org.apache.parquet.column

Interface ColumnWriteStore

All Known Implementing Classes:

ColumnWriteStoreV1, ColumnWriteStoreV2

public interface ColumnWriteStore

Container which can construct writers for multiple columns to be stored together.

Author:

Julien Le Dem

Method Summary

Methods

Modifier and Type	Method and Description
void	endRecord() called to notify of record boundaries
void	flush() when we are done writing to flush to the underlying storage
long	getAllocatedSize() used for information
long	getBufferedSize() used to flush row groups to disk
ColumnWriter	getColumnWriter(ColumnDescriptor path)
String	memUsageString() used for debugging pupose

Method Detail

getColumnWriter

ColumnWriter getColumnWriter(ColumnDescriptor path)

Parameters:

path - the column for which to create a writer

Returns:

the column writer for the given column

flush

void flush()

when we are done writing to flush to the underlying storage

endRecord

void endRecord()

called to notify of record boundaries

getAllocatedSize

long getAllocatedSize()

used for information

Returns:

approximate size used in memory

getBufferedSize

long getBufferedSize()

used to flush row groups to disk

Returns:

approximate size of the buffered encoded binary data

memUsageString

String memUsageString()

used for debugging pupose

Returns:

a formated string representing memory usage per column