# File lib/active_record/connection_adapters/sqlite_adapter.rb, line 469
        def table_structure(table_name)
          structure = exec_query("PRAGMA table_info(#{quote_table_name(table_name)})", 'SCHEMA').to_hash
          raise(ActiveRecord::StatementInvalid, "Could not find table '#{table_name}'") if structure.empty?
          structure
        end