1390 03 10 OBIEE Repository Basics

8/6/2019 1390 03 10 OBIEE Repository Basics

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Created By : Hitesh Mankar

Reviewed By: Amit Sharma

Contact Point :[email protected]

Oracle BI Creating Repository


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Contents

1.Repository Basics (Oracle BI Architecture Components )

2.Building the Physical Layer of a Repository

3.Building the Business Model and Mapping Layer of a Repository

4.Building the Presentation Layer of a Repository

5.Testing and Validating a Repository


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Oracle BI Architecture Components

Relationships between architecture components

1. Clients

2. Oracle BI Presentation Services

3. Oracle BI Server

4. Oracle BI repository5. Data sources

Clients

Oracle BI

PresentationServices

Oracle BI

ServerData

Source


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1.Clients

Provide access to business intelligence informationOracle BI Answers

Oracle BI Interactive Dashboards

Oracle BI Administration Tool

Data

SourceClients

OBI Answers

OBI Interactive

Dashboards

OBI Administration Tool

Oracle BI

Presentation

Services

Oracle BI

Server


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Oracle BI Answers and Oracle BI Interactive Dashboards are examples of

clients that provide access to business intelligence information via a Web

browser. Oracle BI Administration Tool is a Windows-based application.

Clients

Oracle BI Answers is the only report building interface that OBIEE provides.

It is used for the construction of both Queries (the data) and Reports (the

presentation) .It provides full ad hoc analysis, pivot tables and report creation.

a)Oracle BI Answers


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c)Oracle BI Administration Tool

Administration tool is a windows based client tool or interface to

develop/create and manage Metadata repository and the logical star-schemas.

Metadata Repository (semantic layer) file contains the Business logic,

connections, security configurations etc .

It uses ODBC connectivity to connect to data sources

Dashboards are the standard interface for the majority of users and

simply containers for reports and other content. It allows multiple

reports to be displayed in a tabbed interface.

They are Fully interactive, graphical, secure, personalized information

dashboards. Guided Analytics capabilities provide intelligent links to

aid users in their path to discovery and action.

b)Oracle BI Interactive Dashboards


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2.Oracle BI Presentation Services

Oracle BI Presentation Services makes a request to Oracle BI Server

to retrieve the requested data by the user. It formats the data and sends

it to the client or user.

Provides the processing to visualize the information for client

consumption

Is implemented as an extension to a Web server

Uses a catalog to store saved content

Receives data from Oracle BI Server and provides it to the client that

requested it.

Clients

Oracle BI

Presentation

Services

Oracle BI

Server

Data

Source


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3.Oracle BI Server

It is an analysis server providing a calculation and aggregation engine

that integrates data from multiple relational, unstructured, OLAP, and

other sources. The core server behind Oracle Business Intelligence.

Oracle BI Server receives the data from the data sources and processes

and passes the data to Oracle BI Presentation Services.

Clients

Oracle BI

Presentation

Services

Oracle BI

Server

Data

Source


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4.Oracle BI Repository

Clients

Oracle BI

Presentation

Services

Data

Source

Oracle BI

Server

Repository

Repository is a place where data are stored and maintained. Each

metadata repository can store multiple business models and metadata

used by Oracle BI Server.

Is accessed and configured using the Oracle BI Administration Tool,

which you use to:- Import metadata from databases and other data sources.

Simplify and reorganize the metadata into business models.

Structure the business model for presentation to users who request

information.


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Clients

Oracle BI

Presentation

Services

Oracle BI

Server

Data

Sources

5.Data Sources

It contain the business data that users want to analyze which is

accessed by Oracle BI Server.

Data Sources can be in any format accessed by BI Server such as:

Relational databasesOnline analytical processing (OLAP) databases

Flat files

Spreadsheets

XML for Analysis (XMLA)


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Data Sources

Data sources are the physical sources where the business data is

stored. A connection to the data source is created and then used by

Oracle BI. The data source connection can be defined to use native

drivers or Open Database Connectivity (ODBC).The method, or protocol, used to access a data source depends

on the type of data source.


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1.User views a Dashboard or submits an Answer request2.The Oracle BI Presentation Services makes a request to the Oracle BI

Server to retrieve the requested data

3.The Oracle BI Server, using the .rpd file, optimizes functions to

request the data from the data sources

4.The Oracle BI Server receives the data from the data sources and

processes as necessary

5.The Oracle BI Server passes the data to the Oracle BI Presentation

Services

6.The Oracle BI Presentation Server formats the data and sends it tothe client

Sample Request Processing

Clients

Oracle BI

Presentation

Services

Oracle BI

Server

Data

Source

1 2 3

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Sample Request Processing

This is a simplified example of how an Oracle BI request is processed.

A user accesses a dashboard or submits a request in Answers. The

request is received by Oracle BI Presentation Services, which routes

the request to Oracle BI Server. Oracle BI Server uses the repository todetermine the best way to access the requested data. Then it sends

the SQL or other requests to the sources and combines the results or

provides further processing.

The Oracle BI Server then sends the data back to Oracle BIPresentation Services, which formats the data as appropriate and

sends it to the client for display.


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Oracle BI Administration Tool

The Administration Tool is a Windows application that allows the

Oracle BI Administrator to create and edit repositories. Exposes the

Oracle BI repository as three separate panes, called layers:

Physical layer

Business Model and Mapping layer

Presentation layer


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Oracle BI Repository

Oracle BI Server stores metadata in repositories.

The Oracle BI Administration Tool has a graphical user interface that

allows server administrators to set up these repositories. An Oracle BIServer repository consists of three layers. Each layer appears in a

separate pane in the Oracle BI Administration Tool user interface and

has a tree structure. You can expand each object to see a list of its

components. These layers are not visible to the end user.


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Creating Repository and Building Physical layer

To build or create a new Repository you should use the Oracle BI

Administration Tool.

By importing metadata from databases and other data sources

Physical layer is populate and The data sources can be of the same ordifferent varieties. You can import schemas or portions of schemas

from existing data sources.

During the import process many of the properties of the data sources

are configured automatically based on the information gathered.


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From start menu you can use the Administration Tool

Start Administration Tool


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Write name

for new

Repository

and save it

Click on file

menu and

choose New


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When you save the new repository it opens in Administration Tool

window which displays the empty layers Presentation Layer,Business Model & Mapping layer and Physical layer and dont close

it.

The name of repository will

appear here


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After this you need to Create an ODBC Data Source to import

schema information about a data source into an Oracle BI Serverrepository.

So you need to follow these steps.

Click on start menu

1.Start

3.Control Panel

4.Administrative Tools

5.Data Sources (ODBC) where you can select the data sources


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Open the ODBC Data Source Administrator and click on system

DSN and then Add button to create new data source.


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Choose Your

Data Source

In the Create New Data Source dialog box, select the Oracle

driver Oracle in XE (for oracle Express Edition) and finish it.


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Write Your

data

SourceName

Configure the data source in Oracle ODBC Driver Configuration

dialog box enter a Data Source Name and select the appropriate TNSService Name from the drop down list then clickTest Connection to

open the Oracle ODBC Driver Connect dialog box .


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In the Oracle ODBC Driver Connect dialog box enter the user

name and password and click OK.

Enter User

name andPassword

to connect

with

database


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"Testing Connection" message indicating the connection is

successful. You need to see the message ConnectionSuccessful.


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Now it

shows your

data source

Now it shows your data source which you have chosen Close

Oracle ODBC Driver Configuration dialogue box and ODBCData Source Administrator


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Now you should back on the Administrative tool and click on

File choose Import from database to get your data source.


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Now in select data source dialog box select your data

source name and Enter username and password click ok


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So after selecting the data source you will get the import

dialog box to select the database/databases and expand it.


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Select the tables with Ctrl + Click and click on the import button

When the Import process completes, click Close to close theImport dialog box .

You Should Check that only

the Tables and Keys

checkboxes are selected,

which is the default


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Now the database imported to the physical layer of

repository and check that the tables which imported werecorrect.

Tables which are

selected andimported to physical

layer you can see .


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In the Physical layer of the repository Create Physical Joins right

click the Sales schema folder and select Physical Diagram ---->Object (s) and All Joins.


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In physical diagram rearrange the tables so they are all visible

in the Physical Diagram.


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Click the New Foreign Key button

on the toolbar Click the Producttable and then the FACT_SALES

table. The Physical Foreign Key

dialog box opens. Continue to

create the joins.

Primary key

Foreign key

Check the join expression is:CHANNELS.CHANNEL_ID =

SALES.CHANNEL_ID


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It matters which table you click first the join is creating a one-to-

many (1:N) relationship that joins the key column in the first

table to a foreign key column in the second table. The

Administration Tool automatically determines which columns

should be included in the join.

Click OK to close the Physical Foreign Key dialog box. The join

between Product and FACT_SALES is displayed in the PhysicalDiagram.


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Check that relationship between dimension table and FACT table isalways one-to-many (1:N). And check that more than one fact

tables are not in the physical layer. This diagram in the snow flake

schema.

This is Physical Diagram of Schema Fact_Sales


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Select File to Save or click the Save button on the toolbar to save

the repository and don`t check the global consistency.


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Leave the Administration Tool and the SALES repository

open for the next modeling

So your

new

repository

is created


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To Build the Business Model and Mapping Layer of a

Repository Drag and drop the schema from physical layer toBusiness model and Mapping layer


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Check that all the tables were same as Physical layer and

specially fact table

Fact Table


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Right click on the table sales select Business Model Diagram

-----> Whole Diagram


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In this layer you can customize the database and tables you

can add more tables or delete those tables which are notrequired for modeling. Here in the SALES schema Region

table is merged into STORE table.Region

Table

Merged

into StoreTable


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So this is the look of Logical Table Diagram for the Business

modeling and Mapping layer

So after joining

both tables

showntogether in

sources in the

logical table

Dialog Box


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Building the Presentation Layer of Repository

Drag the SALES business model from the Business Model

and Mapping layer to the Presentation layer to create the

SALES catalog in the Presentation layer.


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Expand the SALES catalogin the Presentation layer.

Notice that the tables and

columns in the

Presentation layer exactly

match the tables andcolumns in the Business

Model and Mapping layer.

Save the repository and

Do not check global

consistency


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Testing and Validating a Repository

After Building the business model and Presentation layer youneed to test the repository begin by checking the repository for

errors using the Check Global Consistency option.

Run a Consistency

Check

Click on the File Menu go

to Check Global

Consistency and click onit


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The Consistency Check Manager displays three types of messages

1.Error messages indicate

errors that need to be fixed to

make the repository

consistent.

2.Warning messagesindicate conditions that may

or may not be errors,

depending upon the intent of

the Oracle BI Server

administrator.

3.Best Practices messages

provide information about

conditions but do not indicate

an inconsistency.


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The Consistency Check Manager

For each message theConsistency Check

Manager identifies the

message type, the object

type , the object and

provides a detaileddescription of the

message. There are

options to display only

selected message types,

display results usingqualified names check all

objects in the repository

and copy the results to

another file.


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Before Global Consistency Check the red

mark appear on the schema in Business

Model and mapping Layer

After Global Consistency Check the red mark

disappear on the schema in Business Model and

mapping Layer means consistency check Completed


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To test your RPD its necessary to write your RPD file name in

the NQSConfig.ini file which located in\OBIEE_SERVER\server\Config and save it

Here you need to

write / change

your RPD name in

NQSConfig.ini file

as shown

This is the

NQSConfig file in

which you need

to write your rpd

name


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Use Oracle BI Answers to Execute Queries

Start >

Programs >

Oracle Business Intelligence >

Presentation Services.

You need to start or restart all your services Oracle BI Server, OracleBI Presentation Server and Oracle BI Java Host services and also

your data source properly.


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Log in to Oracle Business Intelligence asAdministrator


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After login to OBI Click theAnswers link in the Dashboard

Click on SALES in the subject areas it shows your RPD


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Click on the column name in selection pane to select the column

Selected Columns appear here


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This is the Result for

those Columns which

are selected

Click on the Results tab to get result for selected columns

Column Name which

are selected


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THANK YOU

To learn more about OBIEE

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1390 03 10 OBIEE Repository Basics