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Fix for bug#5138: hash indexes on heap tables support statistics.

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KEY::rec_per_key is updated every time 1/HEAP_STATS_UPDATE_THRESHOLD part of table records has been changed.
This commit is contained in:
sergefp@mysql.com
2004-09-08 02:07:53 +04:00
parent 15eb33ab44
commit 2c9d2cf671
14 changed files with 386 additions and 30 deletions
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7
sql/structs.h
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@ -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;