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v4.5
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    v4.5

      Fonctions de Chemin

      Exemple de Graph

      Les exemples suivants s'exécutent sur ce graph :

      path_length()

      Retourne le nombre de edges dans un path.

      Syntaxe path_length(<pathVar>)
      Arguments Nom Type Description
      <pathVar> PATH Référence de variable de path
      Type de Retour UINT

      MATCH p = ()->{1,3}()
      RETURN p, PATH_LENGTH(p) AS length
      

      Résultat :

      p
      length
      (:Paper {
      _id: "P1", score: 6, title: "Efficient Graph Search", author: "Alex"})-[:Cites {weight: 2}]->(:Paper {
      _id: "P2", score: 9, title: "Optimizing Queries", author: "Alex"})-[:Cites {weight: 1]->(:Paper {
      _id: "P3", score: 7, title: "Path Patterns", author: "Zack"}) 2
      (:Paper {
      _id: "P1", score: 6, title: "Efficient Graph Search", author: "Alex"})-[:Cites {weight: 2]->(:Paper {
      _id: "P2", score: 9, title: "Optimizing Queries", author: "Alex"}) 1
      (:Paper {
      _id: "P2", score: 9, title: "Optimizing Queries", author: "Alex"})-[:Cites {weight: 1]->(:Paper {
      _id: "P3", score: 7, title: "Path Patterns", author: "Zack"}) 1

      pedges()

      Collecte les edges dans un path dans une liste.

      Syntaxe pedges(<pathVar>)
      Arguments Nom Type Description
      <pathVar> PATH Référence de variable de path
      Type de Retour LIST

      MATCH p = ({_id: "P1"})-[]->{1,2}()
      RETURN pedges(p)
      

      Résultat :

      pedges(p)
      [{"from":"P1","to":"P2","uuid":"1","from_uuid":"8791028671650463745","to_uuid":"8718971077612535810","schema":"Cites","values":{"weight":2}}]
      [{"from":"P1","to":"P2","uuid":"1","from_uuid":"8791028671650463745","to_uuid":"8718971077612535810","schema":"Cites","values":{"weight":2}},{"from":"P2","to":"P3","uuid":"2","from_uuid":"8718971077612535810","to_uuid":"12033620403357220867","schema":"Cites","values":{"weight":1}}]

      pnodes()

      Collecte les nodes dans un path dans une liste.

      Syntaxe pnodes(<pathVar>)
      Arguments Nom Type Description
      <pathVar> PATH Référence de variable de path
      Type de Retour LIST

      MATCH p = ({_id: "P1"})-[]->{1,2}()
      RETURN pnodes(p)
      

      Résultat :

      pnodes(p)
      [{"id":"P1","uuid":"8791028671650463745","schema":"Paper","values":{"author":"Alex","title":"Efficient Graph Search","score":6}},{"id":"P2","uuid":"8718971077612535810","schema":"Paper","values":{"author":"Alex","title":"Optimizing Queries","score":9}}]
      [{"id":"P1","uuid":"8791028671650463745","schema":"Paper","values":{"author":"Alex","title":"Efficient Graph Search","score":6}},{"id":"P2","uuid":"8718971077612535810","schema":"Paper","values":{"author":"Alex","title":"Optimizing Queries","score":9}},{"id":"P3","uuid":"12033620403357220867","schema":"Paper","values":{"author":"Zack","title":"Path Patterns","score":7}}]
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