1 files changed, 28 insertions, 0 deletions
diff --git a/db/migrate/20201204090855_add_compound_index_to_vulnerability_remediations_table.rb b/db/migrate/20201204090855_add_compound_index_to_vulnerability_remediations_table.rb
new file mode 100644
index 00000000000..0b4b6e552aa
--- /dev/null
+++ b/db/migrate/20201204090855_add_compound_index_to_vulnerability_remediations_table.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+class AddCompoundIndexToVulnerabilityRemediationsTable < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  NEW_INDEX_NAME = 'index_vulnerability_remediations_on_project_id_and_checksum'
+  OLD_INDEX_NAME = 'index_vulnerability_remediations_on_checksum'
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :vulnerability_remediations, [:project_id, :checksum], unique: true, name: NEW_INDEX_NAME
+    add_concurrent_foreign_key :vulnerability_remediations, :projects, column: :project_id
+
+    remove_concurrent_index_by_name :vulnerability_remediations, OLD_INDEX_NAME
+  end
+
+  def down
+    add_concurrent_index :vulnerability_remediations, :checksum, unique: true, name: OLD_INDEX_NAME
+
+    remove_concurrent_index_by_name :vulnerability_remediations, NEW_INDEX_NAME
+
+    with_lock_retries do
+      remove_foreign_key_if_exists :vulnerability_remediations, column: :project_id
+    end
+  end
+end