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I'm getting a bit confused when trying to set up a search utilizing fulltext search in boolean mode. Here is the query I'm using:
$query = "SELECT *,
MATCH(title) AGAINST('$q' IN BOOLEAN MODE) AS score
FROM results
WHERE MATCH(title) AGAINST('$q' IN BOOLEAN MODE)
ORDER BY score DESC";
When I run a search for +divorce+refinance, the results returned are:
1) Divorce: Paying Off Spouse = Rate/Term Refinance
2) Divorce - What to Look Out For Regarding Divorced Borrowers
Am I right in thinking that the second result should not be appearing, as it does not have both words? If not, how can I create that functionality?
784
A Boolean search mode is an additional form of full-text search in MySQL. It is more word-driven than the natural language search that means it searches for words instead of the concept.
Using the LIKE operator gives you 100% precision with no concessions for recall. A full text search facility gives you a lot of flexibility to tune down the precision for better recall. Most full text search implementations use an "inverted index".
MySQL does not have a boolean (or bool) data type. Instead, it converts boolean values into integer data types (TINYINT). When you create a table with a boolean data type, MySQL outputs data as 0, if false, and 1, if true.
Full-text indexes are created on text-based columns ( CHAR , VARCHAR , or TEXT columns) to speed up queries and DML operations on data contained within those columns. A full-text index is defined as part of a CREATE TABLE statement or added to an existing table using ALTER TABLE or CREATE INDEX .
Maybe I am mistaken, but if you search this string +divorce+refinance you get a weird result. If you want to search both words, your should search for +divorce +refinance (with a space between).
I tested it and it returns only one row:
Divorce: Paying Off Spouse = Rate/Term Refinance
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