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v4.2
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    中文EN
    v4.2

      Send UQL

      UQL()

      Method and class:

      UQL(uql string, config *configuration.RequestConfig) (*http.UQLResponse, error)
      

      Sending uql() request will return class UQLResponse.

      UQLResponse has below fileds:

      Field Type Description
      AliasList []string aliases of each return value
      DataItemMap Map[string]struct aliases and values (*DataItem) of each return value
      ExplainPlan *ExplainPlan UQL statement explanation tree
      Status *Status status of request execution
      Statistic *Statistic statistics of request execution, including timecost, metadata affected, etc.
      Reply *ultipa.UqlReply server reply
      Resp ultipa.UltipaRpcs_UqlClient GRPC stream

      UQLResponse has below methods:

      Method Type Description
      Get(index int) *DataItem acquire an alias as *DataItem by index
      Alias(alias string) *DataItem acquire an alias as *DataItem by name
      GetSingleTable() *structs.Table acquire the first alias (must be TABLE type) as *structs.Table

      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

      func TestMisc(t *testing.T) {
          // omit code of establishing server connection 'conn'
        
      	resp, _ := conn.UQL("return now() as currentTime, pi() as PI", nil)
      	attr, _ := resp.Get(0).AsAttr()
      	printers.PrintAttr(attr)
      }
      

      Output:

      +-------------------------+
      | currentTime             |
      +-------------------------+
      | 2022-12-17 07:17:39.886 |
      +-------------------------+
      

      Alias()

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

      func TestMisc(t *testing.T) {
          // omit code of establishing server connection 'conn'
        
      	resp, _ := conn.UQL("return now() as currentTime, pi() as PI", nil)
      	attr, _ := resp.Alias("PI").AsAttr()
      	printers.PrintAttr(attr)
      }
      

      Output:

      +------------------+
      | PI               |
      +------------------+
      | 3.14159265358979 |
      +------------------+
      

      GetSingleTable()

      Example: Send UQL uncollect [1,2,3] as number uncollect ["a", "b", "c"] as letter return table(number, letter) to server and print the table

      func TestMisc(t *testing.T) {
          // omit code of establishing server connection 'conn'
        
      	resp, _ := conn.UQL("uncollect [1,2,3] as number uncollect [\"a\", \"b\", \"c\"] as letter return table(number, letter)", nil)
      	table, _ := resp.GetSingleTable()
      	printers.PrintTable(table)
      }
      

      Output:

      +--------+--------+
      | number | letter |
      +--------+--------+
      |   1    |   a    |
      |   2    |   b    |
      |   3    |   c    |
      +--------+--------+
      
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