public function walkPath($path, $missingRowColumns = false, $maxSubtableRows = 0)
    {
        $pathLength = count($path);

        $table = $this;
        $next = false;
        for ($i = 0; $i < $pathLength; ++$i) {
            $segment = $path[$i];

            $next = $table->getRowFromLabel($segment);
            if ($next === false) {
                // if there is no table to advance to, and we're not adding missing rows, return false
                if ($missingRowColumns === false) {
                    return array(false, $i);
                } else {
                    // if we're adding missing rows, add a new row

                    $row = new DataTableSummaryRow();
                    $row->setColumns(array('label' => $segment) + $missingRowColumns);

                    $next = $table->addRow($row);

                    if ($next !== $row) {
                        // if the row wasn't added, the table is full

                        // Summary row, has no metadata
                        $next->deleteMetadata();
                        return array($next, $i);
                    }
                }
            }

            $table = $next->getSubtable();
            if ($table === false) {
                // if the row has no table (and thus no child rows), and we're not adding
                // missing rows, return false
                if ($missingRowColumns === false) {
                    return array(false, $i);
                } elseif ($i != $pathLength - 1) {
                    // create subtable if missing, but only if not on the last segment

                    $table = new DataTable();
                    $table->setMaximumAllowedRows($maxSubtableRows);
                    $table->metadata[self::COLUMN_AGGREGATION_OPS_METADATA_NAME]
                        = $this->getMetadata(self::COLUMN_AGGREGATION_OPS_METADATA_NAME);
                    $next->setSubtable($table);
                    // Summary row, has no metadata
                    $next->deleteMetadata();
                }
            }
        }

        return array($next, $i);
    }