From 09a00016ad799480ae1fc6c14cff9fee65aa8da7 Mon Sep 17 00:00:00 2001
From: Guo Xiang Tan <tgx_world@hotmail.com>
Date: Thu, 19 Jul 2018 19:03:00 +0800
Subject: [PATCH] PERF: Tune indexes to speed up lookup for bounced email.

---
 .../20180719103905_alter_indexes_on_email_logs.rb    | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 db/migrate/20180719103905_alter_indexes_on_email_logs.rb

diff --git a/db/migrate/20180719103905_alter_indexes_on_email_logs.rb b/db/migrate/20180719103905_alter_indexes_on_email_logs.rb
new file mode 100644
index 00000000000..380021a1852
--- /dev/null
+++ b/db/migrate/20180719103905_alter_indexes_on_email_logs.rb
@@ -0,0 +1,12 @@
+class AlterIndexesOnEmailLogs < ActiveRecord::Migration[5.2]
+  def change
+    remove_index :email_logs,
+      name: "index_email_logs_on_user_id_and_created_at",
+      column: [:user_id, :created_at]
+
+    add_index :email_logs, :user_id
+
+    remove_index :email_logs, [:skipped, :created_at]
+    add_index :email_logs, [:skipped, :bounced, :created_at]
+  end
+end