I have the following MySQL query:
SELECT title, description
FROM some_table
WHERE MATCH (title,description) AGAINST ('+denver (REGEXP "[[:<:]]colorado[s]*[[:>:]]")' IN BOOLEAN MODE);
the "regexp" here looks for a "complete word" colorado (with or without the ending "s").
I want to actually select only those rows that have ("denver") AND ("colorado" or "colorados"). But I cannot put a "+" for the REGEXP. I tried but got 0 results, although there are rows in the table that match the requirement.
Any ideas on how I can get the "+" to work within against using a REGEXP?
I am constructing this from within a PHP script where "denver" and "colorado" are values of variables I use to construct the select statement.
My PHP/MySQL script would look somewhat like this:
SELECT title, description
FROM some_table
WHERE MATCH (title,description) AGAINST ('+$var1 (REGEXP "[[:<:]]$var2[s]*[[:>:]]")' IN BOOLEAN MODE);
I don't think it's possible to combine regular expressions and MATCH ... IN BOOLEAN MODE. You need to use the syntax for writing boolean expressions.
Boolean Full-Text Searches
Try something like this:
SELECT title, description
FROM some_table
WHERE MATCH (title,description)
AGAINST ('+denver +(colorado colorados)' IN BOOLEAN MODE);
Related
as everyone knows LIKE is too slow, but when I try to use MATCH AGAINST instead, its useless.
I need some operand that give the result such as LIKE '%part%' When "part" is part of the word not a complete word.
I have already tried
SELECT * FROM `table` WHERE MATCH (title) AGAINST ('*part*' IN BOOLEAN MODE)
SELECT * FROM `table` WHERE MATCH (title) AGAINST ('+*part*' IN BOOLEAN MODE)
and its not working
any solution?
You can only match words with a wildcard from the beginning of the word. As the documentation explains:
*
The asterisk serves as the truncation (or wildcard) operator. Unlike
the other operators, it is appended to the word to be affected. Words
match if they begin with the word preceding the * operator.
I' trying to write a MYSQL query which looks for a string in an aggregation of fields.
The following query finds all the concatenations where "io sono" is present:
SELECT chapter, GROUP_CONCAT(text_search) AS aggregated_chapters
FROM bible_it_cei_2008
GROUP BY chapter
HAVING aggregated_chapters LIKE '%io sono%';
However, trying to use MATCH... AGAINST instead of LIKE:
SELECT chapter, GROUP_CONCAT(text_search) AS aggregated_chapters
FROM bible_it_cei_2008
GROUP BY chapter
HAVING MATCH ( aggregated_chapters ) AGAINST ( '+"io sono"' IN BOOLEAN MODE);
returns the error:
#1210 - Incorrect arguments to MATCH
Isn't there any way to use MATCH AGAINST with GROUP_CONCAT?
Isn't there any way to use MATCH AGAINST with GROUP_CONCAT?
No. That's not the way FULLTEXT search works in MySQL.
If your table contains the columns chapter and text_search, and you hope to find the values of chapter matching text search, you want something like this.
SELECT chapter,
MATCH(text_search) AGAINST ('+"io sono"' IN NATURAL LANGUAGE MODE) AS score
FROM bible_it_cei_2008
To get this to work you'll need to create an appropriate FULLTEXT index.
Table
id name
--- ------
1 chinu
2 sanjib
3 chinmay
My MYSQL Query
SELECT * FROM users WHERE MATCH (name) AGAINST ('chi' IN BOOLEAN MODE)
In above query i am getting 0 record.
My output will be coming
1 chinu
3 chinmay
How to get my actual record using MATCH...AGAINST query?
EDIT - If i am searching chinu instead of chi i am getting 1 record.
You need to add an asterisk to the 'chi' to indicate that the query should match against all that contain the string and not just the string itself. Just using the string 'chi' will only match exactly 'chi' for example.
change your query to read
SELECT * FROM users WHERE MATCH (name) AGAINST ('chi*' IN BOOLEAN MODE)
and you should get the results you expect.
I think you forgot the + sign:
SELECT * FROM users WHERE MATCH (name) AGAINST ('+chi' IN BOOLEAN MODE)
Or if it is an exact phrase, use double quotes to surround the string:
SELECT * FROM users WHERE MATCH (name) AGAINST ('"chi"' IN BOOLEAN MODE)
I am the first to admit that this is not easy to find. MySQL full text search uses a system variable called ft_min_word_length. The default value is 4, as shown here.
Because you are searching for a 3-character word, it is not being indexed. Hence it is not found.
More information is available in the documentation on fine tuning the search. But the basic idea is that you need to change the value of the parameter and rebuild the index.
For your particular query, though, you just need to include wildcards, as explained in other answers.
I can search for all rows with foo in the col1/col2 using match against:
SELECT col1, col2
FROM some_table
WHERE MATCH (col1,col2)
AGAINST ('foo' IN BOOLEAN MODE);
But suppose I want to search for all rows with foo. (i.e. foo with a full-stop as the next character). On the docs page for Boolean Full-Text Searches, it doesn't mention full-stop being an operator, so I thought I could use either of these:
AGAINST ('foo.' IN BOOLEAN MODE);
AGAINST ('"foo."' IN BOOLEAN MODE);
AGAINST ('"foo\."' IN BOOLEAN MODE);
However, this returns the same results as:
AGAINST ('foo.couldBeAnything' IN BOOLEAN MODE);
AGAINST ('foo' IN BOOLEAN MODE);
AGAINST ('foo*' IN BOOLEAN MODE);
.
What is the . operator in this context? and how can I match-against foo.?
Note: I first asked this question about match-against foo.bar which led me to ask this follow up.
Full-stop, or indeed any punctuation, is treated like a space in a FULL-TEXT SEARCH, unfortunately this means there is no way to search for punctuation. The reasoning behind this is that text search is for finding "words" (which don't include punctuation).
To do such a search against punctuation, you could match against regular expressions, e.g. by using preg_match.
I can search for rows with both foo and bar in the col1/col2 using match against:
SELECT col1, col2
FROM some_table
WHERE MATCH (col1,col2)
AGAINST ('+foo +bar' IN BOOLEAN MODE);
But suppose I want to search for the exact phrase "foo.bar" (with a full-stop in the middle). On the docs page for Boolean Full-Text Searches, it doesn't mention full-stop being an operator, so I thought I could use:
AGAINST ('+foo.bar' IN BOOLEAN MODE);
However, this returns the same results as:
AGAINST ('+foo.couldBeAnything' IN BOOLEAN MODE);
AGAINST ('+foo' IN BOOLEAN MODE);
AGAINST ('+foo.*' IN BOOLEAN MODE); #Note you would expect this to look for instances of foo. followed by something, rather than just the same as foo
.
Why isn't this working as I expect? and how can I match against for foo.bar?
I don't have a fulltext table readily available to test this out, but I believe this should work:
SELECT col1, col2
FROM some_table
WHERE MATCH (col1,col2)
AGAINST ('+\"foo.bar\"' IN BOOLEAN MODE);
To make this work, you need to suround your literal by a double quote: "bar.foo",
because the point is probably equivalent to or operator.