[GENERAL] Problem with function invocation

[DaVinci]

 Hello.

 When I create next function:

        create function pilpot() returns integer as '
                declare
                        foo integer;
                begin
                        foo = insert into aviso(user) values(1);
                        return foo;
                end;
        ' language 'plpgsql';

 And try to invoque with:

        # select pilpot();

 I get next error:

        ERROR: parser: parse error at or near "("

 Where is the problem with this?

 Thanks a lot.

                                                                David

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