org.apache.parquet.arrow.schema

Class SchemaMapping

java.lang.Object

org.apache.parquet.arrow.schema.SchemaMapping

public class SchemaMapping
extends Object

The mapping between an Arrow and a Parquet schema

See Also:

SchemaConverter

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SchemaMapping.ListTypeMapping mapping of a List type and standard 3-level List annotated Parquet type
static class	SchemaMapping.MapTypeMapping mapping of a Map type and standard 3-level Map annotated Parquet type
static class	SchemaMapping.PrimitiveTypeMapping mapping between two primitive types
static class	SchemaMapping.RepeatedTypeMapping mapping of a List type and repeated Parquet field (non-list annotated)
static class	SchemaMapping.StructTypeMapping mapping of a struct type
static class	SchemaMapping.TypeMapping Mapping between an Arrow and a Parquet types
static interface	SchemaMapping.TypeMappingVisitor<T> To traverse a schema mapping
static class	SchemaMapping.UnionTypeMapping mapping of a union type

Method Summary

Modifier and Type	Method and Description
org.apache.arrow.vector.types.pojo.Schema	getArrowSchema()
List<SchemaMapping.TypeMapping>	getChildren()
MessageType	getParquetSchema()

Methods inherited from class java.lang.Object

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

Method Detail

getArrowSchema

public org.apache.arrow.vector.types.pojo.Schema getArrowSchema()

getParquetSchema

public MessageType getParquetSchema()

getChildren

public List<SchemaMapping.TypeMapping> getChildren()

Returns:

mapping between individual fields of each of the 2 schemas (should be the same width)