Bonjour,

je cherche à remplacer un EXISTS par autre chose notamment dans un soucis de performances mais je ne sais comment :

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AND	(
					EXISTS
					(SELECT 1
					FROM affair, doss, pfac_fele, unt_doss, pte_cmde,
					cmde, lieu, zon_geo
					WHERE	doss_codsit = ven_facture_fn.vfaf_codsit
					AND	doss_numdos = ven_facture_fn.vfaf_numdos
					AND	doss_tgm = ven_facture_fn.vfaf_tgm
					AND	pffe_numpeefacint = ven_facture_fn.vfaf_numpeefacint
					AND	udos_numintuntdos = pffe_numintuntdos
					AND	pcde_codoricde = udos_codoricde
					AND	pcde_numcde = udos_numcde
					AND	pcde_numptecde = udos_numptecde
					AND	cmde_codoricde = pcde_codoricde
					AND	cmde_numcde = pcde_numcde
					AND	lieu_codleu = doss_codpordch
					AND	zgeo_codzongeo = lieu_codzongeo
					AND 	affr_codsit = ven_facture_fn.vfaf_codsit
					AND	affr_codaff = @affaire
					AND	(affr_cdeusiexp = pcde_cdeusiexp OR affr_cdeusiexp IS NULL)
					AND	(affr_codporebq IN
										(SELECT 	voya_codporebq
										 FROM 	voyage
										 WHERE	voya_codsit = dossier.doss_codsit
										 AND		voya_numvyg = dossier.doss_numvyg
										) OR affr_codporebq IS NULL
							)
					AND	(affr_codpordch = doss.doss_codpordch OR affr_codpordch IS NULL)
					AND	(affr_codleudes = cmde_codleudes OR affr_codleudes IS NULL)
					AND	(affr_codclides = cmde_codclides OR affr_codclides IS NULL)
					AND	(affr_codclifac = pcde_codclifacman
							OR affr_codclifac = pcde_codclifacfet
							OR affr_codclifac = pcde_codclifacppt
							OR affr_codclifac = pcde_codclifacexp
							OR affr_codclifac = pcde_codclifactra
							OR affr_codclifac = pcde_codclifaccon
							OR affr_codclifac IS NULL
							)
					AND	(affr_codzongeo = zgeo_codzongeo OR affr_codzongeo IS NULL)
					AND	(affr_codcontinent = zgeo_codcontinent OR affr_codcontinent IS NULL)
					AND	(affr_codpay = lieu_codpay OR affr_codpay IS NULL)
			       )       )
Merci de votre aide