How to delete a hive database with spark-sql?

Question

In my use-case I want to "create or replace" a hive database from spark-sql. I was wondering whether that is even possible? or do I have to manually delete all tables within the database in a for-loop first and then drop the empty database?

Answer 1

Try with below

DROP DATABASE IF EXISTS <database_name> CASCADE;

• CASCADE will drop all the tables in the database.
• Default, the mode is RESTRICT hive will not delete database if there are some tables exists in the db.

Once you drop the database then create a new database using spark-sql.

For more info refer to Create/Drop/Alter/UseDatabase page.

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Next option would be the way you have suggested in the post ( delete all tables then drop the database )

Answer 2

In order to delete the database and all the tables :

spark_session.sql(f'DROP DATABASE IF EXISTS {db_name} CASCADE')

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In order to delete a specific table :

spark_session.sql(f'DROP TABLE IF EXISTS {db_name}.{table_name}')