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Merge gleb.loc:/home/uchum/work/bk/4.1

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into  gleb.loc:/home/uchum/work/bk/4.1-opt
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gshchepa/uchum@gleb.loc 2007-07-08 00:15:53 +05:00
commit 8c8b64797a
1 changed files with 19 additions and 0 deletions
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19
mysys/hash.c
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@ -572,6 +572,25 @@ my_bool hash_update(HASH *hash,byte *record,byte *old_key,uint old_key_length)
previous->next=pos->next; /* unlink pos */
/* Move data to correct position */
if (new_index == empty)
{
/*
At this point record is unlinked from the old chain, thus it holds
random position. By the chance this position is equal to position
for the first element in the new chain. That means updated record
is the only record in the new chain.
*/
if (empty != idx)
{
/*
Record was moved while unlinking it from the old chain.
Copy data to a new position.
*/
data[empty]= org_link;
}
data[empty].next= NO_RECORD;
DBUG_RETURN(0);
}
pos=data+new_index;
new_pos_index=hash_rec_mask(hash,pos,blength,records);
if (new_index != new_pos_index)