I have created a fulltext index in mysql.
I configured the index by song name, but the song title consisting only of special characters cannot be searched.
music[table] - title[column] is indexed, settings innodb_ft_min_token_size = 1, stopword is disabled.
If the song name is '$$$'.
select * from music where match(title) against('$$$' in boolean mode);
select * from music where match(title) against('"$$$"' in boolean mode);
select * from music where match(title) against('+$$$*' in boolean mode);
None of the above codes work, and even just one $ gives the same result. (numbers, English have been confirmed to operate normally.)
I have a question because I don't know which setting to change after this..!
Related
I am creating a search service using mysql's fulltext-index.
I use it by setting innodb_ft_min_token_size = 1. (Support 1 character search)
The reason for the change from ngram is that ngram=1 takes too much load because there is a lot of data.
Here's a question.
If the name is 'ABCDEF' and the search keyword is 'ABC'
SELECT * FROM SEARCH_TABLE WHERE MATCH(NAME) AGAINST('+*ABC*' IN BOOLEAN MODE);
The above query finds 'ABCDEF' normally.
SELECT * FROM SEARCH_TABLE WHERE MATCH(NAME) AGAINST('+*ABC* +*DEF*' IN BOOLEAN MODE);
But this query doesn't find 'ABCDEF'.
What could be the reason and how can I fix this?
I am trying to make a query where I select all the rows that do not contain a specific word, for this I have a fulltext type index in this column, try the following bolt works:
SELECT *
FROM products
WHERE MATCH(title) AGAINST(' -Dolo' IN BOOLEAN MODE)
So how can I perform this search?
If I have understood you correctly you want to find all the rows from the table that do not contain a word'Dolo'.
Well you can use NOT operator for that.
SELECT *
FROM products
WHERE NOT MATCH(title) AGAINST('Dolo');
Here is a DEMO.
Also, you can use it like this(because as the OP has asked: "if the whole word is "dolorem", would this query work?"):
SELECT title as Title
, MATCH(title) AGAINST('Dolo*' IN BOOLEAN MODE) as Score
FROM products
WHERE MATCH(title) AGAINST('Dolo*' IN BOOLEAN MODE) = 0;
* is a wildcard.
Other signs are described here: https://dev.mysql.com/doc/refman/8.0/en/fulltext-boolean.html
Here is the DEMO for the second example.
The MySQL version is 5.1.40
The table is MyISAM(only changed the table to MyISAM)
The type of table_column(name) is varchar
When I apply the fullText search, it doesn't work.
Below sql only return data 'eeee', will not return such as 'eeeefff' or 'ffeeee'
select name from test where match(name) against('eeee' in boolean mode);
MySQL's full text search lets you search for keywords beginning, but not ending, in a certain substring. So, to find all words beginning with eeee we can try:
SELECT name
FROM test
WHERE MATCH(name) AGAINST('eeee*' IN BOOLEAN MODE);
I want relevancy for exact "production house in goa". it also results anything that contain Goa.
SELECT * FROM `app_search` WHERE MATCH (`keywords`) AGAINST
("production house in goa" in boolean mode)
order by MATCH (`keywords`) AGAINST ("production house in goa" in boolean mode)
desc, rank desc;
Thanks
Deleting old table and recreating with fulltext index on keywords and below query solve the problem.
SELECT *, MATCH (`keywords`) AGAINST
('software development in florida'
IN BOOLEAN MODE) AS score
FROM `ftextsearch` WHERE MATCH (keywords) AGAINST
('software development in florid'
IN BOOLEAN MODE) order by score desc,rank desc
Query also return relevancy of search in score.
I have a table with a fulltext on one column "volltext" type is mediumtext. The fulltext index is "volltext". I matched words on it like
SELECT * FROM `volltextsuche` WHERE MATCH(volltext) AGAINST('+search' IN BOOLEAN MODE)
this will find any occurence correctly.
BUT never for more (no matter how often it is in the text).
SELECT * FROM `volltextsuche` WHERE MATCH(volltext) AGAINST('+more' IN BOOLEAN MODE)
Text example: "more Gil Coste Corbo More
Fragile Ästhetik"
Wrapping the word with `` does not help.
SELECT * FROM `volltextsuche` WHERE MATCH(volltext) AGAINST('+`more`' IN BOOLEAN MODE)
What is this for a remarkable behaviour?
more is a stopword of fulltext search at mysql
http://dev.mysql.com/doc/refman/5.1/en/fulltext-stopwords.html