hstore_plluau

pig repo add pgsql -u   # add both repo and update cache

pig install pllua;		# install via package name, for the active PG version
pig install hstore_plluau;		# install by extension name, for the current active PG version

pig install hstore_plluau -v 18;   # install for PG 18
pig install hstore_plluau -v 17;   # install for PG 17
pig install hstore_plluau -v 16;   # install for PG 16
pig install hstore_plluau -v 15;   # install for PG 15
pig install hstore_plluau -v 14;   # install for PG 14

CREATE EXTENSION hstore_plluau CASCADE; -- requires hstore, plluau

CREATE EXTENSION hstore;
CREATE EXTENSION plluau;
CREATE EXTENSION hstore_plluau;

CREATE FUNCTION process_hstore(h hstore) RETURNS hstore LANGUAGE plluau AS $$
  -- h is a Lua table with string keys and string values
  h["processed"] = "true"
  -- Can also do unrestricted operations (file I/O, etc.)
  return h
$$;

SELECT process_hstore('key1 => "val1", key2 => "val2"'::hstore);