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PostgreSQL Connections

You can create connections to a PostgreSQL database from the Designer Cloud Powered by Trifacta platform. For more information on PostgreSQL, see https://www.postgresql.org/.

Tip

You can create connections to databases of this type that are managed by your enterprise or are hosted in cloud infrastructure. The required configuration is the same. The cloud-based version is labeled on Amazon RDS. In the Create Connection dialog, you can search for that term.

Supported Versions: 9.3.10

Supported Environments:

Operation

Designer Cloud Powered by Trifacta platform

Amazon

Microsoft Azure

Read

Supported

Supported

Supported

Write

Supported

Supported

Supported

Prerequisites

Warning

If the Alteryx 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 Relational Access.

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.

Advanced options: Default Column Data Type Inference

Set todisabledto prevent the platformfrom applying its own type inference to each column on import. The default value isenabled.

Advanced options: Enable SSH Tunneling

This feature is not available.

Connection Name

Display name of the connection

Connection Description

Description of the connection, which appears in the application.

Connection URL

The properties that you provide are inserted into the following URL, which connects the Designer Cloud Powered by Trifacta platform 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:

Create via API

This connection can also be created using the API.

  • Type: jdbc

  • Vendor: postgres

For more information, see https://api.trifacta.com/ee/9.7/index.html#operation/createConnection

Troubleshooting

Error message

Description

Class 08 Connection Exception

Connection failure: Trifacta Application 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.

SQL Syntax

The following syntax requirements apply to this connection.

Object delimiter: double-quote

Example syntax:

Double quotes required around database, table names, and column names.

SELECT "column1","column2" FROM "databaseName"."tableName";

For more information on SQL in general, see Supported SQL Syntax.

Data Conversion

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

In this section: