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Merge bk-internal.mysql.com:/home/bk/mysql-5.0-engines

Browse source 
into  chilla.local:/home/mydev/mysql-5.0-bug14400
This commit is contained in:
unknown 2006-09-12 09:00:41 +02:00
commit d340a67bfb
3 changed files with 98 additions and 20 deletions
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54
myisam/mi_rkey.c
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@ -94,28 +94,42 @@ int mi_rkey(MI_INFO *info, byte *buf, int inx, const byte *key, uint key_len,
myisam_read_vec[search_flag], info->s->state.key_root[inx]))
{
/*
If we are searching for an exact key (including the data pointer)
and this was added by an concurrent insert,
then the result is "key not found".
If we searching for a partial key (or using >, >=, < or <=) and
the data is outside of the data file, we need to continue searching
for the first key inside the data file
*/
if ((search_flag == HA_READ_KEY_EXACT) &&
(info->lastpos >= info->state->data_file_length))
if (info->lastpos >= info->state->data_file_length &&
(search_flag != HA_READ_KEY_EXACT ||
last_used_keyseg != keyinfo->seg + keyinfo->keysegs))
{
my_errno= HA_ERR_KEY_NOT_FOUND;
info->lastpos= HA_OFFSET_ERROR;
}
else while (info->lastpos >= info->state->data_file_length)
{
/*
Skip rows that are inserted by other threads since we got a lock
Note that this can only happen if we are not searching after an
exact key, because the keys are sorted according to position
*/
if (_mi_search_next(info, keyinfo, info->lastkey,
info->lastkey_length,
myisam_readnext_vec[search_flag],
info->s->state.key_root[inx]))
break;
do
{
uint not_used;
/*
Skip rows that are inserted by other threads since we got a lock
Note that this can only happen if we are not searching after an
full length exact key, because the keys are sorted
according to position
*/
if (_mi_search_next(info, keyinfo, info->lastkey,
info->lastkey_length,
myisam_readnext_vec[search_flag],
info->s->state.key_root[inx]))
break;
/*
Check that the found key does still match the search.
_mi_search_next() delivers the next key regardless of its
value.
*/
if (search_flag == HA_READ_KEY_EXACT &&
ha_key_cmp(keyinfo->seg, key_buff, info->lastkey, use_key_length,
SEARCH_FIND, &not_used))
{
my_errno= HA_ERR_KEY_NOT_FOUND;
info->lastpos= HA_OFFSET_ERROR;
break;
}
} while (info->lastpos >= info->state->data_file_length);
}
}
}