Class ViewManager


  • public class ViewManager
    extends java.lang.Object
    A DatabaseConnection view manager. This controls adding, updating, deleting, and processing views inside the system view table.
    Author:
    Tobias Downer
    • Method Detail

      • viewExists

        public boolean viewExists​(TableName view_name)
        Returns true if the view with the given name exists.
      • defineView

        public void defineView​(ViewDef view,
                               SQLQuery query,
                               User user)
                        throws DatabaseException
        Defines a view. If the view with the name has not been defined it is defined. If the view has been defined then it is overwritten with this information.
        Parameters:
        view - information that defines the view.
        query - the query that forms the view.
        user - the user that owns this view being defined.
        Throws:
        DatabaseException
      • deleteView

        public boolean deleteView​(TableName view_name)
                           throws DatabaseException
        Deletes the view with the given name, or returns false if no entries were deleted from the view table.
        Throws:
        DatabaseException
      • createViewQueryPlanNode

        public QueryPlanNode createViewQueryPlanNode​(TableName view_name)
        Returns a freshly deserialized QueryPlanNode object for the given view object.