Create PostgreSQL Connections

Contents:

You can create connections to one or more PostgreSQL databases from Trifacta® Wrangler Pro. For more information on PostgreSQL, see https://www.postgresql.org/.

If you are connecting Trifacta Wrangler Pro to any relational source of data, such as Redshift or Oracle, you must add the Trifacta Service to your whitelist for those resources.

For more information, see Getting Started with Trifacta Wrangler Pro.

Configure

To create this connection:

In the Import Data page, click the Plus sign. Then, select the Relational tab. Click the PostgreSQL card.
You can also create connections through the Connections page. See Connections Page.

Modify the following properties as needed:

Property	Description
Host	Enter your fully qualified hostname. Example: my.postgres.server
Port	Set this value to `5432`.
Connect String Options	Insert any additional connection parameters, if needed. See below.
Enable SSL	Select the checkbox to enable SSL connections to the database. NOTE: Additional configuration may be required in the database server. For more information, please consult the documentation that was provided with the distribution.
Database	Enter the name of the database on the server to which to connect.
User Name	Username to use to connect to the database.
Password	Password associated with the above username.
Test Connection	After you have defined the connection credentials type, credentials, and connection string, you can validate those credentials.
Default Column Data Type Inference	Set to `disabled` to prevent the platform from applying its own type inference to each column on import. The default value is `enabled`.
Connection Name	Display name of the connection
Connection Description	Description of the connection, which appears in the application.

Reference

Connection URL

The properties that you provide are inserted into the following URL, which connects Trifacta Wrangler Pro to the connection:

jdbc:postgresql://<host>:<port>/<database><connect-string-options>

Connect string options

The connect string options are optional. If you are passing additional properties and values to complete the connection, the connect string options must be structured in the following manner:

?<prop1>=<val1>&<prop2>=<val2>...

where:

<prop> : the name of the property
<val> : the value for the property

delimiters:

? : any set of connect string options must begin with a question mark.
& : all additional property names must be prefixed with an ampersand (&).
= : property names and values must be separated with an equal sign (=).

Driver Information

This connection uses the following driver:

Driver name: org.postgresql.Driver
Driver version: org.postgresql:postgresql:42.1.1
Driver documentation: https://jdbc.postgresql.org/documentation/head/index.html

Troubleshooting

Error message	Description
Class 08 Connection Exception	Connection failure: the web client or Trifacta node is unable to establish a connection.
Class 28 Invalid Authorization Specification	Typically, this error occurs when an invalid password has been submitted. Tip: Use the Test Connection button to validate your credentials.

For more information on error messages for this connection type, see https://www.postgresql.org/docs/9.3/errcodes-appendix.html.

NOTE: Please note the version number in the URL above.

Use

For more information, see Database Browser.

For more information on interacting with data, see Using Databases.

Data Conversion

For more information on how values are converted during input and output with this database, see Postgres Data Type Conversions.

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