Hello, recently I've been trying to write a plperlu function like this: CREATE FUNCTION foo RETURNS bytea AS ' use Storable qw(freeze thaw); my @a = (1,2,3,4,5); return freeze ([EMAIL PROTECTED]); ' LANGUAGE plperlu;
In other words, serialize some data (maybe some rows, would be a great aggregate function :)) and store it in some table. And I also wrote similar function which thaws the data from bytea argument. PostgreSQL however seems to be doing two things: 1) when returning any data from function (including bytea return type), it copies it up to first '\0' character. Looking at the plperl.c sources, solution would be changing lines like this: result = FunctionCall3(&prodesc->result_in_func, PointerGetDatum(SvPV(*svp, PL_na)), ObjectIdGetDatum(prodesc->result_typioparam), Int32GetDatum(-1)); into something like this: size_t ret_length; /* size_t? */ (...) result = FunctionCall3(&prodesc->result_in_func, PointerGetDatum(SvPV(*svp, ret_length)), ObjectIdGetDatum(prodesc->result_typioparam), Int32GetDatum(-1)); In other words, use the fact that SvPV's second argument is used to pass string length ... but I don't know where to pass the returned length. I don't suppose (-1) is the right place... 2) When function receives bytea as an argument it converts it into \NNN-escaped string. I think it would be more natural to pass unescaped string to a perl function. Ah, and while we are at it -- I think it could be nice to embed Storable module (functions freeze, nfreeze and thaw) into plperl -- ability to pass "raw serialized" perl data between functions, and store it in tables could be quite useful. Regards, Dawid ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings