Re: Tsearch2 - Error using tsquery object in GROUP BBY

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От Teodor Sigaev
Тема Re: Tsearch2 - Error using tsquery object in GROUP BBY
Дата
Msg-id 456FEE37.8060500@sigaev.ru
обсуждение исходный текст
Ответ на Tsearch2 - Error using tsquery object in GROUP BBY queries  (Henrik Zagerholm <henke@mac.se>)
Ответы Re: Tsearch2 - Error using tsquery object in GROUP BBY  (Henrik Zagerholm <henke@mac.se>)
Список pgsql-general
> The query I'm executing has a GROUP BY clause and because I'm using the
> headline function I need my tsquery object in the SELECT clause and
> therefor also in the GROUP BY clause.
> BUT when executing the query I get the following error. -> "could not
> identify an ordering operator for type tsquery"

Which version do you use? Only 8.2 will have comparison operator for tsquery.

>
> How do I solve this?
Use subselect:
SELECT *, headline(..., to_tsquery()) FROM
{
    SELECT .... GROUP BY ...
);

BTW, for performance reason, it might be useful to use limit in inner select -
headline function is slow enough.


--
Teodor Sigaev                                   E-mail: teodor@sigaev.ru
                                                    WWW: http://www.sigaev.ru/

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