How does dropping a database work internally in MySQL?

Dropping a database in MySQL is a process that involves removing an entire database along with all its tables and data. When you execute the `DROP DATABASE` command, MySQL internally performs several actions to ensure that the database and its associated data are completely removed from the system.

Here’s how the process works internally:

• **Locking**: MySQL acquires locks on the database to prevent other operations from interfering with the drop process.
• **Removing Metadata**: MySQL updates the metadata in the data dictionary to reflect that the database no longer exists.
• **Deleting Files**: The underlying files on the disk that store the database and its data are deleted. This includes all tables, indexes, and associated data files.
• **Freeing Resources**: Any system resources allocated to the database, such as memory and cache, are freed up for reuse.

It’s important to remember that dropping a database is irreversible. Once executed, all data stored within the database is permanently lost.