drop table时报SQL0903N 错误

[p680:/db2home/db2inst1]db2 drop table PDW.T_DWU_ADDCUSTBILL_D_HIS;
DB21034E  The command was processed as an SQL statement because it was not a
valid Command Line Processor command.  During SQL processing it returned:
SQL0903N  COMMIT statement failed, transaction rolled back.  Reason code: "2".
SQLSTATE=40504
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