Table of Contents
- Physical Structure of KEYEDIO Files
- File and KEYEDIO Library Management
- Removing and Installing a KEYEDIO Library
- KEYEDIO Program Interface
- Indexed KEYEDIO File Attributes
- KEYEDIO Procedures
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- Key Information
- File Access Information
- Results Returned
- ISMGETKEYSTRUCTURE Procedure
- ISMOPEN Procedure
- ISMCLOSE Procedure
- ISMSTART Procedure
- ISMSEQUENTIALWRITE Procedure
- ISMSEQUENTIALREAD Procedure
- ISMRANDOMWRITE Procedure
- ISMRANDOMREAD Procedure
- ISMREWRITE Procedure
- ISMDELETE Procedure
- ISMSETUPLIMIT Procedure
- The KEYEDIO File Structure
- Recovery Procedures
The COBOL74, COBOL85, and RPG indexed sequential-access method permits a disk file sequenced by keys to be processed in both random and sequential modes. The COBOL74 and RPG indexed sequential-access method is provided by the SYSTEM/KEYEDIO library (KEYEDIO) or the SYSTEM/KEYEDIOII library (KEYEDIOII). The COBOL85 indexed sequential-access method is provided only by the KEYEDIOII library. Refer to the KEYEDIOII Programming Reference Manual. You can obtain access to KEYEDIO procedures as follows:
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For COBOL74 and RPG programs, through code that is generated by compilers.
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For ALGOL, DCALGOL, and Pascal programs, through procedures in the GENERALSUPPORT system library. Refer to “KEYEDIO Procedures” later in this section.
This section explains KEYEDIO files, which have FILEORGANIZATION value equal to INDEXED or INDEXEDNOTRESTRICTED.
KEYEDIOII includes several features that increase system performance over that of KEYEDIO. These features are documented in the KEYEDIOII Programming Reference Manual. Although Unisys continues to support KEYEDIO and will correct any errors found in the software, Unisys will not provide further performance enhancement, capacity increases, or other product improvements to KEYEDIO in the future. Unisys strongly urges current users of KEYEDIO to migrate to KEYEDIOII at their earliest convenience.
