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9 Writing Server-Side JavaScript Applications SAP HANA Extended Application Services (SAP HANA XS) provide applications and application developers with access to the SAP HANA database using a consumption model that is exposed via HTTP. In addition to providing application-specific consumption models, SAP HANA XS also host system services that are part of the SAP HANA database, for example: search services and a built-in Web server that provides access to static content stored in the SAP HANA repository. The consumption model provided by SAP HANA XS focuses on server-side applications written in JavaScript. The server-side JavaScript applications can make use of a powerful set of specially developed API functions, for example, to enable access to the current request session or the database. This section describes how to write a server-side JavaScript application that enables you to expose data, for example, using a Web Browser or any other HTTP client. 9.1 Data Access with JavaScript in SAP HANA XS In SAP HANA Extended Application Services, the persistence model (for example, tables, views and stored procedures) is mapped to the consumption model that is exposed via HTTP to clients - the applications you write to extract data from SAP HANA. You can map the persistence and consumption models in the following way: ● Application-specific code Write code that runs in SAP HANA application services. Application-specific code (for example, server-side JavaScript) is used in SAP HANA application services to provide the consumption model for client applications. Applications running in SAP HANA XS enable you to accurately control the flow of data between the presentational layer, for example, in the Browser, and the data-processing layer in SAP HANA itself, where the calculations are performed, for example in SQL or SQLScript. If you develop and deploy a server-side JavaScript application running in SAP HANA XS, you can take advantage of the embedded access to SAP HANA that SAP HANA XS provides; the embedded access greatly improves end-to-end performance. 9.2 Writing JavaScript Code 9.2.1 Server-Side JavaScript in SAP HANA XS SAP HANA application services (XS server) supports server-side application programming in JavaScript. The server-side application you develop can use a collection of JavaScript APIs to expose authorized data to client requests, for example, to be consumed by a client GUI such as a Web browser or any other HTTP client. 212 P U B L I C © 2012 SAP AG. All rights reserved. SAP HANA Developer Guide Writing Server-Side JavaScript Applications
The functions provided by the JavaScript APIs enable server-side JavaScript applications to perform the following actions: ● Interact with the SAP HANA XS runtime environment ● Directly access SAP HANA database capabilities Note: Unlike OData and XMLA, the JavaScript API enables you not only to expose data but to update, insert, and delete data, too. JavaScript programs are stored in the repository along with all the other development resources. When the programs are activated, the code is stored in the repository as a runtime object. 9.2.2 JavaScript Editor You can write server-side JavaScript using the SAP HANA studio JavaScript editor, which provides syntax validation, code highlighting and code completion. When you edit a JavaScript file within an XS JavaScript project, the editor automatically has a reference to the XS JavaScript API. You can access the API’s objects by entering $, following by a period (.), and the objects are available, as in the following example. JSLint Validations The JavaScript editor includes the JSLint open-source library, which helps to validate JavaScript code. The editor highlights any code that does not conform to the JSLint standards. To configure the JSLint library and determine which validations are performed, go to: Windows Preferences JSLint In the preferences window, each JSLint setting is followed by the corresponding JSLint command name, which you can use to lookup more information on the JSLint Web site. Related Links JSLint Web Site SAP HANA Developer Guide Writing Server-Side JavaScript Applications P U B L I C © 2012 SAP AG. All rights reserved. 213
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SAP HANA Appliance Software SPS 05
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4.3.1 SAP HANA Repository Packages
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6.5.12 Searching Tables, Models and
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12.2 Authentication Overview. .....
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2 SAP HANA SAP HANA is an in-memory
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With a scanning speed of several gi
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SAP HANA greatly extends the tradit
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2.4 Refactoring SAP HANA Based Appl
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In either case, as a developer you
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For this scenario, you may need to
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Object Description File Extension M
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Committing the file saves it in the
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● Security: Contains the roles an
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The view essentially is a list of r
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Action Description ● Creates a ne
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● Debug Session: The debug sessio
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○ MODELING ○ CONTENT_ADMIN 3.5.
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4.1 Setting up Delivery Units A del
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Related Links ○ In the text boxes
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4.2.2 Creating a Repository Workspa
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3. Open the Project Explorer view.
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1. Create a package Packages are ne
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● Non-Structural Package contains
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In the New Package dialog, enter in
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Maintaining Translation Details [pa
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Note: Exposed package content can i
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Application-Access File Keyword Opt
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Note: You can disable authenticatio
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| |---2011... |---subpackage1 | |--
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You use the mime_mapping keyword to
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1. If you have not already done so,
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2. Select Open Development. The def
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3. Select Next. 4. Enter a user nam
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In the SAP HANA Repositories view,
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Since you only have one workspace,
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6. Add a file called .xsaccess (no
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SAP HANA Developer Guide Setting Up
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5.1 Schema Relational databases con
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creation, but can have any number o
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If you want to define a transportab
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ool public(default=true); optional
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5.9.1 Table-Import Model The table-
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○ The key area of the input value
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{name = "Forename"; sqlType = VARCH
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var pstatement1 = conn.prepareState
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Note: The following example is for
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You can perform the following tasks
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Requirement Preference Substeps Not
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a) Log on to the Central Management
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4. In the Target System section, se
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Remember: Schema mapping only appli
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) Select the required granularity c
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● Hierarchies Note: In the Semant
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Restriction: It is not allowed to a
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Related Links ● When you open an
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○ Select the Data Foundation node
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a) In the Output panel of the Logic
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Related Links Note: If an active ve
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Note: Definer's right: If you want
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Optional Step: Creating Calculated
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4. Choose OK. Activate Note: 1. If
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a. To map the source to the target
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a. Enter a name and description. b.
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example, to calculate Discount for
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○ Name Path - the unique node ID
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specifying target currency and dese
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● In the Activate dialog, you can
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Note: You can also create a join be
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● You can choose to create parame
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● A decision table is based on in
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Objects in edit mode in other works
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shown. You can apply a filter for p
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Type Description Calculation View G
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3. From the context menu, choose Da
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Function Syntax Purpose hextoraw st
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Function Syntax Purpose daysbetween
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6.5.13 Setting Keyboard Shortcuts Y
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case, the name of calculation view
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The generated information models an
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● CALL: Calls a procedure. For ex
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Page 169 and 170: Entity Sets This construct allows y
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Page 173 and 174: $count This request allows you to r
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Page 179 and 180: ● Sample JSON Output: $top This o
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Supported Data Types Fuzzy search w
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option2=value2')) ORDER BY score DE
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Name of Option Short Name maxDateDi
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TEXT and SHORTTEXT TEXT and SHORTTE
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2. Perform the search on two column
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Rule 2 - House Numbers or House Num
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col1 NVARCHAR(20) FUZZY SEARCH MODE
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2. Country codes are standardized t
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Postcode 1 Postcode 2 Score Remarks
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WHERE CONTAINS(postcode, '1234', FU
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PHRASE is similar to AND but restri
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Tokens=input')) ORDER BY score DESC
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)) ORDER BY score DESC, id; SCORE I
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Option textSearch The textSearch op
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Fuzzy Search with Stopwords Usage S
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Stopword Example CREATE COLUMN TABL
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Stopword ltd The stopwords will not
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Column Name Type Primary Key Descri
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Only one of these errors is allowed
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2000-01-11 -> 0.96 2000-01-12 -> 0.
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This deletes the node and all its c
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Hofmann -- specifies the input valu
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SCORE ID COMPANYNAME 0.88 6 xabc 0.
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advanced customizing and layout of
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Example: http://hana1.acme.corp:800
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Along with the full text index, you
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11.3.7 Defining the Page Layout Now
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switchbox Parameter Name Default Va
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11.3.9 Defining the Layout of Resul
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12.2 Authentication Overview Authen
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Secondly, roles created as design-t
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Caution: Theoretically, a user with
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Example: role :: { catalog schema "
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12.4 Privileges SAP HANA offers var
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Authorization to update or delete n
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● Activity ● Validity ● Attri
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The SAP HANA modeler automatically
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Runtime Authorization Check of Anal
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Implications of Creating Analytic P
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Now when a database user requests a
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If you create restrictions on colum
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12.4.6 Granting Privileges to Users
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The location of the application-des
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For example, you need to plan, mana
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13.4 Importing Delivery Units Impor
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4. Download translated text to the
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14 Using Database Client Interfaces
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1. In a command line, run the follo
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The port should be 315, for example
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The first column shows the field na
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3. In the Connection tab of the Dat
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SAP HANA supports the following Mic
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Function Description Avg Returns th
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Function Description MembersAscenda
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○ MEMBERS_AND_ASCENDANTS ○ MEMB
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15 SAP HANA Developer References Th
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