SAP HANA Developer Guide - Get a Free Blog

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1 Overview This guide presents a developer’s view of SAP HANA ® . It explains how to use the SAP HANA development tools to create comprehensive analytical models and to build applications with SAP HANA's programmatic interfaces and integrated development environment, including to develop native code that runs inside SAP HANA. The guide is organized as follows: ● SAP HANA [page 9] describes the capabilities of SAP HANA. ● SAP HANA as a Development Platform [page 16] describes the main developer scenarios, the development process and the development environment. ● Setting Up Your Application [page 34] describes how to get started developing SAP HANA applications. Most of the remaining chapters explain how to develop various SAP HANA development objects. Audience Note: Application development with SAP HANA Extended Application Services (SAP HANA XS) is currently only available as an SAP-led project solution, for pre-approved customers and partners. This applies to server-side JavaScript programming, support for ODATA and XMLA, Web server features and the Web application development environment. For more information, see SAP Note 1779803. This guide is aimed at two developer roles: ● Modeler: This person, often a business/data analyst or database expert, is concerned with the definition of the model and schemas that will be used in SAP HANA, the specification and definition of tables, views, primary keys, indexes, partitions and other aspects of the layout and inter-relationship of the data in SAP HANA. The data modeler is also concerned with designing and defining authorization and access control, through the specification of privileges, roles and users. The modeler generally uses the Administration Console and Modeler perspectives and tools of the SAP HANA studio. ● Application Programmer: The programmer is concerned with building SAP HANA applications, which could 8 take many forms but are designed based on the model-view-controller architecture. Programmers develop the code for: ○ View, which could run inside a browser or on a mobile device ○ Controller, which typically runs in the context of an application server ○ Model, which interacts closely with the data model, performs efficient queries, and may be developed to run within the SAP HANA data engine, using embedded procedures or libraries The programmer generally uses the SAP HANA Development perspective and tools of the SAP HANA studio. P U B L I C © 2012 SAP AG. All rights reserved. SAP HANA Developer Guide Overview
2 SAP HANA SAP HANA is an in-memory data platform that is deployable as an appliance or in the cloud. At its core, it is an innovative in-memory relational database management system that makes full use of the capabilities of current hardware to increase application performance, to reduce cost of ownership, and to enable new scenarios and applications that were not possible before. With SAP HANA, you have the opportunity to build applications that integrate the business control logic and the database layer with unprecedented performance. As a developer, one of the key questions is how you can minimize data movements. The more you can do directly on the data in memory next to the CPUs, the better the application will perform. 2.1 The SAP HANA In-Memory Database SAP HANA was designed to run on modern, distributed computers built out of multi-core CPUs (multiple CPUs on one chip) with fast communication between processor cores, and containing terabytes of main memory. With SAP HANA, all data is available in main memory, which completely avoids the performance penalty of disk I/O. Either disk or solid-state drives are still required for permanent persistency in the event of a power failure or some other catastrophe. This does not slow down performance, however, because the required backup operations to disk can take place asynchronously as a background task. 2.1.1 Columnar Data Storage A database table is conceptually a two-dimensional data structure organized in rows and columns. Computer memory, in contrast, is organized as a linear structure. A table can be represented in row-order or column-order. A row-oriented organization stores a table as a sequence of records. Conversely, in column storage the entries of a column are stored in contiguous memory locations. SAP HANA supports both, but is particularly optimized for column-order storage. Columnar data storage allows highly efficient compression. Especially if a column is sorted, there will normally be repeated adjacent values. SAP HANA employs highly efficient compression methods, such as run-length encoding, cluster coding and dictionary coding. With dictionary encoding, columns are stored as sequences of bitcoded integers. That means that a check for equality can be executed on the integers (for example during scans or join operations). This is much faster than comparing, for example, string values. SAP HANA Developer Guide SAP HANA P U B L I C © 2012 SAP AG. All rights reserved. 9
Page 1 and 2: SAP HANA Appliance Software SPS 05
Page 3 and 4: 4.3.1 SAP HANA Repository Packages
Page 5 and 6: 6.5.12 Searching Tables, Models and
Page 7: 12.2 Authentication Overview. .....
Page 11 and 12: With a scanning speed of several gi
Page 13 and 14: SAP HANA greatly extends the tradit
Page 15 and 16: 2.4 Refactoring SAP HANA Based Appl
Page 17 and 18: In either case, as a developer you
Page 19 and 20: For this scenario, you may need to
Page 21 and 22: Object Description File Extension M
Page 23 and 24: Committing the file saves it in the
Page 25 and 26: ● Security: Contains the roles an
Page 27 and 28: The view essentially is a list of r
Page 29 and 30: Action Description ● Creates a ne
Page 31 and 32: ● Debug Session: The debug sessio
Page 33 and 34: ○ MODELING ○ CONTENT_ADMIN 3.5.
Page 35 and 36: 4.1 Setting up Delivery Units A del
Page 37 and 38: Related Links ○ In the text boxes
Page 39 and 40: 4.2.2 Creating a Repository Workspa
Page 41 and 42: 3. Open the Project Explorer view.
Page 43 and 44: 1. Create a package Packages are ne
Page 45 and 46: ● Non-Structural Package contains
Page 47 and 48: In the New Package dialog, enter in
Page 49 and 50: Maintaining Translation Details [pa
Page 51 and 52: Note: Exposed package content can i
Page 53 and 54: Application-Access File Keyword Opt
Page 55 and 56: Note: You can disable authenticatio
Page 57 and 58: | |---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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7.2 Debugging SQLScript The SAP HAN
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Invoker's right: If you want the sy
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The main aim of OData is to define
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The OData specification requires an
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Entity Sets This construct allows y
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● Sample JSON Output: Single Prop
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$count This request allows you to r
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● Sample ATOM and JSON Output: SA
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● Sample JSON Output: $orderby Th
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● Sample JSON Output: $top This o
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.xsodata//$inlinecount=allpages ●
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8.1.4 OData Security Considerations
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object :=['entity'] ( repoobject |
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SAP HANA SQL Type OData EDM Type Se
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An empty service metadata document
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All information about the table, fo
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OData Key Specification The OData s
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As a consequence of the transient n
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The second association is similar t
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"1" dependent "Orders"("CustomerID"
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} parameters via entity; During act
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XMLA Service-Definition Keywords Cu
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Function Description DrillDownLevel
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Function Description PrevMember Ret
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Analytic and calculation views can
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4. Place the valid XMLA service def
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The functions provided by the JavaS
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Cross-site scripting (XSS) ● Prob
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Make sure you have addressed the is
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Server-side JavaScript files have t
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Use the $.import function, as follo
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Note: A SQL connection configuratio
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8. Find the trace matching your app
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The session ID is the value of the
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10 Building UIs with SAPUI5 This se
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2. Specify the name, for example My
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// use alternative bootstrap for t
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11 Enabling Search With a SAP HANA
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Synchronization [page 240] Full tex
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) content SHORTTEXT(100) Changes to
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● Preprocessing ● Preprocessed
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Name of Option Description In most
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Column ID Key Description Data Type
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a) Delete the existing full text in
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Parameter Data Type FUZZY_SEAR CH_I
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Parameter Data Type Default (TEXT)
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The CONTAINS predicate is optional
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Limitations The SNIPPET function ha
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Fuzzy search can be used in various
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Original Letter Standardized Letter
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Option similarCalculationMode The 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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