com.datastax.oss.driver.api.core.cql

Interface ResultSet

All Superinterfaces:

Iterable<Row>, PagingIterable<Row>

All Known Subinterfaces:

ContinuousResultSet

public interface ResultSet
extends PagingIterable<Row>

The result of a synchronous CQL query.

See PagingIterable for a few generic explanations about the behavior of this object; in particular, implementations are not thread-safe. They can only be iterated by the thread that invoked session.execute.

See Also:

SyncCqlSession.execute(Statement), SyncCqlSession.execute(String)

Method Summary

Modifier and Type	Method and Description
boolean	wasApplied() If the query that produced this result was a CQL conditional update, indicate whether it was successfully applied.

Methods inherited from interface com.datastax.oss.driver.api.core.PagingIterable

all, getAvailableWithoutFetching, getColumnDefinitions, getExecutionInfo, getExecutionInfos, isFullyFetched, map, one, spliterator

Methods inherited from interface java.lang.Iterable

forEach, iterator

Method Detail

wasApplied

boolean wasApplied()

If the query that produced this result was a CQL conditional update, indicate whether it was successfully applied.

For consistency, this method always returns true for non-conditional queries (although there is no reason to call the method in that case). This is also the case for conditional DDL statements (CREATE KEYSPACE... IF NOT EXISTS, CREATE TABLE... IF NOT EXISTS), for which Cassandra doesn't return an [applied] column.

Note that, for versions of Cassandra strictly lower than 2.1.0-rc2, a server-side bug (CASSANDRA-7337) causes this method to always return true for batches containing conditional queries.

This is equivalent to calling:

   this.iterator().next().getBoolean("[applied]")
 

Except that this method peeks at the next row without consuming it.

Specified by:

wasApplied in interface PagingIterable<Row>