From ac004297fa708d9fc0bb61be2b01832e06406c8a Mon Sep 17 00:00:00 2001
From: Guo Xiang Tan <tgx_world@hotmail.com>
Date: Wed, 30 Jan 2019 09:33:53 +0800
Subject: [PATCH] PERF: Add index on `user_id` to `single_sign_on_records`.

---
 app/models/single_sign_on_record.rb                          | 1 +
 ...0013015_add_index_on_user_id_to_single_sign_on_records.rb | 5 +++++
 2 files changed, 6 insertions(+)
 create mode 100644 db/migrate/20190130013015_add_index_on_user_id_to_single_sign_on_records.rb

diff --git a/app/models/single_sign_on_record.rb b/app/models/single_sign_on_record.rb
index 1ceeacf5d6d..417a5f35902 100644
--- a/app/models/single_sign_on_record.rb
+++ b/app/models/single_sign_on_record.rb
@@ -24,4 +24,5 @@ end
 # Indexes
 #
 #  index_single_sign_on_records_on_external_id  (external_id) UNIQUE
+#  index_single_sign_on_records_on_user_id      (user_id)
 #
diff --git a/db/migrate/20190130013015_add_index_on_user_id_to_single_sign_on_records.rb b/db/migrate/20190130013015_add_index_on_user_id_to_single_sign_on_records.rb
new file mode 100644
index 00000000000..2eb26d5ca57
--- /dev/null
+++ b/db/migrate/20190130013015_add_index_on_user_id_to_single_sign_on_records.rb
@@ -0,0 +1,5 @@
+class AddIndexOnUserIdToSingleSignOnRecords < ActiveRecord::Migration[5.2]
+  def change
+    add_index :single_sign_on_records, :user_id
+  end
+end