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v4.0
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中文EN
v4.0

    Find Edges

    Similar to node query, user can do edge query in a graph freely. By giving some filtering rules, user can acquire and assemble node data or aggregate the results.

    Syntax:

    • Command: find()
    • Parameter: (see the table below)
    • Statement Alias: Custom alias supported (by default it is edges), structure type is EDGE
    Parameter Type Specification Description Structure Type of Custom Alias
    edges() Filter Mandatory Filtering rules of edge Not supported

    Similar to node query, the default custom alias edges is automatically defined by system when there is no manually defined alias at the end of the edge query statement; in this case user can not use edges to define custom alias for other data in subsequent UQL statement, error of duplicated name will be triggered otherwise. If there is manually defined alias at the end of the edge query statement, it shall prevail.

    Unconditional

    Example: Find 10 edges, return all edge properties

    find().edges() as e
    limit 10
    return e{*}
    

    UUID

    Example: Find edges 1, 2, 3, return all edge properties

    find().edges([1,2,3]) as e
    return e{*}
    

    FROM

    Example: Find 10 edges from a node whose UUID is 1, return all edge properties

    find().edges({_from_uuid == 1}) as e
    limit 10
    return e{*}
    

    Example: Find 10 @transaction from Card CA001, return all edge properties

    find().edges({_from == "CA001"}) as e
    limit 10
    return e{*}
    

    TO

    Example: Find 10 edges to a node whose UUID is 1, return all edge properties

    find().edges({_to_uuid == 1}) as e
    limit 10
    return e{*}
    

    Example: Find 10 @transaction to Card CA001, return transaction number

    find().edges({_to == "CA001"}) as e
    limit 10
    return e{*}
    

    Schema

    Example: Find 10 @transfer, return all edge properties

    find().edges({@transfer}) as e
    limit 10
    return e{*}
    

    Property

    Example: Find 10 edges with their time greater than 2022-04-02 0:0:0, return all edge properties

    find().edges({time > "2022-04-02 0:0:0"}) as e
    limit 10
    return e{*}
    

    Schema & Property

    Example: Find 10 edges with their @transfer time greater than 2022-04-02 0:0:0, return all edge properties

    find().edges({@transfer.time > "2022-04-02 0:0:0"}) as e
    limit 10
    return e{*}
    

    Default Statement Alias

    Example: Find 10 edges, return all edge properties

    find().edges() as e
    limit 10
    return e{*}
    
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