Re: select version() with internal number version?

[Wèi Cōngruì]

SHOW server_version;
SHOW server_version_num;

I can fetch the version by these two statement.

On Thu, Aug 9, 2018 at 3:01 PM Luca Ferrari  wrote:

> HI all,
> I see a lot of external tools that do a 'SELECT version()' and then
> parse the output to get the version number (e.g., 10.4).
> My opinion is that this is not a good approach, since the output of
> version includes a lot of information and can mismatch a poorly
> written regular expression. It would be better to use pg_config
> --version, byt again there is the needing for mangling the data.
> Is there any way to get directly the PostgreSQL version number?
>
> Thanks,
> Luca
>
>

Re: [GENERAL] Reset Sequence number

[Wèi Cōngruì]

The 'SEQ' part can't be substituted by variable.
https://www.postgresql.org/docs/10/static/plpgsql-implementation.html

DO $$
 DECLARE
 SEQ BIGINT;
 BEGIN
  SEQ := (SELECT MAX(ID) FROM TABLE_1);
  EXECUTE format('ALTER SEQUENCE TABLE_1_SEQ RESTART WITH %s', SEQ);
 END
$$;

On Wed, Nov 22, 2017 at 6:26 PM, amul sul  wrote:

> Firstly, anonymous procedures are not supported in PostgreSQL, you need to
> embed this block in a plpgsql function[1] body & call that function if you
> want
> reset sequence value manually, or you could use CYCLE option[2] of a
> sequence to auto reset.
>
>
> 1] https://www.postgresql.org/docs/9.6/static/plpgsql-structure.html
> 2] https://www.postgresql.org/docs/devel/static/sql-createsequence.html
>
>
> Regards,
> Amul
>
> On Wed, Nov 22, 2017 at 3:06 PM, Brahmam Eswar 
> wrote:
> >
> > we are in process of migrating to postgres and need to reset the sequence
> > number with highest value of table key . I want to make it procedural to
> do
> > that as mentioned below,But it's throwing an error .
> >
> >
> >
> > DO $$
> >  DECLARE
> >  SEQ BIGINT;
> >  BEGIN
> >
> >   SEQ:=(SELECT MAX(ID) FROM TABLE_1);
> >   ALTER SEQUENCE TABLE_1_SEQ  RESTART WITH SEQ;
> >
> >  END$$;
> >
> > Error : syntax error at or near "SEQ"
> >
> > --
> > Thanks & Regards,
> > Brahmeswara Rao J.
>
>