File Processing
File processing in Encore RPG is no different than in RPG/400. Extensions to incorporate client/server processing have been added in the DCLDISKFILE statement. An application can dynamically open and process database files and members from specific databases defined at run-time. The database, file and member can be defined as variables.
DBDESC & FILEDESC - Because the file name (FileName) is a variable, the compiler must be provided the name of the file and its database paths where the file description is located. The DBDESC and FILEDESC parameter values must be literals.
DB - Database name is the variable into which the application will identify the database location of the file before opening the file. Values may be *NONE (defaults to *LOCALDFT), *SYSDFT (defaults to *REMOTEDFT), a literal database name, or a variable database name identifying the client/workstation Acceler8DB database, server Acceler8DB database or AS/400 database name.
FILE - File name is the variable into which the application will identify the file’s path before opening the file.
MBR - Member name is the variable into which the application will identify the file member before opening the file.
Various sources are available to the program to acquire the file name.
DCLPLIST - The file, member and database names may be passed as a parameter in the program startup command line. For example: C:\MyProg.exe “ProdLib/SalesHist” Sales1990 *REMOTEDFT
Data - The names may originate as data from another file.
User - The names may originate from a user entry or as a selection from a Subfile, OptionButton, Check Box, ListBox or ComboBox.