org.apache.paimon.format.parquet.reader

类 BooleanColumnReader

java.lang.Object

org.apache.paimon.format.parquet.reader.AbstractColumnReader<org.apache.paimon.data.columnar.writable.WritableBooleanVector>

org.apache.paimon.format.parquet.reader.BooleanColumnReader

所有已实现的接口:

ColumnReader<org.apache.paimon.data.columnar.writable.WritableBooleanVector>

public class BooleanColumnReader
extends AbstractColumnReader<org.apache.paimon.data.columnar.writable.WritableBooleanVector>

Boolean ColumnReader.

字段概要

从类继承的字段 org.apache.paimon.format.parquet.reader.AbstractColumnReader

descriptor, dictionary, maxDefLevel, runLenDecoder

构造器概要

构造器

构造器和说明
BooleanColumnReader(org.apache.parquet.column.ColumnDescriptor descriptor, org.apache.parquet.column.page.PageReader pageReader)

方法概要

限定符和类型	方法和说明
protected void	afterReadPage() After read a page, we may need some initialization.
protected void	readBatch(int rowId, int num, org.apache.paimon.data.columnar.writable.WritableBooleanVector column) Read batch from AbstractColumnReader.runLenDecoder and AbstractColumnReader.dataInputStream.
protected void	readBatchFromDictionaryIds(int rowId, int num, org.apache.paimon.data.columnar.writable.WritableBooleanVector column, org.apache.paimon.data.columnar.writable.WritableIntVector dictionaryIds) Decode dictionary ids to data.
protected boolean	supportLazyDecode() Support lazy dictionary ids decode.

从类继承的方法 org.apache.paimon.format.parquet.reader.AbstractColumnReader

checkTypeName, readToVector

从类继承的方法 java.lang.Object

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

构造器详细资料

BooleanColumnReader

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

抛出:

IOException

方法详细资料

supportLazyDecode

protected boolean supportLazyDecode()

从类复制的说明: AbstractColumnReader

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

覆盖:

supportLazyDecode 在类中 AbstractColumnReader<org.apache.paimon.data.columnar.writable.WritableBooleanVector>

afterReadPage

protected void afterReadPage()

从类复制的说明: AbstractColumnReader

After read a page, we may need some initialization.

覆盖:

afterReadPage 在类中 AbstractColumnReader<org.apache.paimon.data.columnar.writable.WritableBooleanVector>

readBatchFromDictionaryIds

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

从类复制的说明: AbstractColumnReader

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

指定者:

readBatchFromDictionaryIds 在类中 AbstractColumnReader<org.apache.paimon.data.columnar.writable.WritableBooleanVector>

readBatch

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

从类复制的说明: AbstractColumnReader

Read batch from AbstractColumnReader.runLenDecoder and AbstractColumnReader.dataInputStream.

指定者:

readBatch 在类中 AbstractColumnReader<org.apache.paimon.data.columnar.writable.WritableBooleanVector>