org.apache.drill.exec.record.metadata

Class DictColumnMetadata

java.lang.Object

org.apache.drill.exec.record.metadata.AbstractPropertied

org.apache.drill.exec.record.metadata.AbstractColumnMetadata

org.apache.drill.exec.record.metadata.AbstractMapColumnMetadata

org.apache.drill.exec.record.metadata.DictColumnMetadata

All Implemented Interfaces:

ColumnMetadata, Propertied

public class DictColumnMetadata
extends AbstractMapColumnMetadata

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.drill.exec.record.metadata.ColumnMetadata

ColumnMetadata.StructureType

Field Summary

Fields inherited from class org.apache.drill.exec.record.metadata.AbstractMapColumnMetadata

parentTuple, schema

Fields inherited from class org.apache.drill.exec.record.metadata.AbstractColumnMetadata

mode, name, precision, scale, type

Fields inherited from interface org.apache.drill.exec.record.metadata.ColumnMetadata

BLANK_AS_NULL, BLANK_AS_PROP, BLANK_AS_ZERO, DEFAULT_ARRAY_SIZE, DEFAULT_VALUE_PROP, EXCLUDE_FROM_WILDCARD, EXPECTED_CARDINALITY_PROP, EXPECTED_WIDTH_PROP, FORMAT_PROP, IMPLICIT_COL_TYPE, IMPLICIT_FILENAME, IMPLICIT_FILEPATH, IMPLICIT_FQN, IMPLICIT_PARTITION_PREFIX, IMPLICIT_SUFFIX

Fields inherited from interface org.apache.drill.exec.record.metadata.Propertied

DRILL_PROP_PREFIX

Constructor Summary

Constructors

Constructor and Description
DictColumnMetadata(DictColumnMetadata from)
DictColumnMetadata(MaterializedField schema) Build a new dict column from the field provided
DictColumnMetadata(String name, TypeProtos.DataMode mode)

Method Summary

Modifier and Type	Method and Description
ColumnMetadata	cloneEmpty() Create an empty version of this column.
ColumnMetadata	copy()
protected String	internalTypeString() Returns specific type string representation of the type that extends this class.
boolean	isDict()
ColumnMetadata	keyColumnMetadata()
ColumnMetadata.StructureType	structureType()
ColumnMetadata	valueColumnMetadata()

Methods inherited from class org.apache.drill.exec.record.metadata.AbstractMapColumnMetadata

appendContents, bind, emptySchema, expectedWidth, isEquivalent, parentTuple, schema, tupleSchema, typeString

Methods inherited from class org.apache.drill.exec.record.metadata.AbstractColumnMetadata

childSchema, columnString, createColumnMetadata, dateTimeFormatter, decodeDefaultValue, defaultValue, dimensions, equals, equalsWithProperties, equalsWithProperties, escapeSpecialSymbols, expectedElementCount, format, isArray, isDynamic, isMap, isMultiList, isNullable, isVariableWidth, isVariant, majorType, mode, name, precision, properties, scale, setDefaultValue, setExpectedElementCount, setExpectedWidth, setFormat, toString, type, valueFromString, valueToString, variantSchema

Methods inherited from class org.apache.drill.exec.record.metadata.AbstractPropertied

booleanProperty, booleanProperty, hashCode, hasProperties, intProperty, intProperty, property, property, removeProperty, setBooleanProperty, setIntProperty, setProperties, setProperty

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.drill.exec.record.metadata.Propertied

booleanProperty, booleanProperty, hasProperties, intProperty, intProperty, pluginPrefix, property, property, removeProperty, setBooleanProperty, setIntProperty, setProperties, setProperty

Constructor Detail

DictColumnMetadata

public DictColumnMetadata(MaterializedField schema)

Build a new dict column from the field provided

Parameters:

schema - materialized field description of the map

DictColumnMetadata

public DictColumnMetadata(String name,
                          TypeProtos.DataMode mode)

DictColumnMetadata

public DictColumnMetadata(DictColumnMetadata from)

Method Detail

keyColumnMetadata

public ColumnMetadata keyColumnMetadata()

valueColumnMetadata

public ColumnMetadata valueColumnMetadata()

copy

public ColumnMetadata copy()

cloneEmpty

public ColumnMetadata cloneEmpty()

Description copied from interface: ColumnMetadata

Create an empty version of this column. If the column is a scalar, produces a simple copy. If a map, produces a clone without child columns.

Returns:

empty clone of this column

isDict

public boolean isDict()

Specified by:

isDict in interface ColumnMetadata

Overrides:

isDict in class AbstractColumnMetadata

internalTypeString

protected String internalTypeString()

Description copied from class: AbstractMapColumnMetadata

Returns specific type string representation of the type that extends this class.

Specified by:

internalTypeString in class AbstractMapColumnMetadata

Returns:

type string representation

structureType

public ColumnMetadata.StructureType structureType()

Specified by:

structureType in interface ColumnMetadata

Overrides:

structureType in class AbstractMapColumnMetadata