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

Class VariantColumnMetadata

java.lang.Object

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

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

org.apache.drill.exec.record.metadata.VariantColumnMetadata

All Implemented Interfaces:

ColumnMetadata, Propertied

public class VariantColumnMetadata
extends AbstractColumnMetadata

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.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
VariantColumnMetadata(MaterializedField schema)
VariantColumnMetadata(MaterializedField schema, VariantSchema variantSchema)

Method Summary

Modifier and Type	Method	Description
protected void	appendContents(StringBuilder buf)
ColumnMetadata	cloneEmpty()	Create an empty version of this column.
ColumnMetadata	copy()
MaterializedField	emptySchema()
boolean	isArray()
boolean	isEquivalent(ColumnMetadata o)	Report whether one column is equivalent to another.
boolean	isVariant()
static VariantColumnMetadata	list(String name)
static VariantColumnMetadata	listOf(String name, VariantSchema variantSchema)
MaterializedField	schema()
ColumnMetadata.StructureType	structureType()
String	typeString()	Converts type metadata into string representation accepted by the table schema parser.
static VariantColumnMetadata	union(String name)
static VariantColumnMetadata	unionOf(String name, VariantSchema variantSchema)
static VariantColumnMetadata	unionOf(MaterializedField schema, VariantSchema variantSchema)
static VariantColumnMetadata	variantOf(String name, TypeProtos.MinorType type, VariantSchema variantSchema)
VariantMetadata	variantSchema()	Schema for VARIANT columns.

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

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

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, property, property, removeProperty, setBooleanProperty, setIntProperty, setProperties, setProperty

Constructor Details

VariantColumnMetadata

public VariantColumnMetadata(MaterializedField schema)

VariantColumnMetadata

public VariantColumnMetadata(MaterializedField schema,
 VariantSchema variantSchema)

Method Details

union

public static VariantColumnMetadata union(String name)

unionOf

public static VariantColumnMetadata unionOf(String name,
 VariantSchema variantSchema)

unionOf

public static VariantColumnMetadata unionOf(MaterializedField schema,
 VariantSchema variantSchema)

list

public static VariantColumnMetadata list(String name)

listOf

public static VariantColumnMetadata listOf(String name,
 VariantSchema variantSchema)

variantOf

public static VariantColumnMetadata variantOf(String name,
 TypeProtos.MinorType type,
 VariantSchema variantSchema)

structureType

public ColumnMetadata.StructureType structureType()

isVariant

public boolean isVariant()

Specified by:

isVariant in interface ColumnMetadata

Overrides:

isVariant in class AbstractColumnMetadata

isArray

public boolean isArray()

Specified by:

isArray in interface ColumnMetadata

Overrides:

isArray in class AbstractColumnMetadata

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

copy

public ColumnMetadata copy()

variantSchema

public VariantMetadata variantSchema()

Description copied from interface: ColumnMetadata

Schema for VARIANT columns.

Specified by:

variantSchema in interface ColumnMetadata

Overrides:

variantSchema in class AbstractColumnMetadata

Returns:

the variant schema

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

schema

public MaterializedField schema()

emptySchema

public MaterializedField emptySchema()

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