Class CharConstantNode

    • 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
      • 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.