Log postgres query messages - windows

Question

How can I write the query result messages, which inform the user that the query was successful or not and the number of affected records, to log file in PostgreSQL.
I have tried to change log_statement to 'all' and log_min_duration_statement to 0 but all I get is the query text.
Is it possible to redirect those messages to log file in a Windows OS?

Answer 1

you can use GET DIAGNOSTICS for that.. And if you are a superuser, you can save result to a file...
create table tablename(version int);
insert into tablename select 9;
do
$$
declare
rc text;
begin
update tablename set version=version where false;
GET DIAGNOSTICS rc = ROW_COUNT;
raise info '%',' changed: '||rc;
update tablename set version=version where true;
GET DIAGNOSTICS rc = ROW_COUNT;
raise info '%',' changed: '||rc;
raise info '%','If you are superuser you can save result to a file...';
execute $e$copy(select '$e$||rc||$e$') to '/tmp/roes.log'$e$;
raise exception '%','raiseing error to rollback changes';
end;
$$
;
and the result looks:
INFO: changed: 0
INFO: changed: 1
INFO: If you are superuser you can save result to a file...
ERROR: raiseing error to rollback changes
********** Error **********
ERROR: raiseing error to rollback changes
SQL state: P0001