How to create Visio diagrams from Presto Data

Automate the process of entering data into Visio diagrams and keeping your diagrams up to date with the CData ODBC Driver for Presto. The driver surfaces Presto data as an ODBC data source that can be accessed by applications with built-in ODBC support like Microsoft Office. This article shows how to create a simple diagram to start brainstorming about Visio projects linked to Presto data.

Getting Started

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Connect to Presto as an ODBC Data Source

If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

Set the Server and Port connection properties to connect, in addition to any authentication properties that may be required.

To enable TLS/SSL, set UseSSL to true.

Authenticating with LDAP

In order to authenticate with LDAP, set the following connection properties:

• AuthScheme: Set this to LDAP.
• User: The username being authenticated with in LDAP.
• Password: The password associated with the User you are authenticating against LDAP with.

Authenticating with Kerberos

In order to authenticate with KERBEROS, set the following connection properties:

• AuthScheme: Set this to KERBEROS.
• KerberosKDC: The Kerberos Key Distribution Center (KDC) service used to authenticate the user.
• KerberosRealm: The Kerberos Realm used to authenticate the user with.
• KerberosSPN: The Service Principal Name for the Kerberos Domain Controller.
• KerberosKeytabFile: The Keytab file containing your pairs of Kerberos principals and encrypted keys.
• User: The user who is authenticating to Kerberos.
• Password: The password used to authenticate to Kerberos.

Connect Presto Data to Diagrams

Follow the steps below to use the Data Selector Wizard to import data into your diagram.

1. Open Visio and click File -> New. Open the Brainstorming template.
2. On the Data tab, click Custom Import and select Other OLEDB or ODBC data source. 👁 Selecting a data source
   
3. Select the ODBC option and select ODBC DSN.
4. Select the DSN for Presto, select the table you want to import, and finish the wizard. This article uses Customer as an example.

Link Presto Entities to Shapes

Follow the steps below to create a simple diagram that shows how to create shapes from your data, one of the ways to link Presto entities to shapes:

1. Click Brainstorming Shapes and drag a main topic onto the drawing page. Enter Customer as the text of the main topic.
2. Click Topic.
3. Select a row in the External Data window and drag it onto the drawing page.
4. Right-click the Topic shape and click Data -> Edit Data Graphic.
5. Click New Item.
6. In the Data Field menu, select a column. In the Displayed As menu, select how to display them. 👁 A data graphic for a column.
   
7. Drag a few other Presto entities onto the drawing page and add association lines back to the main topic, Customer. New topics have the same configuration: Numeric columns displayed in data bars stand out in contrast to other Customer entities. 👁 Brainstorming with external data. (Salesforce is shown.)
   

You can refresh your diagram from the Data tab, synchronizing your shapes with the external Presto data.