Am 16.11.2005 um 13:52 schrieb Oleg Bartunov:
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 ?
No. No fancy-shmancy solution needed, just one that works.
I do not see a way to include both a stemmed and unstemmed version of
a string into a tsquery.
Can you give an example, please?
Thanks
Alex
P.S. I have read the documentation (twice.)
Sincerely yours
Alexander Presber
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Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@xxxxxxxxxx, http://www.sai.msu.su/~megera/
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