This section introduces methods on a Connection object for inserting nodes and edges to the graph or deleting nodes and edges from the graphset.

Each example focuses solely on the method's usage. For a complete code example, please refer to the full example.

Example Graph Data Model

The examples below demonstrate how to insert or delete nodes or edges from a graphset with the following schema and property definitions:

Property Type Mapping

When inserting nodes or edges, you may need to specify property values of different types. The mapping between Ultipa property types and Go/Driver data types is as follows:

Insertion

InsertNodes()

Inserts new nodes of a schema to the current graph.

Parameters:

• string: Name of the schema.
• []Node: The list of Node objects to be inserted.
• InsertRequestConfig (Optional): Configuration settings for the request. If nil is provided, the function will use default configuration settings.

Returns:

• Response: Result of the request. The Response object contains an alias nodes that holds all the inserted nodes when InsertRequestConfig.Slient is set to true.
• error: An error object containing details about any issues that occurred. nil is returned if the operation is successful.

// Inserts two nodes into schema 'user' in graphset 'lcc', prints error code and information of the inserted nodes

requestConfig := &configuration.RequestConfig{
  UseMaster: true,
  GraphName: "lcc",
}

// There is no alias in Response if InsertRequestConfig.Slient is false
insertRequestConfig := &configuration.InsertRequestConfig{
  RequestConfig: requestConfig,
  InsertType:    ultipa.InsertType_NORMAL,
  Silent:        true,
}

var nodes []*structs.Node
node1 := structs.NewNode()
node1.UUID = 1
node1.ID = "U001"
node1.Set("name", "Alice")
node1.Set("age", 18)
node1.Set("score", 65.32)
node1.Set("birthday", "1993-5-4")
node1.Set("location", "point(23.63 104.25)")
node1.Set("profile", "abc")
node1.Set("interests", []string{"tennis", "violin"})
node1.Set("permissionCodes", []int32{2004, 3025, 1025})
node2 := structs.NewNode()
node2.UUID = 2
node2.ID = "U002"
node2.Set("name", "Bob")
nodes = append(nodes, node1, node2)
myInsert, _ := conn.InsertNodes("user", nodes, insertRequestConfig)

println("Operation succeeds:", myInsert.Status.IsSuccess())
nodeList, schemaList, _ := myInsert.Alias("nodes").AsNodes()
printers.PrintNodes(nodeList, schemaList)

Operation succeeds: true
+------+------+--------+-------+-------+---------------+--------------------------+-----------------------------+------------+-----------------+------------------+
|  ID  | UUID | Schema | name  |  age  |     score     |         birthday         |          location           |  profile   |    interests    | permissionCodes  |
+------+------+--------+-------+-------+---------------+--------------------------+-----------------------------+------------+-----------------+------------------+
| U001 |  1   |  user  | Alice |  18   | 65.3200000000 | 1993-05-04T00:00:00.000Z | POINT(23.630000 104.250000) | [97 98 99] | [tennis violin] | [2004 3025 1025] |
| U002 |  2   |  user  |  Bob  | <nil> |     <nil>     |          <nil>           |            <nil>            |   <nil>    |      <nil>      |      <nil>       |
+------+------+--------+-------+-------+---------------+--------------------------+-----------------------------+------------+-----------------+------------------+

InsertEdges()

Inserts new edges of a schema to the current graph.

Parameters:

• string: Name of the schema.
• []Edge: The list of Edge objects to be inserted.
• InsertRequestConfig (Optional): Configuration settings for the request. If nil is provided, the function will use default configuration settings.

Returns:

• Response: Result of the request. The Response object contains an alias edges that holds all the inserted edges when InsertRequestConfig.Slient is set to true.
• error: An error object containing details about any issues that occurred. nil is returned if the operation is successful.

// Inserts two edges into schema 'follows' in graphset 'lcc', prints error code and information of the inserted edges
requestConfig := &configuration.RequestConfig{
  UseMaster: true,
  GraphName: "lcc",
}

// There is no alias in Response if InsertRequestConfig.Slient is false
insertRequestConfig := &configuration.InsertRequestConfig{
  RequestConfig: requestConfig,
  InsertType:    ultipa.InsertType_NORMAL,
  Silent:        true,
}

var edges []*structs.Edge
edge1 := structs.NewEdge()
edge1.UUID = 1
edge1.From = "U001"
edge1.To = "U002"
edge1.Set("createdOn", "2024-5-6")
edge2 := structs.NewEdge()
edge2.UUID = 2
edge2.From = "U002"
edge2.To = "U001"
edge2.Set("createdOn", "2024-5-8")
edges = append(edges, edge1, edge2)

myInsert, err := conn.InsertEdges("follows", edges, insertRequestConfig)
if err != nil {
  println(err)
}
println("Operation succeeds:", myInsert.Status.IsSuccess())
edgeList, schemaList, _ := myInsert.Alias("edges").AsEdges()
printers.PrintEdges(edgeList, schemaList)

Operation succeeds: true
+------+-----------+------+---------+------+---------+-------------------------------+
| UUID | FROM_UUID | FROM | TO_UUID |  TO  | SCHEMA  |           createdOn           |
+------+-----------+------+---------+------+---------+-------------------------------+
|  1   |     1     | U001 |    2    | U002 | follows | 2024-05-06T00:00:00.000+08:00 |
|  2   |     2     | U002 |    1    | U001 | follows | 2024-05-08T00:00:00.000+08:00 |
+------+-----------+------+---------+------+---------+-------------------------------+

InsertNodesBatchBySchema()

Inserts new nodes of a schema into the current graph through gRPC. The properties within the node values must be consistent with those declared in the schema structure.

Parameters:

• Schema: The target schema.
• []Node: The list of Node objects to be inserted.
• InsertRequestConfig (Optional): Configuration settings for the request. If nil is provided, the function will use default configuration settings.

Returns:

• InsertResponse: Result of the request.
• error: An error object containing details about any issues that occurred. nil is returned if the operation is successful.

// Inserts two nodes into schema 'user' in graphset 'lcc' and prints error code 
requestConfig := &configuration.RequestConfig{
  UseMaster: true,
  GraphName: "lcc",
}

insertRequestConfig := &configuration.InsertRequestConfig{
  RequestConfig: requestConfig,
  InsertType:    ultipa.InsertType_OVERWRITE,
}

schema := structs.NewSchema("user")
schema.Properties = append(schema.Properties, &structs.Property{
  Name: "name",
  Type: ultipa.PropertyType_STRING,
}, &structs.Property{
  Name: "age",
  Type: ultipa.PropertyType_INT32,
}, &structs.Property{
  Name: "score",
  Type: ultipa.PropertyType_DECIMAL,
}, &structs.Property{
  Name: "birthday",
  Type: ultipa.PropertyType_DATETIME,
}, &structs.Property{
  Name: "location",
  Type: ultipa.PropertyType_POINT,
}, &structs.Property{
  Name: "profile",
  Type: ultipa.PropertyType_BLOB,
}, &structs.Property{
  Name:     "interests",
  Type:     ultipa.PropertyType_LIST,
  SubTypes: []ultipa.PropertyType{ultipa.PropertyType_STRING},
}, &structs.Property{
  Name:     "permissionCodes",
  Type:     ultipa.PropertyType_SET,
  SubTypes: []ultipa.PropertyType{ultipa.PropertyType_INT32},
})

var nodes []*structs.Node
node1 := structs.NewNode()
node1.UUID = 1
node1.ID = "U001"
node1.Set("name", "Alice")
node1.Set("age", 18)
node1.Set("score", 65.32)
node1.Set("birthday", "1993-5-4")
node1.Set("location", "point(23.63 104.25)")
node1.Set("profile", "abc")
node1.Set("interests", []string{"tennis", "violin"})
node1.Set("permissionCodes", []int32{2004, 3025, 1025})

node2 := structs.NewNode()
node2.UUID = 2
node2.ID = "U002"
node2.Set("name", "Bob")
node2.Set("age", nil)
node2.Set("score", nil)
node2.Set("birthday", nil)
node2.Set("location", nil)
node2.Set("profile", nil)
node2.Set("interests", nil)
node2.Set("permissionCodes", nil)
nodes = append(nodes, node1, node2)

myInsert, err := conn.InsertNodesBatchBySchema(schema, nodes, insertRequestConfig)
if err != nil {
  println(err)
}
println("Operation succeeds:", myInsert.Status.IsSuccess())

Operation succeeds: true

InsertEdgesBatchBySchema()

Inserts new edges of a schema into the current graph through gRPC. The properties within the edge values must be consistent with those declared in the schema structure.

Parameters:

• Schema: The target schema.
• []Edge: The list of Edge objects to be inserted.
• InsertRequestConfig (Optional): Configuration settings for the request. If nil is provided, the function will use default configuration settings.

Returns:

• InsertResponse: Result of the request.
• error: An error object containing details about any issues that occurred. nil is returned if the operation is successful.

// Inserts two edges into schema 'follows' in graphset 'lcc' and prints error code

requestConfig := &configuration.RequestConfig{
  UseMaster: true,
  GraphName: "lcc",
}

insertRequestConfig := &configuration.InsertRequestConfig{
  RequestConfig: requestConfig,
  InsertType:    ultipa.InsertType_OVERWRITE,
}

schema := structs.NewSchema("follows")
schema.Properties = append(schema.Properties, &structs.Property{
  Name: "createdOn",
  Type: ultipa.PropertyType_TIMESTAMP,
})

var edges []*structs.Edge
edge1 := structs.NewEdge()
edge1.UUID = 1
edge1.From = "U001"
edge1.To = "U002"
edge1.Set("createdOn", "2024-5-6")
edge2 := structs.NewEdge()
edge2.UUID = 2
edge2.From = "U002"
edge2.To = "U001"
edge2.Set("createdOn", "2024-5-8")
edges = append(edges, edge1, edge2)

myInsert, err := conn.InsertEdgesBatchBySchema(schema, edges, insertRequestConfig)
if err != nil {
  println(err)
}
println("Operation succeeds:", myInsert.Status.IsSuccess())

Operation succeeds: true

InsertNodesBatchAuto()

Inserts new nodes of one or multiple schemas to the current graph through gRPC. The properties within node values must be consistent with those defined in the corresponding schema structure.

Parameters:

• []Node: The list of Node objects to be inserted.
• InsertRequestConfig (Optional): Configuration settings for the request. If nil is provided, the function will use default configuration settings.

Returns:

• InsertBatchAutoResponse: Result of the request.
• error: An error object containing details about any issues that occurred. nil is returned if the operation is successful.

// Inserts two nodes into schema 'user' and one node into schema `product` in graphset 'lcc' and prints error code

requestConfig := &configuration.RequestConfig{
  UseMaster: true,
  GraphName: "lcc",
}

insertRequestConfig := &configuration.InsertRequestConfig{
  RequestConfig: requestConfig,
  InsertType:    ultipa.InsertType_NORMAL,
}

var N1 []*structs.Node
node1 := structs.NewNode()
node1.Schema = "user"
node1.UUID = 1
node1.ID = "U001"
node1.Set("name", "Alice")
node1.Set("age", 18)
node1.Set("score", 65.32)
node1.Set("birthday", "1993-5-4")
node1.Set("location", "point(23.63 104.25)")
node1.Set("profile", "abc")
node1.Set("interests", []string{"tennis", "violin"})
node1.Set("permissionCodes", []int32{2004, 3025, 1025})
N1 = append(N1, node1)
insert1, err := conn.InsertNodesBatchAuto(N1, insertRequestConfig)
if err != nil {
  println(err)
}
for _, item := range insert1.Resps {
  println("Operation succeeds:", item.Status.IsSuccess())
}

var N2 []*structs.Node
node2 := structs.NewNode()
node2.Schema = "user"
node2.UUID = 2
node2.ID = "U002"
node2.Set("name", "Bob")
node2.Set("age", nil)
node2.Set("score", nil)
node2.Set("birthday", nil)
node2.Set("location", nil)
node2.Set("profile", nil)
node2.Set("interests", nil)
node2.Set("permissionCodes", nil)
N2 = append(N2, node2)
insert2, err := conn.InsertNodesBatchAuto(N2, insertRequestConfig)
if err != nil {
  println(err)
}
println(insert1.ErrorCode)
for _, item := range insert2.Resps {
  println("Operation succeeds:", item.Status.IsSuccess())
}

var N3 []*structs.Node
node3 := structs.NewNode()
node3.Schema = "product"
node3.UUID = 3
node3.ID = "P001"
node3.Set("name", "Wireless Earbud")
node3.Set("price", float32(93.2))
N3 = append(N3, node3)
insert3, err := conn.InsertNodesBatchAuto(N3, insertRequestConfig)
if err != nil {
  println(err)
}
for _, item := range insert3.Resps {
  println("Operation succeeds:", item.Status.IsSuccess())
}

Operation succeeds: true
Operation succeeds: true
Operation succeeds: true

InsertEdgesBatchAuto()

Inserts new edges of one or multiple schemas to the current graph through gRPC. The properties within edge values must be consistent with those defined in the corresponding schema structure.

Parameters:

• []Edge: The list of Edge objects to be inserted.
• InsertRequestConfig (Optional): Configuration settings for the request. If nil is provided, the function will use default configuration settings.

Returns:

• InsertBatchAutoResponse: Result of the request.
• error: An error object containing details about any issues that occurred. nil is returned if the operation is successful.

// Inserts two edges into schema 'follows' and one edge into schema 'purchased' in graphset 'lcc' and prints error code

requestConfig := &configuration.RequestConfig{
  UseMaster: true,
  GraphName: "lcc",
}

insertRequestConfig := &configuration.InsertRequestConfig{
  RequestConfig: requestConfig,
  InsertType:    ultipa.InsertType_NORMAL,
}

var E1 []*structs.Edge
edge1 := structs.NewEdge()
edge1.Schema = "follows"
edge1.UUID = 1
edge1.From = "U001"
edge1.To = "U002"
edge1.Set("createdOn", "2024-5-6")
E1 = append(E1, edge1)

insert1, err := conn.InsertEdgesBatchAuto(E1, insertRequestConfig)
if err != nil {
  println(err)
}
for _, item := range insert1.Resps {
  println("Operation succeeds:", item.Status.IsSuccess())
}

var E2 []*structs.Edge
edge2 := structs.NewEdge()
edge2.Schema = "follows"
edge2.UUID = 2
edge2.From = "U002"
edge2.To = "U001"
edge2.Set("createdOn", "2024-5-8")
E2 = append(E2, edge2)

insert2, err := conn.InsertEdgesBatchAuto(E2, insertRequestConfig)
if err != nil {
  println(err)
}
println(insert1.ErrorCode)
for _, item := range insert2.Resps {
  println("Operation succeeds:", item.Status.IsSuccess())
}

var E3 []*structs.Edge
edge3 := structs.NewEdge()
edge3.Schema = "purchased"
edge3.UUID = 3
edge3.From = "U002"
edge3.To = "P001"
edge3.Set("qty", 1)
E3 = append(E3, edge3)
insert3, err := conn.InsertEdgesBatchAuto(E3, insertRequestConfig)
if err != nil {
  println(err)
}
for _, item := range insert3.Resps {
  println("Operation succeeds:", item.Status.IsSuccess())
}

Operation succeeds: true
Operation succeeds: true
Operation succeeds: true

Deletion

DeleteNodes()

Deletes nodes that meet the given conditions from the current graph. It's important to note that deleting a node leads to the removal of all edges that are connected to it.

Parameters:

• string: The filtering condition to specify the nodes to delete.
• InsertRequestConfig (Optional): Configuration settings for the request. If nil is provided, the function will use default configuration settings.

Returns:

• Response: Result of the request. The Response object contains an alias nodes that holds all the deleted nodes when InsertRequestConfig.Slient is set to true.
• error: An error object containing details about any issues that occurred. nil is returned if the operation is successful.

// Deletes one @user nodes whose name is 'Alice' from graphset 'lcc' and prints error code
// All edges attached to the deleted node are deleted as well

requestConfig := &configuration.RequestConfig{
  UseMaster: true,
  GraphName: "lcc",
}

insertRequestConfig := &configuration.InsertRequestConfig{
  RequestConfig: requestConfig,
  InsertType:    ultipa.InsertType_NORMAL,
}

myDeletion, _ := conn.DeleteNodes("{@user.name == 'Alice'}", insertRequestConfig)
println("Operation succeeds:", myDeletion.Status.IsSuccess())

Operation succeeds: true

DeleteEdges()

Deletes edges that meet the given conditions from the current graph.

Parameters:

• string: The filtering condition to specify the edges to delete.
• InsertRequestConfig (Optional): Configuration settings for the request. If nil is provided, the function will use default configuration settings.

Returns:

• Response: Result of the request. The Response object contains an alias edges that holds all the deleted edges when InsertRequestConfig.Slient is set to true.
• error: An error object containing details about any issues that occurred. nil is returned if the operation is successful.

// Deletes all @purchased edges from graphset 'lcc' and prints error code

requestConfig := &configuration.RequestConfig{
  UseMaster: true,
  GraphName: "lcc",
}

insertRequestConfig := &configuration.InsertRequestConfig{
  RequestConfig: requestConfig,
  InsertType:    ultipa.InsertType_NORMAL,
}

deleteEdge, _ := conn.DeleteEdges("{@purchased}", insertRequestConfig)
println("Operation succeeds:", deleteEdge.Status.IsSuccess()

Operation succeeds: true

Full Example

package main

import (
  ultipa "github.com/ultipa/ultipa-go-sdk/rpc"
  "github.com/ultipa/ultipa-go-sdk/sdk"
  "github.com/ultipa/ultipa-go-sdk/sdk/configuration"
  "github.com/ultipa/ultipa-go-sdk/sdk/structs"
  "github.com/ultipa/ultipa-go-sdk/utils"
)

func main() {

  // Connection configurations
  //URI example: hosts="mqj4zouys.us-east-1.cloud.ultipa.com:60010"
  config, _ := configuration.NewUltipaConfig(&configuration.UltipaConfig{
    Hosts:    []string{"192.168.1.85:60061", "192.168.1.86:60061", "192.168.1.87:60061"},
    Username: "***",
    Password: "***",
  })

  // Establishes connection to the database
  conn, _ := sdk.NewUltipa(config)

  // Request configurations
  requestConfig := &configuration.RequestConfig{
    UseMaster: true,
    GraphName: "lcc",
  }

  // Insert Request configurations
  insertRequestConfig := &configuration.InsertRequestConfig{
    RequestConfig: requestConfig,
    InsertType:    ultipa.InsertType_NORMAL,
  }

  // Inserts two nodes into schema 'user' and one node into schema `product` in graphset 'lcc' and prints error code

  var N1 []*structs.Node
  node1 := structs.NewNode()
  node1.Schema = "user"
  node1.UUID = 1
  node1.ID = "U001"
  node1.Set("name", "Alice")
  node1.Set("age", 18)
  node1.Set("score", 65.32)
  node1.Set("birthday", "1993-5-4")
  node1.Set("location", "point(23.63 104.25)")
  node1.Set("profile", "abc")
  node1.Set("interests", []string{"tennis", "violin"})
  node1.Set("permissionCodes", []int32{2004, 3025, 1025})
  N1 = append(N1, node1)
  insert1, err := conn.InsertNodesBatchAuto(N1, insertRequestConfig)
  if err != nil {
    println(err)
  }
  for _, item := range insert1.Resps {
    println("Operation succeeds:", item.Status.IsSuccess())
  }

  var N2 []*structs.Node
  node2 := structs.NewNode()
  node2.Schema = "user"
  node2.UUID = 2
  node2.ID = "U002"
  node2.Set("name", "Bob")
  node2.Set("age", nil)
  node2.Set("score", nil)
  node2.Set("birthday", nil)
  node2.Set("location", nil)
  node2.Set("profile", nil)
  node2.Set("interests", nil)
  node2.Set("permissionCodes", nil)
  N2 = append(N2, node2)
  insert2, err := conn.InsertNodesBatchAuto(N2, insertRequestConfig)
  if err != nil {
    println(err)
  }
  println(insert1.ErrorCode)
  for _, item := range insert2.Resps {
    println("Operation succeeds:", item.Status.IsSuccess())
  }
  var N3 []*structs.Node
  node3 := structs.NewNode()
  node3.Schema = "product"
  node3.UUID = 3
  node3.ID = "P001"
  node3.Set("name", "Wireless Earbud")
  node3.Set("price", float32(93.2))
  N3 = append(N3, node3)
  insert3, err := conn.InsertNodesBatchAuto(N3, insertRequestConfig)
  if err != nil {
    println(err)
  }
  for _, item := range insert3.Resps {
    println("Operation succeeds:", item.Status.IsSuccess())
  }
};