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Re: Document aggregate functions better w.r.t. ORDER BY - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: Document aggregate functions better w.r.t. ORDER BY
Date
Msg-id ZTrwJxA7GWMzXXpg@momjian.us
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In response to Re: Document aggregate functions better w.r.t. ORDER BY  ("David G. Johnston" <david.g.johnston@gmail.com>)
Responses Re: Document aggregate functions better w.r.t. ORDER BY
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On Thu, Oct 26, 2023 at 03:44:14PM -0700, David G. Johnston wrote:
> On Thu, Oct 26, 2023 at 3:36 PM Bruce Momjian <bruce@momjian.us> wrote:
> 
>     No sneaking.  ;-)  It would be bad to document this unevenly because it
>     sets expectations in other parts of the system if we don't mention it.
> 
> 
> Agreed.
> 
> Last suggestion, remove the first jsonb_agg example that lacks an order by.
> 
> +WITH vals (k, v) AS ( VALUES ('key0','1'), ('key1','3'), ('key1','2') )
> +SELECT jsonb_object_agg(k, v) FROM vals;
> +      jsonb_object_agg
> +----------------------------
> + {"key0": "1", "key1": "2"}
> +
> 
> We shouldn't write an example that relies on the rows being evaluated 1-2-3
> without specifying an order by clause.

Sure, done in the attached patch.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  Only you can decide what is important to you.
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