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From: David G. Johnston <[email protected]>
To: Guyren Howe <[email protected]>
To: [email protected]
Subject: Re: Example for unnest(anyarray, anyarray) fails
Date: Wed, 11 Dec 2019 15:55:01 -0700
Message-ID: <CAKFQuwZZ1vD_fWZqERLkkaC_qGH-X7ijakr0vYLnPWVjqY3wJw@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

On Wed, Dec 11, 2019 at 3:21 PM PG Doc comments form <[email protected]>
wrote:

> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/9.6/functions-array.html
> Description:
>
> [...]

> ghowe=# select unnest(ARRAY[1,2],ARRAY['foo','bar','baz']);
> ERROR:  function unnest(integer[], text[]) does not exist
> LINE 1: select unnest(ARRAY[1,2],ARRAY['foo','bar','baz'])
>                ^
> HINT:  No function matches the given name and argument types. You might
> need
> to add explicit type casts.
>

As your query doesn't place the unnest function in the FROM clause as the
documentation says is required it is to be expected that your query fails.
The subsequent part of that sentence links you over to the section of the
documentation that provides a full example.  The one in the table is
intended as a quick-reference.

David J.

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