ETL Excel Services in Oracle Data Integrator

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Excel Services JDBC Driver

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This article shows how to transfer Excel Services data into a data warehouse using Oracle Data Integrator.

Leverage existing skills by using the JDBC standard to read and write to Excel Services: Through drop-in integration into ETL tools like Oracle Data Integrator (ODI), the CData JDBC Driver for Excel Services connects real-time Excel Services data to your data warehouse, business intelligence, and Big Data technologies.

JDBC connectivity enables you to work with Excel Services just as you would any other database in ODI. As with an RDBMS, you can use the driver to connect directly to the Excel Services APIs in real time instead of working with flat files.

This article walks through a JDBC-based ETL -- Excel Services to Oracle. After reverse engineering a data model of Excel Services entities, you will create a mapping and select a data loading strategy -- since the driver supports SQL-92, this last step can easily be accomplished by selecting the built-in SQL to SQL Loading Knowledge Module.

Install the Driver

To install the driver, copy the driver JAR and .lic file, located in the installation folder, into the ODI userlib directory:

On Unix: ~/.odi/oracledi/userlib On Windows: %APPDATA%\Roaming\odi\oracledi\userlib

Restart ODI to complete the installation.

Reverse Engineer a Model

Reverse engineering the model retrieves metadata about the driver's relational view of Excel Services data. After reverse engineering, you can query real-time Excel Services data and create mappings based on Excel Services tables.

  1. In ODI, connect to your repository and click New -> Model and Topology Objects.
  2. On the Model screen of the resulting dialog, enter the following information:
    • Name: Enter ExcelServices.
    • Technology: Select Generic SQL (for ODI Version 12.2+, select Microsoft SQL Server).
    • Logical Schema: Enter ExcelServices.
    • Context: Select Global.
  3. On the Data Server screen of the resulting dialog, enter the following information:
    • Name: Enter ExcelServices.
    • Driver List: Select Oracle JDBC Driver.
    • Driver: Enter cdata.jdbc.excelservices.ExcelServicesDriver
    • URL: Enter the JDBC URL containing the connection string.

      The URL, User, and Password properties, under the Authentication section, must be set to valid credentials for SharePoint Online, SharePoint 2010, or SharePoint 2013. Additionally, the Library property must be set to a valid SharePoint Document Library and the File property must be set to a valid .xlsx file in the indicated Library.

      Built-in Connection String Designer

      For assistance in constructing the JDBC URL, use the connection string designer built into the Excel Services JDBC Driver. Either double-click the JAR file or execute the jar file from the command-line.

      java -jar cdata.jdbc.excelservices.jar

      Fill in the connection properties and copy the connection string to the clipboard.

      Below is a typical connection string:

      jdbc:excelservices:URL=https://myorg.sharepoint.com;User=admin@myorg.onmicrosoft.com;Password=password;File=Book1.xlsx;
  4. On the Physical Schema screen, enter the following information:
    • Schema (Schema): Enter ExcelServices.
    • Schema (Work Schema): Enter ExcelServices.
  5. In the opened model click Reverse Engineer to retrieve the metadata for Excel Services tables.

Edit and Save Excel Services Data

After reverse engineering you can now work with Excel Services data in ODI. To edit and save Excel Services data, expand the Models accordion in the Designer navigator, right-click a table, and click Data. Click Refresh to pick up any changes to the data. Click Save Changes when you are finished making changes.

Create an ETL Project

Follow the steps below to create an ETL from Excel Services. You will load Account entities into the sample data warehouse included in the ODI Getting Started VM.

  1. Open SQL Developer and connect to your Oracle database. Right-click the node for your database in the Connections pane and click new SQL Worksheet.

    Alternatively you can use SQLPlus. From a command prompt enter the following:

    sqlplus / as sysdba
  2. Enter the following query to create a new target table in the sample data warehouse, which is in the ODI_DEMO schema. The following query defines a few columns that match the Account table in Excel Services: CREATE TABLE ODI_DEMO.TRG_ACCOUNT (ANNUALREVENUE NUMBER(20,0),Name VARCHAR2(255));
  3. In ODI expand the Models accordion in the Designer navigator and double-click the Sales Administration node in the ODI_DEMO folder. The model is opened in the Model Editor.
  4. Click Reverse Engineer. The TRG_ACCOUNT table is added to the model.
  5. Right-click the Mappings node in your project and click New Mapping. Enter a name for the mapping and clear the Create Empty Dataset option. The Mapping Editor is displayed.
  6. Drag the TRG_ACCOUNT table from the Sales Administration model onto the mapping.
  7. Drag the Account table from the Excel Services model onto the mapping.
  8. Click the source connector point and drag to the target connector point. The Attribute Matching dialog is displayed. For this example, use the default options. The target expressions are then displayed in the properties for the target columns.
  9. Open the Physical tab of the Mapping Editor and click ACCOUNT_AP in TARGET_GROUP.
  10. In the ACCOUNT_AP properties, select LKM SQL to SQL (Built-In) on the Loading Knowledge Module tab.

You can then run the mapping to load Excel Services data into Oracle.