org.apache.hudi.table.format.cow.vector.reader

Class EmptyColumnReader

java.lang.Object

org.apache.hudi.table.format.cow.vector.reader.EmptyColumnReader

All Implemented Interfaces:

org.apache.flink.formats.parquet.vector.reader.ColumnReader<org.apache.flink.table.data.columnar.vector.writable.WritableColumnVector>

public class EmptyColumnReader
extends Object
implements org.apache.flink.formats.parquet.vector.reader.ColumnReader<org.apache.flink.table.data.columnar.vector.writable.WritableColumnVector>

Empty ColumnReader.

This reader is to handle parquet files that have not been updated to the latest Schema. When reading a parquet file with the latest schema, parquet file might not have the new field. The EmptyColumnReader is used to handle such scenarios.

Constructor Summary

Constructors

Constructor and Description
EmptyColumnReader()

Method Summary

Modifier and Type	Method and Description
void	readToVector(int readNumber, org.apache.flink.table.data.columnar.vector.writable.WritableColumnVector vector)

Methods inherited from class java.lang.Object

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

Constructor Detail

EmptyColumnReader

public EmptyColumnReader()

Method Detail

readToVector

public void readToVector(int readNumber,
                         org.apache.flink.table.data.columnar.vector.writable.WritableColumnVector vector)
                  throws IOException

Specified by:

readToVector in interface org.apache.flink.formats.parquet.vector.reader.ColumnReader<org.apache.flink.table.data.columnar.vector.writable.WritableColumnVector>

Throws:

IOException