Field Detail

• singleInstantiation

  private boolean singleInstantiation

• delimitedIdentifier

  private boolean delimitedIdentifier

• isBuiltinVTI

  private boolean isBuiltinVTI

Constructor Detail

• NewInvocationNode

  NewInvocationNode​(java.lang.String javaClassName,
                    java.util.List<ValueNode> params,
                    boolean delimitedIdentifier,
                    ContextManager cm)
             throws StandardException

  Constructor for a NewInvocationNode. Parameters are:

  Parameters:

  javaClassName - The full package.class name of the class

  params - The parameter list for the constructor

  delimitedIdentifier -

  cm - The context manager

  Throws:

  StandardException - Thrown on error

• NewInvocationNode

  NewInvocationNode​(TableName vtiTableFuncName,
                    TableDescriptor tableDescriptor,
                    java.util.List<ValueNode> params,
                    boolean delimitedIdentifier,
                    ContextManager cm)
             throws StandardException

  Throws:

  StandardException

Method Detail

• isBuiltinVTI

  boolean isBuiltinVTI()

  Report whether this node represents a builtin VTI.

• setSingleInstantiation

  void setSingleInstantiation()

  Mark this node as only needing to to a single instantiation. (We can reuse the object after newing it.)

• bindExpression

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

  Bind this expression. This means binding the sub-expressions, as well as figuring out what the return type is for this expression.

  Specified by:

  bindExpression in class JavaValueNode

  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:

  Nothing

  Throws:

  StandardException - Thrown on error

  See Also:

  ValueNode.bindExpression(org.apache.derby.impl.sql.compile.FromList, org.apache.derby.impl.sql.compile.SubqueryList, java.util.List<org.apache.derby.impl.sql.compile.AggregateNode>)

• categorize

  boolean categorize​(JBitSet referencedTabs,
                     boolean simplePredsOnly)
              throws StandardException

  Categorize this predicate. Initially, this means building a bit map of the referenced tables for each predicate. If the source of this ColumnReference (at the next underlying level) is not a ColumnReference or a VirtualColumnNode then this predicate will not be pushed down. For example, in: select * from (select 1 from s) a (x) where x = 1 we will not push down x = 1. NOTE: It would be easy to handle the case of a constant, but if the inner SELECT returns an arbitrary expression, then we would have to copy that tree into the pushed predicate, and that tree could contain subqueries and method calls. RESOLVE - revisit this issue once we have views.

  Overrides:

  categorize in class MethodCallNode

  Parameters:

  referencedTabs - JBitSet with bit map of referenced FromTables

  simplePredsOnly - Whether or not to consider method calls, field references and conditional nodes when building bit map

  Returns:

  boolean Whether or not source.expression is a ColumnReference or a VirtualColumnNode.

  Throws:

  StandardException - Thrown on error

  See Also:

  ValueNode.categorize(org.apache.derby.iapi.util.JBitSet, boolean)

• assignableTo

  protected boolean assignableTo​(java.lang.String toClassName)
                          throws StandardException

  Is this class assignable to the specified class? This is useful for the VTI interface where we want to see if the class implements java.sql.ResultSet.

  Parameters:

  toClassName - The java class name we want to assign to

  Returns:

  boolean Whether or not this class is assignable to the specified class

  Throws:

  StandardException - Thrown on error

• findPublicMethod

  protected java.lang.reflect.Member findPublicMethod​(java.lang.String methodName,
                                                      boolean staticMethod)
                                               throws StandardException

  Is this class have a public method with the specified signiture This is useful for the VTI interface where we want to see if the class has the option static method for returning the ResultSetMetaData.

  Parameters:

  methodName - The method name we are looking for

  staticMethod - Whether or not the method we are looking for is static

  Returns:

  Member The Member representing the method (or null if the method doesn't exist).

  Throws:

  StandardException - Thrown on error

• generateExpression

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

  Do code generation for this method call

  Specified by:

  generateExpression in class JavaValueNode

  Parameters:

  acb - The ExpressionClassBuilder for the class we're generating

  mb - The method the expression will go into

  Throws:

  StandardException - Thrown on error