Welcome to the IBM Rational PL/I community. Here you will find the latest technical and business information, and educational information about PL/I and related z/OS and AIX topics including IMS, CICS, and Rational Developer for System z.
PL/I Compilers are now live on the Request for Enhancement (RFE)
Community. It is a great place where you can collaborate with
development teams and other product users. Our development team will
review your RFE and provide status updates throughout its lifecycle. Here is links to the Community : PL/I RFE
Looking forward to hearing from you.
Check out this demo showing how to code PL/I to interface with AIX. Using the Power systems sandbox, you can try PL/I for AIX and create a network application in PL/I. Optimize server performance and programmer productivity with IBM
Network application in PL/I: networking, system APIs
In the previous blog entry we showed how Character Large Objects (CLOBs)
can be manipulated with LOB locators. In this blog we will discuss
the use of LOB file references.
LOB file reference variables are also very useful when working with
LOBs. The are used to import or export data between a LOB column and
an external file outside the DB2 system.
The benefits of using LOB file reference variables are that they:
- use less CPU time than moving LOB data with a... [More]
This blog entry is the first of two articles that will provide some guidance on how to work
with DB2 large objects (LOBs) in PL/I. They both refer to the 'pliclob.pli' file in the PL/I Cafe 'Files'
section for samples of actual code.
One way to use LOB data from a DB2 table is to declare a host variable
large enough to hold all of the LOB data. This requires your program to
allocate large amounts of storage and requires DB2 to move large amounts
of data. This can be inefficient or impractical.
Webcast Join our experts, Ray Jones, Vice President, IBM System z® Software, and Kevin Stoodley, IBM Fellow and CTO for Enterprise Modernization Tools, Compilers and Security, to learn how IBM’s latest compilers, middleware and tools can help you stay on the technology curve. In this complimentary webcast, Ray and Kevin will discuss best practices and approaches to plan and execute a successful compiler migration, alongside CICS®, IMS™ and DB2® upgrades. They will also go over IBM’s strategy for compilers and tools on System z to help you... [More]
One of the new options introduced in the new 4.2 release of Enterprise PL/I
is the UNROL L option. However, to understand it, you first need to understand
what the compiler does with loops.
Usually, the compiler turns a DO loop into a sequence of instructions which is
followed by a test and then a conditional branch back to repeat those instructions
with some updated values (and the sequence of instructions may be preceded by a
conditional test to see if the loop should be run at all).
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Check out all the information about the latest release of Enterprise PL/I for z/OS. You can
get a summary of the release as well as all the announcement details.
See what's new with Enterprise PL/I for z/OS, V4.2 including enhancements to leverage the latest z/OS. For all the details about the Enterprise PL/I for z/OS, V4.2 announcement, see I BM Enterprise PL/I for z/OS V4.2 delivers performance improvements and usability enhancements.
Under the old OS PL/I and PL/I for MVS compilers, all extents (i.e. bounds and string lengths) for STATIC variables
and for BASED variables (not using REFER) had to be optionally signed integers. This made it hard to parameterize your
code (unless you used the macro preprocessor and then your listing would look much different than your source).
With Enterprise PL/I however, extents are required only to be what are known as "restricted expressions", i.e. expressions
that the compiler can reduce to a... [More]
Code reviews were once common practice, but at some companies they have been reduced or even eliminated entirely. Often this
has been done in the name of cost savings even though the earlier a bug is found in the application life cycle, the less it costs.
Also, if you are still conducting code reviews, your coworkers are probably not perfect: they can miss
some errors and can overlook violations of your coding standards .
Fortunately, the Enterprise PL/I compiler can help you... [More]
There are three, perhaps overlooked, new features of Enterprise that let you "compile out" code either
unconditionally or conditionally:
To cause the compiler to skip some code unconditionally, you could try to enclose it in comments. But this works
only if that code itself contains no comments. However, as of the 3.9 release, you can enclose code
in %DO SKIP; ... %END; , and then the compiler will unconditionally skip over the enclosed code.
To cause the compiler to... [More]
There are many good things about the new PLI for AIX 3.1 release, but the biggest is that
PL/I for AIX is now fully up-to-date: it had been stuck at its last release in 2004, but
it now has all the language features added to Enterprise PL/I (and PL/I for Windows) in the
years since then.
Recent blog entries point to documents with all the details of what's in the 3.1 release,
but in brief, PL/I for AIX, Enterprise PL/I, and PL/I for Windows
support the same compiler options
Check out all the information about the latest release of PL/I for AIX. You can get a summary of the release as well as all the announcement details. See what's new with PL/I for AIX V3.1 including enhancements to leverage the latest POWER7 hardware and interoperability with the latest middleware. For all the details about the PL/I for AIX, V3.1 announcement, see IBM PL/I for AIX , V3.1 delivers support for the latest IBM POWER7 Systems architecture as well as many functional improvements and usability enhancements .
Want to experience PL/I for AIX, productive and powerful development environment for building PL/I applications. Check out these features in PL/I for AIX, V3.1: Provides improved performance via both front-end changes and back-end optimizer enhancements Provides an improved debugger that enables you to conveniently debug programs form your windows-based workstation Improves the MACRO preprocessor Provides improved support for SQL and CICS Leverages productivity with new and improved built-in functions Increases quality control with new and... [More]
The history of PL/I stretches back to the 1970s when IBM, at the prompting of the SHARE user group, delivered the first PL/I compiler so that users would have a language with the combined strengths of Fortran and COBOL. IBM then delivered three releases of OS PL/I Version 2 in the 1980s and PL/I for MVS and VM in the early 1990s. All of these releases were based on a common code base that gradually became old, plus both hard and expensive to enhance and maintain.
However, with the advent of the PC, IBM built a... [More]