IF NOT EXISTS (SELECT 1 FROM KSQL_USERCOLUMNS WHERE KSQL_COL_TABNAME = 'T_ER_INVOICEMERGERULE' AND KSQL_COL_NAME ='FUDRDISPLAY') 
 ALTER TABLE T_ER_INVOICEMERGERULE ADD (FUDRDISPLAY NVARCHAR(2000) DEFAULT ' ' NOT NULL );