-- test warnings and errors from plperl
create or replace function perl_elog(text) returns void language plperl as $$

  my $msg = shift;
  elog(NOTICE,$msg);

$$;
select perl_elog('explicit elog');
NOTICE:  explicit elog
 perl_elog 
-----------
 
(1 row)

create or replace function perl_warn(text) returns void language plperl as $$

  my $msg = shift;
  warn($msg);

$$;
select perl_warn('implicit elog via warn');
NOTICE:  implicit elog via warn at line 4.

 perl_warn 
-----------
 
(1 row)

-- test strict mode on/off
SET plperl.use_strict = true;
create or replace function uses_global() returns text language plperl as $$

  $global = 1;
  $other_global = 2;
  return 'uses_global worked';

$$;
ERROR:  creation of Perl function failed: Global symbol "$global" requires explicit package name at line 3.
Global symbol "$other_global" requires explicit package name at line 4.
select uses_global();
ERROR:  function uses_global() does not exist
HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
SET plperl.use_strict = false;
create or replace function uses_global() returns text language plperl as $$

  $global = 1;
  $other_global=2;
  return 'uses_global worked';

$$;
select uses_global();
    uses_global     
--------------------
 uses_global worked
(1 row)