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v4.2
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中文EN
v4.2

    Send UQL

    uql()

    Method and class:

    Response uql(String uql)
    
    Response uql(String uql, RequestConfig requestConfig)
    

    Sending uql() request will return class Response.

    Response has below fileds:

    Field Type Description
    aliases List<Alias> aliases and types of each return value
    items Map<String, DataItem> aliases and values (DataItem) of each return value
    insertNodesReply Ultipa.InsertNodesReply result of batch insert of nodes
    insertEdgesReply Ultipa.InsertEdgesReply result of batch insert of edges
    exportData ExportData result of export data
    explainPlan ExplainPlan UQL statement explanation tree
    status UStatus status of request execution
    statistic Statistic statistics of request execution, including timecost, metadata affected, etc.

    Response has below methods:

    Method Type Description
    get(int index) DataItem acquire an alias as DataItem by index
    alias(String name) DataItem acquire an alias as DataItem by name

    Alias types such as NODE, EDGE and PATH can be connverted to corresponding classes using methods of class DataItem, see next chapter Alias Structs for detail.

    get()

    Example: Send UQL return now() as currentTime, pi() as PI to server and print the first alias in json format

    public class Main {
        public static void main(String[] args) {
            // omit code of establishing server connection 'conn'
    
            Response res = conn.uql("return now() as currentTime, pi() as PI");
            System.out.println(res.get(0).toJson());
        }
    }
    

    Output:

    ["{\"type\":\"DATETIME\",\"values\":[\"Dec 13, 2022 7:39:38 AM\"],\"name\":\"currentTime\"}"]
    

    alias()

    Example: Send UQL return now() as currentTime, pi() as PI to server and print the 2nd alias in json format

    public class Main {
        public static void main(String[] args) {
            // omit code of establishing server connection 'conn'
    
            Response res = conn.uql("return now() as currentTime, pi() as PI");
            System.out.println(res.alias("PI").toJson());
        }
    }
    

    Output:

    ["{\"type\":\"DOUBLE\",\"values\":[3.14159265358979],\"name\":\"PI\"}"]
    
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