Re: Query with "ILIKE ALL" does not use the index

From: Matthew Hall <mhall(at)mhcomputing(dot)net>
To: pgsql-performance(at)lists(dot)postgresql(dot)org
Subject: Re: Query with "ILIKE ALL" does not use the index
Date: 2018-07-26 17:22:21
Message-ID: 460B4CB5-0D1D-43C8-829B-D7734A84779D@mhcomputing.net
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On Jul 26, 2018, at 9:44 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> Nicolas Even <neven(at)ztel(dot)org> writes:
>> However when I run the same (as far as I understand it) query but with
>> the ALL operator, the index is not used:
>> explain analyze select name from totoz where name ilike all(array['%tot%']);
>
> There's only index support for "op ANY (array)", not "op ALL (array)".
>
> regards, tom lane

Nicolas,

Could you work around the limitation with a two-clause WHERE?

First clause ANY, second clause ALL.

I've done some similar tricks on similar sorts of queries.

Matthew.

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