Nodes in calculation view in sap hana

At times we feel there is a better way to write a node or a join. However when we build a new node with a different logic, we cannot replace the existing one with this new one using the replace node option - even though they have the same signature.

The replace node option only shows preexisting nodes that are already connected. The newly created node does not come up. Are we doing anything wrong? I don't see the point in this functionality if I cannot build a new node and replace an existing one with it. Its incredibly painful to do it manually asall the upper nodes get distorted when we delete a lower node and then add a new one.

Lars Breddemann - great if you could shed some light on this one. So, this feature really is more about deleting nodes from the data flow graph without loosing all the semantic mapping. Node Data Source". It's pretty much the complementary function to selecting an edge between two nodes and then adding a new node onto it.

The new node will then be placed between the two nodes connected by the selected edge. With these two options you should be able to get pretty close to a in-place replacement of a node with arbitrary other node.

I could really use this to match many of my needs. Thanks for the pointer. Not what you're looking for? Search community questions. This question has been deleted. This question has been undeleted.

John F.

nodes in calculation view in sap hana

Posted on Mar 03, at AM Views. Hi, We're working on improving existing graphical calculation views for performance. Replace data source works fine though.

Creation Of Views Calculation View - SAP HANA & SAP BW on HANA Tutorial For Beginners

Any help or pointers will be appreciated Lars Breddemann - great if you could shed some light on this one. Add comment. Related questions. Sort by: Votes Newest Oldest. Best Answer. This answer has been deleted. This answer has been undeleted.

Posted on Mar 03, at AM. The documentation explains this. Node Data Source" It's pretty much the complementary function to selecting an edge between two nodes and then adding a new node onto it. Alert Moderator. You already have an active moderator alert for this content. Mar 04, at AM. Thanks Lars, "It's pretty much the complementary function to selecting an edge between two nodes and then adding a new node onto it.An aggregation node is usually attached to the semantics node by default if you are building a transaction calculation view This means that the data category CUBE was selected when initially creating the view.

Additional aggregation nodes can be added if required. This is just to see the data we will be working with.

Now, come back to the Aggregation view and click it. Click on the orange circle as always to remove the DATE field as shown below. Confirm the removal of this field. The field gets removed as shown below. As seen below, since the date field was removed the score gets aggregated and summed up. This is because the default aggregation setting is SUM. But there are other types of aggregations that can also be performed. At the bottom, now the properties section opens up.

At the far bottom, you find an Aggregation setting. This is by default set on to SUM as explained earlier. Thus, whenever values aggregate, they add up according to this default setting.

All the available values for aggregation types are as shown below. Save and activate this view. Now, execute a data preview. As seen below, an average value has been displayed in the output. The aggregation node also helps remove duplicates. When two rows in the incoming data set contain the same data, the aggregation node also works as a duplicate row remover. Save and activate the view. Save and activate this view now. To do this, right click on the projection and click on Data preview as shown below.

Now go back and run a data preview on the entire view. You should get the below result. All the duplicate values have been removed. Let me know in the comments section below if something was unclear. As always, if you feel this website helped you learn something, please share it across social media by using the share button below. It takes money and a lot of time and patience to keep this website running for free to everyone.

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Stay Motivated. Hello, which version on Hana Studio it is? Can you please help me to understand this setting? It had nothing to do with removing duplicates. Hi Shyam, I am working on a calculation view of type cube.In this one, we learn how to rank rows and pick up the highest or lowest ranks according to a condition using the Rank function in calculation views.

In a company XYZ, employees in the finance department with ID numbersand have to undergo an evaluation to check which one of them is better at their job. They undergo tests from January to May on the first day of every month.

Thus, each employee goes through five such evaluations. The top score they get during any of these months would be considered as their final score at the end of these evaluations. Our requirement is to create a view of this data that displays only the top score of each employee along with the date on which the employee took the evaluation.

The data has been fed into this table for each employee and their respective scores each month. To achieve this, we would need to build a calculation view which ranks these rows of data and picks up the highest score for each employee. Just a small view which displays all data from the table. We add a projection with the table and connect it to the aggregation. Select all fields in the projection. Now select all fields in the aggregation.

When done, save and activate this view. You would now see a rank block inserted in between the projection and aggregation. The placement of these blocks looks messed up though. After pressing this button, you would see that the blocks have been properly arranged as shown below. Once done appreciating this feature, click on the Rank node. On the right pane, first select the fields you need to take to the next level and then come to the bottom section marked in the red area below.

Here the rank configurations would be maintained.

Union Node Pruning in Modeling with Calculation View

The first setting is the sort direction. Here you specify whether you wish to sort it with the highest value first or with the lowest value by choosing Descending or Ascending respectively.

Since we need to pick up the maximum score, we keep this at Descending. This is the field we need to sort Descending as per our previous setting. This is the field we wish to sort by. Once done. Save and activate the view. Now, check the data preview to confirm the results. As seen below, the view has ranked and picked up only the top score of each employee and also the date on which they achieved this feat.

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nodes in calculation view in sap hana

Transfer data from On-Premise to Cloud. Application Privilege : sap. Run command prompt as administrator and configure environment variables as followings, then execute DP Agent Configuration tool.

nodes in calculation view in sap hana

DP Agent will start by this. Next, input as followings. Go back to the top of the tool and choose option 8 Adapter Registration. Then choose option 2 Register Adapter and input as follows. Save it when completed. Open the remote source by clicking the name, schema is displayed. And when you open the schema, you see the tables in the schema.

Remote source has been created in the previous step. Next step is creating virtual tables. Before this I need to grant privileges to create virtual table to administrator of the HDI container. First, create a service for grant privileges. Register the service to mta. Update it as followings. At this point, I have created remote source and granted privileged to create virtual table. Next, create virtual tables. Input virtual table name, remote source name, schema name and table name.

Save and build it, then virtual table is created. Create all necessary virtual tables. Go to Database Explorer to check the virtual table. Execute SQL Select statement against the virtual tables and you can confirm data can be retrieved.

The following 2 migration methods are mainly available. Access to the Calculation View and confirm the data and view are successfully migrated. You can see runtime objects of Calculation Views here. There may be other more efficient ways of migration, but I hope this helps you. Technical Articles. Takao Haruki.

Posted on April 10, 6 minute read. Follow RSS feed Like. The steps are as follows. Setup DP Agent 1. Alert Moderator. Assigned tags.If you delete bottom node of calculation view from top node, all reference columns will be also removed from all connected top nodes. First of all you should use development perspective. If you use Modeler perspective you can easily migrate your views to development perspective. Package cannot be structural.

Aggregation node in SAP HANA Calculation View

You can unmark this option using edit package. But you can open Calculation view with text editor:. Another very useful approach concerning new view development — add Technical Union before final Aggregation:. Dmitry Marinin. Posted on January 18, 4 minute read. Follow RSS feed Like. Alert Moderator. Assigned tags. Related Blog Posts.

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Aggregation node in SAP HANA Calculation View

Former Member. January 18, at pm. Thanks Dmitry. Like 0. Dmitry Marinin Post author. Enio, you are welcome! January 24, at pm. Makes it clearer. Very useful. Thank you! Shaun Smith. May 16, at pm.Modeling views are created on top of database tables and implement business logic to create a meaningful report.

Attribute views are mainly used to model master data entities like Product, Employee, Business Partner. If there are massive Joins expected in the Model better to use Attribute Views for achieving better performance. Tables cannot be directly used in the star join of the Analytic view. Attribute views need to be built on the tables which are needed to be used in the Analytic view star join node. Calculation views are required to deliver complex business requirement. Calculation views are simple and yet powerful because they mirror the functionality found in both attribute views and analytic views.

Graphical modeling: Replace node SPS9

Calculation views can be created as Graphical or scripted views depending on the business requirement. Scripted views are created as sequences of SQL statements. If the calculation view is created through script then the owner of the view will be the user creating the calculation view. Calculation views can be referred as combination of tables, column views, attributes views and analytical views to deliver a complex business requirement. They offer to combine different analytical views into one source of data for reporting.

Based on the requirement these different nodes can be used in the calculation view during modelling. Plan Viz is used to Analyze how the query execution is taking place in HANA engines used, operators, Number of column queried from tables. Select the query and right click and select explain plan viz. In this Page it provides Information about Operators used, number of tables used, memory Allocated.

In the Screenshot Orange line is the Critical path, if we can optimize the Orange line nodes Query performance can be improved. The specified user name must not be identical to the name of an existing user, role, or schema.

These users are meant for using specific applications only. All privileges needed for the application have to be granted to such users, preferably using a role combined with the application. Package Privilege Options. Package Privileges. Get Started with CDS.

If we use SQL script it is not a good idea as we do not create anything new in Production system. The transaction table is added to the data foundation and the dimensions are joined to the Transaction table. In the star join node only of the Analytic view only Attribute views can be added.

If the type is not specified then during activation, system automatically assigns attribute to columns of type varchar or nvarchar and measure to columns of data type integer. When the calculation view is created as CUBE you can select the final node before the semantics to be aggregation or star join.On the way of achieving this we need to think on different aspects involved. Let me take few lines here to quote some of the real world examples to provide better clarity on my talk.

Why does this happen? Let us now get back from the mechanical world to our HANA world and start thinking the underlying execution of HANA database analogous to the above quoted mechanism. Let us understand this by an example : Consider that we are creating sales report for a product across the years using a calculation view. Yes, this can now be achieved in the case of union operation in a calculation view by providing pruning definition in a predefined database table which is called as Pruning configuration table.

Definition of the pruning configuration table should be of the below format :. Now in the advanced view properties of calculation view mention this pruning table as shown below:.

And execute the query on that view involving a filter condition that is equal to the condition mentioned in the pruning configuration table :. Now remove the pruning configuration table from view properties of the calculation view, activate it and execute the above query again and perform the plan viz of the same.

Thus Union node pruning in CV now helps to decide how the execution flow must be carried based on the query dynamically. Hope the provided information is useful. Any suggestion and feedback for improvement will be much appreciated.

Thank you. I understand that you need to insert the data into this config table like 1 for and other for but I like to make this dynamic for any year not hard coding. Is it designed so or is a bug? I have the same problem as you have with the union pruning and star join, Did you find any solution for this? I also notice that with unoin pruning I get long compilation time, about 7 sec.

Where is the official product documentation for this feature? Can we use pruning configuration table with date data type? I am trying to get a union view working with recent data in Hana and old data in virtual table from non Hana system.

Its a really nice blog, but I have a question on it, does it only work when sources in Union are table? Posted on January 29, 3 minute read. Follow RSS feed Like.

nodes in calculation view in sap hana

Now in the advanced view properties of calculation view mention this pruning table as shown below: Now activate the above view which involves 2 data sources PRUN1 and PRUN2 with pruning configuration table. Thus Union node pruning in CV now helps to decide how the execution flow must be carried based on the query dynamically Hope the provided information is useful.

Alert Moderator. Assigned tags. Related Blog Posts. Related Questions. You must be Logged on to comment or reply to a post. Naresh Setty. February 27, at am. Thank you for the blog is it possible to change the values in pruning table dynamically? Is this possible? Like 0.

Poornapragna Malamandi Suresh Post author. Hi Naresh, With the current feature development, insertion of value to the config table is a prerequisite. So achieving it is done manually in the above example. Thanks and Regards, Poorna.


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