Re: [pg_trgm] Making similarity(?, ?) < ? use an index

On 08.06.2016 12:16, Greg Navis wrote:
> Would this be a better plan then:
>
> 1. Add support for trigram operators.
> 2. Implement `issimilar(lhs, rhs, threshold)`.
> 3. Add `issimilar` to the trigram operator classes.

I think Tom's proposal with composite type is exelent option. If I
understand correctly it introduce a new function similarity_rhs(). You
can use it as the following:

SELECT * FROM restaurants WHERE city % similarity_rhs('warsw', 0.4);
SELECT * FROM cinemas WHERE name % similarity_rhs('warsw', 0.2);

This is what you need?

If I understand correctly your plan differs from Tom's proposal. And I
am afraid that you will do a waste work.

--
Artur Zakirov
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company