org.apache.parquet.column.page

Interface PageReadStore

public interface PageReadStore

contains all the readers for all the columns of the corresponding row group TODO: rename to RowGroup?

Method Summary

Modifier and Type	Method and Description
PageReader	getPageReader(ColumnDescriptor descriptor)
long	getRowCount()
default Optional<PrimitiveIterator.OfLong>	getRowIndexes() Returns the indexes of the rows to be read/built if the related data is available.

Method Detail

getPageReader

PageReader getPageReader(ColumnDescriptor descriptor)

Parameters:

descriptor - the descriptor of the column

Returns:

the page reader for that column

getRowCount

long getRowCount()

Returns:

the total number of rows in that row group

getRowIndexes

default Optional<PrimitiveIterator.OfLong> getRowIndexes()

Returns the indexes of the rows to be read/built if the related data is available. All the rows which index is not returned shall be skipped.

Returns:

the optional of the incremental iterator of the row indexes or an empty optional if the related data is not available