This method, overridden by the Null and NotNull Key mixins, tells if a column is allowed to be null with respect to the SQL schema.
This method, overridden by the Null and NotNull Key mixins, tells if a column is allowed to be null with respect to the SQL schema. Using the stackable trait pattern it's easier for the end DSL users to mentally map a Scala schema to an SQL schema with 0 effort and inversely, go from SQL to Morpheus DSL code.
A Boolean value.