1 files changed, 24 insertions, 0 deletions
diff --git a/db/migrate/20210310000627_add_idx_vulnerability_occurrences_dedup.rb b/db/migrate/20210310000627_add_idx_vulnerability_occurrences_dedup.rb
new file mode 100644
index 00000000000..5ffcc005225
--- /dev/null
+++ b/db/migrate/20210310000627_add_idx_vulnerability_occurrences_dedup.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+# See https://docs.gitlab.com/ee/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddIdxVulnerabilityOccurrencesDedup < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  TABLE = :vulnerability_occurrences
+  INDEX_NAME = 'index_vulnerability_occurrences_deduplication'
+  COLUMNS = %i[project_id report_type project_fingerprint]
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index TABLE, COLUMNS, name: INDEX_NAME
+  end
+
+  def down
+    remove_concurrent_index TABLE, COLUMNS, name: INDEX_NAME
+  end
+end