1 files changed, 19 insertions, 0 deletions
diff --git a/db/post_migrate/20190723105753_add_index_on_identities_lower_extern_uid_and_provider.rb b/db/post_migrate/20190723105753_add_index_on_identities_lower_extern_uid_and_provider.rb
new file mode 100644
index 00000000000..36ecca4821f
--- /dev/null
+++ b/db/post_migrate/20190723105753_add_index_on_identities_lower_extern_uid_and_provider.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class AddIndexOnIdentitiesLowerExternUidAndProvider < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  INDEX_NAME = "index_on_identities_lower_extern_uid_and_provider"
+
+  def up
+    add_concurrent_index(:identities, 'lower(extern_uid), provider', name: INDEX_NAME)
+  end
+
+  def down
+    remove_concurrent_index_by_name(:identities, INDEX_NAME)
+  end
+end