我正在尝试通过从scala代码中将CSV文件加载到neo4j来创建图形。
我使用定期提交导致以下错误:
Exception in thread "main" org.neo4j.driver.v1.exceptions.ClientException:
Executing queries that use periodic commit in an open transaction is not possible.
有关我为什么会收到此错误以及如何避免错误的任何帮助?我正在使用定期提交,因为我将加载超过100k节点。有定期提交的替代方法吗?
代码:
def createGraph(createStmt: ArrayBuffer[String]): Unit = {
val session = driver.session()
val greeting: String = session.writeTransaction(new TransactionWork[String]() {
override def execute(transaction: Transaction): String = {
var result1: StatementResult = transaction.run("USING PERIODIC COMMIT\n"+
"LOAD CSV WITH HEADERS FROM \"file:///path/to/file.csv\" AS csvLine\n"+
"CREATE (p:Person {id: toInt(csvLine.id), name: csvLine.name})")
"Graph Created"
}
})
}
答案 0 :(得分:1)
事务上的driver docs表明"自动提交事务是执行USING PERIODIC COMMIT Cypher语句的唯一方法。"
自动提交作为session.run(...)执行,无需使用session.writeTransaction(...
启动新事务。)