How to fix the Oracle error ORA-40306: dm_nested types not supported by this algorithm?

In this post, you’ll learn more about the Oracle ErrorORA-40306: dm_nested types not supported by this algorithm with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-40306: dm_nested types not supported by this algorithm

Reason for the Error ORA-40306: dm_nested types not supported by this algorithm

The training input to the CREATE_MODEL routine contains one or more columns of dm_nested type (DM_NESTED_NUMERICALS and/or DM_NESTED_CATEGORICALS). These columns are currently not supported for Decision Tree, O-Cluster, and Adaptive Bayes Network algorithms.

How to fix the Error ORA-40306: dm_nested types not supported by this algorithm ?

You can fix this error in Oracle by following the below steps

Remove columns of these data types from the input data source.