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v4.2
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中文EN
v4.2

    Subgraph Template

    A subgraph template graph([<path_template1>, <path_template2>, ...]) combines the filtering rules of multiple paths that intersect at nodes or share edges and form a subgraph. Subgraph template do not support statement alias.

    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 subgraph 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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