/usr/share/doc/postgresql-doc-9.6/contrib/README.pgc_casts is in postgresql-comparator 2.2.6-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | provide useful casts for pg_comparator:
- bytea to/from bit & varbit,
- bit & varbit to int2.
load with:
sh> psql < <path-to-postgresql>/share/contrib/pgc_casts.sql
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