Retour de MV_LIEN qui avait disparue alors qu'(lle est encore utile

SELECT

  nsup.id noeud_sup_id,

  lsup.id lien_sup_id,

  nl.id noeud_liste_id,

  linf.id lien_inf_id,

  ninf.id noeud_inf_id,

  nsup.etape_id etape_id,

  ninf.element_pedagogique_id element_pedagogique_id

FROM

  noeud nsup

  JOIN lien lsup ON lsup.histo_destruction IS NULL AND lsup.noeud_sup_id = nsup.id

  JOIN noeud nl ON nl.histo_destruction IS NULL AND nl.liste = 1 AND nl.id = lsup.noeud_inf_id

  JOIN lien linf ON linf.histo_destruction IS NULL AND linf.noeud_sup_id = nl.id

  JOIN noeud ninf ON ninf.histo_destruction IS NULL AND ninf.id = linf.noeud_inf_id AND ninf.liste = 0

WHERE

  nsup.histo_destruction IS NULL

  AND nsup.liste = 0

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