IF EXISTS(SELECT 1 FROM SYS.COLUMNS  WHERE NAME = 'CD_USU_LIB_FOR_BLQ'  AND OBJECT_ID = OBJECT_ID('EST_NF_ENT_DANFE_PROVISORIO_CHECKIN_ENTRADA'))
BEGIN
       ALTER TABLE EST_NF_ENT_DANFE_PROVISORIO_CHECKIN_ENTRADA ALTER COLUMN CD_USU_LIB_FOR_BLQ INT;
END;