public class DoubleColumnReader extends AbstractColumnReader<WritableDoubleVector>
ColumnReader
.descriptor, dictionary, maxDefLevel, runLenDecoder
Constructor and Description |
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DoubleColumnReader(org.apache.parquet.column.ColumnDescriptor descriptor,
org.apache.parquet.column.page.PageReader pageReader) |
Modifier and Type | Method and Description |
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protected void |
readBatch(int rowId,
int num,
WritableDoubleVector column)
Read batch from
AbstractColumnReader.runLenDecoder and AbstractColumnReader.dataInputStream . |
protected void |
readBatchFromDictionaryIds(int rowId,
int num,
WritableDoubleVector column,
WritableIntVector dictionaryIds)
Decode dictionary ids to data.
|
afterReadPage, checkTypeName, readToVector, supportLazyDecode
public DoubleColumnReader(org.apache.parquet.column.ColumnDescriptor descriptor, org.apache.parquet.column.page.PageReader pageReader) throws IOException
IOException
protected void readBatch(int rowId, int num, WritableDoubleVector column)
AbstractColumnReader
AbstractColumnReader.runLenDecoder
and AbstractColumnReader.dataInputStream
.readBatch
in class AbstractColumnReader<WritableDoubleVector>
protected void readBatchFromDictionaryIds(int rowId, int num, WritableDoubleVector column, WritableIntVector dictionaryIds)
AbstractColumnReader
AbstractColumnReader.runLenDecoder
and AbstractColumnReader.dictionaryIdsDecoder
.readBatchFromDictionaryIds
in class AbstractColumnReader<WritableDoubleVector>
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