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Mysql match() againts() giving some problems to me?

Posted on 2010-11-11
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Last Modified: 2012-05-10
Hello, I have a litle query that I am using to search inside a database, I have a fulltext index for the fields "titulo & descripcion", and the query works... the problem comes when I put something that doesn't exist in the database (like the search I have in the query "280394829038402938409283403409240240849") this shouldn't give results but the problem is that it keeps giving me results... is there something I am doing wrong?

Thank's

SELECT * , MATCH(titulo, descripcion) AGAINST ('280394829038402938409283403409240240849') as coincidencia from preguntas order by coincidencia DESC
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Question by:visionari
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Expert Comment

by:Terry Woods
ID: 34116472
The match relevance is returned as a positive floating point number, or 0 for no similarity. It must be deciding there is a small similarity somehow! Try this:

SELECT * , MATCH(titulo, descripcion) AGAINST ('280394829038402938409283403409240240849'  IN BOOLEAN MODE) as coincidencia from preguntas order by coincidencia DESC
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Author Comment

by:visionari
ID: 34130439
mmh, not really working for me, all I get is 0 in coincidencia even in keywords that exist...
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Accepted Solution

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Guy Hengel [angelIII / a3] earned 500 total points
ID: 34133892
you have to put that into the WHERE also!
SELECT * , MATCH(titulo, descripcion) AGAINST ('280394829038402938409283403409240240849') as coincidencia 
  FROM preguntas 
 WHERE MATCH(titulo, descripcion) AGAINST ('280394829038402938409283403409240240849') 
ORDER BY coincidencia DESC 

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Author Closing Comment

by:visionari
ID: 34171859
Thank's!
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