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yet another ft-trunc bug fixed

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unknown
2002-05-15 20:31:24 +02:00
parent ac6c4f6cb7
commit 19eb09ae8a
4 changed files with 27 additions and 13 deletions
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32
myisam/ft_boolean_search.c
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@ -200,25 +200,31 @@ void _ftb_init_index_search(FT_INFO *ftb)
{
ftbw=(FTB_WORD *)(ftb->queue.root[i]);
if (ftbw->flags&FTB_FLAG_TRUNC) /* special treatment :(( */
if (ftbw->up->ythresh > test(ftbw->flags&FTB_FLAG_YES))
if (ftbw->flags&FTB_FLAG_TRUNC)
/* special treatment for truncation operator :((
1. +trunc* and there're other (not +trunc*) words
| no need to search in the index, it can never ADD new rows
| to the result, and to remove half-matched rows we do scan anyway
2. -trunc*
| same as 1.
3. trunc*
| We have to index-search for this prefix.
| It may cause duplicates, as in the index (sorted by <word,docid>)
| <aaaa,row1>
| <aabb,row2>
| <aacc,row1>
| Searching for "aa*" will find row1 twice...
*/
if ( test(ftbw->flags&FTB_FLAG_NO) || /* 2 */
(test(ftbw->flags&FTB_FLAG_YES) && /* 1 */
ftbw->up->ythresh - ftbw->up->yweaks >1)) /* 1 */
{
/* no need to search for this prefix in the index -
* it cannot ADD new matches, and to REMOVE half-matched
* rows we do scan anyway */
ftbw->docid[0]=HA_POS_ERROR;
ftbw->up->yweaks++;
continue;
}
else
else /* 3 */
{
/* We have to index-search for this prefix.
* It may cause duplicates, as in the index (sorted by <word,docid>)
* <aaaa,row1>
* <aabb,row2>
* <aacc,row1>
* Searching for "aa*" will find row1 twice...
*/
if (!is_tree_inited(& ftb->no_dupes))
{
init_tree(& ftb->no_dupes,0,0,sizeof(my_off_t),