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| author | Sergei Golubchik <serg@mariadb.org> | 2018-12-30 15:50:20 +0100 |
|---|---|---|
| committer | Sergei Golubchik <serg@mariadb.org> | 2018-12-30 18:30:29 +0100 |
| commit | 67240858b2bfa0afc436d88fc9da0595e1391b60 (patch) | |
| tree | 27dc23ebefa72cb2fd7aaa02722da3ba424bbf9e /sql/sql_const.h | |
| parent | cf9070a8f7dec309878e464b277db7dbb3556cf0 (diff) | |
| parent | aeefd26ecb1089678e343c64998749e9f2e3a1e4 (diff) | |
| download | mariadb-git-67240858b2bfa0afc436d88fc9da0595e1391b60.tar.gz | |
Merge branch '10.1' into 10.2mariadb-10.2.21
Diffstat (limited to 'sql/sql_const.h')
| -rw-r--r-- | sql/sql_const.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sql/sql_const.h b/sql/sql_const.h index 7395ae3c08a..abadfbe48ff 100644 --- a/sql/sql_const.h +++ b/sql/sql_const.h @@ -33,7 +33,17 @@ #define MAX_SYS_VAR_LENGTH 32 #define MAX_KEY MAX_INDEXES /* Max used keys */ #define MAX_REF_PARTS 32 /* Max parts used as ref */ -#define MAX_KEY_LENGTH 3072 /* max possible key */ + +/* + Maximum length of the data part of an index lookup key. + + The "data part" is defined as the value itself, not including the + NULL-indicator bytes or varchar length bytes ("the Extras"). We need this + value because there was a bug where length of the Extras were not counted. + + You probably need MAX_KEY_LENGTH, not this constant. +*/ +#define MAX_DATA_LENGTH_FOR_KEY 3072 #if SIZEOF_OFF_T > 4 #define MAX_REFLENGTH 8 /* Max length for record ref */ #else |