ORA-60308
mismatched data type descriptor from opaque object instance
Cause
The data type descriptor returned by the ODCITableFetch interface inside an ANYDATA or ANYDATASET instance did not match the output data type described by the ODCITableDescribe interface.
Action
Verify the implementation of the ODCITableFetch and ODCITableDescribe interfaces and ensure the output data type is consistent during the describe phase and the fetch phase.