I enabled the extension `pg_trgm`.
I thought to query like:
SELECT "videos".*
FROM "videos"
WHERE ( array_to_string(tags, ', ') ilike '%web shorts%' ) AND EXISTS ( SELECT FROM unnest(tags)
ASu(val) WHERE u.val ILIKE '%web shorts%' )
;
And to do I wanted to add an index like:
CREATE INDEX trgm_idx_video_tags ON videos USING gist ((array_to_string(tags, ', ')) gist_trgm_ops)
But on running this I get an error as:
ERROR: functions in index expression must be marked IMMUTABLE
How can I fix this?
> On Nov 8, 2017, at 4:02 PM, Arup Rakshit <aruprakshit1987@outlook.com> wrote:
>
> Hi,
>
> I do have a videos table, and it has a column called `tags` of type array. I would like to select all videos where
anystring inside tag column matches a given substring. What method should I use? The *Contains `@>` operator* will do
fullstring comparisons as far as I understood.
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