IF NOT EXISTS (SELECT 1 FROM KSQL_USERCOLUMNS WHERE KSQL_COL_TABNAME = 'T_AR_FINARBILL_E' AND KSQL_COL_NAME ='FWRITEBACKBILL')
 ALTER TABLE T_AR_FINARBILL_E ADD (FWRITEBACKBILL CHAR(1) DEFAULT '0' NOT NULL );