Pegar valor de uma variável no Sql Server

SET NOCOUNT ON;

	Declare 
	@QueryString as NVarchar(4000), @Datazero as varchar(20),  @Datamn as varchar(20),
	@CdUsuario as integer,
	@SitProcesso as int
   ,@DsUsuarioRede varchar(20)
   ,@Processo as int
   ,@Grupo as int
   ,@Cota as smallint
   ,@DtCriacao as varchar(20)
		   
SET @CdUsuario = (SELECT CdUsuario FROM Seguranca.TBUsuario WHERE DsUsuarioRede = @DsUsuarioRede)
SET @Processo = 46

    -- Lista os processos baseado em filtros
	Set @QueryString = N'
SELECT 
			CP.CdProcesso, 
			CP.DtCriacao, 
			(select TA.DtInicio 
			   from Processo.TBAnalise TA 
			  where TA.CdProcesso = CP.CdProcesso 
			    and TA.CdAnalise = (select max(TBA.CdAnalise) 
				                      from Processo.TBAnalise TBA 
									 where TBA.CdProcesso = TA.CdProcesso)) DtInicio,
            (select TA.DtFim 
			   from Processo.TBAnalise TA 
			  where TA.CdProcesso = CP.CdProcesso 
			    and TA.CdAnalise = (select max(TBA.CdAnalise) 
				                      from Processo.TBAnalise TBA 
									 where TBA.CdProcesso = TA.CdProcesso)) DtFim,
			CP.CdGrupo, 
			CP.CdCota, 
			ISNULL(AWF.NmWorkFlowItem, ''Processo Iniciado - PV'') NmWorkFlowItem, 
			AWF.CdWorkFlowItem, 
			DTS.NmTipoStatus, 
			WFR.CdUsuario, 
			CASE WHEN (select max(TBA.CdAnalise) 
			             from Processo.TBAnalise TBA 
						where TBA.CdProcesso = CP.CdProcesso) IS NULL AND AWF.CdTipoUsuario != 3 THEN ''AGUARDANDO ANÁLISE'' 
                 ELSE (CASE WHEN  (select max(TBA.CdAnalise) 
				                     from Processo.TBAnalise TBA 
								    where TBA.CdProcesso = CP.CdProcesso) IS NULL AND AWF.CdTipoUsuario = 3 THEN ''PONTO DE VENDA'' 
                 ELSE ISNULL((select TBU.NmUsuario 
				                from Processo.TBAnalise TA, 
								     Seguranca.TBUsuario TBU 
							   where TA.CdProcesso = CP.CdProcesso   
							     and TA.CdAnalise = (select max(TBA.CdAnalise) 
								                       from Processo.TBAnalise TBA 
													  where TBA.CdProcesso = TA.CdProcesso) 
								 and TA.CdUsuario = TBU.CdUsuario), TBUP.NmUsuario)END)END NomeUsuario,
            AWF.CdTipoUsuario,
			(select max(TBA.CdAnalise) from Processo.TBAnalise TBA where  TBA.CdProcesso = CP.CdProcesso) CdAnalise,
			(select TA.CdUsuario from Processo.TBAnalise TA where TA.CdProcesso = CP.CdProcesso and TA.CdAnalise = (select max(TBA.CdAnalise) from Processo.TBAnalise TBA where  TBA.CdProcesso = TA.CdProcesso)) CdUsuarioAn,
			CASE 
				WHEN isnull((select TA.IcPriorizado from Processo.TBAnalise TA where TA.CdProcesso = CP.CdProcesso and TA.CdAnalise = (select max(TBA.CdAnalise) from Processo.TBAnalise TBA where  TBA.CdProcesso = TA.CdProcesso)),0) = 0 THEN
					null
				ELSE
					''checked''
				END IcPriorizado
		FROM 
			Processo.TBProcesso AS CP 
				INNER JOIN Dominios.TBTipoProcesso AS TP 
					ON CP.CdTipoProcesso = TP.CdTipoProcesso 
				INNER JOIN Processo.TBWorkFlowRealizacao AS WFR 
					ON CP.CdProcesso = WFR.CdProcesso 
					LEFT JOIN Seguranca.TBUsuario TBUP
						ON WFR.CdUsuario = TBUP.CdUsuario
				INNER JOIN Dominios.TBTipoStatus AS DTS 
					ON CP.CdTipoStatus = DTS.CdTipoStatus 
				LEFT OUTER JOIN Processo.TBWorkFlowAtividade AS AWF 
					ON WFR.CdWorkFlowItem = AWF.CdWorkFlowItem  				
		WHERE 
			WFR.DtCriacao = 
			(
				SELECT MAX(DtCriacao) 
				FROM Processo.TBWorkFlowRealizacao 
				WHERE CdProcesso = CP.CdProcesso
			)
		AND Exists((select 1 
		    from ScoCons..Cota as cota, 
				 Seguranca.TBGrupoUsuario as gpusu
		    where CP.CdGrupo = cota.Grupo
		    and CP.CdCotaMPS = cota.Cod
		    and gpusu.CdGrupo = cota.Conces
		    and gpusu.CdUsuario = ' + Cast(@CdUsuario as varchar) + ')) ' 
					 
	IF @Processo IS NOT NULL
		BEGIN
			SET @QueryString = @QueryString + ' AND CP.CdProcesso = ' + Cast(@Processo as varchar)
		END

	IF @Grupo IS NOT NULL
		BEGIN
			SET @QueryString = @QueryString + ' AND CP.CdGrupo = ' + Cast(@Grupo as varchar)
			
		END

	IF @Cota IS NOT NULL
		BEGIN
			SET @QueryString = @QueryString + ' AND CP.CdCota = ' + Cast(@Cota as varchar)
		END
	
	IF @SitProcesso IS NOT NULL
		BEGIN
			SET @QueryString = @QueryString + ' AND CP.CdTipoStatus = ' + Cast(@SitProcesso as varchar)
		END

--	IF @CdUsuario IS NOT NULL 
--		BEGIN
--			SET @QueryString = @QueryString + ' AND WFR.CdUsuario = ' + Cast(@CdUsuario as varchar)
--		END

	IF @DtCriacao IS NOT NULL
		BEGIN
			set @Datazero	= LEFT(@DtCriacao, 4) + '/' + SUBSTRING(@DtCriacao, 6, 2) + '/' + SUBSTRING(@DtCriacao, 9, 2) + ' 00:00:00' 
			set @Datamn		= LEFT(@DtCriacao, 4) + '/' + SUBSTRING(@DtCriacao, 6, 2) + '/' + SUBSTRING(@DtCriacao, 9, 2) + ' 23:59:59'
			SET @QueryString = @QueryString + ' AND CP.DtCriacao >= ''' + @Datazero + ''' AND CP.DtCriacao <= ''' + @Datamn + ''''  
		END
		
		SET @QueryString = @QueryString + ' ORDER BY CP.CdProcesso'
								
		--EXEC sp_executesql @QueryString 
		print @QueryString