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Release 8.2



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

Pre-requisites

If the Trifacta databases are hosted on a PostgreSQL server, do not create a connection to this database.

  • If you haven't done so already, you must create and deploy an encryption key file for the Trifacta node to be shared by all relational connections. For more information, see Create Encryption Key File

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.

For additional details on creating a PostgreSQL connection, see Enable Relational Connections.

This connection can also be created using the API. 

Modify the following properties as needed:

PropertyDescription
Host
Enter your fully qualified hostname. Example:

 

my.postgres.server
PortSet 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.


DatabaseEnter the name of the database on the server to which to connect.
User NameUsername to use to connect to the database.
PasswordPassword associated with the above username.
Test ConnectionAfter 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 NameDisplay name of the connection
Connection DescriptionDescription 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 Enterprise 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:

Troubleshooting

Error messageDescription
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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