Package org.apache.flink.formats.parquet.vector.reader

Class BooleanColumnReader

java.lang.Object

org.apache.flink.formats.parquet.vector.reader.AbstractColumnReader<org.apache.flink.table.data.columnar.vector.writable.WritableBooleanVector>

org.apache.flink.formats.parquet.vector.reader.BooleanColumnReader

All Implemented Interfaces:

ColumnReader<org.apache.flink.table.data.columnar.vector.writable.WritableBooleanVector>

public class BooleanColumnReader
extends AbstractColumnReader<org.apache.flink.table.data.columnar.vector.writable.WritableBooleanVector>

Boolean ColumnReader.

Field Summary

Fields inherited from class org.apache.flink.formats.parquet.vector.reader.AbstractColumnReader

descriptor, dictionary, maxDefLevel, runLenDecoder

Constructor Summary

Constructors

Constructor	Description
BooleanColumnReader(org.apache.parquet.column.ColumnDescriptor descriptor, org.apache.parquet.column.page.PageReader pageReader)

Method Summary

Modifier and Type	Method	Description
protected void	afterReadPage()	After read a page, we may need some initialization.
protected void	readBatch(int rowId, int num, org.apache.flink.table.data.columnar.vector.writable.WritableBooleanVector column)	Read batch from AbstractColumnReader.runLenDecoder and AbstractColumnReader.dataInputStream.
protected void	readBatchFromDictionaryIds(int rowId, int num, org.apache.flink.table.data.columnar.vector.writable.WritableBooleanVector column, org.apache.flink.table.data.columnar.vector.writable.WritableIntVector dictionaryIds)	Decode dictionary ids to data.
protected boolean	supportLazyDecode()	Support lazy dictionary ids decode.

Methods inherited from class org.apache.flink.formats.parquet.vector.reader.AbstractColumnReader

checkTypeName, readToVector

Methods inherited from class java.lang.Object

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

Constructor Detail

BooleanColumnReader

public BooleanColumnReader(org.apache.parquet.column.ColumnDescriptor descriptor,
                           org.apache.parquet.column.page.PageReader pageReader)
                    throws IOException

Throws:

IOException

Method Detail

supportLazyDecode

protected boolean supportLazyDecode()

Description copied from class: AbstractColumnReader

Support lazy dictionary ids decode. See more in ParquetDictionary. If return false, we will decode all the data first.

Overrides:

supportLazyDecode in class AbstractColumnReader<org.apache.flink.table.data.columnar.vector.writable.WritableBooleanVector>

afterReadPage

protected void afterReadPage()

Description copied from class: AbstractColumnReader

After read a page, we may need some initialization.

Overrides:

afterReadPage in class AbstractColumnReader<org.apache.flink.table.data.columnar.vector.writable.WritableBooleanVector>

readBatchFromDictionaryIds

protected void readBatchFromDictionaryIds(int rowId,
                                          int num,
                                          org.apache.flink.table.data.columnar.vector.writable.WritableBooleanVector column,
                                          org.apache.flink.table.data.columnar.vector.writable.WritableIntVector dictionaryIds)

Description copied from class: AbstractColumnReader

Decode dictionary ids to data. From AbstractColumnReader.runLenDecoder and AbstractColumnReader.dictionaryIdsDecoder.

Specified by:

readBatchFromDictionaryIds in class AbstractColumnReader<org.apache.flink.table.data.columnar.vector.writable.WritableBooleanVector>

readBatch

protected void readBatch(int rowId,
                         int num,
                         org.apache.flink.table.data.columnar.vector.writable.WritableBooleanVector column)

Description copied from class: AbstractColumnReader

Read batch from AbstractColumnReader.runLenDecoder and AbstractColumnReader.dataInputStream.

Specified by:

readBatch in class AbstractColumnReader<org.apache.flink.table.data.columnar.vector.writable.WritableBooleanVector>