On Oct 20, 2024 at 04:12 +0800, David G. Johnston <david.g.johnston@gmail.com>, 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
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