| From: | "Jan B(dot)" <jan(at)monso(dot)de> |
|---|---|
| To: | Markus Bertheau <twanger(at)bluetwanger(dot)de> |
| Cc: | pgsql-sql(at)postgresql(dot)org |
| Subject: | Re: ARRAY() returning NULL instead of ARRAY[] resp. {} |
| Date: | 2005-05-23 18:54:07 |
| Message-ID: | 429226CF.4090207@monso.de |
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| Lists: | pgsql-hackers pgsql-patches pgsql-sql |
Markus Bertheau wrote:
> Hi,
>
> why does SELECT ARRAY(SELECT 1 WHERE FALSE) return NULL instead of
> ARRAY[] resp. '{}'?
>
> Markus
>
Perhaps Arrays always have to contain at least one element? (I don't
know for sure.)
SELECT array[];
ERROR: syntax error at or near "]" at character 14
LINE 1: SELECT array[];
SELECT array[1];
array
-------
{1}
(1 row)
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