org.apache.flink.table.runtime.typeutils

Class InternalTypeInfo<T>

java.lang.Object

org.apache.flink.api.common.typeinfo.TypeInformation<T>

org.apache.flink.table.runtime.typeutils.InternalTypeInfo<T>

Type Parameters:

T - internal data structure

All Implemented Interfaces:

Serializable, org.apache.flink.table.types.DataTypeQueryable

@Internal
public final class InternalTypeInfo<T>
extends org.apache.flink.api.common.typeinfo.TypeInformation<T>
implements org.apache.flink.table.types.DataTypeQueryable

Type information that wraps a serializer that originated from a LogicalType.

TypeInformation is a legacy class for the sole purpose of creating a TypeSerializer. Instances of TypeInformation are not required in the table ecosystem but sometimes enforced by interfaces of other modules (such as Transformation). Therefore, this class acts as an adapter whenever type information is required.

Use of(LogicalType) for type information of internal data structures.

Note: Instances of this class should only be created for passing it to interfaces that require type information. This class should not be used as a replacement for a LogicalType. Information such as the arity of a row type, field types, field names, etc. should be derived from the LogicalType directly.

The original LogicalType is stored in every instance (for access during pre-flight phase and planning) but has no effect on equality because only serialization matters during runtime.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
boolean	canEqual(Object obj)
org.apache.flink.api.common.typeutils.TypeSerializer<T>	createSerializer(org.apache.flink.api.common.ExecutionConfig config)
org.apache.flink.api.common.typeutils.TypeSerializer<T>	createSerializer(org.apache.flink.api.common.serialization.SerializerConfig config)
boolean	equals(Object o)
int	getArity()
org.apache.flink.table.types.DataType	getDataType()
int	getTotalFields()
Class<T>	getTypeClass()
int	hashCode()
boolean	isBasicType()
boolean	isKeyType()
boolean	isTupleType()
static <T> InternalTypeInfo<T>	of(org.apache.flink.table.types.logical.LogicalType type) Creates type information for a LogicalType that is represented by internal data structures.
static InternalTypeInfo<org.apache.flink.table.data.RowData>	of(org.apache.flink.table.types.logical.RowType type) Creates type information for a RowType represented by internal data structures.
static InternalTypeInfo<org.apache.flink.table.data.RowData>	ofFields(org.apache.flink.table.types.logical.LogicalType... fieldTypes) Creates type information for RowType represented by internal data structures.
static InternalTypeInfo<org.apache.flink.table.data.RowData>	ofFields(org.apache.flink.table.types.logical.LogicalType[] fieldTypes, String[] fieldNames) Creates type information for RowType represented by internal data structures.
org.apache.flink.table.types.logical.LogicalType	toLogicalType()
String[]	toRowFieldNames() Deprecated. TypeInformation should just be a thin wrapper of a serializer. This method only exists for legacy code. It is recommended to use the RowType instead for logical operations.
org.apache.flink.table.types.logical.LogicalType[]	toRowFieldTypes() Deprecated. TypeInformation should just be a thin wrapper of a serializer. This method only exists for legacy code. It is recommended to use the RowType instead for logical operations.
RowDataSerializer	toRowSerializer()
int	toRowSize() Deprecated. TypeInformation should just be a thin wrapper of a serializer. This method only exists for legacy code. It is recommended to use the RowType instead for logical operations.
org.apache.flink.table.types.logical.RowType	toRowType()
org.apache.flink.api.common.typeutils.TypeSerializer<T>	toSerializer()
String	toString()

Methods inherited from class org.apache.flink.api.common.typeinfo.TypeInformation

getGenericParameters, isSortKeyType, of, of

Methods inherited from class java.lang.Object

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

Method Detail

of

public static <T> InternalTypeInfo<T> of(org.apache.flink.table.types.logical.LogicalType type)

Creates type information for a LogicalType that is represented by internal data structures.

of

public static InternalTypeInfo<org.apache.flink.table.data.RowData> of(org.apache.flink.table.types.logical.RowType type)

Creates type information for a RowType represented by internal data structures.

ofFields

public static InternalTypeInfo<org.apache.flink.table.data.RowData> ofFields(org.apache.flink.table.types.logical.LogicalType... fieldTypes)

Creates type information for RowType represented by internal data structures.

ofFields

public static InternalTypeInfo<org.apache.flink.table.data.RowData> ofFields(org.apache.flink.table.types.logical.LogicalType[] fieldTypes,
                                                                             String[] fieldNames)

Creates type information for RowType represented by internal data structures.

toLogicalType

public org.apache.flink.table.types.logical.LogicalType toLogicalType()

toSerializer

public org.apache.flink.api.common.typeutils.TypeSerializer<T> toSerializer()

toRowType

public org.apache.flink.table.types.logical.RowType toRowType()

toRowSerializer

public RowDataSerializer toRowSerializer()

toRowFieldTypes

@Deprecated
public org.apache.flink.table.types.logical.LogicalType[] toRowFieldTypes()

Deprecated. TypeInformation should just be a thin wrapper of a serializer. This method only exists for legacy code. It is recommended to use the RowType instead for logical operations.

toRowFieldNames

@Deprecated
public String[] toRowFieldNames()

Deprecated. TypeInformation should just be a thin wrapper of a serializer. This method only exists for legacy code. It is recommended to use the RowType instead for logical operations.

toRowSize

@Deprecated
public int toRowSize()

Deprecated. TypeInformation should just be a thin wrapper of a serializer. This method only exists for legacy code. It is recommended to use the RowType instead for logical operations.

getDataType

public org.apache.flink.table.types.DataType getDataType()

Specified by:

getDataType in interface org.apache.flink.table.types.DataTypeQueryable

isBasicType

public boolean isBasicType()

Specified by:

isBasicType in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

isTupleType

public boolean isTupleType()

Specified by:

isTupleType in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

getArity

public int getArity()

Specified by:

getArity in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

getTotalFields

public int getTotalFields()

Specified by:

getTotalFields in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

getTypeClass

public Class<T> getTypeClass()

Specified by:

getTypeClass in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

isKeyType

public boolean isKeyType()

Specified by:

isKeyType in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

createSerializer

public org.apache.flink.api.common.typeutils.TypeSerializer<T> createSerializer(org.apache.flink.api.common.serialization.SerializerConfig config)

Overrides:

createSerializer in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

createSerializer

public org.apache.flink.api.common.typeutils.TypeSerializer<T> createSerializer(org.apache.flink.api.common.ExecutionConfig config)

Specified by:

createSerializer in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

toString

public String toString()

Specified by:

toString in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

equals

public boolean equals(Object o)

Specified by:

equals in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

hashCode

public int hashCode()

Specified by:

hashCode in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

canEqual

public boolean canEqual(Object obj)

Specified by:

canEqual in class org.apache.flink.api.common.typeinfo.TypeInformation<T>