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Neo4j

Neo4j sink connector

Description​

Write data to Neo4j.

neo4j-java-driver version 4.4.9

Key features​

Options​

nametyperequireddefault value
uriStringYes-
usernameStringNo-
passwordStringNo-
max_batch_sizeIntegerNo-
write_modeStringNoOneByOne
bearer_tokenStringNo-
kerberos_ticketStringNo-
databaseStringYes-
queryStringYes-
queryParamPositionObjectYes-
max_transaction_retry_timeLongNo30
max_connection_timeoutLongNo30
common-optionsconfigno-

uri [string]​

The URI of the Neo4j database. Refer to a case: neo4j://localhost:7687

username [string]​

username of the Neo4j

password [string]​

password of the Neo4j. required if username is provided

max_batch_size[Integer]​

max_batch_size refers to the maximum number of data entries that can be written in a single transaction when writing to a database.

write_mode​

The default value is oneByOne, or set it to "Batch" if you want to have the ability to write in batches

unwind $ttt as row create (n:Label) set n.name = row.name,n.age = rw.age

"ttt" represents a batch of data.,"ttt" can be any arbitrary string as long as it matches the configured "batch_data_variable".

bearer_token [string]​

base64 encoded bearer token of the Neo4j. for Auth.

kerberos_ticket [string]​

base64 encoded kerberos ticket of the Neo4j. for Auth.

database [string]​

database name.

query [string]​

Query statement. contain parameter placeholders that are substituted with the corresponding values at runtime

queryParamPosition [object]​

position mapping information for query parameters.

key name is parameter placeholder name.

associated value is position of field in input data row.

max_transaction_retry_time [long]​

maximum transaction retry time(seconds). transaction fail if exceeded

max_connection_timeout [long]​

The maximum amount of time to wait for a TCP connection to be established (seconds)

common options​

Sink plugin common parameters, please refer to Sink Common Options for details

WriteOneByOneExample​

sink {
Neo4j {
uri = "neo4j://localhost:7687"
username = "neo4j"
password = "1234"
database = "neo4j"

max_transaction_retry_time = 10
max_connection_timeout = 10

query = "CREATE (a:Person {name: $name, age: $age})"
queryParamPosition = {
name = 0
age = 1
}
}
}

WriteBatchExample​

The unwind keyword provided by cypher supports batch writing, and the default variable for a batch of data is batch. If you write a batch write statement, then you should declare cypher:unwind $batch as row to do someting

sink {
Neo4j {
uri = "bolt://localhost:7687"
username = "neo4j"
password = "neo4j"
database = "neo4j"
max_batch_size = 1000
write_mode = "BATCH"
max_transaction_retry_time = 3
max_connection_timeout = 10

query = "unwind $batch as row create(n:MyLabel) set n.name = row.name,n.age = row.age"

} }


## Changelog

### 2.2.0-beta 2022-09-26

- Add Neo4j Sink Connector

### issue ##4835

- Sink supports batch write