IF NOT EXISTS (SELECT 1 FROM KSQL_USERCOLUMNS WHERE KSQL_COL_TABNAME = 'T_SIM_ISOMERISM_BILL_INV' AND KSQL_COL_NAME ='FTOTALAMOUNT')
    ALTER TABLE T_SIM_ISOMERISM_BILL_INV ADD (FTOTALAMOUNT DECIMAL(23,10) DEFAULT 0 NOT NULL);