PLS Error Codes

ORDER methods must be declared with 1 (one) parameter in addition to (optional) SELF.

User Defined Constrained Subtypes are disallowed

MAP methods must return a scalar type.

A PLSQL Table may not contain a table or a record with composite fields

ORDER methods must return an INTEGER.

The expression in a RETURN statement cannot be a type

The parameter type in an ORDER method must be the containing object type.

Implementation Restriction : Pass a returned record to a temporary identifier before selecting a field

Within SQL statements- only equality comparisons of objects are allowed without a map or order function.

Float cannot have scale