Method walk_root

src/jrd/validation.cpp:3221–3289

Validation::RTN Validation::walk_root(jrd_rel* relation, bool getInfo)
{
/**************************************
 *
 *	w a l k _ r o o t
 *
 **************************************
 *
 * Functional description
 *	Walk index root page for a relation. If getInfo is true
 *  get index metadata for condition indices, else walk every index.
 *
 **************************************/

	// If the relation has an index root, walk it
	RelationPages* relPages = relation->getBasePages();

	if (!relPages->rel_index_root)
		return corrupt(VAL_INDEX_ROOT_MISSING, relation);

	index_root_page* page = 0;
	WIN window(DB_PAGE_SPACE, -1);
	fetch_page(!getInfo, relPages->rel_index_root, pag_root, &window, &page);

	for (USHORT i = 0; i < page->irt_count; i++)
	{
		if (page->irt_rpt[i].getRoot() == 0)
			continue;

		MetaName index;

		release_page(&window);
		MET_lookup_index(vdr_tdbb, index, relation->rel_name, i + 1);
		fetch_page(false, relPages->rel_index_root, pag_root, &window, &page);

		if (vdr_idx_incl)
		{
			if (!vdr_idx_incl->matches(index.c_str(), index.length()))
				continue;
		}

		if (vdr_idx_excl)
		{
			if (vdr_idx_excl->matches(index.c_str(), index.length()))
				continue;
		}

		if (getInfo)
		{
			if (page->irt_rpt[i].irt_flags & irt_condition)
			{
				// No need to evaluate index expression
				AutoSetRestoreFlag<UCHAR> flag(&page->irt_rpt[i].irt_flags, irt_expression, false);

				IdxInfo info;
				if (BTR_description(vdr_tdbb, relation, page, &info.m_desc, i))
					vdr_cond_idx.add(info);
			}