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Bug #47930: MATCH IN BOOLEAN MODE returns too many results

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inside subquery

Re-setting a fulltext index was a no-operation if not all
the matches of a search were consumed by reading them.
This was preventing a joined table using a fulltext index
in a subquery that requires only 1 row of output (e.g. EXISTS) 
from working correctly because the second execution of the 
sub-query has the fulltext index cursor in a wrong state and
was not finding results.
Fixed by making the re-init code _ftb_init_index_search() 
to re-set open cursors in addition to depleted ones.
This commit is contained in:
Georgi Kodinov
2009-10-27 14:43:12 +02:00
parent 320ba88290
commit 313c5a01ee
3 changed files with 81 additions and 2 deletions
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3
storage/myisam/ft_boolean_search.c
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@@ -475,8 +475,7 @@ static void _ftb_init_index_search(FT_INFO *ftb)
int i;
FTB_WORD *ftbw;
if ((ftb->state != READY && ftb->state !=INDEX_DONE) ||
ftb->keynr == NO_SUCH_KEY)
if (ftb->state == UNINITIALIZED || ftb->keynr == NO_SUCH_KEY)
return;
ftb->state=INDEX_SEARCH;