On Oct 20, 2024 at 04:12 +0800, David G. Johnston <[email protected]>,
wrote:
>
> Mostly I'm pointing out the fact that one can never take the null value to be
> the actual value of a setting. In terms of current_setting this then
> establishes the fact that the null value it may return is an error-handling
> alternative only and not something to be relied upon as being an actual value
> of the setting.
> - Returns the current value of the+ Returns the current
> non-null value of the setting <parameter>setting_name</parameter>.
> If there is no such setting, <function>current_setting</function>
> throws an error unless <parameter>missing_ok</parameter> is supplied
> and
Hi,
current_setting() could return NULL when missing_ok is passed, so is it right
to say: Returns the current non-null value of the setting
<parameter>setting_name</parameter>?
As the doc is for function of current_setting(), and it could return NULL
actually.
gpadmin=# \pset null NULL
Null display is "NULL".
gpadmin=# select current_setting('pg_xmen', true);
current_setting
-----------------
NULL
(1 row)
--
Zhang Mingli
HashData
