Package io.trino.parquet.reader

Class ListColumnReader

java.lang.Object

io.trino.parquet.reader.ListColumnReader

public final class ListColumnReader
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final record	ListColumnReader.BlockPositions

Method Summary

Modifier and Type	Method	Description
static ListColumnReader.BlockPositions	calculateCollectionOffsets(Field field, int[] definitionLevels, int[] repetitionLevels)	Each collection (Array or Map) has four variants of presence: 1) Collection is not defined, because one of it's optional parent fields is null 2) Collection is null 3) Collection is defined but empty 4) Collection is defined and not empty.

Methods inherited from class java.lang.Object

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

Method Details

calculateCollectionOffsets

public static ListColumnReader.BlockPositions calculateCollectionOffsets(Field field,
 int[] definitionLevels,
 int[] repetitionLevels)

Each collection (Array or Map) has four variants of presence: 1) Collection is not defined, because one of it's optional parent fields is null 2) Collection is null 3) Collection is defined but empty 4) Collection is defined and not empty. In this case offset value is increased by the number of elements in that collection