database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-01 03:47:19 +03:00
Code Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

25
heap/hp_write.c
View File

@ -36,7 +36,7 @@ int heap_write(HP_INFO *info, const byte *record)
byte *pos;
HP_SHARE *share=info->s;
DBUG_ENTER("heap_write");
printf("heap_write\n");
#ifndef DBUG_OFF
if (info->mode & O_RDONLY)
{
@ -180,15 +180,31 @@ int hp_write_key(HP_INFO *info, HP_KEYDEF *keyinfo,
DBUG_RETURN(-1); /* No more memory */
halfbuff= (long) share->blength >> 1;
pos= hp_find_hash(&keyinfo->block,(first_index=share->records-halfbuff));
/*
We're about to add one more hash position, with hash_mask=#records.
Entries that should be relocated to that position are currently members
of the list that starts at #first_index position.
At #first_index position there may be either:
a) A list of items with hash_mask=first_index. The list contains
1) entries that should be relocated to the list that starts at new
position we're adding
2) entries that should be left in the list starting at #first_index
position
or
b) An entry with hashnr != first_index. We don't need to move it.
*/
if (pos != empty) /* If some records */
{
do
{
hashnr = hp_rec_hashnr(keyinfo, pos->ptr_to_rec);
if (flag == 0) /* First loop; Check if ok */
{
/* Bail out if we're dealing with case b) from above comment */
if (hp_mask(hashnr, share->blength, share->records) != first_index)
break;
}
if (!(hashnr & halfbuff))
{ /* Key will not move */
if (!(flag & LOWFIND))
@ -245,6 +261,9 @@ int hp_write_key(HP_INFO *info, HP_KEYDEF *keyinfo,
}
}
while ((pos=pos->next_key));
if ((flag & (LOWFIND | HIGHFIND)) == (LOWFIND | HIGHFIND))
keyinfo->hash_buckets++;
if ((flag & (LOWFIND | LOWUSED)) == LOWFIND)
{
@ -265,6 +284,7 @@ int hp_write_key(HP_INFO *info, HP_KEYDEF *keyinfo,
{
pos->ptr_to_rec=recpos;
pos->next_key=0;
keyinfo->hash_buckets++;
}
else
{
@ -280,6 +300,7 @@ int hp_write_key(HP_INFO *info, HP_KEYDEF *keyinfo,
}
else
{
keyinfo->hash_buckets++;
pos->ptr_to_rec=recpos;
pos->next_key=0;
hp_movelink(pos, gpos, empty);