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BUG#29445 - match ... against () never returns

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Part 1:
Do not perform index search for a plus-word with truncation operator
in case there are other plus-words in expression.

Specifically this optimization was enforced for expression like
"+word1 +word2*", but wasn't enforced for expression like
"+word1 word2*".


mysql-test/r/fulltext.result:
  A test case for BUG#29445.
mysql-test/t/fulltext.test:
  A test case for BUG#29445.
storage/myisam/ft_boolean_search.c:
  Do not perform index search for a plus-word with truncation operator
  in case there are other plus-words in expression.
  
  Specifically this optimization was enforced for expression like
  "+word1 +word2*", but wasn't enforced for expression like
  "+word1 word2*".
This commit is contained in:
unknown
2007-07-10 15:37:39 +05:00
parent 4aa0be35ed
commit 3e99fbbb7f
3 changed files with 16 additions and 1 deletions
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6
mysql-test/r/fulltext.result
View File

@ -480,3 +480,9 @@ CREATE TABLE t1(a VARCHAR(2) CHARACTER SET big5 COLLATE big5_chinese_ci,
FULLTEXT(a));
INSERT INTO t1 VALUES(0xA3C2);
DROP TABLE t1;
CREATE TABLE t1(a VARCHAR(20), FULLTEXT(a));
INSERT INTO t1 VALUES('Offside'),('City Of God');
SELECT a FROM t1 WHERE MATCH a AGAINST ('+city of*' IN BOOLEAN MODE);
a
City Of God
DROP TABLE t1;

8
mysql-test/t/fulltext.test
View File

@ -408,4 +408,12 @@ FULLTEXT(a));
INSERT INTO t1 VALUES(0xA3C2);
DROP TABLE t1;
#
# BUG#29445 - match ... against () never returns
#
CREATE TABLE t1(a VARCHAR(20), FULLTEXT(a));
INSERT INTO t1 VALUES('Offside'),('City Of God');
SELECT a FROM t1 WHERE MATCH a AGAINST ('+city of*' IN BOOLEAN MODE);
DROP TABLE t1;
# End of 4.1 tests

3
storage/myisam/ft_boolean_search.c
View File

@ -474,7 +474,8 @@ static void _ftb_init_index_search(FT_INFO *ftb)
ftbe->up->flags|= FTB_FLAG_TRUNC, ftbe=ftbe->up)
{
if (ftbe->flags & FTB_FLAG_NO || /* 2 */
ftbe->up->ythresh - ftbe->up->yweaks >1) /* 1 */
ftbe->up->ythresh - ftbe->up->yweaks >
test(ftbe->flags & FTB_FLAG_YES)) /* 1 */
{
FTB_EXPR *top_ftbe=ftbe->up;
ftbw->docid[0]=HA_OFFSET_ERROR;