-- 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
CONTEXT:  PL/Perl function "perl_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');
WARNING:  implicit elog via warn at line 4.
CONTEXT:  PL/Perl function "perl_warn"
 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';

$$;
ERROR:  Global symbol "$global" requires explicit package name at line 3.
Global symbol "$other_global" requires explicit package name at line 4.
CONTEXT:  compilation of PL/Perl function "uses_global"
select uses_global();
ERROR:  function uses_global() does not exist
LINE 1: select uses_global();
               ^
HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
SET plperl.use_strict = false;
create or replace function uses_global() returns text language plperl as $$

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

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

-- make sure we don't choke on readonly values
do language plperl $$ elog(NOTICE, ${^TAINT}); $$;
NOTICE:  0
CONTEXT:  PL/Perl anonymous code block
-- test recovery after "die"
create or replace function just_die() returns void language plperl AS $$
die "just die";
$$;
select just_die();
ERROR:  just die at line 2.
CONTEXT:  PL/Perl function "just_die"
create or replace function die_caller() returns int language plpgsql as $$
BEGIN
  BEGIN
    PERFORM just_die();
  EXCEPTION WHEN OTHERS THEN
    RAISE NOTICE 'caught die';
  END;
  RETURN 1;
END;
$$;
select die_caller();
NOTICE:  caught die
 die_caller 
------------
          1
(1 row)

create or replace function indirect_die_caller() returns int language plperl as $$
my $prepared = spi_prepare('SELECT die_caller() AS fx');
my $a = spi_exec_prepared($prepared)->{rows}->[0]->{fx};
my $b = spi_exec_prepared($prepared)->{rows}->[0]->{fx};
return $a + $b;
$$;
select indirect_die_caller();
NOTICE:  caught die
CONTEXT:  SQL statement "SELECT die_caller() AS fx"
PL/Perl function "indirect_die_caller"
NOTICE:  caught die
CONTEXT:  SQL statement "SELECT die_caller() AS fx"
PL/Perl function "indirect_die_caller"
 indirect_die_caller 
---------------------
                   2
(1 row)