diff options
| -rw-r--r-- | db/migrate/20180213131630_add_partial_index_to_projects_for_index_only_scans.rb | 21 | ||||
| -rw-r--r-- | db/schema.rb | 3 |
2 files changed, 23 insertions, 1 deletions
diff --git a/db/migrate/20180213131630_add_partial_index_to_projects_for_index_only_scans.rb b/db/migrate/20180213131630_add_partial_index_to_projects_for_index_only_scans.rb new file mode 100644 index 00000000000..c8ebabbe627 --- /dev/null +++ b/db/migrate/20180213131630_add_partial_index_to_projects_for_index_only_scans.rb @@ -0,0 +1,21 @@ +class AddPartialIndexToProjectsForIndexOnlyScans < ActiveRecord::Migration + include Gitlab::Database::MigrationHelpers + + DOWNTIME = false + INDEX_NAME = 'index_projects_on_id_partial_for_visibility' + + disable_ddl_transaction! + + # Adds a partial index to leverage index-only scans when looking up project ids + def up + unless index_exists?(:projects, :id, name: INDEX_NAME) + add_concurrent_index :projects, :id, name: INDEX_NAME, unique: true, where: 'visibility_level IN (10,20)' + end + end + + def down + if index_exists?(:projects, :id, name: INDEX_NAME) + remove_concurrent_index :projects, :id, name: INDEX_NAME, unique: true, where: 'visibility_level IN (10,20)' + end + end +end diff --git a/db/schema.rb b/db/schema.rb index 6b43fc8403c..409d1ac7644 100644 --- a/db/schema.rb +++ b/db/schema.rb @@ -11,7 +11,7 @@ # # It's strongly recommended that you check this file into your version control system. -ActiveRecord::Schema.define(version: 20180208183958) do +ActiveRecord::Schema.define(version: 20180213131630) do # These are extensions that must be enabled in order to support this database enable_extension "plpgsql" @@ -1468,6 +1468,7 @@ ActiveRecord::Schema.define(version: 20180208183958) do add_index "projects", ["created_at"], name: "index_projects_on_created_at", using: :btree add_index "projects", ["creator_id"], name: "index_projects_on_creator_id", using: :btree add_index "projects", ["description"], name: "index_projects_on_description_trigram", using: :gin, opclasses: {"description"=>"gin_trgm_ops"} + add_index "projects", ["id"], name: "index_projects_on_id_partial_for_visibility", unique: true, where: "(visibility_level = ANY (ARRAY[10, 20]))", using: :btree add_index "projects", ["last_activity_at"], name: "index_projects_on_last_activity_at", using: :btree add_index "projects", ["last_repository_check_failed"], name: "index_projects_on_last_repository_check_failed", using: :btree add_index "projects", ["last_repository_updated_at"], name: "index_projects_on_last_repository_updated_at", using: :btree |