IF NOT EXISTS (SELECT 1 FROM KSQL_USERCOLUMNS WHERE KSQL_COL_TABNAME = 'T_RIM_INV_AIR_ELE' AND KSQL_COL_NAME ='FSEAT_GRADE_NAME')
 ALTER TABLE T_RIM_INV_AIR_ELE ADD (FSEAT_GRADE_NAME NVARCHAR(50) DEFAULT ' ' NOT NULL );