Binary package “postgresql-plperl-11” in ubuntu disco

PL/Perl procedural language for PostgreSQL 11

 PL/Perl enables an SQL developer to write procedural language functions
 for PostgreSQL 11 in Perl. You need this package if you have any
 PostgreSQL 11 functions that use the languages plperl or plperlu.
 .
 PostgreSQL is an object-relational SQL database management system.