On Wed, 16 Nov 2005, Alexander Presber wrote:
Hello,
I have a question that arose while using tsearch on a large database of book
information.
In order to inject unstemmed + stemmed versions of searchstrings into a query
we want to cast an expression of type text to tsquery.
Unfortunately
SELECT 'word'::tsquery
(where the literal 'word' is of type 'unknown' seemingly) works just fine
while e.g.
SELECT ('word' || '&fullword')::tsquery
or, simpler
SELECT 'word&fullword'::text::tsquery
gives
ERROR: cannot cast type text to tsearch2.tsquery
How can we work around that? Thanks for any help
no workaround needed. to_tsquery provides everything you need. If you
want fancy-shmancy solution you could always write wrapper around tsquery, but
I doubt you enter queries by hand, so why do you bothering ?
Sincerely yours
Alexander Presber
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Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
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