allow empty app_profile_ids

Author: daniel-sanche

owlbot.py

@@ -113,3 +113,18 @@ def get_staging_dirs(
 INSTALL_LIBRARY_FROM_SOURCE = False""")
 
 s.shell.run(["nox", "-s", "blacken"], hide_output=False)
+
+# ----------------------------------------------------------------------------
+# Customize execute_query rpc to support empty app_profile_id headers
+# ----------------------------------------------------------------------------
+
+s.replace(
+    "google/cloud/bigtable_v2/services/bigtable/client.py",
+    "if request.app_profile_id:",
+    "if request.app_profile_id is not None:  # temporary fix: support empty headers for btql routing"
+)
+s.replace(
+    "google/cloud/bigtable_v2/services/bigtable/async_client.py",
+    "if request.app_profile_id:",
+    "if request.app_profile_id is not None:  # temporary fix: support empty headers for btql routing"
+)