Add specific indexes for CI

This adds specific indexes to speed up the query mentioned in
https://gitlab.com/gitlab-org/gitlab-ce/issues/50763 and to avoid
statement timeouts.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/50763.

1 files changed, 19 insertions, 0 deletions

diff --git a/db/migrate/20181119132520_add_indexes_to_ci_builds_and_pipelines.rb b/db/migrate/20181119132520_add_indexes_to_ci_builds_and_pipelines.rb
new file mode 100644
index 00000000000..2134131b28f
--- /dev/null
+++ b/db/migrate/20181119132520_add_indexes_to_ci_builds_and_pipelines.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class AddIndexesToCiBuildsAndPipelines < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :ci_pipelines, [:project_id, :ref, :id], order: { id: :desc }
+    add_concurrent_index :ci_builds, [:commit_id, :artifacts_expire_at, :id], where: "type = 'Ci::Build' AND (retried = false OR retried IS NULL) AND name IN ('sast', 'dependency_scanning', 'sast:container', 'container_scanning', 'dast')"
+  end
+
+  def down
+    remove_concurrent_index :ci_pipelines, [:project_id, :ref, :id], order: { id: :desc }
+    remove_concurrent_index :ci_builds, [:commit_id, :artifacts_expire_at, :id], where: "type = 'Ci::Build' AND (retried = false OR retried IS NULL) AND name IN ('sast', 'dependency_scanning', 'sast:container', 'container_scanning', 'dast')"
+  end
+end