Data type conversions involving UDTs require appropriate cast definitions for the UDTs. To define a cast for a UDT, use the CREATE CAST statement.
- UPDATE
- INSERT
- Passing arguments to stored procedures, external stored procedures, UDFs, and UDMs
- Specific system operators and functions identified in other sections of this document
Performing an implicit data type conversion requires that an appropriate cast definition exists that specifies the AS ASSIGNMENT clause.
If no UDT-to-TIME implicit cast definition exists, Vantage looks for a UDT-to-CHAR or UDT-to-VARCHAR cast definition that can substitute for the UDT-to-TIME implicit cast definition. Substitutions are valid because Analytics Database can use the implicit cast definition to cast the UDT to a character data type, and then implicitly cast the character data type to a DATE type. If multiple UDT-to-character implicit cast definitions exist, then Analytics Database returns an SQL error.