If you attempt to edit a compiled program (using the EDIT command), a message is issued, warning you that the program has been compiled. Knowing that a program you are modifying has been compiled enables you to choose whether to re-compile it or to run the uncompiled version. You must choose one of these alternatives…
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You can use one of the following methods to determine if a program has been compiled: Use the $compilestatus function to check the compilation status of the program. Run the Object Browser ( ZXLISTER) administrative utility. Any application document containing a compiled program shows a “-c” suffix following the file name. Attempt to use the…
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You can recompile an application program at any time. Recompiling replaces the existing compiled version of the program with a new compiled version. Recompiling is necessary if a compiled program becomes invalid for one of the following reasons: The source version of the program has been updated. Changes to the source program are not automatically…
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Source and compiled programs sometimes behave in different ways, particularly in how they treat certain objects. Special considerations apply both to permanent objects and to temporary objects (i.e., temporary result sets).
Within programs that are to be compiled, references to result sets (created by set-processing commands) require special care. References to result sets can create problems, because the order in which the Compiler processes a program could be different from the order of execution. Problems can be avoided by creating permanent result sets (set objects) in…
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Most problems with references to named sets can be alleviated by adhering to the following guidelines: Qualify set operations by explicitly giving the set name where possible (e.g., next set1, top set1) rather than letting the software implicitly assume the current set. Declare set objects in the database, forcing the software to check the structure…
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The Compiler works from top to bottom through a program, reading every command line and disregarding programming structures and the flow-of-control commands (such as IF&ldots;ENDIF, WHILE&ldots;ENDWHILE, BREAT, CONTINUE, RETURN, STOP, and BYE). During compilation, the software creates a result set for every set-processing command that implicitly or explicitly produces a result set. For example, compilation…
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The examples that follow illustrate how result set references are compiled and indicate situations to be avoided. Example 1 procedure test() find all Employees -> EmpSet . . . other non-FIND commands . . . find all Departments -> DeptSet . . . other non-FIND commands . . .endprocedure This procedure contains two set-processing commands that create result…
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In the context of compiled programs, the term permanent object refers to any object that, once created in the application database (based on a definition in the Object Dictionary), persists until erased. Permanent objects include EntitySets, relationships, roles, application documents, application directories, windows, menus, displays, forms, constants, variables, and permanent result sets (set objects). Application…
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With a few exceptions, all Zim application programs can be compiled. Compiling one or more programs in an application carries several benefits, including security, speed of execution, and minimized resource use. This section discusses the compiler, prerequisites for compiling programs, adjustments to be made to application programs before compiling, and the commands used to compile…
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