kangpinghuang commented on a change in pull request #1633: add zone map
page(#1390)
URL: https://github.com/apache/incubator-doris/pull/1633#discussion_r316637044
##########
File path: be/src/olap/rowset/segment_v2/column_reader.cpp
##########
@@ -156,18 +160,69 @@ Status ColumnReader::read_page(const PagePointer& pp,
PageHandle* handle) {
return Status::OK();
}
+void ColumnReader::get_row_ranges_by_zone_map(CondColumn* cond_column,
RowRanges* row_ranges) {
+ std::vector<uint32_t> page_indexes;
+ _get_filtered_pages(cond_column, &page_indexes);
+ _calculate_row_ranges(page_indexes, row_ranges);
+}
+
+void ColumnReader::_get_filtered_pages(CondColumn* cond_column,
std::vector<uint32_t>* page_indexes) {
+ FieldType type = _type_info->type();
+ const std::vector<ZoneMapPB>& zone_maps =
_column_zone_map->get_column_zone_map();
+ int32_t page_size = _column_zone_map->num_pages();
+ std::unique_ptr<WrapperField>
min_value(WrapperField::create_by_type(type));
+ std::unique_ptr<WrapperField>
max_value(WrapperField::create_by_type(type));
+ for (int32_t i = 0; i < page_size; ++i) {
+ min_value->from_string(zone_maps[i].min());
+ max_value->from_string(zone_maps[i].max());
+ // for compatible original Cond eval logic
+ // TODO(hkp): optimize OlapCond
+ if (zone_maps[i].null_flag() && !zone_maps[i].non_null_flag()) {
Review comment:
ok
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
With regards,
Apache Git Services
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@doris.apache.org
For additional commands, e-mail: dev-h...@doris.apache.org
