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| author | Alexander Nozdrin <alik@sun.com> | 2009-10-16 19:21:54 +0400 |
|---|---|---|
| committer | Alexander Nozdrin <alik@sun.com> | 2009-10-16 19:21:54 +0400 |
| commit | ad8d89cd81a0e15bcd8870cf89b521d2d22c2485 (patch) | |
| tree | e90f13884721a8fc835432328e2e6c2a3b98d13f /include | |
| parent | 2397e6593dd30ab0c9f324f7157daa5e252b371c (diff) | |
| download | mariadb-git-ad8d89cd81a0e15bcd8870cf89b521d2d22c2485.tar.gz | |
Backporting revision from 6.0:
revno: 2617.56.25
committer: Alexander Nozdrin <alik@sun.com>
branch nick: azalea-bugfixing
timestamp: Thu 2009-07-09 20:30:43 +0400
message:
Add a comment in the source (Bug#40358).
Diffstat (limited to 'include')
| -rw-r--r-- | include/my_base.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/include/my_base.h b/include/my_base.h index a01b2ec9b82..70bd9b5e073 100644 --- a/include/my_base.h +++ b/include/my_base.h @@ -255,7 +255,17 @@ enum ha_base_keytype { HA_BINARY_PACK_KEY | HA_FULLTEXT | HA_UNIQUE_CHECK | \ HA_SPATIAL | HA_NULL_ARE_EQUAL | HA_GENERATED_KEY) -#define HA_KEY_HAS_PART_KEY_SEG 65536 /* Key contains partial segments */ +/* + Key contains partial segments. + + This flag is internal to the MySQL server by design. It is not supposed + neither to be saved in FRM-files, nor to be passed to storage engines. + It is intended to pass information into internal static sort_keys(KEY *, + KEY *) function. + + This flag can be calculated -- it's based on key lengths comparison. +*/ +#define HA_KEY_HAS_PART_KEY_SEG 65536 /* Automatic bits in key-flag */ |