template1=# create extension plpythonu; ERROR: could not open extension control file "/usr/pgsql-9.1/share/extension/plpythonu.control": No such file or directory
The package is installed: postgresql91-plpython.x86_64 9.1.3-1PGDG.rhel6 @pgdg91
# ll /usr/pgsql-9.1/share/extension/ total 12 -rw-r--r--. 1 root root 332 Feb 25 00:15 plpgsql--1.0.sql -rw-r--r--. 1 root root 179 Feb 25 00:15 plpgsql.control -rw-r--r--. 1 root root 381 Feb 25 00:15 plpgsql--unpackaged--1.0.sql