How to use Boto3 to delete a database from AWS Data Catalog?

Problem Statement − Use boto3 library in Python to delete a database, created in your account.

Example − Delete a database ‘Portfolio’ that is created in your account.

Approach/Algorithm to solve this problem

Step 1 − Import boto3 and botocore exceptions to handle exceptions.

Step 2 − Pass the parameter database_name that should be deleted from AWS Glue Catalog.

Step 3 − Create an AWS session using boto3 library. Make sure region_name is mentioned in default profile. If it is not mentioned, then explicitly pass the region_name while creating the session.

Step 4 − Create an AWS client for glue.

Step 5 − Now use delete_database function and pass the database_name as Name parameter.

Step 6 − It will delete the database and return the response metadata.

Step 7 − Handle the generic exception if something went wrong while checking the job.

Note: After completion of this operation, user won’t be able to access to the tables (and all table versions and partitions that belongs to the tables) and the user-defined functions (stored procedures) in the deleted database. AWS Glue deletes these "orphaned" resources asynchronously in a timely manner, at the discretion of the service.

Example

Use the following code to delete a database from AWS Glue Data Catalog −

import boto3
from botocore.exceptions import ClientError

def delete_a_database(database_name):
   session = boto3.session.Session()
   glue_client = session.client('glue')
   try:
      response = glue_client.delete_database(Name=database_name)
   return response
   except ClientError as e:
      raise Exception( "boto3 client error in delete_a_database: " + e.__str__())
   except Exception as e:
      raise Exception( "Unexpected error in delete_a_database: " + e.__str__())

print(delete_a_database("Portfolio"))

Output

{'ResponseMetadata': {'RequestId': '067b667f-0a74d4f30a5b',
'HTTPStatusCode': 200, 'HTTPHeaders': {'date': 'Sat, 27 Feb 2021
14:54:30 GMT', 'content-type': 'application/x-amz-json-1.1', 'contentlength': '2', 'connection': 'keep-alive', 'x-amzn-requestid': '067b667f0a10-4f99-91be-0a74d4f30a5b'}, 'RetryAttempts': 0}}