Re: [BUGS] Re: BUG #14623: pg_trgm doesn't correctly process some regexp with negative lookahead

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
characterclasses. 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

Hmm ... seems unrelated, since there's no lookahead constraint in this
example.  Also, the patch I committed earlier today doesn't fix it.
        regards, tom lane


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