How to create FULLTEXT index on multiple columns?

Question

I am running the following query on tbl_query

select * from tbl_query q where match(q.query_desc,q.query_desc_details) against ('test1' WITH QUERY EXPANSION);

It's giving an error

16:46:22    select * from tbl_query q where match(q.query_desc,q.query_desc_details) against ('test1' WITH QUERY EXPANSION) LIMIT 0, 1000   Error Code: 1191. Can't find FULLTEXT index matching the column list    0.078 sec

My table is like this

 CREATE TABLE `tbl_query` (
  `query_id` int(11) NOT NULL AUTO_INCREMENT,
  `query_desc` text NOT NULL,
  `query_desc_details` text,
  PRIMARY KEY (`query_id`),
  KEY `QUERY_DESC` (`query_desc`(333)) USING BTREE,
  KEY `QUERY_DESC_DETAILS` (`query_desc_details`(333)) USING BTREE
) ENGINE=MyISAM AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;

In database full text words boundaries are like

ft_max_word_len=    84
ft_min_word_len=    4

I am searching against two column.
So my question is how to create the full text index for the table?

Mad Dog Tannen · Accepted Answer · 2019-06-24T09:23:50.533

62

Fulltext with 2 columns you create like this

ALTER TABLE tbl_query
ADD FULLTEXT INDEX `FullText` 
(`query_desc` ASC, `query_desc_details` ASC);

edited Jun 24 '19 at 09:23

answered Feb 04 '14 at 11:57

Mad Dog Tannen

7,129
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55

What does ASC do? – Supun Kavinda Apr 18 '19 at 03:54
3

@SupunKavinda 'ASC' indexes in ascending order whereas 'DESC' does it in descending – roneo May 02 '19 at 12:42
How do you use the 'FullText' index. I tried and it keeps saying Error 1054 Unknown column 'FullText' – andrebruton Jul 22 '21 at 18:55

score 25 · Answer 2 · answered Feb 04 '14 at 11:53

25

ALTER TABLE `TableName`
    ADD FULLTEXT INDEX `IndexName` (`ColumnName`);

answered Feb 04 '14 at 11:53

Raghunandan Krishnamurthy

675
5
11

A Paul · Answer 3 · 2021-10-24T02:28:59.740

16

This creates the index. This should work.

ALTER TABLE `TableName` ADD FULLTEXT index_name(column1, column2);

edited Oct 24 '21 at 02:28

answered Feb 04 '14 at 11:47

A Paul

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I added the index but it's showing the same error. Something else need to be done? – Pradeep Kr Kaushal Feb 04 '14 at 11:52
2

nope it should work. Check once useing desc if it is there. Try restarting the mysql once. But this should work. – A Paul Feb 04 '14 at 11:55
`ALTER TABLE tbl_query ADD FULLTEXT index_name(query_desc,query_desc_details);` for 2 columns. – Mad Dog Tannen Feb 04 '14 at 11:59
@KayNelson Does not seem to work when the table has some content already and but when you create a fresh table it works. But is there as way to make it work on tables that is already has quite a bit of data ? I am using 10.1.21-MariaDB – VMN Nov 29 '17 at 12:24

Abdul Rehman · Answer 4 · 2021-04-27T12:10:39.107

2

Add the Index

ALTER TABLE table_name ADD FULLTEXT index_name(column1, column2);

To get the search result

SELECT * FROM table_name WHERE MATCH(column1, column2)
AGAINST('search string' IN NATURAL LANGUAGE MODE);

To drop the index

ALTER TABLE table_name
DROP INDEX index_name;

edited Apr 27 '21 at 12:10

answered Apr 27 '21 at 12:05

Abdul Rehman

21
4

How to create FULLTEXT index on multiple columns?

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