From: | Rob Nikander <rob(dot)nikander(at)gmail(dot)com> |
---|---|
To: | Postgres General <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: querying both text and non-text properties |
Date: | 2018-12-05 14:01:57 |
Message-ID: | 98C9D9E1-D404-47E2-A04A-B41EC2A025E3@gmail.com |
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Lists: | pgsql-general |
> On Dec 4, 2018, at 4:59 PM, Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> wrote:
>
> You have two options:
>
> A combined index:
>
> CREATE EXTENSION btree_gin;
> CREATE INDEX ON fulltext USING gin (to_tsvector('english', doc), color);
>
> That is the perfect match for a query with
>
> WHERE color = 'red' AND to_tsvector('german', doc) @@ to_tsquery('english', 'word');
>
> But you can also create two indexes:
>
> CREATE INDEX ON fulltext USING gin (to_tsvector('english', doc));
> CREATE INDEX ON fulltext (color);
>
> Then you don't need the extension, and PostgreSQL can still use them for the search,
> either only one of them if the condition is selective enough, or a "BitmapAnd" of both.
Thanks! I will try both these methods and compare the performance.
Rob
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