Inside the database, ABAP code exists in two forms − So, unlike C++ and Java, ABAP programs are not stored in separate external files. The run-time system processes all ABAP statements, controlling the flow logic and responding to user events. They execute under the control of the runtime system that is a part of the SAP kernel. It means basically all three levels can be installed on top of each other on one computer or each level can be installed on a different computer or a server.ĪBAP programs reside inside the SAP database. Technical distribution of software is independent of its physical location. Note − ABAP programs run at the application server level. Communication happens between each layer of the system, from the Presentation layer to the Database and then back up the chain. The server communicates with the Database layer that is usually kept on a separate server, mainly for performance reasons and also for security. The Application server is not just one system in itself, but it can be multiple instances of the processing system. All the central processing takes place in Application server. This could be a web browser, a mobile device and so on. The Presentation layer consists of any input device that can be used to control SAP system. The 3-tier Client/Server architecture of a typical SAP system is depicted as follows. Let's start with the high level architecture of SAP system. Currently it is positioned, along with Java, as the main language for SAP application server programming. Leave a comment in the below comment section and let us know your feedback.ABAP stands for Advanced Business Application Programming, a 4GL (4th generation) language. Please stay tuned for SAP ABAP for HANA tutorials. HANA Data Type ABAP Data Dictionary Type Length SMALLINT INT2 2-byte integer INTEGER INT4 4-byte integer DECIMAL DEC Packed number SMALLDECIMAL DEC Packed number FLOAT FLTP Binary floating point number NVARCHAR CHAR Unicode character string VARBINARY RAW Byte string BLOB RAWSTRING Byte string NCLOB STRING Unicode character stringĬongrats! You have successfully learned about External Views in ABAP for HANA. When you are creating external view to the HANA model only below mapping data types are supported. Supported HANA Data Types with ABAP Data Types The external view editor contains a button called “ Synchronize” to synchronize the external view with HANA view. Synchronizing of external view with the HANA repository is required when there are any changes done on the HANA model after creation of external view. Synchronizing External View with the HANA repository We can create several external views for one and the same HANA model.
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