As such, I felt it had to be reasonably inclusive. What are the different types of blocks available in progress? I know that PSC feels it necessary to "comfort" people who are used to procedural code that it is still a valid paradigm, but that doesn't mean that every verb or modifier needs to be called good. I wonder why we have to persuade you all the time, I would rather persuade PSC Based on my experience with OEA, the parser behind ProLint is better than the one PSC is using although they really aren't trying to do the same thing. Include files have an .i extension. What is one circumstance where a shared variable, is superior to a parameter other than in a version of Progress. 1. Used for processing specific even which always has to be performed. No it s not possible to define the variable in two different formats in two programs. It is good news, and I was going to mention it - but you beat me to it. ANS:- Progress Creates 5 log files at the time of database creation-, 3. If you do not want, or if you do not need, the value of a variable to be undone even when it has been changed during a transaction, use the NO-UNDO option with the DEFINE VARIABLE statement. What are the different types of Blocks? with public data members! A character longer than 32K should be a longchar */ DEFINE . This is unfortunate in many ways because the code examples in particular often convey approaches which are not best practice, which certainly doesn't help people who are learning the language. who remain running on older releases. I can go with that a few releases, but sooner or later the docs need to be. How can I control PNP and NPN transistors together from one pin? Connect and share knowledge within a single location that is structured and easy to search. Pxmsg.i to display the error message level of error etc. Otherwise, it is the directory specified using the Temporary Directory (-T) parameter. If you want some code, I can provide itbut based on browsing some of your other questions and answers, I don't expect that you need it :-). /* A handle is a handle to anything: a session, an on screen widget etc */ /* A Com-handle is used for ActiveX Com-automation */ DEFINE VARIABLE h AS HANDLE NO-UNDO. If one is making minor tweaks, there is a strong tendancy to just leave things as they are. I truly appreciate the time and work you put into sharing your knowledge. MIP Model with relaxed integer constraints takes longer to solve than normal model, why? Progress Documentation The use-index option of the record phrase allows you to choose the defined index by which you want to access the selected records. Or, you can put the value in an SP or singleton. LIKE option - Indicates the name of the variable, database field, temporary table field, or work-table field whose characteristics you want to use for the variable you are defining. Earlier known as Progress 4GL. There are two types of frames: down and one-down. //An extent without a set length, DEFINE VARIABLE b AS DATETIME LABEL "Departure time". But seriously, OO is an interesting idea that makes some problem domains simpler. If you're on an older release that haven't got the ADD-INTERVAL function you can use the DATE function and add +1 to the month instead (just remember that if the month is December (12) you're going to have to increase the year instead and set the month to 1). I'm always a fan of showing more options and explaining why one would make choices, but the specific example this thread started with is definitely a best practices issue well, or a worst practices issue. 1. 3. NO-UNDO variables are efficient; use this option whenever possible. I wrote a Progress 4GL procedure which is actually a script saved in OS (not in database). Progress automatically puts a SHARE-LOCK on a record when it is read and automatically puts an EXCLUSIVE-LOCK on a record when it is updated. I personally don't get hung up and worry about "best practice" - there's lots different ways to skin a cat, depending on the variations of what a coder's trying to accomplish, personal quirks, etc. A constant, field name, variable name, or expression that you want to pass as a compile-time argument to the external procedure you are running. But obsolete if not dangerous techniques shouldn't be listed as examples of how to work with the product's current technology when there are better and safer ways to accomplish the same thing. ASSIGN statement - Progress.com A preprocessor directive is a statement that begins with an ampersand and is meaningful only to the preprocessor. progress-4gl Tutorial => Basic variable declarations PSC has certainly done that with some language elements which were (and are) in wide use and I see no reason why shared shouldn't be added to that list. How do you sort records with the use-index option? And, another factor I think is that PSC seems to be, very conscious of the fact that there are a lot of. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Function can be defined inside the procedure , but procedure can't . There are two types of external procedures persistent and non-persistent. How are engines numbered on Starship and Super Heavy? Progress certainly supports SQL, but the Progress 4GL and SQL are two different things. I've an old desktop application developed in progress 4gl.There is a frame contained in a progress window now my task is to make the frame responsive ie based on the size of its container window the frame should resize dynamically.Is it possible in Progress any workaround will be appreciated.Thanks openedge progress-4gl Share Improve this question Normalization is essentially a two step process. How to determine if a shared variable has been defined NEW? The value of a global shared variable remains available throughout an OpenEdge session. When you write a record to the database, Progress gets that record from the record buffer. Many of these applications are also filled with editing blocks too do you want to support people continuing to use them or point them in how to get rid of them? Frames and dialog boxes contain field groups, and field groups contain field-level widgets or other frames. "Don't want" is not a requirement I take very. And, clearly they should be provided with guidance on how to make old code and new code work together, something which I think is a bit weak in the current documentation. Before the Compiler analyzes your source code and creates r-code, the preprocessor examines your source code and performs text substitutions.You control the preprocessor by placing preprocessor directives throughout your source code. For first can use multiple indexes and Find cab use only one index. Is there a generic term for these trajectories? Brief about LOOKUP function? It isn't as clean as how it would be done in Oracle, but it might get you to where you want to be. As n vn u want recurring = exact qty. Define shared variable variable name during the definition of the variable in other sub programs. After half a year, I began understand the intricacies of working with this server and procedures written in ABL. That this evil may be useful is a separate issue. Shared variables need to be relegated to the "for historical information only" pile and left there. SESSION system handle All Products Current publication X Content Loading. Ans:- The preprocessor is a component of the Progress Compiler. The scope of the record is the nearest enclosing block that encompasses all the references to the record. I don't think it's reasonable to expect a developer to read the entire handbook when they're looking for information on one language element. Such as using shared variables / temp-tables as an example of procedural programming in the new OO intro docs translation here. It will commit the data to the database only at the end of the outer repeat block. Progress uses transactions to automatically handle this processing. Not only does that provide the programmer new to this area with guidance in the right usage pattern, but it will help to educate him or her on how he or she might rework older code. I apologize for the code not being just the genius patch that Stack Overflow loves so much, but it's a complex issue. For first can use multiple indexes and Find cab use only one index. of a reverse reserved keyword kind of thing. In fact, unfortunate as it may be, most Progress users have never even. One-down frame displays single iterations of data and down frames displays multiple iteration of data. An infeasible workaround is to construct a special stored procedure specifically for performing the INSERT(s), but that is not a general solution as the INSERT command takes a variable number of parameters (not least of which is which columns and data to populate with), while the stored procedure must have a fixed number of parameters. "Traditional" ways of doing things need to be replaced when better ways of doing things come along. Q:- Can you define a variable with same name both inside and outside a procedure? Multi-table deadlocks can be avoided by locking the tables in same order in all applications, thus preventing a deadlock condition. This, to me, is one of the very interesting challenges facing PSC. That states that no undo handling is wanted for this specific variable in case of a transactional roll-back. PSC should license the technology and make it available to everyone. (3260). Q:- What is the diff between for first and find first? Database trigger - Also known as a schema trigger, a block of 4GL code that executes whenever a specific database event occurs such as creating or deleting a table, assigning a value to a field, and so on. At the very least, it would seem that one would need a run statement in a loop with many iterations and, of course, this would first imply the use of a persistent procedure so that the run is a run of an IP and any fixed parameters were set once outside the loop. Defines and identifies a variable that can be used by any procedure that names that variable using the DEFINE SHARED VARIABLE statement.