Hello Pavel,
>> \echo :VERSION
>> PostgreSQL 10devel on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu
>> 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609, 64-bit
>>
>> Probably some :VERSION_NUM would make some sense. See attached PoC patch.
>> Would it make sense?
>
> Maybe better name for you CLIENT_VERSION_NUM
If it was starting from nothing I would tend to agree with you, but there
is already an existing :VERSION variable, so it seemed logical to keep on
and create variants with the same prefix.
> Can be SERVER_VERSION_NUM taken from connection info?
Probably it could. It seems a little less straightforward than defining a
client-side string at compile time. The information is displayed when the
connection is established, so the information is there somewhere.
psql (10devel, server 9.6.2)
--
Fabien.