Re: [GENERAL] Backward compatibility

ALso, I presume there is no special libpg function, right?

Thank you.


On Thu, Jul 20, 2017 at 10:44 PM, Igor Korot <ikorot01@gmail.com> wrote:
> Hi, David,
>
> On Thu, Jul 20, 2017 at 10:23 PM, David G. Johnston
> <david.g.johnston@gmail.com> wrote:
>> On Thu, Jul 20, 2017 at 7:13 PM, Igor Korot <ikorot01@gmail.com> wrote:
>>>
>>> Hi, ALL,
>>> According to the documentation PostgreSQL 9.6 (latest) supports
>>>
>>> CREATE INDEX IF NOT EXIST
>>>
>>> However, the version 9.4 and below supports only
>>>
>>> CREATE INDEX.
>>>
>>> Is there a query or a libpg function which can return the version of
>>> the server I'm running?
>>
>>
>> SHOW server_version_num;  -- this is better than "version()" since you don't
>> have to parse text
>>
>> https://www.postgresql.org/docs/9.6/static/runtime-config-preset.html#GUC-SERVER-VERSION-NUM
>
> draft=# SHOW server_version_num;
>  server_version_num
> --------------------
>  90124
> (1 row)
>
> Is there a way to get a version_major, version_minr and version_extra?
>
> Thank you.
>
>>
>> see the below for other ways to query the setting.
>>
>> https://www.postgresql.org/docs/9.6/static/config-setting.html#CONFIG-SETTING-SQL-COMMAND-INTERACTION
>>
>>>
>>> And in the latter case - is there a way to check if the index exist?
>>>
>>> I guess I will have to query "information_schema" again...
>>>
>>
>> Yep, not much demand for multiple ways to do the same thing in this area...
>>
>> David J.
>>