ignoring mysql fulltext stopwords in query

Question

I\'m building a search for a site, which utilizes a fulltext search. The search itself works great, that\'s not my problem. I string together user provided keywords (MATCH..

Answer 1

You can verify the keywords by comparing all stopwords. Here is the list of stopwords I've found out a solution to disable stopwords from fulltext. You just need to locate .cnf file and add this,

ft_stopword_file = ""

restart mysql engine and rebuild indexes;

Hope this work

Answer 2

For the INNODB case, it is possible to disable stop_words when you create the index.

SET @@SESSION.innodb_ft_enable_stopword = 'OFF';

create table foo
....
fulltext (search_col)

This will cause the full text index to be created with the stopwords disabled. You can verify by using the following queries.

SET GLOBAL innodb_ft_aux_table = 'schema/foo';
select * from information_schema.innodb_ft_config;

Your results will look like this:

Notice that use_stopword is set to 0.

Search for use_stopwords on this mysql documentation page. and Checkout innodb_ft_enable_stopword here

Answer 3

How to disable fulltext stopwords in MySQL:

In my.ini text file (MySQL) :

ft_stopword_file = ""   or link an empty file "empty_stopwords.txt"
ft_min_word_len = 2 

// set your minimum length, but be aware that shorter words (3,2) will increase the query time dramatically, especially if the fulltext indexed column fields are large.

Save the file, restart the server.

The next step should be to repair the indexes with this query:

REPAIR TABLE tbl_name QUICK.

However, this will not work if you table is using InnoDB storage engine. You will have to change it to MyISAM :

ALTER TABLE t1 ENGINE = MyISAM;

So, once again:

1. Edit my.ini file and save
2. Restart your server (this cannot be done dynamically)
3. Change the table engine (if needed)  ALTER TABLE tbl_name ENGINE = MyISAM;
4. Perform repair                       REPAIR TABLE tbl_name QUICK.

Be aware that InnoDB and MyISAM have their speed differences. One read faster, other writes faster ( read more about that on the internet )

Answer 4

setting ft_stopword_file = ""
didn't work for me, I'm using INNODB tables and MySQL 5.6 (stop words still not indexed in full text indexes after optimizing associated table)

this solution works (even if you are not super user) :

CREATE TABLE mydb.stopwordslist(value VARCHAR(20)) ENGINE = INNODB;
INSERT INTO mydb.stopwordslist(value) VALUES ('skipthisword');

for all users but you still need super user rights :

SET GLOBAL innodb_ft_server_stopword_table = 'mydb/stopwordslist';

for just the user (assuming it the one who recreating indexes and updating columns)

SET SESSION innodb_ft_user_stopword_table = 'mydb/stopwordslist';

as it is a session variable, it won't last when your session is closed so please make sure you set it at each session or before you optimize or insert into tables having fulltext index or when you update column indexed by fulltext index

Answer 5

try using MATCH…AGAINST…IN BOOLEAN MODE Like this one: WHERE MATCH(author,title) AGAINST('"origin of"' IN BOOLEAN MODE);

Answer 6

disable stopword for fulltext search in mysql using this steps

1: open my.ini file in mysql

2: place below two line after [mysqld] line in my.ini (search [mysqld] in file)

ft_min_word_len=1
ft_stopword_file=""

3: restart your server

4: repair your table using below command

 > repair table tablename;

5: now your search is working....