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author | sergefp@mysql.com <> | 2004-09-08 02:07:53 +0400 |
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committer | sergefp@mysql.com <> | 2004-09-08 02:07:53 +0400 |
commit | 2c9d2cf671d33f598dcec7eb5604f98638c96490 (patch) | |
tree | 5fb9bac74cdad46fce2efb3c783f9a02367489bd /sql/structs.h | |
parent | 15eb33ab44b6af9f34e65d941739fadcd0026866 (diff) | |
download | mariadb-git-2c9d2cf671d33f598dcec7eb5604f98638c96490.tar.gz |
Fix for bug#5138: hash indexes on heap tables support statistics.
KEY::rec_per_key is updated every time 1/HEAP_STATS_UPDATE_THRESHOLD part of table records has been changed.
Diffstat (limited to 'sql/structs.h')
-rw-r--r-- | sql/structs.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sql/structs.h b/sql/structs.h index c30d85f59cb..846b3400fab 100644 --- a/sql/structs.h +++ b/sql/structs.h @@ -89,7 +89,12 @@ typedef struct st_key { enum ha_key_alg algorithm; KEY_PART_INFO *key_part; char *name; /* Name of key */ - ulong *rec_per_key; /* Key part distribution */ + /* + Array of AVG(#records with the same field value) for 1st ... Nth key part. + 0 means 'not known'. + For temporary heap tables this member is NULL. + */ + ulong *rec_per_key; union { int bdb_return_if_eq; } handler; |