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boolean search returns different result with / without fulltext index
Posted by: Martin Feng
Date: July 23, 2006 08:01PM

I have a table having full text index built on 2 columns (COL_TITLE, COL_TEXT), around 570,000 rows.

When the full text index is disabled by 'alter table disable keys', query

SELECT COUNT(*) FROM TBL_PAPERS WHERE MATCH (COL_TITLE, COL_TEXT) AGAINST (@words IN BOOLEAN MODE);

returns 271.

where @words is a long phrase list:

"adventure racing" "archery" "aviation" "beachcombing" "biking" ...

total 1129 chracters. no full text boolean search operators.

When the full text index is enabled by 'alter table disable keys', the same query

return 20006.

Which result should I believe? I tried 3 times to enable / disable keys, and the result is same

------------------------------
My environment:

MySQL 5.0.22, installed from MySQL-server-standard-5.0.22-0.rhel4.i386.rpm and MySQL-Max-5.0.22-0.i386.rpm,
OS: CentOS 4.3
DB: CHARACTER SET utf8 COLLATE utf8_general_ci

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boolean search returns different result with / without fulltext index
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