Field Detail

• K_CHAR

  static final int K_CHAR

  See Also:

  Constant Field Values

• K_VARCHAR

  static final int K_VARCHAR

  See Also:

  Constant Field Values

• K_LONGVARCHAR

  static final int K_LONGVARCHAR

  See Also:

  Constant Field Values

• K_CLOB

  static final int K_CLOB

  See Also:

  Constant Field Values

• kind

  final int kind

  This class is used to hold logically different objects for space efficiency. kind represents the logical object type. See also ValueNode.isSameNodeKind(org.apache.derby.impl.sql.compile.ValueNode).

Constructor Detail

• CharConstantNode

  CharConstantNode​(java.lang.String value,
                   ContextManager cm)
            throws StandardException

  Throws:

  StandardException

• CharConstantNode

  CharConstantNode​(TypeId t,
                   ContextManager cm)
            throws StandardException

  Throws:

  StandardException

• CharConstantNode

  CharConstantNode​(int kind,
                   TypeId t,
                   ContextManager cm)
            throws StandardException

  Parameters:

  kind - The node kind

  t - The type id

  cm - The context manager

  Throws:

  StandardException

• CharConstantNode

  CharConstantNode​(java.lang.String newValue,
                   int newLength,
                   ContextManager cm)
            throws StandardException

  Constructor for a CharConstantNode of a specific length.

  Parameters:

  newValue - A String containing the value of the constant

  newLength - The length of the new value of the constant

  cm -

  Throws:

  StandardException

Method Detail

• getString

  java.lang.String getString()
                      throws StandardException

  Return the value from this CharConstantNode

  Returns:

  The value of this CharConstantNode.

  Throws:

  StandardException - Thrown on error

• getConstantValueAsObject

  java.lang.Object getConstantValueAsObject()
                                     throws StandardException

  Return an Object representing the bind time value of this expression tree. If the expression tree does not evaluate to a constant at bind time then we return null. This is useful for bind time resolution of VTIs. RESOLVE: What do we do for primitives?

  Overrides:

  getConstantValueAsObject in class ValueNode

  Returns:

  An Object representing the bind time value of this expression tree. (null if not a bind time constant.)

  Throws:

  StandardException - Thrown on error

• bindExpression

  ValueNode bindExpression​(FromList fromList,
                           SubqueryList subqueryList,
                           java.util.List<AggregateNode> aggregates)
                    throws StandardException

  Description copied from class: ConstantNode
  Bind this expression. This means binding the sub-expressions, as well as figuring out what the return type is for this expression. In this case, there are no sub-expressions, and the return type is already known, so this is just a stub.

  Overrides:

  bindExpression in class ConstantNode

  Parameters:

  fromList - The FROM list for the query this expression is in, for binding columns.

  subqueryList - The subquery list being built as we find SubqueryNodes

  aggregates - The aggregate list being built as we find AggregateNodes

  Returns:

  The new top of the expression tree.

  Throws:

  StandardException - Thrown on error. Although this class doesn't throw this exception, it's subclasses do and hence this method signature here needs to have throws StandardException

• generateConstant

  void generateConstant​(ExpressionClassBuilder acb,
                        MethodBuilder mb)
                 throws StandardException

  This generates the proper constant. It is implemented by every specific constant node (e.g. IntConstantNode).

  Specified by:

  generateConstant in class ConstantNode

  Parameters:

  acb - The ExpressionClassBuilder for the class being built

  mb - The method the code to place the code

  Throws:

  StandardException - Thrown on error

• isSameNodeKind

  boolean isSameNodeKind​(ValueNode o)

  Description copied from class: ValueNode
  Some node classes represent several logical node types (to reduce footprint), which we call kinds. This means that implementations of ValueNode.isEquivalent(org.apache.derby.impl.sql.compile.ValueNode) cannot always just use instanceof to check if the other node represents the same kind. Hence this method needs to be overridden by all node classes that represent several kinds. This default implementation does not look at kinds. It is only called from implementations of isEquivalent.

  Overrides:

  isSameNodeKind in class ValueNode

  Parameters:

  o - The other value node whose kind we want to compare with.

  Returns:

  true if this and o represent the same logical node type, i.e. kind.