com.netflix.astyanax.cql.reads

Class CqlColumnCountQueryImpl

java.lang.Object

com.netflix.astyanax.cql.reads.CqlColumnCountQueryImpl

All Implemented Interfaces:

com.netflix.astyanax.Execution<java.lang.Integer>, com.netflix.astyanax.query.ColumnCountQuery

public class CqlColumnCountQueryImpl
extends java.lang.Object
implements com.netflix.astyanax.query.ColumnCountQuery

Impl for ColumnCountQuery Note that since this query essentially derives itself from the RowQuery interface, it also uses the statement constructed by the CqlRowQueryImpl class. The difference in functionality is in how the records form the result set are parsed. Here we look at the number of rows returned for the same row key. Note that since CQL3 can treat columns as rows (depending on the schema), we look for multiple rows with the same row keys. If there are multiple rows, then we count the number of rows for each unique row key. If there is just one row and the schema definition is like a flat table, then we just count the actual no of data columns returned in the result set. See CqlRowQueryImpl for more details on how the query is actually constructed

Constructor Summary

Constructors

Constructor and Description
CqlColumnCountQueryImpl(CqlKeyspaceImpl.KeyspaceContext ksCtx, CFQueryContext<?,?> cfCtx, com.datastax.driver.core.Statement query)

Method Summary

Modifier and Type	Method and Description
com.netflix.astyanax.connectionpool.OperationResult<java.lang.Integer>	execute()
com.google.common.util.concurrent.ListenableFuture<com.netflix.astyanax.connectionpool.OperationResult<java.lang.Integer>>	executeAsync()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CqlColumnCountQueryImpl

public CqlColumnCountQueryImpl(CqlKeyspaceImpl.KeyspaceContext ksCtx,
                               CFQueryContext<?,?> cfCtx,
                               com.datastax.driver.core.Statement query)

Method Detail

execute

public com.netflix.astyanax.connectionpool.OperationResult<java.lang.Integer> execute()
                                                                               throws com.netflix.astyanax.connectionpool.exceptions.ConnectionException

Specified by:

execute in interface com.netflix.astyanax.Execution<java.lang.Integer>

Throws:

com.netflix.astyanax.connectionpool.exceptions.ConnectionException

executeAsync

public com.google.common.util.concurrent.ListenableFuture<com.netflix.astyanax.connectionpool.OperationResult<java.lang.Integer>> executeAsync()
                                                                                                                                        throws com.netflix.astyanax.connectionpool.exceptions.ConnectionException

Specified by:

executeAsync in interface com.netflix.astyanax.Execution<java.lang.Integer>

Throws:

com.netflix.astyanax.connectionpool.exceptions.ConnectionException