IF NOT EXISTS (SELECT 1 FROM KSQL_USERCOLUMNS WHERE KSQL_COL_TABNAME = 'T_SIM_ISOMERISM_BILL_DATA' AND KSQL_COL_NAME ='FBEGIN_DATE')
    ALTER TABLE T_SIM_ISOMERISM_BILL_DATA ADD (FBEGIN_DATE DATETIME);
	

IF NOT EXISTS (SELECT 1 FROM KSQL_USERCOLUMNS WHERE KSQL_COL_TABNAME = 'T_SIM_ISOMERISM_BILL_DATA' AND KSQL_COL_NAME ='FEND_DATE')
    ALTER TABLE T_SIM_ISOMERISM_BILL_DATA ADD (FEND_DATE DATETIME);