From: Tom Lane <tgl@sss.pgh.pa.us>
To: Corey Csuhta <its+postgres@csuhta.com>
Cc: pgsql-bugs@postgresql.org
Subject: Re: Re: BUG #14623: pg_trgm doesn't correctly process some regexp with negative lookahead
Date: Fri, 14 Apr 2017 14:53:10 -0400
Message-ID: <12895.1492195990@sss.pgh.pa.us> (raw)
In-Reply-To: <E2B01A4B-4530-406B-8D17-2F67CF9A16BA@csuhta.com>
References: <E2B01A4B-4530-406B-8D17-2F67CF9A16BA@csuhta.com>
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Corey Csuhta <its+postgres@csuhta.com> writes:
> I don’t know if this is related or a separate bug, but I am also having this problem with the `+` operator and character classes. Very similar test case:
> CREATE TABLE foobar (x text);
> INSERT INTO foobar VALUES ('Trying +1/+1'),('Also doing +20/+20');
> CREATE EXTENSION pg_trgm;
> CREATE INDEX ON foobar USING gin (x gin_trgm_ops);
> SET enable_seqscan TO on;
> SELECT * FROM foobar WHERE x ~ '\+\d+\/\+\d+'; -- Returns both rows
> SET enable_seqscan TO off;
> SELECT * FROM foobar WHERE x ~ '\+\d+\/\+\d+'; -- Returns 0 rows
I've pushed a fix for this. Thanks for the report!
regards, tom lane
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To: pgsql-bugs@postgresql.org
Cc: tgl@sss.pgh.pa.us, its+postgres@csuhta.com
Subject: Re: Re: BUG #14623: pg_trgm doesn't correctly process some regexp with negative lookahead
In-Reply-To: <12895.1492195990@sss.pgh.pa.us>
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