SAP HANA Articles - Page 19 of 58

When you login to SAP HANA Studio first time, it doesn’t have any system added to it. You can add multiple local/remote HANA systems to Studio and manage them.On left side, you have system pane where you can add multiple systems in Studio. When you add a system in HANA Studio, it consists of different folders. Each folder in HANA system performs different functions. We will cover the details later in this tutorial. At bottom you have Properties pane and Job Log pane. In Job Log pane you can check the status of each action that you perform in HANA ... Read More

Once Eclipse installation is done, open software and Navigate to Help → Install New SoftwareWhen you click on Install New Software, a new window will open and you can perform HANA plugin installation.

SAP HANA studio runs on the Eclipse platform 3.6. To install SAP HANA Studio, it is two-step process.First to install Eclipse as per Operating SystemSecond is to install HANA software plugin in Eclipse

SAP HANA studio client is available to run on variety of platforms. Following Operating systems can be used to run HANA Studio client tool:Microsoft Windows x32 & x64 versions with availability for −Windows XPWindows VistaWindows 7Windows 8SUSE Linux Enterprise Server SLES 11: x86 64-bit versionRed Hat Enterprise Linux (RHEL) 6.5Mac OS 10.9 or higher

You can install SAP HANA studio on Linux platform without Root user. In Windows platform, you can perform the installation without administration rights but it will be available only to the user who has installed it.Default Location on Window Platform: C:\Program Files\sap\hdbstudioDefault installation Location under MAC OS: /Applications/sap/hdbstudio (old) or  /Applications/sap/hdbstudio.app (new)Default installation Linux x86 64 bit: /usr/sap/hdbstudio

In SAP HANA, Data modeling can only be performed on Column store tables. You can’t select Row store tables while create data modeling views on top of HANA database. In below pic, you can see it only shows all column store tables to add in Data Foundation layer of a Modeling view.

When you have to run an OLAP query that perform sum of Sales in table with where clause in Country=’US’.Select Sum(Sales) from FCT_SALES where Country=’US’; It storage type is a column based storage in memory cells all the values for Sales will come together in database and when an aggregation ‘Sum’ is performed it will be much faster as compared to an OLTP query.If table is row based storage with values are stored with different data types coming together and a ‘Sum’ aggregation is performed, it will too tough to find values for ‘Sales’ column.In graph, column based tables show the ... Read More

When you have to run an OLTP query just to display the specific records, In row based storage, when you run a Select statement all the different datatypes come together so it will be much faster to run a SELECT statement in Row based storage.Select * from FCT_SALES where Country=’US’;When the same query is run in column based storage, you need to find the values of each column in database and it is time consuming so it is not recommended to create a column based storage tables when your queries are not aggregated and required to run simple SELECT statement.Read More

In a general scenario, it is advisable to store the table as Column store when you have to run complex OLAP queries. OLAP queries include complex calculations and different SQL aggregation functions are used in the query.Select Sum(Sales) from table_name where Column1=’ABC’; Aggregate Functions include −Sum() - returns the sum of the numeric values in a given columnMax() - returns the maximum of the numeric values in a given columnMin() - returns the minimum of the numeric values in a given columnAverage() - returns the average of the numeric values in a given columnPercent() - returns the percentage of the numeric ... Read More

In SAP HANA Studio, you can check the table type from table symbol under Schema. In below snapshot you can see the different symbol for row table and a column table.TEST_Row − Row store table.SHOPFACT − Column store tableTo change the table type, you can use alter table command.Alter table column table_name;