Package org.apache.drill.exec.record.metadata

Class AbstractMapColumnMetadata

java.lang.Object

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

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

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

All Implemented Interfaces:

ColumnMetadata, Propertied

Direct Known Subclasses:

DictColumnMetadata, MapColumnMetadata

public abstract class AbstractMapColumnMetadata
extends AbstractColumnMetadata

Describes a base column type for map, dict, repeated map and repeated dict. All are tuples that have a tuple schema as part of the column definition.

Nested Class Summary

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

ColumnMetadata.StructureType

Field Summary

Fields

Modifier and Type	Field	Description
protected TupleMetadata	parentTuple
protected final TupleSchema	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	Description
AbstractMapColumnMetadata(String name, TypeProtos.MinorType type, TypeProtos.DataMode mode, TupleSchema schema)
AbstractMapColumnMetadata(MaterializedField schema)	Build a new map column from the field provided
AbstractMapColumnMetadata(AbstractMapColumnMetadata from)

Method Summary

Modifier and Type	Method	Description
protected void	appendContents(StringBuilder buf)
void	bind(TupleMetadata parentTuple)
MaterializedField	emptySchema()
int	expectedWidth()	Get the expected width for a column.
protected abstract String	internalTypeString()	Returns specific type string representation of the type that extends this class.
boolean	isEquivalent(ColumnMetadata o)	Report whether one column is equivalent to another.
TupleMetadata	parentTuple()
MaterializedField	schema()
ColumnMetadata.StructureType	structureType()
TupleMetadata	tupleSchema()	Schema for TUPLE columns.
String	typeString()	Converts type metadata into string representation accepted by the table schema parser.

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, isDict, isDynamic, isMap, isMultiList, isNullable, isScalar, 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.ColumnMetadata

cloneEmpty, copy

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

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

Field Details

parentTuple

protected TupleMetadata parentTuple

schema

protected final TupleSchema schema

Constructor Details

AbstractMapColumnMetadata

public AbstractMapColumnMetadata(MaterializedField schema)

Build a new map column from the field provided

Parameters:

schema - materialized field description of the map

AbstractMapColumnMetadata

public AbstractMapColumnMetadata(AbstractMapColumnMetadata from)

AbstractMapColumnMetadata

public AbstractMapColumnMetadata(String name,
 TypeProtos.MinorType type,
 TypeProtos.DataMode mode,
 TupleSchema schema)

Method Details

bind

public void bind(TupleMetadata parentTuple)

Specified by:

bind in interface ColumnMetadata

Overrides:

bind in class AbstractColumnMetadata

structureType

public ColumnMetadata.StructureType structureType()

tupleSchema

public TupleMetadata tupleSchema()

Description copied from interface: ColumnMetadata

Schema for TUPLE columns.

Specified by:

tupleSchema in interface ColumnMetadata

Overrides:

tupleSchema in class AbstractColumnMetadata

Returns:

the tuple schema

expectedWidth

public int expectedWidth()

Description copied from interface: ColumnMetadata

Get the expected width for a column. This is the actual width for fixed- width columns, the specified width (defaulting to 50) for variable-width columns.

Specified by:

expectedWidth in interface ColumnMetadata

Overrides:

expectedWidth in class AbstractColumnMetadata

Returns:

the expected column width of the each data value. Does not include "overhead" space such as for the null-value vector or offset vector

parentTuple

public TupleMetadata parentTuple()

schema

public MaterializedField schema()

emptySchema

public MaterializedField emptySchema()

typeString

public String typeString()

Description copied from interface: ColumnMetadata

Converts type metadata into string representation accepted by the table schema parser.

Specified by:

typeString in interface ColumnMetadata

Specified by:

typeString in class AbstractColumnMetadata

Returns:

type metadata string representation

internalTypeString

protected abstract String internalTypeString()

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

Returns:

type string representation

appendContents

protected void appendContents(StringBuilder buf)

Overrides:

appendContents in class AbstractColumnMetadata

isEquivalent

public boolean isEquivalent(ColumnMetadata o)

Description copied from interface: ColumnMetadata

Report whether one column is equivalent to another. Columns are equivalent if they have the same name, type and structure (ignoring internal structure such as properties.)

Specified by:

isEquivalent in interface ColumnMetadata

Overrides:

isEquivalent in class AbstractColumnMetadata