template0 is a built-in template database in PostgreSQL that serves as a pristine, read-only template for creating new databases. Here are its key purposes:
-
Base for New Databases: When you create a new database, you can use
template0as a template to ensure that the new database starts with a clean state, without any modifications or additional objects. -
Recovery: If a database becomes corrupted or has unwanted changes, you can use
template0to create a fresh copy of the database. -
Isolation: It allows you to create databases that are isolated from any customizations or extensions that may exist in other template databases, such as
template1.
In summary, template0 is useful for ensuring that new databases are created from a clean slate, providing a reliable starting point.
