IF NOT EXISTS (SELECT * FROM SYS.COLUMNS WHERE NAME = 'BLQ_EST' AND OBJECT_ID = OBJECT_ID('EST_PED_CP_PENDENCIA_IMPLANTACAO'))
begin
ALTER TABLE dbo.EST_PED_CP_PENDENCIA_IMPLANTACAO ADD
	BLQ_EST int NOT NULL CONSTRAINT DF_EST_PED_CP_PENDENCIA_IMPLANTACAO_BLOQUEIO_EST DEFAULT 0
end