[spanner] fix: set timeout for polling on operations [(#3488)](GoogleCloudPlatform/python-docs-samples#3488)

* [spanner] fix: set timeout for polling on operations

fixes #3471

* bump the deadline to 1200 for backup and restore

* bumped the deadline to 120

Author: Takashi Matsuo

samples/samples/backup_sample.py

@@ -42,7 +42,7 @@ def create_backup(instance_id, database_id, backup_id):
     operation = backup.create()
 
     # Wait for backup operation to complete.
-    operation.result()
+    operation.result(1200)
 
     # Verify that the backup is ready.
     backup.reload()
@@ -68,7 +68,7 @@ def restore_database(instance_id, new_database_id, backup_id):
     operation = new_database.restore(backup)
 
     # Wait for restore operation to complete.
-    operation.result()
+    operation.result(1200)
 
     # Newly created database has restore information.
     new_database.reload()

samples/samples/snippets.py

@@ -52,7 +52,7 @@ def create_database(instance_id, database_id):
     operation = database.create()
 
     print('Waiting for operation to complete...')
-    operation.result()
+    operation.result(120)
 
     print('Created database {} on instance {}'.format(
         database_id, instance_id))
@@ -213,7 +213,7 @@ def add_index(instance_id, database_id):
         'CREATE INDEX AlbumsByAlbumTitle ON Albums(AlbumTitle)'])
 
     print('Waiting for operation to complete...')
-    operation.result()
+    operation.result(120)
 
     print('Added the AlbumsByAlbumTitle index.')
 # [END spanner_create_index]
@@ -306,7 +306,7 @@ def add_storing_index(instance_id, database_id):
         'STORING (MarketingBudget)'])
 
     print('Waiting for operation to complete...')
-    operation.result()
+    operation.result(120)
 
     print('Added the AlbumsByAlbumTitle2 index.')
 # [END spanner_create_storing_index]
@@ -355,7 +355,7 @@ def add_column(instance_id, database_id):
         'ALTER TABLE Albums ADD COLUMN MarketingBudget INT64'])
 
     print('Waiting for operation to complete...')
-    operation.result()
+    operation.result(120)
 
     print('Added the MarketingBudget column.')
 # [END spanner_add_column]
@@ -509,7 +509,7 @@ def create_table_with_timestamp(instance_id, database_id):
     ])
 
     print('Waiting for operation to complete...')
-    operation.result()
+    operation.result(120)
 
     print('Created Performances table on database {} on instance {}'.format(
         database_id, instance_id))
@@ -554,7 +554,7 @@ def add_timestamp_column(instance_id, database_id):
         'OPTIONS(allow_commit_timestamp=true)'])
 
     print('Waiting for operation to complete...')
-    operation.result()
+    operation.result(120)
 
     print('Altered table "Albums" on database {} on instance {}.'.format(
         database_id, instance_id))
@@ -1122,7 +1122,7 @@ def create_table_with_datatypes(instance_id, database_id):
     ])
 
     print('Waiting for operation to complete...')
-    operation.result()
+    operation.result(120)
 
     print('Created Venues table on database {} on instance {}'.format(
         database_id, instance_id))