Note: Built-In Function Rules Usage Options
From a nominated base file name this facility returns to the caller a list of all related files.
Functionally this Built-In Function acts like the first step of the application template command @@GET_FILS in that from a nominated base file name it returns a list of files.
In a template, the command displays the resulting list to the user for selection. However, the Built-In Function version returns to the list the calling RDML function.
In an application template the user selects files by entering a non-blank value beside them at the workstation. To perform this action from an RDML function use the TEMPLATE_@@SET_FILS Built-In Function.
This Built-In Function can only be used against a function that has been previously placed into an edit session by using the START_FUNCTION_EDIT Built-In Function.
Please Note: This Built-In Function has considerably more power than its online template equivalent @@GET_FILS.
The basic difference is in the ability of this function to extract a much more comprehensive file access route list. The online version prevents the extraction of the same underlying physical file more than once in the complete file list. However this Built-In Functions relaxes this rule so that the same underlying physical file cannot be used more than once in any single access route "chain" or "path" starting from, and including, the base file.
Obviously this limit must be imposed to prevent "closed circuits" or "infinite loops" within the access route "chain" or "path".
It is strongly recommended that any developer who plans to use this function design a simple test function using this Built-In Function to extract and display the resulting file list from a nominated base file. This way the characteristics of this function can be much more easily examined and understood.
Special Note: This Built-In Function provides access to very advanced facilities that basically allow RDML functions to construct new RDML functions.
This is a very specialized area that requires very good knowledge of the LANSA product. Use of this Built-In Function in a "commercial" application (e.g. Order Entry) is not normal and should not be attempted.
This is a Specialized Built-In Function for use in a Development Environment only.
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