tag:blogger.com,1999:blog-8486792620151345294Sat, 31 Aug 2024 09:33:37 +0000abapprogrammingbeginnerintermediatedatabasesexception classesmessage classessaptablesSQLadvancedlock objectsmetapersonal experiencereflectiontransactionsworkflowhttp://sapabaptutorial.blogspot.com/noreply@blogger.com (Idan)Blogger15125tag:blogger.com,1999:blog-8486792620151345294.post-1318893719249402967Wed, 23 Mar 2011 11:44:00 +00002011-03-23T04:44:10.632-07:00abapbeginnertablesYou can copy one or more rows of an internal table into another internal table by using the statement INSERT LINES OF. Note the difference between INSERT LINES OF and APPEND LINES OF: INSERT LINES OFCopies the contents of several rows of an internal table to another internal table. APPEND LINES OFAppends the contents of several rows of an internal table to another standard table.http://sapabaptutorial.blogspot.com/2011/03/copying-internal-table-into-another.htmlnoreply@blogger.com (Idan)29tag:blogger.com,1999:blog-8486792620151345294.post-5609348080561188454Sun, 02 May 2010 11:41:00 +00002011-06-03T13:54:23.073-07:00intermediateworkflowA workflow is a model that describes a sequence of operations, representing an actual business process. A simple example would be a leave request. An employee calls his manager saying he’d like to take a vacation. The manager asks for specific dates. The employee specifies the date in which he’ll be absent, to which the manager replies with either “I approve your request” or “Forget it.” Using http://sapabaptutorial.blogspot.com/2010/05/introduction-to-sap-business-workflow.htmlnoreply@blogger.com (Idan)27tag:blogger.com,1999:blog-8486792620151345294.post-3199332186020188740Tue, 01 Dec 2009 06:31:00 +00002009-12-01T09:42:17.627-08:00abapintermediatetablesSay you have a Table called “table_name”, of line type “table_row”, and you wish to iterate on it and perhaps change the rows while you’re iterating. You can do it in ABAP using field symbols.First, you need to define the field symbol. In our example it’s called “symbol_name”FIELD-SYMBOLS <symbol_name> TYPE table_row.Now, you can iterate over the table, assigning each row to the field http://sapabaptutorial.blogspot.com/2009/11/iterating-on-table-using-field-symbols.htmlnoreply@blogger.com (Idan)3tag:blogger.com,1999:blog-8486792620151345294.post-5499728811679847643Tue, 10 Nov 2009 06:24:00 +00002009-11-09T22:44:11.300-08:00abapbeginnerdatabasesSQLHere's a very common syntactic question: What's the difference between INSERT, UPDATE, and MODIFY?The answer is plain and simple:INSERT - inserts a new record. INSERT expects that a record with the required key does NOT exist in the table. Therefore, if a record with the same key already exists, a runtime error occurs. For more details on INSERT, visit here.UPDATE - update an existing record. http://sapabaptutorial.blogspot.com/2009/11/difference-between-insert-update-and.htmlnoreply@blogger.com (Idan)12tag:blogger.com,1999:blog-8486792620151345294.post-5900846885732388721Thu, 01 Oct 2009 15:56:00 +00002009-10-01T11:44:25.074-07:00abapadvancedprogrammingreflectionSay you want to create an instance of a class that implements a certain interface, but you won’t know the name of the class you want to create until runtime. In Java or .NET you would have used the reflection mechanism, but can you handle this case in ABAP?Apparently, you can.Here’s a short code snippet showing how:DATA: iv_classname TYPE seoclsname.DATA: iv_interface TYPE REF TO http://sapabaptutorial.blogspot.com/2009/10/reflection-in-abap.htmlnoreply@blogger.com (Idan)3tag:blogger.com,1999:blog-8486792620151345294.post-583440718876524319Tue, 29 Sep 2009 15:15:00 +00002009-09-29T08:25:11.528-07:00abapexception classesintermediatemessage classesprogrammingIn the previous post, we created a simple ABAP exception class that uses a Message Class. Now let’s see how we can use this class. It’s strongly recommended that you read part one before continuing.The statement for raising (or throwing) an exception class that uses a Message class looks as follows:raise exception type CX_DB_ERROR exporting TEXTID = CX_DB_ERROR=>WRITE_ERROR http://sapabaptutorial.blogspot.com/2009/09/using-abap-exception-classes-with_29.htmlnoreply@blogger.com (Idan)5tag:blogger.com,1999:blog-8486792620151345294.post-598266802729249361Tue, 15 Sep 2009 14:29:00 +00002009-10-02T12:07:09.510-07:00abapexception classesintermediatemessage classesprogrammingWe’ve talked about Exception Classes, and we’ve talked about Message Classes. Now let’s see how we can combine these two together.Let’s take a scenario, in which you have an exception that is thrown whenever a database error occurs in your program. Let’s call this exception class CX_DB_ERROR. We want our exception to display various messages that can also be translated later on to different http://sapabaptutorial.blogspot.com/2009/09/using-abap-exception-classes-with.htmlnoreply@blogger.com (Idan)16tag:blogger.com,1999:blog-8486792620151345294.post-7023509472358107580Thu, 10 Sep 2009 14:02:00 +00002009-09-10T07:11:31.217-07:00abapdatabasesintermediateprogrammingIn case you have an internal table “itab”, and you wish to initialize it (clear it), here are some common statements:CLEAR itab.This command clears the header of a table, but keeps its content. The initial memory allocated for the table remains reserved.(If you don’t remember what a header line is, you can find out here or here).CLEAR itab[].The content of the table is released, and the header http://sapabaptutorial.blogspot.com/2009/09/initializing-internal-table.htmlnoreply@blogger.com (Idan)1tag:blogger.com,1999:blog-8486792620151345294.post-4285510590239583212Sun, 23 Aug 2009 13:26:00 +00002009-08-23T06:29:10.002-07:00abapbeginnerdatabasesprogrammingIn case you have an internal table, and wish to use it in order to update a database table, use the following statements:UPDATE dbtab FROM TABLE itabOrINSERT dbtab FROM TABLE itabWhere dbtab is the name of the database table, itab is the name of the internal tableNote: A common mistake would be to omit the word TABLE from the above statement. Doing this will yield the following error:“You cannot http://sapabaptutorial.blogspot.com/2009/08/updating-database-table-from-internal.htmlnoreply@blogger.com (Idan)0tag:blogger.com,1999:blog-8486792620151345294.post-6118326768938480451Tue, 11 Aug 2009 10:07:00 +00002009-09-15T07:39:49.648-07:00abapbeginnermessage classesprogrammingMessages are text which you use in your programs in order to communicate with your users. For example, you wish to state that some process completed successfully, or, you wish to declare an error.Message classes are containers of messages. Each message has a number and a value. Parameters can also be added to message classes, just as could be achieved by string formatting in languages such as http://sapabaptutorial.blogspot.com/2009/08/message-classes.htmlnoreply@blogger.com (Idan)3tag:blogger.com,1999:blog-8486792620151345294.post-726725334337080174Wed, 29 Jul 2009 05:19:00 +00002009-07-29T01:43:56.693-07:00abapbeginnerexception classesprogrammingFor all you C++, Java and .NET developers, the concept of exception classes, which is relatively new in ABAP, will be easy to understand.Exception classes are, as their name imply, classes that define exceptions.Exception classes are created in a manner similar to creating regular ABAP classes. You can create exception classes in SE80, but you choose “Exception class” as the class type.Java http://sapabaptutorial.blogspot.com/2009/07/exception-classes.htmlnoreply@blogger.com (Idan)5tag:blogger.com,1999:blog-8486792620151345294.post-333570240398959040Wed, 22 Jul 2009 14:22:00 +00002009-07-28T22:33:38.801-07:00abapbeginnerdatabaseslock objectsprogrammingLock objects are used to manage database locking in your program. Locking is important in case you expect concurrent accesses to a database table.You create lock objects in either SE11 or SE80 transactions (under the Dictionary Object in the navigation tree)Each lock object you create is associated with a database table. You can choose by which fields in the table you lock. For example, in case http://sapabaptutorial.blogspot.com/2009/07/lock-objects.htmlnoreply@blogger.com (Idan)4tag:blogger.com,1999:blog-8486792620151345294.post-5068713623722826463Tue, 21 Jul 2009 09:53:00 +00002009-07-28T22:33:59.993-07:00abapbeginnerprogrammingsaptransactionsSE80 – Object NavigatorSE80 is the most important transaction for the ABAP programmer. It’s the entry point for the workbench. From SE80 you can for example create new packages, classes, programs, dictionary objects (database tables) etc.SE11 – DictionaryUsing SE11, you can create and maintain database objects such as Database tables, data types, and lock objects.SE30 – PerformanceSE30 is used http://sapabaptutorial.blogspot.com/2009/07/abap-transaction-you-will-probably-use.htmlnoreply@blogger.com (Idan)1tag:blogger.com,1999:blog-8486792620151345294.post-8349371075143601641Tue, 21 Jul 2009 09:43:00 +00002009-07-21T02:51:47.195-07:00abappersonal experienceprogrammingsapI’ve been working as a software developer for 5 years now. During my career as a software developer, I had experience with many programming languages. I started as a C/C++ programmer(*), continued to Java and J2EE, and even had some experience with C#. One day, not long ago, my manager announced that our project would require some programming in ABAP. He asked me to be one of the first developershttp://sapabaptutorial.blogspot.com/2009/07/how-i-came-to-meet-abap.htmlnoreply@blogger.com (Idan)2tag:blogger.com,1999:blog-8486792620151345294.post-6599000616677732725Tue, 21 Jul 2009 09:25:00 +00002009-09-10T07:14:34.051-07:00metaThis blog contains tips, tricks, tutorials, and stories about my personal experiences with the SAP ABAP language.About the AuthorYours Truly has been a developer for more than 5 years now, with experience with C, C++, Java/J2EE, and, recently, with ABAP.http://sapabaptutorial.blogspot.com/2009/07/about.htmlnoreply@blogger.com (Idan)4