Cast functions
A cast performs a conversion between two data types.
The database server allows you to write your own cast functions to
perform casts. The following topics summarize how you can extend a
cast function for built-in and UDTs. For more information about how
to extend casts, refer to Create user-defined casts.
Tip: If a DataBlade® module
defines a data type, it might also provide cast functions between
this data type and other data types in the database. For more information
about functions that a specific DataBlade module
provides, refer to the user guide for that DataBlade module.