Re: test data type

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От Silvio Emanuel Barbosa de Macedo
Тема Re: test data type
Дата
Msg-id Pine.GSO.3.96.990121131716.11199A-100000@newton.inescn.pt
обсуждение исходный текст
Ответ на test data type  (JT Kirkpatrick <jt-kirkpatrick@mpsllc.com>)
Список pgsql-general
    Hi!

    In the source tree of Postgresql you'll find:

    postgresql-6.4.2/contrib/fulltextindex

    and you'll read README:

---------
The included software is an attempt to add some sort of Full Text Indexing
support to PostgreSQL. I mean by this that we can ask questions like:

        Give me all rows that have 'still' and 'nash' in the 'artist'
field.

Ofcourse we can write this as:

        select * from cds where artist ~* 'stills' and artist ~* 'nash';

But this does not use any indices, and therefore, if your database
gets very large, it will not have very high performance (the above query
requires at least one sequential scan, it probably takes 2 due to the
self-join).
 ....
....
---------
    I haven't tried, nor I'm sure this is the best solution...
    Hope this helps!

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Silvio Emanuel Nunes Barbosa de Macedo
mailto:smacedo@inescn.pt

INESC - Porto - Grupo CAV
Pc da Republica, 93 R/C   Tel:351 2 209 42 21
4000 PORTO  PORTUGAL      Fax:351 2 208 41 72








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