Class AggregateAliasInfo

java.lang.Object
org.apache.derby.catalog.types.AggregateAliasInfo
All Implemented Interfaces:
Externalizable, Serializable, AliasInfo, Formatable, TypedFormat
public class AggregateAliasInfo extends Object implements AliasInfo, Formatable
Describe a G (Aggregate) alias. The AggregateAliasInfo maintains a version stamp so that it can evolve its persistent form over time.
See Also:

  • Field Details

    • FIRST_VERSION

      private static final int FIRST_VERSION
      ////////////////////////////////////////////////////////////////////////////////
      See Also:

    • _forType

      private TypeDescriptor _forType
      ////////////////////////////////////////////////////////////////////////////////

    • _returnType

      private TypeDescriptor _returnType

  • Constructor Details

    • AggregateAliasInfo

      public AggregateAliasInfo()
      no-arg constructor for Formatable machinery

    • AggregateAliasInfo

      public AggregateAliasInfo(TypeDescriptor forType, TypeDescriptor returnType)
      Construct from pieces

  • Method Details

    • isTableFunction

      public boolean isTableFunction()
      ////////////////////////////////////////////////////////////////////////////////
      Specified by:
      isTableFunction in interface AliasInfo

    • getForType

      public TypeDescriptor getForType()
      ////////////////////////////////////////////////////////////////////////////////

    • getReturnType

      public TypeDescriptor getReturnType()

    • setCollationTypeForAllStringTypes

      public void setCollationTypeForAllStringTypes(int collationType)
      Set the collation type for string input and return types.

    • readExternal

      public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
      Read this object from a stream of stored objects.
      Specified by:
      readExternal in interface Externalizable
      Parameters:
      in - read this.
      Throws:
      IOException - thrown on error
      ClassNotFoundException - thrown on error

    • writeExternal

      public void writeExternal(ObjectOutput out) throws IOException
      Write this object to a stream of stored objects.
      Specified by:
      writeExternal in interface Externalizable
      Parameters:
      out - write bytes here.
      Throws:
      IOException - thrown on error

    • getTypeFormatId

      public int getTypeFormatId()
      Get the formatID which corresponds to this class.
      Specified by:
      getTypeFormatId in interface TypedFormat
      Returns:
      the formatID of this class

    • toString

      public String toString()
      This is used by dblook to reconstruct the aggregate-specific parts of the ddl needed to recreate this alias.
      Overrides:
      toString in class Object

    • getMethodName

      public String getMethodName()
      Description copied from interface: AliasInfo
      Get the name of the static method that the alias represents at the source database. (Only meaningful for method aliases )
      Specified by:
      getMethodName in interface AliasInfo
      Returns:
      The name of the static method that the alias represents at the source database.