Postgresql – Full Text Search With PostgreSQL

full-text-searchpostgresqlpostgresql-9.2

i have a table with this rows:

Stickers
------------------------------------------------------
ID | Title                 |Keywords (ts_vector)
------------------------------------------------------
01 | Sticker Case 580H     |'580h':3 'cas':2 'stick':1
02 | Sticker Case 580L     |'580l':3 'cas':2 'stick':1
03 | Sticker Case 580      |'580':3 'cas':2 'stick':1
04 | Sticker Case Plus 3000|'3000':4 'cas':2 'plus':3 'stick':1

Well, when i do search using this script, just row 03 return, how i do return the row 01 and 02?

SELECT
*
FROM
stickers
WHERE
keywords @@@ to_tsquery('case & 580');

Best Answer

This is not really a use case for full text search because full text relies on stemming the text and parsing the chunks into tokens. As you can see from keywords, '580h' is parsed as its own word because there's no language in which '580' is a "stem" of '580h'. You'd probably be better off with regular expression matching.

Here's a query that I worked up for you:

SELECT id, title 
  FROM stickers WHERE
    (title ~* '580')
      AND
    (title ~* 'case')
ORDER BY id
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