//An character array with length = 5, DEFINE VARIABLE j AS INTEGER EXTENT NO-UNDO. CREATE FRAME whand. Thanks Rrojo, but RUN command is to call it from Progress or Unix ? Ans: Three type of Purchase Order are there in MFG/PRO: Ans: Use these for single transactions with a supplier, where there is no assumption that further transactions will occur. Display - is used for take the data from record buffer to screen buffer, means display the data on screen. Now remember: All fields will have to be manually repositioned inside the frame. If there existed a SQL function that would return a special session ID that corresponded to the client's transient connection to the SQL engine, it would be possible to have the client and trigger/stored procedure communicate using a pre-determined table as a request queue (by using the session ID as a key). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. If the calling procedure runs the current (called) procedure as an asynchronous remote procedure, the value is returned to the corresponding INPUT parameter of the event procedure specified to handle the PROCEDURE COMPLETE event for the current procedure. R-index function:- Returns an integer that indicates the position of the target string within the source string. A widget is a 4GL aware control that shares common capabilities with other controls of the same type defined in the 4GL. on how to make old code and new code work together, something which I think is a bit weak in the current, But, there also should be good guidance in best, practices with new features (and what not to use. I don't think this pitch is quite clearly focused, however. If you invoke the ENABLE statement for a frame, Progress brings the frame into view unless the HIDDEN attribute for the frame or one of its ancestor frames or windows is TRUE. Updated Jul 21, 2021 A handle to the current ABL session object. Since I do not have anything except consoles and notebook parsing, certain procedures are more complicated. If you're writing instructions on how historical language elements worked, were used, and their general design techniques - that's fine. Myself, I think having the compiler throw non-fatal warnings would be a bad idea. - ERS 1016 -, I almost suggested that! If field is set from expression, field can include all of the elements that are defined for the . Can we pass an include file as an argument to another include file? Progress ABL is statically typed. This is a great discussion. 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. If we had a video livestream of a clock being sent to Mars, what would we see? Weak Scoped Reference - if you have weak scope referenced buffer, you can reference that same buffer outside the weak scoped block. There are two types of procedures: External & Internal. At data movement time, Progress overlays any existing data in the receiving temp table unless you define the receiving temp table with the APPEND option. //An extent without a set length, DEFINE VARIABLE b AS DATETIME LABEL "Departure time". Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? will include (any day now, we promise, Thomas). Record Buffer - A temporary storage area in data memory for a record, field or variable. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, How to make an existing frame responsive in Openedge,progress 4gl, How a top-ranked engineering school reimagined CS curriculum (Ep. Can I use an 11 watt LED bulb in a lamp rated for 8.6 watts maximum? Perhaps there should even be a section in the docs on "practices to be avoided", BTW -- I do agree that the documentation should be, done differently. 2. To you and I and a bunch of other people, shared, variables are anathema, but there are still a lot of. In above example same time if other user also want to update the same record then other user will not have to wait to release the lock, user2 (progress) will find the no-wait clause and it will go for else part or next line of code. It allows you to retrieve a pointer to a fetched record. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Defines and identifies a variable to be shared by a procedure called directly or indirectly by the current procedure. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Progress 4GL - Define variable month/year, How a top-ranked engineering school reimagined CS curriculum (Ep. All relevant tables associated with the online maintenance are updated correctly. Progress allows you to set one index as primary and uses it by default when retrieving or ordering records. My point is that we have a perfectly good tool, ProLint to do this kind of warning. What are the different types of purchase order available in Mfg/Pro? The calling procedures temp table and the called procedures temp table need not have matching indexes. It will be set as shared lock during other times. Your context class needs to be instantiated before it can find the "implementation object" by walking the object chain. One is that a lot of the documentation was written a long time ago when awareness of some best practice standards was not nearly as widely understood as it is today not that they are universally understood even now. //An character array with length = 5, DEFINE VARIABLE j AS INTEGER EXTENT NO-UNDO. In can-find u can't use the exclusive-lock, but in find u can. All character fields should be enclosed in quotes (). The mis-use is what makes them evil, not their existence. If you don't want to be bothered by the list then you can simply delete it. whand = HANDLE(chand). INPUT Parameter data moves from the calling procedure to the called procedure, OUTPUT parameter data moves from the called procedure to the calling. I can go with that a few releases, but sooner or later the docs need to be gone over, updated, and cleaned up. As such, I felt it had to be reasonably inclusive. SYNTAX:- R-INDEX ( source , target [ , starting ] ). Q:- Diff b/w PUT, Set, Update and Display? A relational table is said to be a particular normal form if it satisfied a certain set of constraints. When I pass Temp table as parameters, what are the rules apply to Temp table parameters? Logical gets two values yes / no or true / false initial value No. DEFINE VARIABLE dt AS DATE INTIAL TODAY NO-UNDO. And are we as users supposed to infer that? If the null hypothesis is never really true, is there a point to using a statistical test without a priori power analysis? database. It is depending on the logic build in the include file. Mfrchk.i to leave the loop when the report is running by using the endkey, Mfreset.i - when this is defined it will reset all the values stored after the iteration is over, Mfnp.i to display the datas from the table for the corresponding when you scroll using arrow keys. When we define temp table with like option index will inherit the index information from the database table. Wouldn't it be interesting to have a new, separate best practices manual? Means same time other user can not use that db table. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. Connect and share knowledge within a single location that is structured and easy to search. chand = STRING(whand). Hope it helps. The solution that's been, in my head for awhile is to let users indicate what, things in the syntax they don't want to support, sort. For any given release, there is substantial work required to update and add new documentation to cover new features, so it is not surprising that there isn't a lot of resources available for going back to material that hasn't changed to see if it can be improved. Other languages provide equivalent constructs with the "static" keyword for session wide, global variables and "ThreadLocal" or "thread static . with public data members! 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. I've looked at the SQL Reference and SQL Development handbooks but didn't see anything like this. I don't see why you need another tool that uses a different parser when the native Progress compiler has the entire and correct context. For what domains is it better? We cannot compile an include file. You don't "access" a .pf. What will you write in the CIM program to specify F1, F4 key, Enter and for Default option? The underlying use case for my question was for a way of implementing auto-incrementing primary keys on INSERTs that would communicate back to the client the inserted ID, so that I would not have to force the client to either. JavaScript is disabled. Brief about LOOKUP function? Progress KB - SESSION:TEMP-DIRECTORY does not change when Windows current directory is changed with Win32 API call. Used for processing specific even which always has to be performed. Another factor is that a set of best practice standards is not well established and universally agreed upon. Ans: Use these for multiple deliveries of stock items, where an ongoing relationship with the supplier is assumed, but exact delivery dates are yet to be determined. MESSAGE VALID-HANDLE(whand) VIEW-AS ALERT-BOX INFORMATION BUTTONS OK. The update statement let you make changes to the record and progress upgrades the shared-lock to an Exclusive Lock. Sends the value of one or more expressions to an output destination other than the terminal. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, how to replace all the email id records with progress 4gl, Progress 4gl, Openedge Update Progress.ini in all users, Progress 4GL: How to find where a procedure is defined. " You cannot define a NEW SHARED or NEW GLOBAL SHARED variable in a class definition (.cls) file.". That would have the unfortunate effect of turning a warning into an error. What is can-find function? An Include file is a separate file containing progress code that you can call from other procedures by placing the filename in braces within the procedure. If you need more than one record at a time from a table, you can use the DEFINE BUFFER statement to define additional buffers for that table. Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I'm not saying that instruction of historical language element usages should be eliminated. Progress, Telerik, Ipswitch and certain product names used herein are trademarks or registered trademarks of Progress Software Corporation and/or one of its subsidiaries or affiliates in the U.S. and/or other countries. Why do we normalize database? Indicates that the specified block is undone. INPUT-OUTPUT parameter data moves from the calling procedure to the called procedure, then back to the calling procedure. In find statement u can define no-error but, in can-find u can't. So this feedback is very welcome. another way to pass parameters to a Progress 4GL procedure is passing the parameters with the -param option. The largest Progress unit of execution, consisting of one or more Progress source or r-code statements in a single, outer block. The key point is that shared is a violation of desirable encapsulation and I don't see where you say that. Archive of former Progress Community Discussions, 10.1A Progress 4GL Handbook, by John Sadd and Shared Variab. Progress KB - How to change the current working directory of a 4GL session on Windows? This will create two cross referencing text files that will look like this: "NEW-SHR-VARIABLE bool" in proc1xref.txt tells you that a shared variable named bool has been created and "ACCESS SHARED bool" tells you that it has been used. 2. find returns the value as per where clause and can-find returns the logical value. Static variables do have their uses, albeit in very restricted cases. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 2) There should be a startup parameter which points to an alternate list. Can-do function :- Checks a string value against two types of comma-separated lists: An ID list of one or more user permission strings that indicate what users have access to the current procedure. How will you avoid that? Making statements based on opinion; back them up with references or personal experience. See Trademarks for appropriate markings. Has the Melford Hall manuscript poem "Whoso terms love a fire" been attributed to any poetDonne, Roe, or other? If some nags were to (finally) be inserted in OE10 we might begin to see some general recognition that, oh say shared variables, are a bad idea by the time version 13 rolls out. 4. DEFINE VARIABLE v-cha-work AS CHARACTER NO-UNDO. You must log in or register to reply here. Where does the version of Hamapil that is different from the Gemara come from? Supplier schedules specify dates and even hours of delivery for the near term, and inform MRP and the supplier about long-term plans. Is it possible to give different formats to the variables while defining using shared and new shared statements? 5. 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. 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. To you and I and a bunch of other people, shared variables are anathema, but there are still a lot of folks out there who think they are perfectly OK after all, it a "traditional Progress programming technique". If SEARCH does not find the file, it returns an unknown value (?). Progress recompiles the called procedure, substitutes arguments, and then runs the procedure. When the procedure is run, the Prompt-For statement puts data into those fields. Of course, that's one of the balancing points of being in the software game. When this happens, these users are stuck (deadly embraced) and cannot continue processing. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, Openedge 11 Microsoft SQL Server Dataserver performance, Properly implementing auto-incrementing primary keys in OpenEdge 10.2B using SQL / JDBC, MQ C function (shared library / .dll) binding causing hard crash on zmq_init. What should I follow, if two altimeters show different altitudes? To learn more, see our tips on writing great answers. I wrote a Progress 4GL procedure which is actually a script saved in OS (not in database). Other languages provide equivalent constructs with the "static" keyword for session wide, global variables and "ThreadLocal" or "thread static" variables for thread-scoped variables. Now I'm in the "Open Edge Getting Started: Object-Oriented Programming", and what do I find on page 1-9? You can make this much better and more efficient with any regexp describing exactly what you want to look for. Being able to use 'deprecated' langauge elements is one thing. A Widget is an object that provides visual and interactive capabilities for a progress application. What would really be clever would be for PSC to invest in ProRefactor so that it provided a set of rewrite rules for deprecated features. Prompt-for statement only accepts the input and stores it in the screen buffer. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Continuing the "Shared" thread - why is the "shared" concept being carried forward with new language elements? Oracle 11g SQL - DD/MON/YYYY to MONTH DD, YYYY with WHERE month year clause, How to Extract Year from DATE in POSTGRESQL, Hello how can i joint table in progress 4gl? an SP or singleton object designed to provide such values and, simply retrieve it as necessary. Doing so makes it clear where it. I think there is an opportunity as the language evolves to find approprate places to move forward. OUTPUT PARAMETER - Defines a parameter that returns a value to one of the following destinations: If the calling procedure runs the current (called) procedure synchronously, the value is returned to the corresponding OUTPUT parameter of the RUN statement in the calling procedure. //A 64-bit integer initialized to -200, DEFINE VARIABLE l AS LOGICAL NO-UNDO. Others users can modify the data of the table which is no-locked using exclusive-lock. I.e., even if you aren't tackling best practices and I'm not sure that you aren't, really, in that book the focus should be on understanding what goes on with shared variables, why they are problematic, and what more modern techniques are desirable to use instead. So, "NEW SHARED Variables with the Same Name in Multiple Procedures" is possible. Boolean algebra of the lattice of subspaces of a vector space? Static variables also have their uses -- I'm sure that you might find a few here and there in the Progress 4gl/db source code. Thanks for contributing an answer to Stack Overflow! As it stands there is no incentive for anyone to change bad habits -- and there are plenty of bad habits that need changing. Define shared variable variable name during the definition of the variable in other sub programs. And you can pass in a custom message, like what to use instead. 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. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. The reference I related described shared variable programming as "traditional", not "historical". Using code similar to the following: DEFINE VARIABLE v-cha-usr-tempdir AS CHARACTER NO-UNDO. NUM-ENTRIES function:- Returns the number of items in a list. The calling procedure cannot pass a literal value. I think developers would like a more expressive grammar for new code constructs like the OO-environment instead of disabling keywords. So I would say that shared variables were discussed, in the book "for historical reference", and if their. folks out there who think they are perfectly OK after all, it is a "traditional Progress programming. There are almost certainly two or three factors involved in things like this persisting in the documentation. If an application with several procedures defines a NEW SHARED variable with the same name in each procedure, Progress creates a different instance of the NEW SHARED variable in each procedure. rev2023.5.1.43405. Non-Persistant procedures will store the values to the variables only till the procedure is executing. But I would just like to mention a few things: 1) We are listening. ANS:- By Defining the STREAM you can send the data(output) to more than one destination at a time by single stream name. The "%TEMP%" will be taken as a literal path; it won't be expanded by the shell.. For Windows you could try SetCurrentDirectory: This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Stores the identifier for the records stored in the database. A character longer than 32K should be a longchar */ DEFINE . If frame A is scoped to the Procedure block then will the scope of frame A be available throughout the entire procedure? Yes, there are. When you prompt for information or display information for the user, Progress places that information in the screen buffer. Let's assume you want to stuff a frequently used object handle somewhere: - you can walk the object chain all the time, trying to find your instantiated class instance, - or you could check the local new global shared variable, Perhaps we should stop and think about whether or, not the OO kool-aid is really all that it's knocked, up to be.
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