Cassandra用Java保存文件中的数据

时间:2018-03-08 16:44:34

标签: java oop cassandra aop

我通过materiliazed视图使用Java存储数据到Cassandra但是我遇到了问题。问题是它不会将数据保存到Cassandra数据库。我收到了这个错误。

No columns are defined for Materialized View other than primary key
  

REATE MATERIALIZED VIEW IF NOT iSISTS sensorkeyspace.maxtable AS select sensor_id,来自sensorkeyspace.sensortable的湿度(湿度不为空)PRIMARY KEY(sensor_id)   线程" main"中的例外情况com.datastax.driver.core.exceptions.InvalidQueryException:没有为主键以外的物化视图定义列       at com.datastax.driver.core.exceptions.InvalidQueryException.copy(InvalidQueryException.java:50)       在com.datastax.driver.core.DriverThrowables.propagateCause(DriverThrowables.java:37)       at com.datastax.driver.core.DefaultResultSetFuture.getUninterruptibly(DefaultResultSetFuture.java:245)       在com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:64)       在com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:39)       在sparkproject.SparkApp.main(SparkApp.java:41)   引起:com.datastax.driver.core.exceptions.InvalidQueryException:没有为主键以外的物化视图定义列       at com.datastax.driver.core.Responses $ Error.asException(Responses.java:136)       at com.datastax.driver.core.DefaultResultSetFuture.onSet(DefaultResultSetFuture.java:179)       在com.datastax.driver.core.RequestHandler.setFinalResult(RequestHandler.java:174)       在com.datastax.driver.core.RequestHandler.access $ 2600(RequestHandler.java:43)       at com.datastax.driver.core.RequestHandler $ SpeculativeExecution.setFinalResult(RequestHandler.java:793)       at com.datastax.driver.core.RequestHandler $ SpeculativeExecution.onSet(RequestHandler.java:627)       at com.datastax.driver.core.Connection $ Dispatcher.channelRead0(Connection.java:1012)       在com.datastax.driver.core.Connection $ Dispatcher.channelRead0(Connection.java:935)       在io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)       at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:342)       在io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:328)

1 个答案:

答案 0 :(得分:2)

看起来您正在使用与主表相同的主键创建物化视图。请检查MV定义