From: Tom Lane <tgl@sss.pgh.pa.us>
To: Luigi Saggese <luigisag@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Performance ts_vector fulltext search
Date: Thu, 11 Apr 2013 10:58:46 -0400
Message-ID: <2751.1365692326@sss.pgh.pa.us> (raw)
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Luigi Saggese <luigisag@gmail.com> writes:
> I've configured 2 table like this
> ...
> CREATE INDEX "ix_fulltext_usp_what" ON "public"."User_Statement_Pivot"
> ("to_tsvector('italian'::regconfig, ""What""::text)",
> "to_tsvector('italian'::regconfig, ""What""::text)");
When I try that I get
ERROR: column "to_tsvector('italian'::regconfig, "What"::text)" does not exist
as indeed I should, because you seem to be confused about SQL quoting
rules --- that whole expression is being taken as a name. However, the
bigger problem here is that you're creating btree indexes, which are not
useful for full text search. They need to be gin or gist indexes. See
examples at
http://www.postgresql.org/docs/9.2/static/textsearch-tables.html#TEXTSEARCH-TABLES-INDEX
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, luigisag@gmail.com
Subject: Re: Performance ts_vector fulltext search
In-Reply-To: <2751.1365692326@sss.pgh.pa.us>
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