org.apache.drill.exec.physical.rowSet.impl

Class ColumnState.BaseMapColumnState

java.lang.Object

org.apache.drill.exec.physical.rowSet.impl.ColumnState

org.apache.drill.exec.physical.rowSet.impl.ColumnState.BaseMapColumnState

Direct Known Subclasses:

ColumnState.MapArrayColumnState, ColumnState.MapColumnState

Enclosing class:

ColumnState

public abstract static class ColumnState.BaseMapColumnState
extends ColumnState

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.drill.exec.physical.rowSet.impl.ColumnState

ColumnState.BaseMapColumnState, ColumnState.MapArrayColumnState, ColumnState.MapColumnState, ColumnState.State

Field Summary

Fields

Modifier and Type	Field and Description
protected TupleState.MapState	mapState

Fields inherited from class org.apache.drill.exec.physical.rowSet.impl.ColumnState

addVersion, outerCardinality, resultSetLoader, state, vectorState, writer

Constructor Summary

Constructors

Constructor and Description
BaseMapColumnState(ResultSetLoaderImpl resultSetLoader, AbstractObjectWriter writer, VectorState vectorState, org.apache.drill.exec.physical.rowSet.impl.ProjectionSet projectionSet)

Method Summary

Modifier and Type	Method and Description
void	close()
void	harvestWithLookAhead() Writing of a row batch is complete.
TupleState.MapState	mapState()
void	rollover() A column within the row batch overflowed.
void	startBatch() Prepare the column for a new row batch after overflow on the previous batch.

Methods inherited from class org.apache.drill.exec.physical.rowSet.impl.ColumnState

allocateVectors, dump, schema, updateCardinality, vector, writer

Methods inherited from class java.lang.Object

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

Field Detail

mapState

protected final TupleState.MapState mapState

Constructor Detail

BaseMapColumnState

public BaseMapColumnState(ResultSetLoaderImpl resultSetLoader,
                          AbstractObjectWriter writer,
                          VectorState vectorState,
                          org.apache.drill.exec.physical.rowSet.impl.ProjectionSet projectionSet)

Method Detail

rollover

public void rollover()

Description copied from class: ColumnState

A column within the row batch overflowed. Prepare to absorb the rest of the in-flight row by rolling values over to a new vector, saving the complete vector for later. This column could have a value for the overflow row, or for some previous row, depending on exactly when and where the overflow occurs.

Overrides:

rollover in class ColumnState

startBatch

public void startBatch()

Description copied from class: ColumnState

Prepare the column for a new row batch after overflow on the previous batch. Restore the look-ahead buffer to the active vector so we start writing where we left off.

Overrides:

startBatch in class ColumnState

harvestWithLookAhead

public void harvestWithLookAhead()

Description copied from class: ColumnState

Writing of a row batch is complete. Prepare the vector for harvesting to send downstream. If this batch encountered overflow, set aside the look-ahead vector and put the full vector buffer back into the active vector.

Overrides:

harvestWithLookAhead in class ColumnState

close

public void close()

Overrides:

close in class ColumnState

mapState

public TupleState.MapState mapState()