使用DataStax客户端将参数传递到Cassandra CQL查询 [英] Passing parameter to Cassandra CQL query using DataStax client

问题描述

我使用datastax作为连接到cassandra的客户端。我已经成功地通过Java连接到cassandra cluster / keyspace /列族。我试着，发射一些查询cassandra列家庭thriugh java。对我来说，它是为简单的查询工作

I am using datastax as a client for connecting to cassandra. I have successfully connected to cassandra cluster/keyspace/column families through Java. I am trying, firing some queries on cassandra column family thriugh java. For me it is working for simple queries like

ResultSet results = session.execute("select * from demodb.customer where id = 1");

现在我想从用户的id参数传递 session.execute ; 语句。
我应该怎么办呢？

Now I want to take id parameter from user and pass it to session.execute(); statement. How should I go about it?

推荐答案

这里是一个代码示例，语句。

Here is a code example of inserting data about an image using a prepared statements.

PreparedStatement statement = getSession().prepare(
                               "INSERT INTO pixelstore.image " +
                               "(image_name, " +
                               " upload_time, " + 
                               " upload_by, " + 
                               " file_type, " + 
                               " file_size" +
                               ") VALUES (?, ?, ?, ?, ?);"); 

// create the bound statement and initialise it with your prepared statement
BoundStatement boundStatement = new BoundStatement(statement);

session.execute( // this is where the query is executed
  boundStatement.bind( // here you are binding the 'boundStatement'
    "background", TimeUtil.getTimeUUID(),  "lyubent", "png", "130527"));

地球cassandra上最近发布了两个博客文章，演示驱动程序可以做什么包含代码示例，请查看：

There have been two recent blog posts on planet cassandra with a demo of what the driver can do, they contain code examples so check them out:

1. 使用Cassandra和DataStax Java驱动程序的物化视图

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