ERROR [FileOperation] java.lang.ClassCastException: java.math.BigDecimal cannot be cast to java.lang.String

15:26:41,681 INFO  [DBOperationOfOracle] select table_name, tablespace_name, num_rows from all_tables where owner = 'CAFFM' and tablespace_name is NOT NULL union select distinct table_name,tablespace_name,num_rows from all_tab_partitions where table_owner = 'CAFFM'
15:26:41,946 INFO  [DBOperationOfOracle] select table_name, tablespace_name, num_rows from all_tables where owner = 'CAFFM' and tablespace_name is NOT NULL union select distinct table_name,tablespace_name,num_rows from all_tab_partitions where table_owner = 'CAFFM'
15:29:01,711 ERROR [FileOperation] java.lang.ClassCastException: java.math.BigDecimal cannot be cast to java.lang.String