全文搜索mysql中的撇号

Question

When I searched for citroen in search page like that I get result but if I search blackn roll I dont get result because it's written like black'n roll in the table. Some user may also wanna search blackn roll but doesnt get result. How can I fix it? And also rows like v-hr and speacial characters like "&/(). I want the mysql to ignore them.

$sql = "SELECT * FROM arac 
        INNER JOIN suv_marka ON arac.marka = suv_marka.id 
        WHERE match(suv_marka.marka) against('citroen')";

Answer 1

If you know the characters (to be replaced) already then, you can use MySQL's REPLACE function to replace them with % and perform LIKE comparison, eg:

create table test(value varchar(100));
insert into test values ('black''n roll');


SELECT value 
FROM test 
WHERE 'blackn roll' LIKE CONCAT('%', REPLACE(value, '''', '%'), '%');

You can replace 'blackn roll' with your input string and use nested REPLACE functions if you need to replace more than one character.

Answer 2

The back-slash is MySQL's escape character. You can try the following... Full text indexing gets a little weird because of word terminators.

$sql = "SELECT * FROM arac 
        INNER JOIN suv_marka ON arac.marka = suv_marka.id 
        WHERE match(suv_marka.marka) against ('black\'n roll' IN BOOLEAN MODE);"

If that doesn't work, then try looking for the words individually. Word length is also a factor, small words (less than 4 characters by default) are not indexed.

$sql = "SELECT * FROM arac 
        INNER JOIN suv_marka ON arac.marka = suv_marka.id 
        WHERE match(suv_marka.marka) against ('black' + 'roll' IN BOOLEAN MODE);"