SAP C_HANADEV_18 Exam With Confidence Using Practice Dumps

The SAP Web IDE for SAP HANA is a web-based development tool that allows you to create and manage multi-target applications (MTAs) that use the SAP HANA Deployment Infrastructure (HDI). The SAP Web IDE for SAP HANA is itself an XS advanced application that runs on the XS advanced runtime and can be accessed via a URL. To retrieve the URL for the SAP Web IDE for SAP HANA, you can use the following XS advanced tools:

• XS advanced Controller Start Screen: This is a web-based tool that provides an overview of the XS advanced environment and the available applications and services. You can access the XS advanced Controller Start Screen by opening the URL https://:330/ in a browser, where is the host name of your SAP HANA system and is the instance number of your SAP HANA system. From the XS advanced Controller Start Screen, you can see the list of applications and their URLs under the Applications tab. You can find the SAP Web IDE for SAP HANA application by its name (webide) and click on its URL to open it in a new tab.
• XS Advanced command-line client tool: This is a command-line tool that allows you to perform various operations on the XS advanced environment and the applications and services. You can access the XS Advanced command-line client tool by opening a terminal and entering the command xs. To retrieve the URL for the SAP Web IDE for SAP HANA, you need to first log in to the XS advanced environment by entering the command xs login and providing your credentials. Then, you need to switch to the SAP space by entering the command xs target -s SAP, where the SAP Web IDE for SAP HANA application is deployed. Finally, you need to list the applications and their URLs by entering the command xs apps. You can find the SAP Web IDE for SAP HANA application by its name (webide) and copy its URL to open it in a browser.

The following tools are not used to retrieve the URL for the SAP Web IDE for SAP HANA, but for other purposes:

• Runtime tool: This is a web-based tool that allows you to monitor and manage the runtime components of the XS advanced environment, such as applications, services, processes, and logs. You can access the Runtime tool by opening the URL https://:332/ in a browser, where is the host name of your SAP HANA system and is the instance number of your SAP HANA system. From the Runtime tool, you can see the status and details of the applications and services, but not their URLs.
• Organization and Space Management tool: This is a web-based tool that allows you to create and manage the organizational units of the XS advanced environment, such as organizations and spaces. You can access the Organization and Space Management tool by opening the URL https://:331/ in a browser, where is the host name of your SAP HANA system and is the instance number of your SAP HANA system. From the Organization and Space Management tool, you can see the list of organizations and spaces and their quotas and roles, but not the applications and their URLs.

References:

• [SAP HANA Deployment Infrastructure Reference], Chapter 5: HDI with XS Advanced, Section 5.1: Developing with the SAP Web IDE for SAP HANA, Subsection 5.1.1: Create a Project, p. 101.
• [SAP HANA Platform Documentation], SAP HANA Developer Guide for SAP HANA XS Advanced Model, Chapter 2: Getting Started with SAP Web IDE for SAP HANA, Section 2.1: Creating a Project, p. 17.

 The UNNEST operator is an SQL Script element that transforms a set of arrays into an intermediate table variable. The UNNEST operator takes one or more array expressions as input and returns a table variable with one or more columns, each corresponding to an array expression. The table variable has as many rows as the maximum length of the input arrays, and the values in each column are taken from the corresponding array elements. If an input array has fewer elements than the maximum length, the missing values are padded with NULLs. The UNNEST operator can be used in the FROM clause of a SELECT statement, or in the INTO clause of a SET statement.

For example, suppose you have two arrays A and B, where A = [1, 2, 3] and B = [4, 5]. You can use the UNNEST operator to transform them into a table variable T as follows:

SET T = UNNEST (A, B);

The result is:

Table

A

B

1

4

2

5

3

NULL

You can also use the UNNEST operator to transform an array of complex types, such as structs or tables, into a table variable with multiple columns. For example, suppose you have an array C of struct type, where C = [{x: 1, y: 2}, {x: 3, y: 4}]. You can use the UNNEST operator to transform it into a table variable U as follows:

SET U = UNNEST (C.x, C.y);

The result is:

Table

C.x

C.y

1

2

3

4

The following SQL Script elements are not used to transform a set of arrays into an intermediate table variable, but for other purposes:

• OSET: This is a data type that represents an ordered set, which is a collection of distinct values that preserves the order of insertion. OSETs can be used to store and manipulate ordered data, such as ranking or sorting results. OSETs can be created by using the OSET constructor or the OSET_AGG aggregate function.
• ARRAY: This is a data type that represents an array, which is a collection of values that can have duplicates and are accessed by their position. Arrays can be used to store and manipulate complex or multi-dimensional data, such as matrices or tensors. Arrays can be created by using the ARRAY constructor or the ARRAY_AGG aggregate function.
• UNSET: This is not a valid SQL Script element, but a possible typo for UNNEST.

References:

• [SAP HANA Platform Documentation], SAP HANA SQL and System Views Reference, Chapter 2: SQL Data Types and Literals, Section 2.2: Collection Types, Subsection 2.2.2: Array Type, pp. 36-38.
• [SAP HANA Platform Documentation], SAP HANA SQL and System Views Reference, Chapter 2: SQL Data Types and Literals, Section 2.2: Collection Types, Subsection 2.2.3: Ordered Set Type, pp. 38-40.
• [SAP HANA Platform Documentation], SAP HANA SQL and System Views Reference, Chapter 3: SQL Expressions, Section 3.6: Collection Expressions, Subsection 3.6.2: UNNEST Operator, pp. 69-70.

 According to the SAP HANA SQLScript Reference, the following statements can be used when implementing transaction management logic in SQLScript using savepoints:

• Savepoint: Creates a savepoint with a specified name within the current transaction. A savepoint marks a point in the transaction that can be rolled back to without affecting the rest of the transaction. For example, SAVEPOINT sp1;
• Rollback to savepoint: Rolls back the current transaction to the specified savepoint. All changes made after the savepoint are undone, but the transaction remains active. For example, ROLLBACK TO SAVEPOINT sp1;
• Release savepoint: Releases the specified savepoint and all subsequent savepoints. The released savepoints are no longer valid and cannot be rolled back to. For example, RELEASE SAVEPOINT sp1;

The other options are incorrect, because:

• Reverse savepoint is not a valid statement in SQLScript. There is no such statement in the SAP HANA SQLScript Reference.
• Alter system savepoint is not a statement that can be used in SQLScript, but a statement that can be used in SQL. It triggers a savepoint operation for the entire database system, not for a specific transaction. It is used for administrative purposes, such as backup and recovery, not for transaction management logic.

References: SAP HANA SQLScript Reference, Chapter 6, Section 6.4.2, page 2111.