This file is indexed.

/usr/share/postgres-xc/extension/plperl--1.0.sql is in postgres-xc-plperl 1.1-2ubuntu2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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/* src/pl/plperl/plperl--1.0.sql */

/*
 * Currently, all the interesting stuff is done by CREATE LANGUAGE.
 * Later we will probably "dumb down" that command and put more of the
 * knowledge into this script.
 */

CREATE PROCEDURAL LANGUAGE plperl;

COMMENT ON PROCEDURAL LANGUAGE plperl IS 'PL/Perl procedural language';