In COBOL for z/OS, V5,1, when compiling your source files that are too complex or in a relatively large size, and if you have specified the OPTIMIZE level, it may take excessive amount of time or storage. Thus a new compiler option, MAXPCF , is introduced to allow you to control the amount of time and storage used when optimizing a program. You can specify the maximum program complexity factor with this option. The new term, Program Complexity Factor (PCF), is a value calculated by the compiler, and represents the complexity of the program... [More]
COBOL for AIX version 4.1 introduces a new utility, the source conversion utility (scu), to assist the conversion of programs in non-IBM COBOL source formats.
The main function for utility is to “normalize” COBOL source input text so that the resulting output source text can be compiled by IBM COBOL for AIX V4.1. The input formats that are specifically addressed are some non-IBM fixed-format source and COBOL standard free-format source.
The individual transformations done by scu includes the following:
The COBOL for AIX compiler supports the extended source format as an IBM extension.
Fixed source format consists of the following areas in a 72-character line. Extended source format consists of the following areas in a 252-character line.
Sequence number area
Columns 1 through 6
Columns 8 through 11
Columns 12 through 72 in fixed source format
Columns 12 through 252 in extended source format
Note that... [More]
To define variable length tables in COBOL, we usually specify the OCCURS ... DEPENDING ON clause in the data description entry for an item contained within a group structure. While this defines an item with a variable number of occurrences at run time, in earlier versions before Enterprise COBOL V5.1, we also need to specify a maximum number of occurrences in the syntax , and hence a maximum size for the table and the containing group, which causes usability problems in some contexts.
In particular, this problem occurs when... [More]
IBM® extensions are features, syntax rules, or behavior defined by IBM rather than by the COBOL standards.
In the Appendix of COBOL Language Reference, a table lists IBM extensions with a brief description. If an item is listed as an extension, all related rules are also extensions. For example, USAGE DISPLAY-1 for DBCS characters is listed as an extension; its many uses in statements and clauses are also extensions, but are not listed separately.
This blog entry and the folloing ones aim to introduce these IBM extensions... [More]
Enterprise COBOL for z/OS V5.1 was announced on April 23, 2013 and became generally available on June 21, 2013. This new compiler was re-architected to include an advanced technology framework for optimizing COBOL applications and exploiting z/Architecture, including the latest zBC12 hardware, providing significant performance improvements over Enterprise COBOL V4. These performance improvements will reduce CPU utilization and lower operating costs for customers running business critical applications. Enterprise COBOL... [More]
SHARE in Boston is being held August 11-16 at the Hynes Convention Center. IBM’s own “Captain COBOL”, Tom Ross, will be presenting two highly informative sessions on IBM Enterprise COBOL for z/OS, V5.1.
Session 13792: ZOMG The Next COBOL Compiler Has Arrived! will discuss all of the new features that IBM’s developers have added to Enterprise COBOL for z/OS, V5.1 such as the exploitation of the latest zArchitecture, improved XML PARSE and XML GENERATE, the ability to improve the performance of your... [More]
At Innovate 2013 right now? Want to learn about, and gain experience with, the recently announced Enterprise COBOL for z/OS, V5.1 in a workshop run by two members of the compiler development team? It's not too late to enroll in hands-on technical workshop WKS-2280 (Wednesday at 8am).
This workshop offers first-hand experience on new optimization, debugging, and programming features (e.g XML, UTF-8) shipped in this product and will be a combination of lecture, demonstration, and hands-on exercises. As a... [More]
The Fix Central website provides fixes and updates for system's software, hardware, and operating system. You can search, select, order and download fixes to your system with a choice of delivery options. To help you locate and obtain fixes in an efficient way, Fix Central is designed to provide multiple search and ordering options. You can select your favorate search criteria that include the following:
Search by APAR or SPR identifier (search by the unique string)
Search by Fix... [More]
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Attending Innovate ? Want to learn about, and gain experience with, the recently announced Enterprise COBOL for z/OS, V5.1 ? Enroll in hands-on technical workshop WKS-2280.
The workshop will offer an overview of the new Enterprise COBOL for z/OS V5.1 compiler. The format of the workshop will be a combination of lecture, demonstration and hands-on exercises. As a participant in the workshop you will have the opportunity to use Rational Developer for z to complete the hands-on portion of the workshop.
In earlier versions of COBOL for AIX, WSCLEAR cleared all of a program's WORKING-STORAGE data items. Beginning with Version 4, WSCLEAR clears a program's non-EXTERNAL data items in WORKING-STORAGE to binary zeros at initialization.
With COBOL for AIX, V4.1.1, you can use WSCLEAR with a new suboption, nnn (an integer between 0 and 255), to initialize each byte of WORKING-STORAGE data to a specific value. The storage is initialized before any VALUE clauses are applied.
See the syntax of WSCLEAR... [More]
z/OS supports simplified processing of multiple versions of related data. The sequences of different generations of data or updates to the data are known as generation data groups (GDGs). Each data set in the group is called a generate data set (GDS) or simply generation.
On AIX, “file” is the equivalent term for “data set” on z/OS. Grouping related files offers the following advantages:
All of the files in the group can be referred to by a common name
The files in the group are kept in... [More]
In IBM mainframes, the queued sequential access method (QSAM) is widely used as an access method for files, or more properly data sets. But it has not been implemented in AIX systems. In COBOL for AIX, V4.1.1, a new file system, QSAM file system , is introduced to improve the file input-output performance. You can transfer QSAM files from the mainframe to AIX without the need to compile with -qhost . Simply use the FTP commands binary and quote site rdw . An exception here: If the file contains EBCDIC character data, compile the AIX COBOL... [More]