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v4.0
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    v4.0

      Subgraph Template

      Command, parameters

      Subgraph template query is a filtering and querying against a subgraph that is made by multiple path templates. The relationship between the template paths is indicated by calling the custom alias defined in the previous template paths, such as paths intersect at a certain node, paths have common edges, and so on.

      Syntax:

      • Command: graph()
      • Parameter: Subgraph made by path templates (Note: Write in the command)
      • Statement Alias: Not supported

      Single Relational Alias

      Example: as the path structure shown in the graph below, find the customers who received transfer from Customer CU013 and CU016, return with all properties.

      graph([
        n({_id == "CU013"}).re().n({@card}).re({@transfer}).n({@card} as n).le().n({@customer} as c),
        n({_id == "CU016"}).re().n({@card}).re({@transfer}).n(n)
      ])
      return c{*}
      

      Analysis: this subraph uses Node Alias n to relate the two paths with each other.

      Multiple Relational Alias

      Example: as the path structure shown in the graph below, find the circular paths: 3 distinct customer's cards perform circular transfer in a single direction, return customers in group.

      graph([
        n({@customer} as A1).re().n({@card} as C1),
        n({@customer && _uuid < A1._uuid} as A2).re().n({@card} as C2),
        n({@customer && _uuid < A2._uuid} as A3).re().n({@card} as C3),
        n(C1).re().n(C2).re().n(C3).re().n(C1)
      ])
      return A1{*}, A2{*}, A3{*}
      

      Analysis: this subgraph uses Node Alias C1, C2, and C3, to relate 4 paths to each other.

      Example: as the path structure shown in the graph below, find bank card information when 2 distinct cards uses the same email addresses, phone numbers, devices, return with all properties.

      graph([
        n({@card} as C1).e().n({@email}).e().n({@card && _uuid > C1._uuid} as C2),
        n(C1 as C11).e().n({@phone}).e().n(C2 as C22),
        n(C11).e().n({@device}).e().n(C22)
      ])
      return table(C11._id, C22._id)
      

      Analysis: the subgraph uses Node Alias C1, C2 to relate 3 paths to each other. If an alias is to be referenced for multiple times, it needs to be redefined each time after it is referenced: C1 is redefined as C11, C2 as C22 in the example above.

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