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| author | Marko Mäkelä <marko.makela@mariadb.com> | 2019-05-29 22:17:00 +0300 |
|---|---|---|
| committer | Marko Mäkelä <marko.makela@mariadb.com> | 2019-05-29 22:17:00 +0300 |
| commit | f98bb23168ee9bc0da8aa7111f35cf2539986387 (patch) | |
| tree | b7e9c3dc28e9d1fd82eebea077f3ca0aac640218 /sql/sql_const.h | |
| parent | e35676f5557d68c7b51ba47aa73dcdf72eafa436 (diff) | |
| parent | e99ed820d790617a029b03d9c4ab437c246c956a (diff) | |
| download | mariadb-git-f98bb23168ee9bc0da8aa7111f35cf2539986387.tar.gz | |
Merge 10.3 into 10.4
Diffstat (limited to 'sql/sql_const.h')
| -rw-r--r-- | sql/sql_const.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sql/sql_const.h b/sql/sql_const.h index 1f9353cdef3..7aa4249f5ad 100644 --- a/sql/sql_const.h +++ b/sql/sql_const.h @@ -247,6 +247,14 @@ #define DISK_TEMPTABLE_LOOKUP_COST 1.0 #define SORT_INDEX_CMP_COST 0.02 + +#define COST_MAX (DBL_MAX * (1.0 - DBL_EPSILON)) + +#define COST_ADD(c,d) (COST_MAX - (d) > (c) ? (c) + (d) : COST_MAX) + +#define COST_MULT(c,f) (COST_MAX / (f) > (c) ? (c) * (f) : COST_MAX) + + #define MY_CHARSET_BIN_MB_MAXLEN 1 /** Don't pack string keys shorter than this (if PACK_KEYS=1 isn't used). */ |