Merge pull request aws-samples#86 from 12Manoz/master

Python Example: Pagination of data returned by partiql execute statement.

Author: NoSQLKnowHow

DynamoDB-SDK-Examples/python/WorkingWithPartiQL/paginated-select-statement.py

@@ -0,0 +1,33 @@
+import boto3
+
+from botocore.exceptions import ClientError
+
+# execute statment works with low level client.
+dynamodb = boto3.client('dynamodb', region_name='us-east-1')
+params = {
+    'statement': 'SELECT * FROM "cerberus-test-3"',
+    'next_token': None
+}
+
+# Shows we cannot use inbuilt pagination for execute statement.
+print(dynamodb.can_paginate('execute_statement'))
+
+while True:
+    try:
+        if params['next_token'] is None:
+            response = dynamodb.execute_statement(
+                Statement=params['statement'])
+
+        elif params['next_token']:
+            response = dynamodb.execute_statement(
+                Statement=params['statement'], NextToken=params['next_token'])
+
+        # for paginated results response includes nexttoken which can be used for pagination
+        if 'NextToken' in response:
+            params['next_token'] = response['NextToken']
+            print("Next token is updated")
+        else:
+            print("paginated statement executed succesfully")
+            break
+    except ClientError as error:
+        print(error)