Add index for issues on relative position, project

and state

1 files changed, 20 insertions, 0 deletions

diff --git a/db/migrate/20190709220143_add_index_to_issues_relative_position.rb b/db/migrate/20190709220143_add_index_to_issues_relative_position.rb
new file mode 100644
index 00000000000..effab33ce4f
--- /dev/null
+++ b/db/migrate/20190709220143_add_index_to_issues_relative_position.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+class AddIndexToIssuesRelativePosition < ActiveRecord::Migration[5.1]
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  INDEX_NAME = 'index_issues_on_project_id_and_state_and_rel_position_and_id'.freeze
+
+  def up
+    add_concurrent_index :issues, [:project_id, :state, :relative_position, :id], order: { id: :desc }, name: INDEX_NAME
+  end
+
+  def down
+    remove_concurrent_index_by_name :issues, INDEX_NAME
+  end
+end