Writing Programs That Use Transaction Files
Typically, you use a TRANSACTION file to read one record from or write
one record to a display. To use a TRANSACTION file in an ILE COBOL program, you
must:
- Name the file through a file control entry in the FILE-CONTROL paragraph
of the Environment Division
- Describe the file through a file description entry in the Data Division
- Use extensions to Procedure Division statements that support transaction
processing.
Note:
Using extended ACCEPT/DISPLAY statements and TRANSACTION
files in the same program is not recommended. If extended ACCEPT/DISPLAY statements
are used in the same program as TRANSACTION files, then the TRANSACTION file
should be closed when the extended ACCEPT/DISPLAY statements are performed.
Unpredictable results will occur if an extended ACCEPT/DISPLAY statement is
performed when a TRANSACTION file is open. A severe error may be generated
or data on the workstation may be overlapped or intermixed.
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