Package 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:

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    canEqual(Object obj)
     
    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.
    org.apache.flink.table.types.logical.LogicalType[]
    toRowFieldTypes()
    Deprecated.
    TypeInformation should just be a thin wrapper of a serializer.
    RowDataSerializer
    toRowSerializer()
     
    int
    toRowSize()
    Deprecated.
    TypeInformation should just be a thin wrapper of a serializer.
    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 Details

    • 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)
      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>