exec_stmt_and_free

# File activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb, line 166
          def exec_stmt_and_free(sql, name, binds, cache_stmt: false, async: false)
            sql = transform_query(sql)
            check_if_write_query(sql)

            materialize_transactions
            mark_transaction_written_if_write(sql)

            # make sure we carry over any changes to ActiveRecord.default_timezone that have been
            # made since we established the connection
            @connection.query_options[:database_timezone] = ActiveRecord.default_timezone

            type_casted_binds = type_casted_binds(binds)

            log(sql, name, binds, type_casted_binds, async: async) do
              if cache_stmt
                stmt = @statements[sql] ||= @connection.prepare(sql)
              else
                stmt = @connection.prepare(sql)
              end

              begin
                result = ActiveSupport::Dependencies.interlock.permit_concurrent_loads do
                  stmt.execute(*type_casted_binds)
                end
              rescue Mysql2::Error => e
                if cache_stmt
                  @statements.delete(sql)
                else
                  stmt.close
                end
                raise e
              end

              ret = yield stmt, result
              result.free if result
              stmt.close unless cache_stmt
              ret
            end
          end