2/15/2024 0 Comments Mysql like vs havingLet’s do this to the product quantity in our example.OVER( ORDER BY DESC/ASC) Clause: It is the order of ‘sort variable as decreasing/ascending and give a line number for the sorted variable ’.It indicates a row number for every row on the table.Let’s assume we have a table that has a product id, a product name, production quantity, a purchase price (EUR), a selling price (EUR), a production start date and production end date.Now I want to give some examples about the functions I have mentioned at the beginning of my blog. We have created out CDS, Table Function and AMDP Class.GitHub ABAP Keyword Documentation (sap.com) ).We need to specify the table function we will use at this point.IF_AMDP_MARKER_HDP: It is used to making ABAP classes compatible with SAP HANA database features and performing some special calculations.(AMDP gets active before creating the class too.) At this point we should call our AMDP class.: #CLIENT : It is given the current client ID implicitly by the Open SQL statement SELECT and can be used to restrict the results set in the Native SQL implementation of the function.RETURNS: These are the set of fields that we want to review in our CDS and will return from our AMDP class.Production_place_text as ProductionPlaceText Key production_place_id as ProductionPlaceId, 'Production Place Products And Costs View' In our scenario, we are taking our data from the table that includes the production place and products made in there. Since I think that these functions can be understood better with examples, let’s start by creating a simple example.įirst we start with creating a CDS which will consume our Table Function.īy clicking right to our package, choose the option new -> other ABAP Repository Object and Choose data definition. Let’s talk about the ROW_NUMBER, RANK and DENSE_RANK functions if we are familiar with the concepts now. To schematize the relationship between CDS, AMDP and Table Function simply By using CDS and AMDP, more flexible and higher performance solutions can be achieved both in the subjects of data modelling and database operations.It is used to represent a specific function in CDS and called within AMDP or CDS views.How do we create the communication between CDS and AMDP? When database requires specific functions that open SQL does not include, then we need to consume AMDP in CDS.įor example, in this case, if it needs us to perform complex calculations in CDS, sorting or deleting multiplied data, we can achieve this with AMDP. Why we have the need to consume AMDP in CDS? It can process and modify the data on the database layer.It is able to have multiple result returns on complex logic. AMDP is a class that allows us to write the Object Oriented classes at back-end for the views mentioned above.Defined in ABAP repository using SQL DDL syntax.
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