tiny.sql.relationRoot

1pub fn relationRoot(allocator: Allocator, name: []const u8, catalog_schema: catalog_mod.Schema, handle: *const catalog_mod.RelationHandle, stats: ?*const catalog_mod.RelationStats) Error!RelationRoot {2    const owned_name = try allocator.dupe(u8, name);3    errdefer allocator.free(owned_name);45    var table_root = try mapRoot(allocator, &handle.relation.table.rows);6    errdefer table_root.deinit();7    var schema_descriptor = try RelationSchema.init(allocator, handle.definitions, handle.index_definitions);8    errdefer schema_descriptor.deinit();9    const schema_hash = schemaHash(schema_descriptor.columns, schema_descriptor.indexes);10    const stats_root = relationStatsRoot(stats);11    const indexes = try allocator.alloc(IndexRoot, handle.specs.len);12    var index_count: usize = 0;13    errdefer {14        for (indexes[0..index_count]) |*index| index.deinit();15        allocator.free(indexes);16    }1718    for (handle.specs, indexes) |spec, *target| {19        var index_tree = try handle.relation.space.tree(spec.root_page);20        var map = try mapRoot(allocator, &index_tree);21        var map_assigned = false;22        errdefer if (!map_assigned) map.deinit();23        const index_stats = findIndexStats(stats, spec.root_page);24        const index_stats_hash = indexStatsHash(index_stats);25        target.* = .{26            .fields = fieldsHash(spec.fields, spec.columns),27            .map = map,28            .stats = index_stats_hash,29            .hash = indexHash(spec.fields, spec.columns, map.hash, index_stats_hash),30        };31        map_assigned = true;32        index_count += 1;33    }3435    var builder = Builder.init("sql.relation");36    builder.writeU32(format_version);37    builder.bytes(name);38    builder.hash(schema_hash);39    builder.hash(table_root.hash);40    builder.hash(stats_root.hash);41    builder.writeU64(indexes.len);42    for (indexes) |index| builder.hash(index.hash);4344    return .{45        .allocator = allocator,46        .name = owned_name,47        .catalog = .{48            .format = catalog_schema.format,49            .version = catalog_schema.version,50        },51        .schema = schema_hash,52        .schema_descriptor = schema_descriptor,53        .table = table_root,54        .indexes = indexes,55        .stats = stats_root,56        .hash = builder.finish(),57    };58}

1pub const relationRoot = version.relationRoot;