1 files changed, 30 insertions, 0 deletions
diff --git a/db/migrate/20201102184743_add_index_to_incident_issues_on_project_and_created_at.rb b/db/migrate/20201102184743_add_index_to_incident_issues_on_project_and_created_at.rb
new file mode 100644
index 00000000000..1fd900002c3
--- /dev/null
+++ b/db/migrate/20201102184743_add_index_to_incident_issues_on_project_and_created_at.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class AddIndexToIncidentIssuesOnProjectAndCreatedAt < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  INCIDENT_TYPE = 1
+  OLD_INDEX_NAME = 'index_issues_project_id_issue_type_incident'
+  NEW_INDEX_NAME = 'index_issues_on_project_id_and_created_at_issue_type_incident'
+
+  DOWNTIME = false
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :issues,
+                         [:project_id, :created_at],
+                         where: "issue_type = #{INCIDENT_TYPE}",
+                         name: NEW_INDEX_NAME
+
+    remove_concurrent_index_by_name :issues, OLD_INDEX_NAME
+  end
+
+  def down
+    add_concurrent_index :issues,
+                         :project_id,
+                         where: "issue_type = #{INCIDENT_TYPE}",
+                         name: OLD_INDEX_NAME
+
+    remove_concurrent_index_by_name :issues, NEW_INDEX_NAME
+  end
+end