Goal Try to use as much the possibilities of the DBMS as possible. On the other hand, do not install extensions that are not needed in order not to overcomplicate the database.
Type General (Overview of some aspect of the database.)
License MIT License
Fixing Suggestion If you need an extension, then install it.
Data Source system catalog only
SQL Query
SELECT name, comment
FROM pg_catalog.pg_available_extensions
WHERE installed_version IS NULL
ORDER BY name;

SQL statements that help generate fixes for the identified problem.

SQL Query to Generate FixDescription
SELECT format('CREATE EXTENSION %1$I;', name) AS statements
FROM pg_catalog.pg_available_extensions
WHERE installed_version IS NULL
ORDER BY name;
Install the extension in the current default object creation schema.
Collections

This query belongs to the following collections:

NameDescription
Find problems by overviewQueries that results point to different aspects of database that might have problems. A human reviewer has to decide based on the results as to whether there are problems or not .
Categories

This query is classified under the following categories:

NameDescription
Comfortability of data managementQueries of this category provide information about the means that have been used to make the use or management of database more comfortable and thus, more efficient.
ExtensionsQueries of this category provide information about extensions in the database.

Further reading and related materials:

Reference
https://www.postgresql.org/docs/current/contrib.html