1 files changed, 21 insertions, 0 deletions
diff --git a/db/migrate/20210216223335_remove_index_on_issues_where_service_desk_reply_to_is_not_null.rb b/db/migrate/20210216223335_remove_index_on_issues_where_service_desk_reply_to_is_not_null.rb
new file mode 100644
index 00000000000..5224b6f7031
--- /dev/null
+++ b/db/migrate/20210216223335_remove_index_on_issues_where_service_desk_reply_to_is_not_null.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+class RemoveIndexOnIssuesWhereServiceDeskReplyToIsNotNull < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  INDEX_TABLE = :issues
+  INDEX_NAME = 'idx_on_issues_where_service_desk_reply_to_is_not_null'
+
+  def up
+    Gitlab::BackgroundMigration.steal('PopulateIssueEmailParticipants')
+    remove_concurrent_index_by_name INDEX_TABLE, INDEX_NAME
+  end
+
+  def down
+    add_concurrent_index(INDEX_TABLE, [:id], name: INDEX_NAME, where: 'service_desk_reply_to IS NOT NULL')
+  end
+end