org.apache.drill.exec.vector.accessor.writer

Class ScalarArrayWriter.ScalarElementWriterIndex

java.lang.Object

org.apache.drill.exec.vector.accessor.writer.AbstractArrayWriter.ArrayElementWriterIndex

org.apache.drill.exec.vector.accessor.writer.ScalarArrayWriter.ScalarElementWriterIndex

All Implemented Interfaces:

ColumnWriterIndex

Enclosing class:

ScalarArrayWriter

public class ScalarArrayWriter.ScalarElementWriterIndex
extends AbstractArrayWriter.ArrayElementWriterIndex

For scalar arrays, incrementing the element index and committing the current value is done automatically since there is exactly one value per array element.

Constructor Summary

Constructors

Constructor and Description
ScalarElementWriterIndex()

Method Summary

Modifier and Type	Method and Description
void	nextElement() Increment the index for an array.
void	prevElement() Decrement the index for an array.

Methods inherited from class org.apache.drill.exec.vector.accessor.writer.AbstractArrayWriter.ArrayElementWriterIndex

arraySize, next, outerIndex, prev, reset, rollover, rowStartIndex, toString, valueStartOffset, vectorIndex

Methods inherited from class java.lang.Object

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

Constructor Detail

ScalarElementWriterIndex

public ScalarElementWriterIndex()

Method Detail

nextElement

public final void nextElement()

Description copied from interface: ColumnWriterIndex

Increment the index for an array. For arrays, writing (or saving) one value automatically moves to the next value. Ignored for non-element indexes.

Specified by:

nextElement in interface ColumnWriterIndex

Overrides:

nextElement in class AbstractArrayWriter.ArrayElementWriterIndex

prevElement

public final void prevElement()

Description copied from interface: ColumnWriterIndex

Decrement the index for an array. Used exclusively for appending bytes to a VarChar, Var16Char or VarBytes column. Assumed to be followed by another call to nextElement().

Specified by:

prevElement in interface ColumnWriterIndex

Overrides:

prevElement in class AbstractArrayWriter.ArrayElementWriterIndex