Re: dblink_exec: can it perform a remote function?

Oh, I just noticed, I forgot to post the error message of the second
try. This one, I can understand.
psql:test_02.sql:21: ERROR:  statement returning results not allowed
CONTEXT:  SQL statement "SELECT dblink_exec('pragma','select
WARN(P_MESSAGE := ''Raise dblink test'');')"

On 22.03.2016 12:33, Thiemo Kellner wrote:
> Hi all
>
> I am trying to execute a function on a remote server using dblink to
> test stuff.
>
> My function is:
> create or replace function /*LOGGER.*/WARN(in P_MESSAGE text)
>     returns void as
> $warn$
> begin
>        raise debug     '%', P_MESSAGE;
>        raise log       '%', P_MESSAGE;
>        raise info      '%', P_MESSAGE;
>        raise notice    '%', P_MESSAGE;
>        raise warning   '%', P_MESSAGE;
> end;
> $warn$ language PLPGSQL;
>
> I try to execute it with:
> do language PLPGSQL
> $anonymous$
> begin
>        set session client_min_messages to log;
>        perform dblink_connect_u('pragma','dbname=thiemo password=XXX');
>        perform dblink_exec('pragma','perform WARN(P_MESSAGE := ''Raise
> dblink test'');');
>        perform dblink_exec('pragma','commit;');
>        perform dblink_disconnect('pragma');
> end;
> $anonymous$
>
> I get the error:
> psql:test_02.sql:22: ERROR:  syntax error at or near "perform"
> CONTEXT:  Error occurred on dblink connection named "pragma": could not
> execute command.
> SQL statement "SELECT dblink_exec('pragma','perform WARN(P_MESSAGE :=
> ''Raise dblink test'');')"
> PL/pgSQL function inline_code_block line 12 at PERFORM
>
> If I try to execute it with:
> do language PLPGSQL
> $anonymous$
> begin
>        set session client_min_messages to log;
>        perform dblink_connect_u('pragma','dbname=thiemo password=XXX');
>        perform dblink_exec('pragma','select WARN(P_MESSAGE := ''Raise
> dblink test'');');
>        perform dblink_exec('pragma','commit;');
>        perform dblink_disconnect('pragma');
> end;
> $anonymous$
>
> Isn't it possible to execute funtions through dblink? Any hint is
> appreciated.
>
> Kind regards
>
> Thiemo
>
>
>
>

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