IF NOT EXISTS (SELECT 1 FROM KSQL_USERCOLUMNS WHERE KSQL_COL_TABNAME = 'T_LOG_APP' AND KSQL_COL_NAME ='FMODIFYBILLNO') 
 ALTER TABLE T_LOG_APP ADD (FMODIFYBILLNO NVARCHAR(255) DEFAULT ' ' NOT NULL );
IF NOT EXISTS (SELECT 1 FROM KSQL_USERCOLUMNS WHERE KSQL_COL_TABNAME = 'T_LOG_ARCHIVE' AND KSQL_COL_NAME ='FMODIFYBILLNO') 
 ALTER TABLE T_LOG_ARCHIVE ADD (FMODIFYBILLNO NVARCHAR(255) DEFAULT ' ' NOT NULL );
