text: -- Add down migration script here
  DROP INDEX pages_content_search;
  DROP TRIGGER trigger_set_pages_content_search ON pages;
  DROP FUNCTION trigger_set_pages_content_search;
  DROP FUNCTION extract_searchable_text_from_document_schema;
  ALTER TABLE pages DROP COLUMN content_search_original_text;
  ALTER TABLE pages DROP COLUMN content_search;
  ALTER TABLE pages DROP COLUMN content_search_language;
  ALTER TABLE courses DROP COLUMN content_search_language;
  