ORA-40306: dm_nested types not supported by this algorithm
Cause: 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.
Action: Remove columns of these data types from the input data source.
ORA-40306错误是特定于Oracle数据管理器（DML）的错误，表明对对象的DML操作无效，因为不支持此处使用的算法。