Programming Guide - Actian

BitmapObject classThe BitmapObject class provides attributes and methods that enable you tomanipulate the images displayed in an image field.castingCasting involves making the system class of a generic object explicit.collectionA collection is an object that contains a group of related objects.commandA command is an operation that you execute from an OpenROAD menu or atthe operating system level.concurrency controlConcurrency control refers to the management of shared data so thatsimultaneous users can access and update the data with little or no wait timewhile data integrity is maintained.cursordata entry error handlerdatabase eventdatabase procedureA cursor is a row marker that designates an individual row in the selectstatement's result table (the set of rows returned by a non-singleton select).A data entry error handler is a global or local procedure written in 4GL thatgains control as a result of a user typing invalid data into an entry field. Theerror condition is detected when the entry field loses input focus, or theGetFieldValue method is executed on the entry field.Database events are user-defined events. They are created and manipulatedusing SQL statements and stored in a database. Database events are a way fortwo programs that are connected to the same database to communicate.A database procedure is a data-oriented procedure stored in the database andexecuted within the database server that you can call by name in a script or4GL procedure. Database procedures are often used to increase performanceand help ensure data integrity and consistency.492 Programming Guide