1 files changed, 16 insertions, 0 deletions
diff --git a/db/post_migrate/20220510004501_remove_tmp_empty_traversal_ids_child_namespace_index.rb b/db/post_migrate/20220510004501_remove_tmp_empty_traversal_ids_child_namespace_index.rb
new file mode 100644
index 00000000000..804b20a38e9
--- /dev/null
+++ b/db/post_migrate/20220510004501_remove_tmp_empty_traversal_ids_child_namespace_index.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+class RemoveTmpEmptyTraversalIdsChildNamespaceIndex < Gitlab::Database::Migration[2.0]
+  disable_ddl_transaction!
+
+  CHILD_INDEX_NAME = 'tmp_index_namespaces_empty_traversal_ids_with_child_namespaces'
+
+  def up
+    remove_concurrent_index :namespaces, :id, name: CHILD_INDEX_NAME
+  end
+
+  def down
+    where_sql = "parent_id IS NOT NULL AND traversal_ids = '{}'"
+    add_concurrent_index :namespaces, :id, where: where_sql, name: CHILD_INDEX_NAME
+  end
+end