Minor fixes. (#1786)

Author: chenyumic

appengine/standard_python37/cloudsql/main_mysql.py

@@ -30,7 +30,7 @@
 def main():
     # When deployed to App Engine, the `GAE_ENV` environment variable will be
     # set to `standard`
-    if os.environ.get('GAE_ENV'):
+    if os.environ.get('GAE_ENV') == 'standard':
         # If deployed, use the local socket interface for accessing Cloud SQL
         host = '/cloudsql/{}'.format(db_connection_name)
     else:

appengine/standard_python37/cloudsql/main_mysql_pooling.py

@@ -25,7 +25,7 @@
 
 # When deployed to App Engine, the `GAE_ENV` environment variable will be
 # set to `standard`
-if os.environ.get('GAE_ENV'):
+if os.environ.get('GAE_ENV') == 'standard':
     # If deployed, use the local socket interface for accessing Cloud SQL
     host = '/cloudsql/{}'.format(db_connection_name)
 else:

appengine/standard_python37/cloudsql/main_postgres.py

@@ -30,7 +30,7 @@
 def main():
     # When deployed to App Engine, the `GAE_ENV` environment variable will be
     # set to `standard`
-    if os.environ.get('GAE_ENV'):
+    if os.environ.get('GAE_ENV') == 'standard':
         # If deployed, use the local socket interface for accessing Cloud SQL
         host = '/cloudsql/{}'.format(db_connection_name)
     else:

appengine/standard_python37/cloudsql/main_postgres_pooling.py

@@ -25,7 +25,7 @@
 
 # When deployed to App Engine, the `GAE_ENV` environment variable will be
 # set to `standard`
-if os.environ.get('GAE_ENV'):
+if os.environ.get('GAE_ENV') == 'standard':
     # If deployed, use the local socket interface for accessing Cloud SQL
     host = '/cloudsql/{}'.format(db_connection_name)
 else: