C_HAMOD_2404 SAP Certified Associate - Data Engineer - SAP HANA Questions and Answers

The input parameters of calculation view B might not be proposed as source parameters because they are already mapped in another calculation view. SAP HANA restricts the re-mapping of input parameters that have already been assigned to maintain consistent logic and avoid conflicts. When input parameters are pre-mapped in one calculation view, they cannot be reused as source parameters elsewhere without unlinking the prior mapping.

Apruning configuration tableis used to define conditions for pruningdata sources in unionswithin a calculation view. Pruning removes unnecessary sources from the query execution, optimizing performance by reducing data processed.

Given the diagram (assumed context) and the analytic privileges (P1 and P2):

Data visible forUS with P1is allowed, as P1 explicitly includes this region.

No other combinations are permissible based on the defined privileges and hierarchy of calculation views.

This restricts the output toUS for P1 only.

Table Function (A):Graphical calculation views can incorporate table functions to integrate custom data processing logic written in SQLScript.

Row Table (C):Row tables can be included directly as data sources in graphical calculation views, providing flexibility in accessing structured data.

Options B (Procedure) and D (Scalar Function) are incorrect as they cannot be directly used as sources in graphical calculation views. Procedures and scalar functions serve different purposes in SAP HANA.

If the account number is not masked in calculation view A, it indicates that masking was not defined in calculation view A. Masking rules must be explicitly defined at every level where data is exposed, as they are not inherited from underlying views.

A calculation view of data categoryDIMENSIONwith typeTIMEprovides time-related navigation possibilities, such as exploring data by year, month, week, or day. This is essential for enabling time-based reporting and analysis.

When creating a calculation view that accesses a table in an external schema:

A. Synonym: Synonyms act as aliases to access external schema objects. They are required to integrate external tables into the calculation view.

D. Authorization: You need appropriate schema authorizations to access the external table through the synonym.

A remote source (B) is used for accessing remote systems, and an SQL view (C) is not necessary for this scenario.

The key steps to implement currency conversion in a calculation view are:

Assign Semantic Type:Ensure that the column has the correct semantic type for currency conversion.

Enable the Measure for Conversion:Mark the measure as convertible.

Choose Client, Source, and Target Currencies:Define the currencies involved in the conversion.

Choose Conversion Date and Rate Type:Specify the date and the type of conversion rate (e.g., average, spot rate).

This structured process ensures accurate and consistent currency conversions in your data models.(Reference: SAP HANA Currency Conversion Guide)

To fill the input parameters of a table function in a calculation view:

Define constant values (A):Assigning constants directly ensures that static values are passed to the table function.

Map columns from lower nodes (D):Input parameters can dynamically take values from columns in lower-level nodes.

Create and map an input parameter (E):Defining an input parameter in the calculation view and mapping it to the table function provides flexibility and parameterization for the logic.

Options B and C are not valid as procedures or hierarchy nodes are not applicable in this context.(Reference: SAP HANA Calculation View Modeling Guide)

To improve the performance of joins in aCUBE calculation view, the following approaches are recommended:

A. Specify the join cardinality: Defining the cardinality helps the optimizer understand the data relationships and execute the join efficiently.

B. Limit the number of joined columns: Reducing the number of columns involved in the join minimizes data processing overhead, improving query performance.

Using afull outer join(C) or avoiding inner joins (D) are less performance-optimized in most scenarios.

If static cache results are not being used, one possible reason is the absence of a defined filter in the cache settings. Filters ensure that specific data subsets are preloaded into the cache, and without them, the cache may not align with the query requirements.

Ananonymous blockin SQLScript allows you to test your code without generating a persistent logic container (such as a procedure or function). This is particularly useful for quickly validating or debugging SQLScript logic in a temporary execution context.

Parameter mapping in SAP HANA calculation views serves several purposes:

To push down filters to the lowest level calculation views:By mapping input parameters from a higher-level calculation view to those in underlying views, filters applied at the top level are propagated down to the base views. This ensures that data is filtered as early as possible in the data processing pipeline, reducing the volume of data transferred and processed, thereby enhancing performance.

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To pass variable values to external value help views:When using external views to provide value help (i.e., lists of possible values) for variables or input parameters, parameter mapping allows the values entered by the user to be passed to these external views. This enables dynamic and context-sensitive value help, improving the user experience by presenting relevant options based on prior selections.

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Options B and D are not correct in this context:

To convert the data types of input parameters:Parameter mapping does not inherently perform data type conversion. Data type consistency must be ensured when defining input parameters and their mappings.

To assign variables to one or more attributes:Parameter mapping is not used to assign variables to attributes; rather, it links input parameters and variables between different calculation views or external sources.

Git is used in calculation view modeling to:

C. Manage versions of source files: It provides version control, enabling tracking and rollback of changes in calculation views and other project artifacts.

While collaboration (D) and build automation (B) are benefits of Git in general, the primary purpose in this context is version management. Displaying dependencies (A) is unrelated to Git.

CREATE VIRTUAL TABLE on the remote source (B):This privilege allows the creation of virtual tables that reference remote tables in the target schema.

CREATE ANY on the target schema (C):This privilege ensures that virtual tables can be created in the specified target schema.

Option A (SELECT on the source object) and D (ALTER on the remote source) are not sufficient or required for creating a virtual table.

Table functions in SAP HANA are used for read-only operations and cannot includeDML (Data Manipulation Language)statements such asDELETE,INSERT, orUPDATE.

C. Your table function includes a DELETE statement: This is the reason for the deployment failure, as DML operations are not allowed in table functions.

Input parameters (A), table types (B), and references to scalar functions (D) do not cause deployment issues unless they are incorrectly defined, which is not the case here.

To assign a user-provided service to your database module in an XS Advanced project, you configure it in the.yamlfile. This file is used to define the bindings between the project modules and the required services, such as user-provided services for accessing external schemas.

Table partitioning in SAP HANA is used to enhance performance and scalability. The main reasons are:

B. To overcome the 2 billion record limit: Partitioning allows the table to handle more than the 2 billion records that are the limit for non-partitioned tables.

D. To improve query performance when accessing large column tables: Partitioning splits the table into manageable parts, allowing parallel processing and improving query performance for large datasets.

TheDEPRECATEDsetting in a calculation view serves the following purposes:

A. To warn developers that the calculation view is no longer supported: Indicates that the view is outdated and should not be relied upon.

B. To indicate that it should not be used as a data source to other calculation views: Prevents new dependencies from being created on the deprecated view.

This setting does not lock the view (C) or redirect queries (D).