使用 neo4j jdbc 驱动程序和 Z767EC634238039F6EZ61EB4B 的准备语句中的 cypher 查询中的参数语法是什么？

Question

I understand that neo4j 4.x now does not support parameters with such syntax - {1} and now supports $param. Has the syntax to execute preparedStatement also changed. What I mean by this is - when I try to execute query such as with new jdbc driver 4.0.1 and neo4j 4.2.3:

  String query = "MATCH (u:User)-[:FRIEND]-(f:User) WHERE u.name = {1} RETURN f.name, f.age";
    try (PreparedStatement stmt = con.prepareStatement(query)) {
        stmt.setString(1,"John");

        try (ResultSet rs = stmt.executeQuery()) {
            while (rs.next()) {
                System.out.println("Friend: "+rs.getString("f.name")+" is "+rs.getInt("f.age"));
            }
        }
    }

I get this error - ParameterIndex does not correspond to a parameter marker in the SQL statement

Hence is the syntax of {1} in prepared statement query with newer version of neo4j 4.2.3 and jdbc driver 4.0.1 still valid or are there any changes needed? If otherwise then could you also suggest what could be the error here. Thanks in advance !

Answer 1

The {param} syntax does not work for Neo4j 4.x. Instead, you need to change to the $param-style. That means, if you change {1} to $1 in your cypher query, the prepared statemen will work again.