Most Recent SAP C_HANADEV_18 Exam Dumps

To run an SQL statement against the SAP HANA database from a Node.js application, you need to use the @sap/hdbext module. This module provides a wrapper for the SAP HANA client for Node.js, which enables you to connect to the SAP HANA database and execute SQL statements. You can use this module to create a database connection pool, execute queries, fetch results, and handle errors. The other options are not correct because:

A) @sap/hdi: This module provides functions to interact with the SAP HANA Deployment Infrastructure (HDI), which enables you to create and manage database artifacts, such as tables, views, procedures, and functions, using the HDI container service. You can use this module to deploy, undeploy, and access HDI containers, but not to run SQL statements against the SAP HANA database.

B) @sap/xsenv: This module provides functions to load service configuration and credentials from the environment variables of the SAP Cloud Platform or the SAP HANA XS Advanced Model. You can use this module to access the SAP HANA database service information, such as host, port, user, password, and schema, but not to run SQL statements against the SAP HANA database.

C) @sap/xssec: This module provides functions to handle authentication and authorization for Node.js applications using the User Account and Authentication (UAA) service and the XSUAA service. You can use this module to verify JWT tokens, check scopes, and obtain user information, but not to run SQL statements against the SAP HANA database.

SAP HANA Developer Guide for SAP HANA Web IDE, Chapter 5, Section 5.3

SAP HANA Developer Guide for SAP HANA Web IDE, Chapter 5, Section 5.4

SAP HANA Developer Guide for SAP HANA Web IDE, Chapter 5, Section 5.5

SAP HANA Developer Guide for SAP HANA Web IDE, Chapter 5, Section 5.6

Dynamic SQL allows you to construct and execute SQL statements at run time, using variables and expressions that may not be supported in SQLScript. However, it also has some drawbacks, such as:

Limited opportunities for optimization: The SQL statement is potentially recompiled every time it is executed, which may affect the performance and resource consumption. The optimizer cannot use static information, such as data types, cardinalities, or indexes, to generate an optimal execution plan. The statement may also bypass the SQL cache, which stores the results of frequently executed queries for faster retrieval.

Additional SQL execution privileges are required: The user who executes the dynamic SQL statement must have the necessary privileges to access the objects and operations referenced in the statement. This may pose a security risk, as the user may gain access to sensitive data or perform unauthorized actions. To prevent SQL injection attacks, the dynamic SQL statement should be validated and sanitized before execution.

The other options are incorrect, because:

It is possible to bind the result of a dynamic SQL statement to a SQLScript variable, using the INTO clause of the EXECUTE IMMEDIATE statement. For example,EXECUTE IMMEDIATE 'SELECT COUNT(*) FROM 'TABLE'' INTO lv_count;

It is possible to use SQLScript variables in a dynamic SQL statement, using the USING clause of the EXECUTE IMMEDIATE statement. For example,EXECUTE IMMEDIATE 'SELECT * FROM 'TABLE' WHERE 'COLUMN' = ?' USING lv_value;

According to the SAP HANA Developer Guide, a multi join is a join that can be defined only with multi-column join in calculation views. A multi join allows you to join multiple data sources using multiple join conditions. You can specify the join type, the join cardinality, and the join columns for each pair of data sources. A multi join is useful when you need to join data sources that have complex relationships or different granularities. The other options are incorrect, because:

A dynamic join is a join that can be defined with either single-column join or multi-column join in calculation views. A dynamic join allows you to join two data sources using a join condition that is evaluated at run time based on the user input. You can specify the join type, the join cardinality, and the join columns as parameters or variables.

A text join is a join that can be defined with either single-column join or multi-column join in calculation views. A text join allows you to join a data source with a text table that contains language-dependent descriptions of the data. You can specify the join type, the join cardinality, and the join columns as well as the language column and the language code.

A temporal join is a join that can be defined with either single-column join or multi-column join in calculation views. A temporal join allows you to join a data source with a history table that contains time-dependent versions of the data. You can specify the join type, the join cardinality, and the join columns as well as the validity columns and the validity period.

The SAP HANA system views that contain information about the object ownership are SCHEMAS and ROLES.The SCHEMAS view provides information about the schemas in the database, including the owner of each schema1.The ROLES view provides information about the roles in the database, including the owner of each role2.The object ownership indicates who has the right to grant or revoke privileges on the object, or to alter or drop the object3.

The other two options, TABLES and OBJECTS, do not contain information about the object ownership.The TABLES view provides information about the tables in the database, but not the owner of each table4.The OBJECTS view provides information about the objects in the database, such as views, procedures, functions, etc., but not the owner of each object5.Reference:1:SCHEMAS System View | SAP Help Portal2:ROLES System View | SAP Help Portal3:Object Ownership | SAP Help Portal4:TABLES System View | SAP Help Portal5:OBJECTS System View | SAP Help Portal

To create a calculation view in a multi-target application, you need to use the SAP Web IDE for SAP HANA, which is a web-based development environment that supports the full development lifecycle of SAP HANA applications. The SAP Web IDE for SAP HANA provides graphical and code-based editors for creating calculation views, as well as other database artifacts, such as tables, views, procedures, functions, and more. You can also use the SAP Web IDE for SAP HANA to create and deploy multi-target applications, which are modular applications that consist of multiple components, such as database modules, Node.js modules, Java modules, HTML5 modules, etc. The other options are incorrect because the SAP HANA database explorer, the SAP HANA Web-based Development Workbench, and the SAP HANA studio do not support the creation of calculation views in a multi-target application. The SAP HANA database explorer is a web-based tool that allows you to browse, manage, and query SAP HANA databases, but not to create or edit database artifacts. The SAP HANA Web-based Development Workbench is a deprecated tool that was used to create and edit SAP HANA XS classic applications, but not multi-target applications. The SAP HANA studio is a desktop tool that was used to create and edit SAP HANA native applications, but not multi-target applications.Reference:

SAP Web IDE for SAP HANA- SAP Help Portal

Creating Calculation Views- SAP Help Portal

Multi-Target Applications- SAP Help Portal

SAP HANA Database Explorer- SAP Help Portal

SAP HANA Web-based Development Workbench- SAP Help Portal

[SAP HANA Studio] - SAP Help Portal