org.apache.paimon.format.parquet.reader

类 ParquetDataColumnReaderFactory

java.lang.Object

org.apache.paimon.format.parquet.reader.ParquetDataColumnReaderFactory

public final class ParquetDataColumnReaderFactory
extends Object

Parquet file has self-describing schema which may differ from the user required schema (e.g. schema evolution). This factory is used to retrieve user required typed data via corresponding reader which reads the underlying data. Part of the code is referred from Apache Hive.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	ParquetDataColumnReaderFactory.DefaultParquetDataColumnReader The default data column reader for existing Parquet page reader which works for both dictionary or non dictionary types, Mirror from dictionary encoding path.
static class	ParquetDataColumnReaderFactory.TypesFromInt96PageReader The reader who reads from the underlying Timestamp value.

方法概要

限定符和类型	方法和说明
static ParquetDataColumnReader	getDataColumnReaderByType(org.apache.parquet.schema.PrimitiveType parquetType, org.apache.parquet.column.values.ValuesReader realReader, boolean isUtcTimestamp)
static ParquetDataColumnReader	getDataColumnReaderByTypeOnDictionary(org.apache.parquet.schema.PrimitiveType parquetType, org.apache.parquet.column.Dictionary realReader, boolean isUtcTimestamp)

从类继承的方法 java.lang.Object

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

方法详细资料

getDataColumnReaderByTypeOnDictionary

public static ParquetDataColumnReader getDataColumnReaderByTypeOnDictionary(org.apache.parquet.schema.PrimitiveType parquetType,
                                                                            org.apache.parquet.column.Dictionary realReader,
                                                                            boolean isUtcTimestamp)

getDataColumnReaderByType

public static ParquetDataColumnReader getDataColumnReaderByType(org.apache.parquet.schema.PrimitiveType parquetType,
                                                                org.apache.parquet.column.values.ValuesReader realReader,
                                                                boolean isUtcTimestamp)