Hate it or like it, we have to admit that Microsoft product has a lot of bug.

As-of now 2023–04–07, we found bug on the Azure Database for PostgreSQL that we cannot set the value of azure.extension to have UUID-OSSP.

It has every value except the UUID-OSSP

Then I saw some command

Extensions - Azure Database for PostgreSQL - Flexible Server

Learn about the available PostgreSQL extensions in Azure Database for PostgreSQL - Flexible Server

Microsoft Learnsunilagarwal

az postgres flexible-server parameter set
--resource-group <your resource group>
--server-name <your server name>
--subscription <your subscription id>
--name azure.extensions
--value <extension name>,<extension name>

Now how do we know the value

By hovering here, I can see the value that can be set. Then we arrive at:

az postgres flexible-server parameter set
--resource-group my-resource-group
--server-name test-postgres-uuid-001
--subscription 3fdf4b5f-xxxx-xxxx-xxxx-xxxxxxx4815
--name azure.extensions
--value uuid-ossp

Then you go to test it in the PostgreSQL database client. Mine is Dbeaver.

SHOW azure.extensions;
-- Should see uuid-ossp

CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
-- Should be able to run without error

SELECT uuid_generate_v4();
-- Then test it, should get back the uuid

Hope this help !