From 337ccfa3a6e54f1b08b2947f17597eadfacbe2fa Mon Sep 17 00:00:00 2001
From: Guo Xiang Tan <tgx_world@hotmail.com>
Date: Tue, 21 Nov 2017 14:05:09 +0800
Subject: [PATCH] MONKEYPATCH: Allow us to disable the use of advisory locks
 during migration.

---
 .../connection_adapters/postgresql_adapter.rb             | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 lib/active_record/connection_adapters/postgresql_adapter.rb

diff --git a/lib/active_record/connection_adapters/postgresql_adapter.rb b/lib/active_record/connection_adapters/postgresql_adapter.rb
new file mode 100644
index 00000000000..30cea9f81ea
--- /dev/null
+++ b/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -0,0 +1,8 @@
+# Awaiting decision on https://github.com/rails/rails/issues/31190
+if ENV['DISABLE_MIGRATION_ADVISORY_LOCK']
+  class ActiveRecord::ConnectionAdapters::PostgreSQLAdapter
+    def supports_advisory_locks?
+      false
+    end
+  end
+end