if not exists(select 1 from syscolumns where id = object_id('EST_NF_ENT_DANFE_PROVISORIO_ITENS') and name = 'CD_PROD_FORN')
begin
ALTER TABLE dbo.EST_NF_ENT_DANFE_PROVISORIO_ITENS ADD
	CD_PROD_FORN VARCHAR(150) NULL

ALTER TABLE dbo.EST_NF_ENT_DANFE_PROVISORIO_ITENS ADD CONSTRAINT
	DF_EST_NF_ENT_DANFE_PROVISORIO_ITENS_CD_PROD_FORN DEFAULT '' FOR CD_PROD_FORN
end