Re: != ANY(array) does not behave as expected

From: Thomas Kellerer <spam_eater(at)gmx(dot)net>
To: pgsql-general(at)lists(dot)postgresql(dot)org
Subject: Re: != ANY(array) does not behave as expected
Date: 2018-12-07 13:20:55
Message-ID: a56a738e-ce00-2e0d-f346-6c969f30836d@gmx.net
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Thomas Kellerer schrieb am 07.12.2018 um 13:48:
> Chris Wilson schrieb am 07.12.2018 um 13:39:
>> However, if we try to invert it by using the != operator, then we get unexpected results:
>>
>> select * from foo where id NOT IN (1, 2); /* returns row 3 only, as expected */
>> select * from foo where id != ANY (ARRAY[1, 2]); /* returns all rows, unexpected */
>
> id <> ANY (...) means: return "true" if at least one of the elements is not equal to the value on the left side.
>
> What you are looking for is the ALL operator
>
> select *
> from foo
> where id <> ALL (ARRAY[1, 2]);
>
> That is essentially the equivalent to NOT IN

See here for a longer explanation:

https://stackoverflow.com/a/10675636

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