org.apache.drill.exec.vector.accessor

Interface DictWriter

All Superinterfaces:

ArrayWriter, ColumnWriter

All Known Implementing Classes:

DummyDictWriter, ObjectDictWriter

public interface DictWriter
extends ArrayWriter

Physically the writer is an array writer with special tuple writer as its element. Its ColumnWriter.type() returns ARRAY and ArrayWriter.entryType() returns TUPLE. To know whether it is a Dict logically, one may use schema().isDict().

See Also:

DictEntryWriter, ObjectDictWriter, DictVector

Method Summary

Modifier and Type	Method and Description
ValueType	keyType() Returns scalar type of the key field.
ScalarWriter	keyWriter() Returns the writer associated with key field.
ObjectType	valueType() Returns object type of the value field.
ObjectWriter	valueWriter() Returns the writer associated with value field.

Methods inherited from interface org.apache.drill.exec.vector.accessor.ArrayWriter

array, dict, entry, entryType, save, scalar, setNull, size, tuple, variant

Methods inherited from interface org.apache.drill.exec.vector.accessor.ColumnWriter

copy, isProjected, nullable, schema, setNull, setObject, type

Method Detail

keyType

ValueType keyType()

Returns scalar type of the key field.

Returns:

type of the key

valueType

ObjectType valueType()

Returns object type of the value field.

Returns:

type of the value

keyWriter

ScalarWriter keyWriter()

Returns the writer associated with key field.

Returns:

key writer

valueWriter

ObjectWriter valueWriter()

Returns the writer associated with value field.

Returns:

value writer