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v4.2
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中文EN
v4.2

    Find Nodes

    Statement find().nodes() can apply filters on nodes and return those that meet the requirement. This is very similar to table query in traditional database.

    Syntax:

    • Statement alias supported (NODE type)
    • Optional parameters:
    Parameter Type Specification Description Structure Type of Custom Alias
    limit() Int -1 or >=0 Number of results to return in single execution, -1 means to return all results Not supported

    An alias nodes will be automatically defined by system when there is no manually defined alias at the end of the node query statement; in this case user cannot use nodes to define alias for other data in the subsequent UQL statement, otherwise error of duplicated name will be triggered.

    Unconditional

    Example: Find 10 nodes, return all node properties

    find().nodes() as n
    limit 10
    return n{*}
    

    ID

    Example: Find nodes whose ID equals CA001, return all node properties

    find().nodes({_id == "CA001"}) 
    return nodes{*}
    

    UUID

    Example: Find cards 1, 2 and 3, return all node properties

    find().nodes([1,2,3]) as n
    return n{*}
    

    Schema

    Example: Find 10 @card, return all node properties

    find().nodes({@card}) as n
    limit 10
    return n{*}
    

    Property

    Example: Find 10 nodes at level 1 and above, return all node properties

    find().nodes({level > 1}) as n
    limit 10
    return n{*}
    

    Schema & Property

    Example: Find 10 @card at level 1 and above, return all node properties

    find().nodes({@card.level > 1}) as n
    limit 10
    return n{*}
    

    Default Statement Alias

    Example: Find 10 nodes, return all node properties

    find().nodes()
    limit 10
    return nodes{*}
    
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