Cassandra 正在 Java 中的文件中保存数据
Cassandra Saving data from file in Java
我正在使用 java 通过实体化视图将数据存储到 Cassandra，但我遇到了问题。问题是它不会将数据保存到 Cassandra 数据库。我收到这个错误。
No columns are defined for Materialized View other than primary key
REATE MATERIALIZED VIEW IF NOT EXISTS sensorkeyspace.maxtable AS select sensor_id,humidity from sensorkeyspace.sensortable where (humidity is not null) PRIMARY KEY (sensor_id)
Exception in thread "main" com.datastax.driver.core.exceptions.InvalidQueryException: No columns are defined for Materialized View other than primary key
at com.datastax.driver.core.exceptions.InvalidQueryException.copy(InvalidQueryException.java:50)
at com.datastax.driver.core.DriverThrowables.propagateCause(DriverThrowables.java:37)
at com.datastax.driver.core.DefaultResultSetFuture.getUninterruptibly(DefaultResultSetFuture.java:245)
at com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:64)
at com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:39)
at sparkproject.SparkApp.main(SparkApp.java:41)
Caused by: com.datastax.driver.core.exceptions.InvalidQueryException: No columns are defined for Materialized View other than primary key
at com.datastax.driver.core.Responses$Error.asException(Responses.java:136)
at com.datastax.driver.core.DefaultResultSetFuture.onSet(DefaultResultSetFuture.java:179)
at com.datastax.driver.core.RequestHandler.setFinalResult(RequestHandler.java:174)
at com.datastax.driver.core.RequestHandler.access00(RequestHandler.java:43)
at com.datastax.driver.core.RequestHandler$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)
at com.datastax.driver.core.Connection$Dispatcher.channelRead0(Connection.java:935)
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:342)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:328)
看起来您正在使用与主键相同的主键创建物化视图 table。请检查MV定义
我正在使用 java 通过实体化视图将数据存储到 Cassandra，但我遇到了问题。问题是它不会将数据保存到 Cassandra 数据库。我收到这个错误。
No columns are defined for Materialized View other than primary key
REATE MATERIALIZED VIEW IF NOT EXISTS sensorkeyspace.maxtable AS select sensor_id,humidity from sensorkeyspace.sensortable where (humidity is not null) PRIMARY KEY (sensor_id) Exception in thread "main" com.datastax.driver.core.exceptions.InvalidQueryException: No columns are defined for Materialized View other than primary key at com.datastax.driver.core.exceptions.InvalidQueryException.copy(InvalidQueryException.java:50) at com.datastax.driver.core.DriverThrowables.propagateCause(DriverThrowables.java:37) at com.datastax.driver.core.DefaultResultSetFuture.getUninterruptibly(DefaultResultSetFuture.java:245) at com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:64) at com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:39) at sparkproject.SparkApp.main(SparkApp.java:41) Caused by: com.datastax.driver.core.exceptions.InvalidQueryException: No columns are defined for Materialized View other than primary key at com.datastax.driver.core.Responses$Error.asException(Responses.java:136) at com.datastax.driver.core.DefaultResultSetFuture.onSet(DefaultResultSetFuture.java:179) at com.datastax.driver.core.RequestHandler.setFinalResult(RequestHandler.java:174) at com.datastax.driver.core.RequestHandler.access00(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$Dispatcher.channelRead0(Connection.java:1012) at com.datastax.driver.core.Connection$Dispatcher.channelRead0(Connection.java:935) at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:342) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:328)
看起来您正在使用与主键相同的主键创建物化视图 table。请检查MV定义