4.2.15 I-O-CONTROL Paragraph
The I-O-CONTROL paragraph of the Input-Output Section specifies when checkpoints are to be taken and the storage areas to be shared by different files. This paragraph is optional in a COBOL program.
The key word I-O-CONTROL can appear only once, at the beginning of the paragraph. The word I-O-CONTROL must begin in Area A, and must be followed by a separator period.
Each clause within the paragraph can be separated from the next by a separator comma or a separator semicolon. The order in which I-O-CONTROL paragraph clauses are written is not significant. The I-O-CONTROL paragraph ends with a separator period.
___ Sequential I-O-Control Entries _______________________________________________________________
| |
| (1) |
| >>__ _RERUN__ON_____ _assignment-name-1_ __ _______ __| phrase 1 |_______________________ ____>< |
| | |_file-name-1_______| |_EVERY_| | |
| | <________________ | |
| | (2)| | |
| |_SAME__ ________ __ ______ __ _____ __file-name-3____file-name-4____|_______________| |
| | |_RECORD_| |_AREA_| |_FOR_| | |
| | (3) <______________________________________ | |
| |_MULTIPLE FILE_____ ______ __ __________ ____file-name-5__ _____________________ _|_| |
| | |_TAPE_| |_CONTAINS_| |_POSITION__integer-2_| | |
| | (3) <_______________ | |
| |_ APPLY WRITE-ONLY _____ ______ ____ file-name-2 _|_________________________________| |
| |_ ON _| |
| |
| phrase 1: |
| |__ _integer-1__RECORDS____ __ ____ __file-name-1______________________________________________| |
| |_END__ ____ __ _REEL_ _| |_OF_| |
| |_OF_| |_UNIT_| |
| |
| Notes: |
X | (1) ON is optional as an IBM extension. |
| |
X | (2) File-name-4 is optional as an IBM extension. |
| |
X | (3) The MULTIPLE FILE clause and APPLY WRITE-ONLY clause are not supported for OS/390 VSAM |
| files and are treated as comments on AIX, OS/2, and Windows. |
| |
|__________________________________________________________________________________________________|
___ Relative and Indexed I-O-Control Entries ______________________________________
| |
| (1) |
| >>__ _RERUN__ON_____ _assignment-name-1_ __ _______ __| phrase 1 |_________ ___>< |
| | |_file-name-1_______| |_EVERY_| | |
| | <________________ | |
| | (2)| | |
| |_SAME__ ________ __ ______ __ _____ __file-name-3____file-name-4____|_| |
| |_RECORD_| |_AREA_| |_FOR_| |
| |
| phrase 1: |
| |__integer-1__RECORDS__ ____ __file-name-1______________________________________| |
| |_OF_| |
| |
| Notes: |
X | (1) ON is optional as an IBM extension. |
| |
X | (2) File-name-4 is optional as an IBM extension. |
| |
|___________________________________________________________________________________|
X ___ Line Sequential I-O-Control Entries (Workstation Only) ________________________ X | | X | <_____________ | X | >>____SAME__ ________ __ ______ __ _____ __file-name-3____file-name-4_|________>< | X | |_RECORD_| |_AREA_| |_FOR_| | | | |___________________________________________________________________________________|
___ Sort Merge I-O-Control Entries (OS/390 and VM Only) ________________
| |
| >>__ ________________________________________ _______________________> |
| |_ RERUN __ ______ __ assignment-name-1 _| |
| |_ ON _| |
| |
| <_______________________________________________________ |
| >____SAME__ _RECORD_____ __ ______ __ _____ __| phrase 1 |_|________>< |
| |_SORT_______| |_AREA_| |_FOR_| |
| |_SORT-MERGE_| |
| |
| phrase 1: |
| <________________ |
| (1)| |
| |__file-name-3____file-name-4____|___________________________________| |
| |
| Note: |
X | (1) File-name-4 is optional as an IBM extension. |
| |
|________________________________________________________________________|
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