org.apache.parquet.internal.column.columnindex

Interface OffsetIndex

public interface OffsetIndex

Offset index containing the offset and size of the page and the index of the first row in the page.

See Also:

OffsetIndex

Method Summary

Modifier and Type	Method and Description
int	getCompressedPageSize(int pageIndex)
long	getFirstRowIndex(int pageIndex)
default long	getLastRowIndex(int pageIndex, long rowGroupRowCount)
long	getOffset(int pageIndex)
int	getPageCount()
default int	getPageOrdinal(int pageIndex)
default Optional<Long>	getUnencodedByteArrayDataBytes(int pageIndex)

Method Detail

getPageCount

int getPageCount()

Returns:

the number of pages

getOffset

long getOffset(int pageIndex)

Parameters:

pageIndex - the index of the page

Returns:

the offset of the page in the file

getCompressedPageSize

int getCompressedPageSize(int pageIndex)

Parameters:

pageIndex - the index of the page

Returns:

the compressed size of the page (including page header)

getFirstRowIndex

long getFirstRowIndex(int pageIndex)

Parameters:

pageIndex - the index of the page

Returns:

the index of the first row in the page

getPageOrdinal

default int getPageOrdinal(int pageIndex)

Parameters:

pageIndex - the index of the page

Returns:

the original ordinal of the page in the column chunk

getLastRowIndex

default long getLastRowIndex(int pageIndex,
                             long rowGroupRowCount)

Parameters:

pageIndex - the index of the page

rowGroupRowCount - the total number of rows in the row-group

Returns:

the calculated index of the last row of the given page

getUnencodedByteArrayDataBytes

default Optional<Long> getUnencodedByteArrayDataBytes(int pageIndex)

Parameters:

pageIndex - the index of the page

Returns:

unencoded/uncompressed size for BYTE_ARRAY types; or empty for other types. Please note that even for BYTE_ARRAY types, this value might not have been written.