An older version of the documentation calls them the array containment operators: > The array containment operators (<@ and @>) [...] https://www.postgresql.

An older version of the documentation calls them the array containment operators: > The array containment operators (<@ and @>) [...] https://www.postgresql.org/docs/9.6/functions-array.html https://www.postgresql.org/docs/9.6/functions-array.html