Re: tsearch thoughts - Mailing list pgsql-hackers

From Teodor Sigaev
Subject Re: tsearch thoughts
Date
Msg-id 3DEB21A7.6050201@stack.net
Whole thread Raw
In response to tsearch thoughts  ("Christopher Kings-Lynne" <chriskl@familyhealth.com.au>)
List pgsql-hackers
> I mean, when the index is created over the text column, instead of just
> indexing the text as-is, index the txt2txtidx'd version...?

For two reasons:
1. gist_txtidx_ops create with loss information (for less size), so any 
operation with index must be checked
with original txtidx value. The way " REATE INDEX my_idx ON test USING 
gist(txt2txtidx(a))" may decreas performance :(
2 OpenFTS. We wanted that txtidx works with OpenFTS. And adding dictionaries, 
txt2txtidx, trigger, type mquery_txt etc
was an experiment.
-- 
Teodor Sigaev
teodor@stack.net




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