This page demonstrates the process of importing data from a Neo4j database into a graph in Ultipa.

The following steps are demonstrated using PowerShell (Windows).

Generate the Configuration File

Open the terminal program and navigate to the folder containing ultipa-importer. Then, run the following command and select neo4j to generate a sample configuration file for Neo4j:

./ultipa-importer --sample

A file named import.sample.neo4j.yml will be generated in the same directory as ultipa-importer. If the file already exists, it will be overwritten.

Modify the Configuration File

Customize the import.sample.neo4j.yml configuration file based on your specific requirements. It includes the following sections:

• mode: Set to neo4j.
• neo4j: Configure the connection to your Neo4j database.
• server: Provide your Ultipa server details and specify the target graph (new or existing) for data import.
• nodeConfig: Define node schemas, where each schema corresponds to a label. Columns in the query results are mapped to node properties.
• edgeConfig: Define edge schemas, where each schema corresponds to a relationship. Columns in the query results are mapped to edge properties.
• settings: Set global import preferences and parameters.

# Mode options: csv/json/jsonl/rdf/graphml/bigQuery/sql/kafka/neo4j/salesforce
mode: neo4j

# Neo4j server configurations
neo4j:
  # Host Address or URI, "neo4j://xxx:" or "neo4j+s://xxx"
  host: "neo4j+s://123xxx.databases.neo4j.io"
  username: "user123"
  password: "password123"
  # Database name 
  database: "trading"

# Ultipa server configurations
server:
  # Host IP/URI and port; if it's a cluster, separate multiple hosts with commas
  host: "10.11.22.33:1234"
  username: "admin"
  password: "admin12345"
  # The new or existing graph for data import
  graphset: "myGraph"
  # If the above graphset is new, specify the shards where the graph will be stored  
  shards: "1,2,3"
  # If the above graphset is new, specify the partition function (Crc32/Crc64WE/Crc64XZ/CityHash64) used for sharding
  partitionBy: "Crc32"
  # Path of the certificate file for TLS encryption
  crt: ""

# Node configurations
nodeConfig:
    # Specify the schema
  - schema: "Customer"
    # Specify the label in Neo4j
    label: "customer"
    # Set a condition (if needed) to query the label with variable 'n'
    where: n.level > 0
    # Set a limit (if needed) to restrict returned records 
    limit:     
    # properties: Map Neo4j query results to properties; columns mapped to system properties such as _id, _from or _to in the Neo4j query results must be explicitly configured
    ## name: The property name in the Neo4j database; to use Neo4j's identity, start, or end properties, set the name as <id>, <start>, or <end>
    ## new_name: The property name in Ultipa; it defaults to the name above
    ## type: The property type; you can set to _id, _from, _to, or other Ultipa property value types like int64, float, string, etc; set to _ignore to skip importing the column
    ## prefix: Add a prefix to the values of a property; only apply to _id, _from, and _to
    properties:
      - name: <id>
        type: _id
      - name: cust_no
        type: string
      - name: name
        type: string
      - name: level
        type: int32
  - schema: "Merchant"
    label: "merchant"
    properties:
      - name : <id>
        type: _id

# Edge configurations
edgeConfig:
  - schema: "Transfers"
    # Specify the relationship of nodes imported from Neo4j
    relationship: "transfers"
    # Set a condition (if needed) to query the relationship with the variable 'r'
    where: 
    properties:
      - name: <start>
        type: _from
      - name: <end>
        type: _to
      - name: trans_no
        type: string
      - name: time
        type: datetime

# Global settings        
settings:
  # Path of the log file
  logPath: "./logs"
  # Number of rows included in each insertion batch
  batchSize: 10000
  # Import mode: insert/overwrite/upsert
  importMode: insert
  # Automatically create missing end nodes for edges
  createNodeIfNotExist: false
  # Stops the importing process when error occurs
  stopWhenError: false
  # Set to true to automatically create new graph, schemas and properties
  yes: true
  # The maximum threads
  threads: 32
  # The maximum size (in MB) of each packet
  maxPacketSize: 40
  # Timezone for the timestamp values
  # timeZone: "+0200"
  # Timestamp value unit, support ms/s
  timestampUnit: s

Execute Import

Execute the import by specifying the configuration file using the --config flag:

./ultipa-importer --config import.sample.neo4j.yml