each index it's own constraint correlated index map was created
where all indexes that are constraint correlated with the current are
marked.
The results of this task are used for MDEV-16188 (Use in-memory
PK filters built from range index scans).
Diffstat (limited to 'sql/structs.h')
| -rw-r--r-- | sql/structs.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sql/structs.h b/sql/structs.h index 8aec29bac41..3628cd01748 100644 --- a/sql/structs.h +++ b/sql/structs.h @@ -124,6 +124,8 @@ typedef struct st_key { (only key parts from key definitions are taken into account) */ key_map overlapped; + /* Set of keys constraint correlated with this key */ + key_map constraint_correlated; LEX_CSTRING name; uint block_size; enum ha_key_alg algorithm; |