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| author | Marko Mäkelä <marko.makela@mariadb.com> | 2019-05-29 11:32:46 +0300 |
|---|---|---|
| committer | Marko Mäkelä <marko.makela@mariadb.com> | 2019-05-29 11:32:46 +0300 |
| commit | 90a91936852368774559a3ef2660e63e1e6f50e3 (patch) | |
| tree | 97004f253bea0db37606928b592ae3bc70fa6672 /sql/sql_const.h | |
| parent | fcb68ffe3dfb1c841852bd62a9aac9708888f4e9 (diff) | |
| parent | 6eefeb6fea05ff17d010d173ef244a1d92078d71 (diff) | |
| download | mariadb-git-90a91936852368774559a3ef2660e63e1e6f50e3.tar.gz | |
Merge 10.2 into 10.3
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 b3412af31fe..06f9a6042ad 100644 --- a/sql/sql_const.h +++ b/sql/sql_const.h @@ -243,6 +243,14 @@ #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). */ |