Re: Plperl functions with OUT parameters crashing each other when used in the same connection

pgsql-general-owner(at)postgresql(dot)org wrote:

> Tom Lane wrote:
>> "Philippe Lang" <philippe(dot)lang(at)attiksystem(dot)ch> writes:
>>> Here is a reduced example that shows the problem.
>>
>> Hm, I'm no Perl guru, but isn't the second script to be loaded going
>> to redefine those subroutines that the first script defined? I'm
>> pretty sure that there's not an implicit independent namespace for
>> each plperl function.
>>
>> regards, tom lane
>
> Hi Tom,
>
> I'm using PGSQL 8.1.4.
>
> I have deleted the subroutines now, but problem remains. Does
> that mean the variables created inside a plperl function are
> alive for the duration of the database connection?

It seems to be the case: if I rename all the variables in foo2 function, I do not have anymore problems.

Is there a way to "flush" all the variables explicitely?

------------------------------------------------------------
-- FUNCTION: foo1
------------------------------------------------------------
CREATE OR REPLACE FUNCTION public.foo1
(
IN a integer,
IN b integer,
OUT c integer,
OUT d integer
)
RETURNS SETOF record
AS

$$

@i = ('a', 'b');
@io = ();
@o = ('c', 'd');

$c = 0;
foreach $i (@i) {$input{$i} = @_[$c++]};
foreach $io (@io) {$input{$io} = @_[$c]; $output{$io} = @_[$c++]};
foreach $o (@o) {$output{$o} = @_[$c++]};

$output{'c'} = $input{'a'} + $input{'b'};
$output{'d'} = $input{'a'} * $input{'b'};

return_next \%output;

return undef;

$$

LANGUAGE 'plperl' VOLATILE;

------------------------------------------------------------
-- FUNCTION: foo2
------------------------------------------------------------
CREATE OR REPLACE FUNCTION public.foo2
(
IN n varchar(50),
IN m varchar(50),
OUT r integer,
OUT s varchar(50)
)
RETURNS SETOF record
AS

$$

@i2 = ('n', 'm');
@io2 = ();
@o2 = ('r', 's');

$c2 = 0;
foreach $i2 (@i2) {$input2{$i2} = @_[$c2++]};
foreach $io2 (@io2) {$input2{$io2} = @_[$c2]; $output2{$io2} = @_[$c2++]};
foreach $o2 (@o2) {$output2{$o2} = @_[$c2++]};

$output2{'r'} = $input2{'n'} + $input2{'m'};
$output2{'s'} = $input2{'n'} * $input2{'m'};

return_next \%output2;

return undef;

$$

LANGUAGE 'plperl' VOLATILE;

---------------
Philippe Lang
Attik System