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BUG#25951 - ignore/use index does not work with fulltext

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IGNORE/USE/FORCE INDEX hints were honored when choosing FULLTEXT
index.

With this fix these hints are ignored. For regular indexes we may
perform table scan instead of index lookup when IGNORE INDEX was
specified. We cannot do this for FULLTEXT in NLQ mode.


mysql-test/r/fulltext.result:
  A test case for bug#25951.
mysql-test/t/fulltext.test:
  A test case for bug#25951.
sql/item_func.cc:
  IGNOR/USE/FORCE INDEX hints should not be honored when choosing FULLTEXT
  index.
  
  Use proper bitmap, that is not modified by IGNORE/USE/FORCE INDEX hints.
This commit is contained in:
unknown 2007-04-13 02:31:34 +05:00
parent f6eca60afb
commit 202f34e2f5
3 changed files with 18 additions and 1 deletions
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7
mysql-test/r/fulltext.result
View file

@ -447,3 +447,10 @@ a MATCH(a) AGAINST('test1 test')
test1 0.68526661396027
DEALLOCATE PREPARE stmt;
DROP TABLE t1;
CREATE TABLE t1 (a VARCHAR(255), FULLTEXT(a));
SELECT * FROM t1 IGNORE INDEX(a) WHERE MATCH(a) AGAINST('test');
a
ALTER TABLE t1 DISABLE KEYS;
SELECT * FROM t1 WHERE MATCH(a) AGAINST('test');
ERROR HY000: Can't find FULLTEXT index matching the column list
DROP TABLE t1;

10
mysql-test/t/fulltext.test
View file

@ -369,4 +369,14 @@ EXECUTE stmt;
DEALLOCATE PREPARE stmt;
DROP TABLE t1;
#
# BUG#25951 - ignore/use index does not work with fulltext
#
CREATE TABLE t1 (a VARCHAR(255), FULLTEXT(a));
SELECT * FROM t1 IGNORE INDEX(a) WHERE MATCH(a) AGAINST('test');
ALTER TABLE t1 DISABLE KEYS;
--error 1191
SELECT * FROM t1 WHERE MATCH(a) AGAINST('test');
DROP TABLE t1;
# End of 4.1 tests

2
sql/item_func.cc
View file

@ -3158,7 +3158,7 @@ bool Item_func_match::fix_index()
for (keynr=0 ; keynr < table->keys ; keynr++)
{
if ((table->key_info[keynr].flags & HA_FULLTEXT) &&
(table->keys_in_use_for_query.is_set(keynr)))
(table->keys_in_use.is_set(keynr)))
{
ft_to_key[fts]=keynr;
ft_cnt[fts]=0;