Merge branch 'bw-add-index-for-relative-position' into 'master'

Add index for issues on relative position, project, and state for manual sorting

See merge request gitlab-org/gitlab-ce!30542

2 files changed, 21 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
diff --git a/db/schema.rb b/db/schema.rb
index 79cd1a3a797..681353121db 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -1682,6 +1682,7 @@ ActiveRecord::Schema.define(version: 2019_07_15_114644) do
     t.index ["project_id", "created_at", "id", "state"], name: "index_issues_on_project_id_and_created_at_and_id_and_state", using: :btree
     t.index ["project_id", "due_date", "id", "state"], name: "idx_issues_on_project_id_and_due_date_and_id_and_state_partial", where: "(due_date IS NOT NULL)", using: :btree
     t.index ["project_id", "iid"], name: "index_issues_on_project_id_and_iid", unique: true, using: :btree
+    t.index ["project_id", "state", "relative_position", "id"], name: "index_issues_on_project_id_and_state_and_rel_position_and_id", order: { id: :desc }, using: :btree
     t.index ["project_id", "updated_at", "id", "state"], name: "index_issues_on_project_id_and_updated_at_and_id_and_state", using: :btree
     t.index ["relative_position"], name: "index_issues_on_relative_position", using: :btree
     t.index ["state"], name: "index_issues_on_state", using: :btree