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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.


heap/_check.c:
  Hash indexes on heap tables now support statistics - number of hash buckets. The value is updated on any insert/delete operation.
heap/hp_clear.c:
  Hash indexes on heap tables now support statistics - number of hash buckets. The value is updated on any insert/delete operation.
heap/hp_create.c:
  Hash indexes on heap tables now support statistics - number of hash buckets. The value is updated on any insert/delete operation.
heap/hp_delete.c:
  Hash indexes on heap tables now support statistics - number of hash buckets. The value is updated on any insert/delete operation.
heap/hp_hash.c:
  Hash indexes on heap tables now support statistics - number of hash buckets. The value is updated on any insert/delete operation.
heap/hp_write.c:
  Hash indexes on heap tables now support statistics - number of hash buckets. The value is updated on any insert/delete operation.
include/heap.h:
  Hash indexes on heap tables now support statistics - number of hash buckets. The value is updated on any insert/delete operation.
mysql-test/r/heap.result:
  Fix for bug#5138: store/use statistics for hash indexes on heap tables
mysql-test/r/heap_hash.result:
  Fix for bug#5138: store/use statistics for hash indexes on heap tables
mysql-test/r/myisam.result:
  Fix for bug#5138: store/use statistics for hash indexes on heap tables
mysql-test/t/heap_hash.test:
  Fix for bug#5138: store/use statistics for hash indexes on heap tables
sql/structs.h:
  Added comments
This commit is contained in:
unknown 2004-09-08 02:07:53 +04:00
commit 99e1b8179e
14 changed files with 386 additions and 30 deletions
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23
heap/_check.c
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@ -102,9 +102,11 @@ static int check_one_key(HP_KEYDEF *keydef, uint keynr, ulong records,
int error;
uint i,found,max_links,seek,links;
uint rec_link; /* Only used with debugging */
uint hash_buckets_found;
HASH_INFO *hash_info;
error=0;
hash_buckets_found= 0;
for (i=found=max_links=seek=0 ; i < records ; i++)
{
hash_info=hp_find_hash(&keydef->block,i);
@ -128,21 +130,32 @@ static int check_one_key(HP_KEYDEF *keydef, uint keynr, ulong records,
found++;
}
if (links > max_links) max_links=links;
hash_buckets_found++;
}
}
if (found != records)
{
DBUG_PRINT("error",("Found %ld of %ld records"));
DBUG_PRINT("error",("Found %ld of %ld records", found, records));
error=1;
}
if (keydef->hash_buckets != hash_buckets_found)
{
DBUG_PRINT("error",("Found %ld buckets, stats shows %ld buckets",
hash_buckets_found, keydef->hash_buckets));
error=1;
}
DBUG_PRINT("info",
("records: %ld seeks: %d max links: %d hitrate: %.2f",
("records: %ld seeks: %d max links: %d hitrate: %.2f "
"buckets: %d",
records,seek,max_links,
(float) seek / (float) (records ? records : 1)));
(float) seek / (float) (records ? records : 1),
hash_buckets_found));
if (print_status)
printf("Key: %d records: %ld seeks: %d max links: %d hitrate: %.2f\n",
printf("Key: %d records: %ld seeks: %d max links: %d "
"hitrate: %.2f buckets: %d\n",
keynr, records, seek, max_links,
(float) seek / (float) (records ? records : 1));
(float) seek / (float) (records ? records : 1),
hash_buckets_found);
return error;
}