How to use Boto3 get the details of all the databases from AWS Glue Data Catalog?

Problem Statement − Use boto3 library in Python to retrieve the definition of all the databases.

Example − Retrieve the definition of all the databases.

Approach/Algorithm to solve this problem

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

Step 2 − There is no parameter.

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 get_databases function.

Step 6 − It returns the definition of all databases present in user’s account.

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

Example

Use the following code to retrieve the definition of all the databases −

import boto3
from botocore.exceptions import ClientError

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

Output

{'DatabaseList': [
{'Name': 'QA-test', 'CreateTime': datetime.datetime(2020, 11, 18, 14,
24, 46, tzinfo=tzlocal())},
{'Name': 'custdb', 'CreateTime': datetime.datetime(2020, 8, 31, 20, 30,
9, tzinfo=tzlocal())},
{'Name': 'default', 'Description': 'Default Hive database',
'LocationUri': 'hdfs://ip-
************.ec2.internal:****/user/hive/warehouse', 'CreateTime':
datetime.datetime(2018, 5, 25, 16, 4, 54,
tzinfo=tzlocal())},'NextToken':
'eyJsYXN0RXZhbHVhdGVkS2V5Ijp7IkhBU0hfS0VZIjp7InMiOiJuLjc4MjI1ODQ4NTg0MSJ
9LCJSQU5HRV9LRVkiOnsicyI6InN************Mjk3NywibmFub3MiOjIyNTA*********
**NvbnRleHQiOmZhbHNlfQ==',
'ResponseMetadata': {'RequestId': 'fa0a2069-***********-a0617',
'HTTPStatusCode': 200, 'HTTPHeaders': {'date': 'Sun, 28 Feb 2021
12:49:37 GMT', 'content-type': 'application/x-amz-json-1.1', 'contentlength': '25749', 'connection': 'keep-alive', 'x-amzn-requestid':
'fa0a2069-************a0617'}, 'RetryAttempts': 0}}