1 files changed, 40 insertions, 0 deletions
diff --git a/db/migrate/20210120180956_extend_index_on_ci_builds_metadata.rb b/db/migrate/20210120180956_extend_index_on_ci_builds_metadata.rb
new file mode 100644
index 00000000000..421a2fac1ae
--- /dev/null
+++ b/db/migrate/20210120180956_extend_index_on_ci_builds_metadata.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+class ExtendIndexOnCiBuildsMetadata < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  OLD_INDEX = :index_ci_builds_metadata_on_build_id_and_interruptible
+  NEW_INDEX = :index_ci_builds_metadata_on_build_id_and_id_and_interruptible
+
+  TABLE = :ci_builds_metadata
+
+  def up
+    create_covering_index(TABLE, NEW_INDEX)
+
+    remove_concurrent_index_by_name TABLE, OLD_INDEX
+  end
+
+  def down
+    add_concurrent_index TABLE, :build_id, where: 'interruptible = true', name: OLD_INDEX
+
+    remove_concurrent_index_by_name TABLE, NEW_INDEX
+  end
+
+  private
+
+  def create_covering_index(table, name)
+    return if index_exists_by_name?(table, name)
+
+    disable_statement_timeout do
+      execute <<~SQL
+        CREATE INDEX CONCURRENTLY #{name}
+        ON #{table} (build_id) INCLUDE (id)
+        WHERE interruptible = true
+      SQL
+    end
+  end
+end