class Forty::Privilege::Table

www.postgresql.org/docs/9.6/static/sql-grant.html

      r -- SELECT ("read")
      w -- UPDATE ("write")
      a -- INSERT ("append")
      d -- DELETE
      D -- TRUNCATE
      x -- REFERENCES
      t -- TRIGGER
      X -- EXECUTE
      U -- USAGE
      C -- CREATE
      c -- CONNECT
      T -- TEMPORARY
arwdDxt -- ALL PRIVILEGES (for tables, varies for other objects)
      * -- grant option for preceding privilege

  /yyyy -- role that granted this privilege

Constants

ALL
DELETE
EXECUTE
INSERT
REFERENCES
SELECT
TRIGGER
TRUNCATE
UPDATE