public synchronized void addMeta(PageIndex index, Session session) {
int type = index instanceof PageDataIndex ? META_TYPE_DATA_INDEX : META_TYPE_BTREE_INDEX;
IndexColumn[] columns = index.getIndexColumns();
StatementBuilder buff = new StatementBuilder();
for (IndexColumn col : columns) {
buff.appendExceptFirst(",");
int id = col.column.getColumnId();
buff.append(id);
int sortType = col.sortType;
if (sortType != 0) {
buff.append('/');