Re: Supporting = operator in gin/gist_trgm_ops

Julien Rouhaud <rjuju123(at)gmail(dot)com> writes:
> A french user recently complained that with an index created using
> gin_trgm_ops (or gist_trgm_ops), you can use the index with a clause
> like
> col LIKE 'something'
> but not
> col = 'something'

Huh, I'd supposed we did that already.

> even though both clauses are technically identical. That's clearly
> not a high priority thing to support, but looking at the code it seems
> to me that this could be achieved quite simply: just adding a new
> operator = in the opclass, with an operator strategy number that falls
> back doing exactly what LikeStrategyNumber is doing and that's it.
> There shouldn't be any wrong results, even using wildcards as the
> recheck will remove any incorrect one.

I think you may be overoptimistic about being able to use the identical
code path without regard for LIKE wildcards; but certainly it should be
possible to do this with not a lot of new code. +1.

regards, tom lane