insert into t_ec_syncmaterial select * from t_ec_syncmaterial as of timestamp to_timestamp('2015-04-30 15:00:00','yyyy-mm-dd hh24:mi:ss');
insert into t_ec_syncmaterial select * from t_ec_syncmaterial as of timestamp to_timestamp('2015-04-30 15:00:00','yyyy-mm-dd hh24:mi:ss');
