IF NOT EXISTS (SELECT 1 FROM KSQL_USERCOLUMNS WHERE KSQL_COL_TABNAME = 'T_MSPLAN_JVWSCHEMSET' AND KSQL_COL_NAME ='FCOLUMNFLAG') 
 ALTER TABLE T_MSPLAN_JVWSCHEMSET ADD (FCOLUMNFLAG NVARCHAR(5) DEFAULT ' ' NOT NULL );