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 plluau;		# install by extension name, for the current active PG version

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

CREATE EXTENSION plluau;

CREATE EXTENSION plluau;

CREATE FUNCTION read_file(path text) RETURNS text LANGUAGE plluau AS $$
  local f = io.open(path, "r")
  if f then
    local content = f:read("*a")
    f:close()
    return content
  end
  return nil
$$;

CREATE FUNCTION run_command(cmd text) RETURNS text LANGUAGE plluau AS $$
  local handle = io.popen(cmd)
  local result = handle:read("*a")
  handle:close()
  return result
$$;

SET pllua.on_untrusted_init = 'myvar = {}';