SAP HANA Interview Questions

1.What are the different types of replication techniques?
1.ETL based replication using BODS
2.Trigger based replication using SLT
3.Extractor based data acquisition using DXC

2.What is SLT?
SLT stands for SAP Landscape Transformation which is a trigger based replication. SLT replication server is the replication technology to pass data from source system to the target system. The source can be either SAP or non-SAP. Target system is SAP HANA system which contains HANA database.

3.Is it possible to load and replicate data from one source system to multiple target database schemas of HANA system?
Yes. It is possible for up to 4.

4.Is it possible to specify the type of data load and replication?
Yes either in real time, or scheduled by time or by interval.

5.What is Configuration in SLT?
The information to create the connection between the source system, SLT system, and the SAP HANA system is specified within the SLT system as a Configuration. You can define a new configuration in Configuration & Monitoring Dashboard (transaction LTR).

6.Is there any pre-requisite before creating the configuration and replication?
For the SAP source systems DMIS add-on is installed in SLT replication server. User for RFC connection has the role IUUC_REPL_REMOTE assigned but not DDIC.
For non-SAP source systems DMIS add-on is not required and grant a database user sufficient authorization for data replication.

7.What is Configuration and Monitoring Dashboard?
It is an application that runs on SLT replication server to specify configuration information (such as source system, target system, and relevant connections) so that data can be replicated. It can also use it to monitor the replication status (transaction LTR).
Status Yellow: It may occur due to triggers which are not yet created successfully.
Status Red: It may occur if master job is aborted (manually in transaction SM37).

8.What is advanced replication settings?
A transaction that runs on SLT replication server to specify advanced replication settings like
Modifying target table structures,
Specifying performance optimization settings
Define transformation rules

9.What is Latency?
It is the length of time to replicate data (a table entry) from the source system to the target system.

10.What is logging table?
A table in the source system that records any changes to a table that is being replicated. This ensures that SLT replication server can replicate these changes to the target system.

11.What are Transformation rules?
A rule specified in the Advanced Replication settings transaction for source tables such that data is transformed during the replication process. Example you can specify rule to
Convert fields
Fill empty fields
Skip records

12.What happens when you set-up a new configuration?
The database connection is automatically created along with GUID and Mass transfer id (MT_ID).

A schema GUID ensures that configurations with the same schema name can be created.
The Mass transfer ID is used in the naming of SLT jobs and the system can uniquely identify a schema.

13.What factors influence the change/increase the number of jobs?
Number of configurations managed by the SLT replication server
Number of tables to be loaded/replicated for each configuration
Expected speed of initial load
Expected replication latency time.  As a rule of thumb, one BDG job should be used for each 10 tables in replication to achieve acceptable latency times.

14.When to change the number of Data Transfer jobs?
If the speed of the initial load/replication latency time is not satisfactory
If SLT replication server has more resources than initially available, we can increase the number of data transfer and/or initial load jobs
After the completion of the initial load, we may want to reduce the number of initial load jobs

15.What are the jobs involved in replication process?
1. Master Job (IUUC_MONITOR_<MT_ID>)
2. Master Controlling Job (IUUC_REPLIC_CNTR_<MT_ID>)
3. Data Load Job (DTL_MT_DATA_LOAD_<MT_ID>_<2digits>)
4.Migration Object Definition Job (IUUC_DEF_MIG_OBJ_<2digits>)
5.Access Plan Calculation Job (ACC_PLAN_CALC_<MT_ID>_<2digits>)

16.What is the relation between the number of data transfer jobs in the configuration settings and the available BGD work processes?
Each job occupies 1 BGD work processes in SLT replication server. For each configuration, the parameter Data Transfer Jobs restricts the maximum number of data load job for each mass transfer ID (MT_ID).

A mass transfer ID requires at least 4 background jobs to be available:
One master job
One master controller job
At least one data load job
One additional job either for migration/access plan calculation/to change configuration settings in “Configuration and Monitoring Dashboard”.

17.If you set the parameter “data transfer jobs” to 04 in a configuration “SCHEMA1”, a mass transfer ID 001 is assigned. Then what jobs should be in the system?
1 Master Controller job (IUUC_REPL_CNTR_001_0001)
At most 4 parallel jobs for MT_ID 001 (DTL_MT_DATA_LOAD_001_ 01/~02/~03/~04)

Performance:  If lots of tables are selected for load / replication at the same time, it may happen that there are not enough background jobs available to start the load procedure for all tables immediately. In this case you can increase the number of initial load jobs, otherwise tables will be handled sequentially.

For tables with large volume of data, you can use the transaction “Advanced Replication Settings (IUUC_REPL_CONT)” to further optimize the load and replication procedure for dedicated tables.

18.What happens after the SLT replication is over?
The SLT replication server creates 1 user, 4 roles, 2 stored procedures and 8 tables.
1 User
1 Privilege
4 Roles
2 Stored procedures
8 Tables

19.What are the different replication scenarios?
Load, Replicate, Stop, Suspend and Resume.
Before you select any application table, the initial load of the tables DD02L, DD02T & DD08L must be completed as they contain the metadata information.

Load: Starts an initial load of replication data from the source system. The procedure is a one-time event. After it is completed, further changes to the source system database will not be replicated.

For the initial load procedure, neither database triggers nor logging tables are created in the source system. Default settings use reading type 3 (DB_SETGET) with up to 3 background jobs in parallel to load tables in parallel or subsequently into the HANA system.

Replicate: Combines an initial load procedure and the subsequent replication procedure (real time or scheduled).

Before the initial load procedure will start, database trigger and related logging table are created for each table in the source system as well as in SLT replication server.

Stop Replication: Stops any current load or replication process of a table.

The stop function will remove the database trigger and related logging tables completely. Only use this function if you do want to continue a selected table otherwise you must initially load the table again to ensure data consistency.

Suspend: Pauses a table from a running replication. The database trigger will not be deleted from the source system. The recording of changes will continue and related information is stored in the related logging tables in the source system.

If you suspend tables for a long time the size of logging tables may increase and adjust the table space if required.

Resume: Restarts the application for a suspended table. The previous suspended replication will be resumed (no new initial load required).

20.What happens if the replication is suspended for a long period of time or system outage of SLT or HANA system?
The size of the logging tables increases.

21.How to avoid unnecessary logging information from being stored?
Pause the replication by stopping the schema-related jobs.

22.Will the table size in SAP HANA database and in the source system the same?
No as HANA database supports compression.

23.When to go for table partitioning?
If the table size in HANA database exceeds 2 billion records, split the table by using portioning features by using “Advanced replication settings” (transaction IUUC_REPL_CONT, tab page IUUC_REPL_TABSTG).

24.Where do you define transformation rules?
By using “Advanced replication settings” (transaction IUUC_REPL_CONT, tab page IUUC ASS RULE MAP)

25.Are there any special considerations if the source system is non-SAP system?
The concept of trigger-based replication is actually meant for SAP source systems. The main differences are:
There will be a database connection between non-SAP source and SLT system instead of RFC.
Source must have primary key
Tables DD02L, DD02T which contains metadata are just initially loaded but not replicated.
The read modules reside on SLT system.
Tables with database specific formats may need transformation rules before they are replicated.
Only SAP supported databases (with respective DBSL for SAP Net Weaver 7.02) are supported as non-SAP source systems.

26.What are the potential issues in the creation of configuration?
Missing add-on DMIS_2010 in source system
Missing the proper role of SAP_IUUC_REPL_REMOTE for RFC user
( SAP_IUUC_USER for SLT system )
Logon credentials are not correct

27.How can you ensure that data is consistent in source system and HANA system?
Since any changes in the source system is tracked in dedicated logging tables, the replication status for each changed data record is transparent. A entry of logging table is deleted after a successful commit statement from HANA database and this procedure ensures the data consistency between source system and HANA system.

28.Does SLT for SAP HANA support data compression like SAP HANA database?
Yes, this is automatically covered by the RFC connection used for data replication from the SAP source system.

Questions on limits
1.Maximum number of tables in a schema?

2.What can be the maximum table name length?
127 characters

3.What can be the maximum column name length?
127 characters

4.What can be the maximum number of columns in a table?

5.What can be the maximum number of columns in a view?

6.What can be the maximum number of partitions of a column table?

7.What can be the maximum number of rows  in each table?
Limited by storage size RS: 1TB/sizeof(row)
CS: 2^31 * number of partitions

8.In which table you can get the current system limits?

9.Maximum number of jobs you can view the information in the Current tab of Job log?

Questions on SQLScript

1.What is SQLScript?
It is a set of SQL extensions for SAP HANA database which allow developers to push data intensive logic into the database.

2.When should be SQLScript used?
It should be used in cases where other modeling constructs of HANA such as Attribute views or Analytic views are not sufficient.

3.Explain how SQLScript procedure is processed in HANA database?
When a user creates a new procedure, the HANA database query compiler first:
Parse the statements
Check the statement semantic correctness
Optimize the code for Declarative and Imperative logic
Code generation creates Calculation models for Declarative logic and L nodes for Imperative logic
Compiled procedure creates Content in the database Catalog and in Repository.

4.What happens when you compile the procedure?
During compilation, the call to the procedure is rewritten for processing by the calculation engine.

5.What happens when you execute the procedure?
It binds the actual parameters to the calculation models generated in the definition phase.

6.What are the data types supported in SQLScript?
SQLScript allows the definitions of table types and also supports primitive data types such as Integer, Decimal(p,q), Varchar, Blob, Timestamp, etc.

7.What is a table type?
Table types are used to define parameters for a procedure that represent tabular results.
CREATE TYPE tt_publishers AS TABLE ( publisher INTEGER, name VARCHAR(50), price DECIMAL, cnt INTEGER);
CREATE TYPE tt_years AS TABLE ( year VARCHAR(4), price DECIMAL, cnt INTEGER);

8.What is the general syntax used in creating procedure?
CREATE PROCEDURE <proc_name> [(<parameter_clause>)]
[LANGUAGE <lang>] [SQL SECURITY <mode>]
BEGIN <procedure_code> END

9.How to recompile a procedure?

10.Can you specify a default value while creating procedure? Is there any change while calling the procedure?
While calling the procedure, we need to pass ‘Named Parameters’ with token (=>).
CALL my_proc (P1 => 3, out1 => ?)
If you want to specify all the input fields then call statement would be:
CALL my_proc (3, 4, ?)

11.What is the purpose of procedure ‘Call… With Overview’ option?
To write the results of a procedure call directly into a physical table.
CALL my_proc (3, 4, NULL) WITH OVERVIEW;

12.What is the purpose of procedure ‘Call…..In Debug Mode’ option?
It creates the additional debug information during the execution of the procedure. This type of call has additional runtime overhead hence should be used for debugging purposes only.
CALL my_proc (3, 4, NULL) IN DEBUG MODE;

13.What is Table variable?
These are variables with table type which are bound to the value of a physical table, SQL query or a calculation engine plan operator. Table variables are bound using equality operator.

14.What is a scalar variable?
We define scalar variable as IN, OUT, or INOUT and can be referenced anywhere in a procedure.
lt_expensive_books = SELECT title, price, crcy FROM  :it_books
WHERE price > :minPrice AND crcy = :currency;
In above assignment, the variable lt_expensive_books is bound. Variable :it_books refers to an IN parameter of a Table type. :minPrice and :currency refer to IN parameter of a scalar type.

15.What is CE plan operator? What are the different categories?
CE plan operator does the data transformation functionality internally and used in definition of functions. It is an alternate to using SQL statements.
Data Source Access operators that bind a column table or a column view to a table variable. (CE_COLUMN_TABLE, CE_JOIN_VIEW, CE_OLAP_VIEW, CE_CALC_VIEW)
Relational operators that allow a user to bypass the SQL processor during evaluation and directly executed in the calculation engine.
Special extensions implement, e.g., crucial business functions inside the database kernel.

16.What is CE_COLUMN_TABLE operator?
It provides access to an existing column table. It takes the name of the table and returns its content bound to a variable.

ot_books1 = CE_COLUMN_TABLE (“BOOKS”);
ot_books2 = CE_COLUMN_TABLE (“BOOKS”, [“TITLE”, “PRICE”, “CRCY”]);

This example  only works on a column table and does not invoke the SQL processor. It is semantically equivalent to the following:
ot_books3 = SELECT * FROM books;
ot_books4 = SELECT title, price, crcy FROM books;

The function that provide data source access does not allow renaming of attributes.

17.What is CE_JOIN_VIEW operator?
It return results for an existing join view (also known as Attribute view). It takes the name of join view and optional list of attributes as parameters.


18.What is  CE_OLAP_VIEW operator?
It return results for an existing OLAP view (also known as Analytical view). It takes the name of OLAP view and an optional list of key figures and dimensions as parameters. The OLAP view is grouped by dimensions and the key figures are aggregated using the default aggregation of the OLAP view.

out = CE_OLAP_VIEW (“OLAP_view”,[“Dim1”, “kf”]);
Is equivalent to
out = SELECT dim1, SUM(kf) FROM OLAP_view GROUP BY dim1;

19.What is CE_CALC_VIEW operator?
It returns results for an existing calculation view. It takes the name of the calculation view and optionally a projection list of attribute names.

out = CE_CALC_VIEW (“CALC_view”, [“CID”, “CNAME”]);
Is equivalent to
out = SELECT  cid, cname FROM CALC_view;

20.What is CE_JOIN operator?
It calculates a inner join of the given pair of tables on a list of join attributes. Each pair of join attributes must have identical attribute names  else one of them  must be renamed prior to the join.

ot_pubs_books1 = CE_JOIN (:lt_pubs, :it_books, [“PUBLISHER”]);
ot_pubs_books2 = CE_JOIN (:lt_pubs, :it_books, [“PUBLISHER”], [“TITLE”, “NAME”, “PUBLISHER”, “YEAR”]);

Is equivalent to
ot_pubs_books3 = SELECT P.publisher as publisher, name, street, post_code, city,
country, isbn, title, edition, year, price, crcy
FROM :lt_pubs AS P, :it_books as B
WHERE P.publisher = B.publisher;
ot_pubs_books4 = SELECT  title, name, P.publisher as publisher, year
FROM :lt_pubs AS P, :it_books AS B
WHERE P.publisher = B.publisher;

21.What is CE_LEFT_OUTER_JOIN operator?
It calculates the left outer join. Besides the function name the syntax is same as  CE_JOIN.

22.What is CE_RIGHT_OUTER_JOIN operator?
It calculates the right outer join. Besides the function name the syntax is same as  CE_JOIN.

23.What is CE_PROJECTION operator?
It restricts the columns in the table variable and optionally renames columns, computes expression, or applies a filter.

ot_books1 = CE_PROJECTION(:it_books, [“TITLE”, “PRICE”, “CRCY” AS “CURRENCY”], ‘“PRICE” > 50’);
Is equivalent to
ot_books2 =  SELECT  title, price, crcy AS currency
FROM :it_books WHERE price > 50;

24.What is CE_CALC operator?
It evaluates an expression and then bound to a new column

with_tax = CE_PROJECTION(:product, [“CID”, “CNAME”, “OID”, “SALES”,
CE_CALC(‘”SALES” * :vat_rate’, decimal(10,2)) AS “SALES_VAT”],
””CNAME” = ‘:cname”’);
Is equivalent to

with_tax2 = SELECT cid, cname, oid, sales, sales * :vat_rate AS sales_vat
FROM :product
WHERE cname = ‘:cname’;

All columns used in CE_CALC have to be included in the projection list. Another frequent use of CE_CALC is computing row numbers.
CE_CALC(‘rownum()’, integer) AS “RANK”

25.What is CE_AGGREGATION operator?
It groups the input and computes aggregates for each group.
Supported aggregate functions are  count(“column”), sum(“column”), max(“column”), min(“column”).
Use sum(“column”)/count(“column”) to compute the average.

ot_books1 = CE_AGGREGATION(:it_books, [COUNT (“PUBLISHER”) AS CNT], [“YEAR”]);

Is equivalent to
ot_books2 = SELECT COUNT (publisher) as cnt, year FROM :it_books GROUP BY year;

26.What is CE_UNION_ALL operator?
It computes the union of two tables which need to have identical schemas.

ot_all_books1 = CE_UNION_ALL (:lt_books, :it_audit_books);
Is equivalent to
ot_all_books2 = SELECT * FROM :lt_books
SELECT * FROM :it_audit_books;

27.What is special operator?
CE_VERTICAL_UNION and CE_CONVERSION are the special operators which do not have any immediate SQL equivalent.

28.What operator is used to debug SQLScript procedures?
TRACE operaor. It traces the tabular data passed as its argument into a local temporary table and return its input unmodified. The names of the temporary tables can be retrieved from the SYS.SQLSCRIPT_TRACE view.

Example: out = TRACE (:input);

29.How to set-up tracing?
From the Administration perspective, navigate to tab “Trace Configuration” . In order to change settings, you need to have system privileges “TRACE ADMIN” and “INFILE ADMIN”.

30.What is the difference between BREAK and CONTINUE?
Break means loop should stop processing, CONTINUE means loop should stop processing the current iteration and immediately start processing the next iteration.

31.What is Cursor?
It is used to fetch single rows from the result set returned by a query.
v_isbn VARCHAR(20);
CURSOR c_cursor1 (v_isbn VARCHAR(20)) FOR
SELECT isbn, title, price, crcy FROM books WHERE isbn = :v_isbn
ORDER BY isbn;
OPEN c_cursor1(‘978-3-86894-012-1’);
IF c_cursor1::ISCLOSED THEN CALL ins_msg_proc(‘WRONG: cursor not open’);
ELSE CALL ins_msg_proc(‘OK: cursor open’);
FETCH c_cursor1 INTO v_isbn, v_title, v_price, v_crcy;
IF c_cursor1::NOTFOUND THEN CALL ins_msg_proc(‘WRONG: cursor contains no valid data’);
ELSE CALL ins_msg_proc(‘OK: cursor contains valid data’);
CLOSE c_cursor1;

32.How to loop cursor over result sets?
Using FOR loop.
v_isbn VARCHAR(20) := ”;
CURSOR c_cursor1 (v_isbn VARCHAR(20)) FOR
SELECT isbn, title, price, crcy FROM books ORDER BY isbn;
FOR cur_row as c_cursor1 DO
CALL ins_msg_proc(‘book title is: ‘ || cur_row.title);

Questions on Modeler
1.What are the two developer roles in HANA SPS05?
The two developer roles are Modeler and Application Programmer.

Modeler:  modeler is concerned with the definition of model and schemas used in the SAP HANA, the specification and definition of tables, views, primary keys, indexes, partitions and inter-relationship of the data, designing and defining authorization and access control through the specification of privileges, roles and users and generally uses the perspective “Administration Console” and “Modeler”.

Application Programmer: Programmer is concerned with building SAP HANA applications which are designed based on MVC (model-view-controller) architecture and generally uses the perspective “SAP HANA Development”.

2.Explain HANA database Architecture (SP05)?
Clients connect to the database system which forms a session within the database in the form of SQL statements. In the HANA database, each SQL statement is processed in the context of a transaction. New sessions are assigned to a new transaction.

Traditional database applications uses JDBC and ODBC interface to communicate with the database management system over a network connection and application uses SQL to manage and query the data stored in the database. In the HANA database Index server is the main component of database management which contains the actual data stores and the engines for processing the data. The index server processes incoming SQL or MDX statements in the context of transaction.

The Transaction manager coordinates database transactions, and keeps track of running and closed transactions. When a transaction is committed or rolled back, the transaction manager informs the involved storage engines about this event so they can execute necessary actions.

The HANA database has its own scripting language called SQLScript that is designed to enable optimization and parallelization. HANA supports the Business Functional Library (BFL) and Predictive Analysis Library (PAL) and can be called directly from within SQLScript. It also supports the development of programs written in R language.

SQL and SQLScript are implemented using a common infrastructure of Built-in functions. That have access to various meta definitions such as definitions of relational tables, columns, views, and indexes, definitions of SQLScript procedures.  This Metadata is stored in one common catalog (row store or column store).

The Persistence layer ensures that the database after a restart is restored to the most recent committed state. It uses a combination of write-ahead logs, shadow paging and save points. The persistence layer also contains Logger that manages the transaction log.
The Index server uses the Preprocessor Server for analyzing the text data and extracting the information based on text search capabilities. The Name Server knows where the components are running and which data is located on which server. The Statistics Server collects information about status, performance and  resource consumption from other servers in the system.

3.What is SAP XS (Extended Application Service)?
SAP HANA XS provides end-to-end support for web-based applications .

4.What are Development objects?
The building blocks of SAP HANA applications are called development objects.

5.What is Repository?
The HANA Repository is storage system for development objects and is built into SAP HANA.
The repository supports Version control, Transport, and Sharing of objects between multiple developers. We can add objects to the repository, update the objects, publish the objects, and compile these objects into runtime objects.

6.What are the different perspectives available in HANA?
Modeler: used for creating various types of views and analytical privileges.
SAP HANA Development: Used for programming applications for creating development objects to access or update data models such as Server-side Java script or HTML files.
Administration: Used to monitor the system and change settings.
Debug: Used to debug code such as SQLScript (.procedure files) or Server-side Java script (.xsjs files).

To open a perspective, go to Window → Open Perspective.

7.Before starting development work in SAP HANA studio, What are the roles a user should have on SAP HANA server ?
Modeling, Content_Admin.

8.What is a Delivery Unit?
Delivery unit (DU) is a container used by the Life Cycle Manager (LCM) to transport repository objects between the SAP HANA systems. The name of DU must contain only capital letters (A-Z), digits (0-9) and underscores (_).

9.What is a workspace?
The place where you work on project-related objects is called a repository workspace.

10.What is a package and its types?
Package is used to group together related content objects in SAP HANA studio. By default it creates Non-structural.
Type                            Description
Structural            Package only contains sub-packages. It cannot contain repository objects.
Non-Structural    Package contains both repository objects and sub-packages.

11.What are the default packages delivered with the repository?

12.What can be the maximum length of a package name?
190 characters including dots.   Example: RajKumar.pkg123

13.What are package privileges?
REPO.READ:  Read access to the selected package and design-time objects (both native and imported).
REPO.EDIT_NATIVE_OBJECTS:  Authorization to modify design-time objects in packages originating in the system the user is working in.
REPO.ACTIVATE_NATIVE_OBJECTS:  Authorization to activate/reactivate design-time objects in package originating in the system the user is working in.
REPO.MAINTAIN_NATIVE_PACKAGES: Authorization to update or delete native packages or create sub-packages of packages  originating in the system in which the user is working.

14.How each object is uniquely identified in the repository?
Each object is uniquely identified by the combination of package name, object name and object type.

15.Can multiple objects of the same type can have the same object name?
Yes, only when they belong to different packages.

16.What are the different tasks you can perform in setting up the basis persistence model for SAP HANA XS?
Creating Schema, Creating Table, Creating View, Creating Sequence and Importing table content.

17.What are the different tasks you can perform in modeler perspective?
Import metadata, Load data, Create packages, Create information views, Create Procedures, Create Analytical privileges, Import SAP NetWeaver BW objects, Create Decision Tables, Import and Export objects.

18.What are the supported object types in modeler perspective?
Attribute views, Analytical views, Calculation views, Analytical privileges, Procedures, Decision tables, Process Visibility Scenario.

19.What are the different modeler preferences and how do you set?
You can set the modeler preferences by choosing the menu Window → Preferences → Modeler  (or) Quick launch → Manage Preferences.

20.Why to configure Import server?
In order to load data data from external sources to SAP HANA we need to establish a connection with the server. To connect, we need to provide details of Business Objects Data Services repository and ODBC drivers. Once the connection is established, we can import the tables definition and then load data into table definitions.

Quick launch – Configure Import Server
Enter the IP address of the server from which you want to import data
Enter the repository name
Enter the ODBC data source, and choose OK.

21.How to Import table definitions?
If you want to import all table definitions, Go to
File menu → Choose Import
Expand the  SAP HANA Content node
Choose “Mass Import of Metadata” and choose next
Select the target system where you want to import all the table definitions, and choose next
In the Connections Details Dialog , enter the user name and password of the target system
Select the required source system and choose Finish.
Note: If you want to import selective table definitions use “Selective Import of Metadata”.
22.How to load data into tables?
Quick Launch → Data Provisioning
Choose Source
Choose Load (for Initial load) or Replicate (for data replication)
Select the required tables to load or replicate
Click Finish.

23.How to upload data from Flat files?
File menu → Import
In ‘Select an Import Source’ section, expand the ‘SAP HANA Content’ node
Select ‘Data from Local file’ and choose Next
Select the Target system to which you want to import the data using Flat file, choose Next
In ‘Define Properties Import Page’ browse the file containing the data
Select ‘New’ option (If you want to load the data into a new table) or
Select the ‘Existing’ option (If you want to append the data to an existing table)
Click Finish.

24.How to copy standard content delivered by SAP?
Quick Launch → Mass Copy
Create a mapping between source package and target package
Choose Next to view the summary
Click Finish to confirm content copy.

25.What is Schema mapping? How do you do Schema mapping?
Schema mapping is done when the physical schema in the target system is not the same as the physical
schema in the source system.

Quick Launch → Schema Mapping
Choose Add
Create a mapping in the Target system between the Authoring schema and Physical schema
Click OK.

Note: Schema mapping only applies to references from repository objects to catalog onjects. It is not intended to be used for repository to repository references.

26.In which configuration table, the mapping between authoring and physical schema is stored?

27.What’s the purpose of Generating Time Data?
If you model a time attribute view without generating time data, an empty view will be shown when you use data preview. To generate Time Data go to
Quick Launch → Generate Time Data
If your financial year is from January to December, Choose ‘Calender Type’ as Gregorian else Fiscal
Click Generate.

28.In which configuration table the generated time data information will be stored?
For Gregorian calendar type (SYS_BI)
For Fiscal

29.What is an Attribute?
Attribute represents the descriptive data used in modeling. Example: City, Country, etc.

30.What is a Simple Attribute?
Simple attributes are individual analytical elements that are derived from the data foundation. For example Product_ID, Product_Name are attributes of a Product subject area.

31.What is a Calculated Attribute?
Calculated attributes are derived from one or more existing attributes or constants. For example deriving the full name of a customer (first name and last name), assigning a constant value to an attribute that can be used for arithmetic calculations.

32.What is a Private Attribute?
Private attributes used in an analytical view allow you to customize the behavior of an attribute for only that view. For example if you create an analytical view and you want a particular attribute to behave differently than it does in the attribute view to which it belongs, you can define it as a private attribute.

33.What is a Measure?
Measures are simple measurable analytical elements and are derived from Analytic and Calculation views.

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