org.apache.paimon.types

Class MapType

java.lang.Object

org.apache.paimon.types.DataType

org.apache.paimon.types.MapType

All Implemented Interfaces:

Serializable

@Public
public class MapType
extends DataType

Data type of an associative array that maps keys (including NULL) to values (including NULL). A map cannot contain duplicate keys; each key can map to at most one value. There is no restriction of key types; it is the responsibility of the user to ensure uniqueness. The map type is an extension to the SQL standard.

Since:

0.4.0

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	FORMAT

Constructor Summary

Constructors

Constructor and Description
MapType(boolean isNullable, DataType keyType, DataType valueType)
MapType(DataType keyType, DataType valueType)

Method Summary

Modifier and Type	Method and Description
<R> R	accept(DataTypeVisitor<R> visitor)
String	asSQLString() Returns a string that summarizes this type as SQL standard string for printing to a console.
void	collectFieldIds(Set<Integer> fieldIds)
DataType	copy(boolean isNullable) Returns a deep copy of this type with possibly different nullability.
boolean	equals(Object o)
DataType	getKeyType()
DataType	getValueType()
int	hashCode()
void	serializeJson(org.apache.paimon.shade.jackson2.com.fasterxml.jackson.core.JsonGenerator generator)

Methods inherited from class org.apache.paimon.types.DataType

copy, equalsIgnoreNullable, getTypeRoot, is, is, isAnyOf, isAnyOf, isNullable, notNull, nullable, toString, withNullability

Methods inherited from class java.lang.Object

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

Field Detail

FORMAT

public static final String FORMAT

See Also:

Constant Field Values

Constructor Detail

MapType

public MapType(boolean isNullable,
               DataType keyType,
               DataType valueType)

MapType

public MapType(DataType keyType,
               DataType valueType)

Method Detail

getKeyType

public DataType getKeyType()

getValueType

public DataType getValueType()

copy

public DataType copy(boolean isNullable)

Description copied from class: DataType

Returns a deep copy of this type with possibly different nullability.

Specified by:

copy in class DataType

Parameters:

isNullable - the intended nullability of the copied type

Returns:

a deep copy

asSQLString

public String asSQLString()

Description copied from class: DataType

Returns a string that summarizes this type as SQL standard string for printing to a console. An implementation might shorten long names or skips very specific properties.

Specified by:

asSQLString in class DataType

serializeJson

public void serializeJson(org.apache.paimon.shade.jackson2.com.fasterxml.jackson.core.JsonGenerator generator)
                   throws IOException

Overrides:

serializeJson in class DataType

Throws:

IOException

equals

public boolean equals(Object o)

Overrides:

equals in class DataType

hashCode

public int hashCode()

Overrides:

hashCode in class DataType

accept

public <R> R accept(DataTypeVisitor<R> visitor)

Specified by:

accept in class DataType

collectFieldIds

public void collectFieldIds(Set<Integer> fieldIds)

Overrides:

collectFieldIds in class DataType