kangkaisen commented on a change in pull request #2319: Add Bitmap index reader
URL: https://github.com/apache/incubator-doris/pull/2319#discussion_r352555625
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File path: be/src/olap/rowset/segment_v2/bitmap_index_reader.cpp
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@@ -17,10 +17,65 @@
#include "olap/rowset/segment_v2/bitmap_index_reader.h"
+#include "olap/types.h"
+#include "runtime/mem_tracker.h"
+#include "runtime/mem_pool.h"
+
namespace doris {
namespace segment_v2 {
+Status BitmapIndexReader::load() {
+ const IndexedColumnMetaPB dict_meta = _bitmap_index_meta.dict_column();
+ const IndexedColumnMetaPB bitmap_meta = _bitmap_index_meta.bitmap_column();
+ _has_null = _bitmap_index_meta.has_null();
+
+ _dict_column_reader.reset(new IndexedColumnReader(_file, dict_meta));
+ _bitmap_column_reader.reset(new IndexedColumnReader(_file, bitmap_meta));
+ RETURN_IF_ERROR(_dict_column_reader->load());
+ RETURN_IF_ERROR(_bitmap_column_reader->load());
+ return Status::OK();
+}
+
+Status BitmapIndexReader::new_iterator(BitmapIndexIterator** iterator) {
+ *iterator = new BitmapIndexIterator(this);
+ return Status::OK();
+}
+
+Status BitmapIndexIterator::seek_dictionary(const void* value, bool*
exact_match) {
+ RETURN_IF_ERROR(_dict_column_iter.seek_at_or_after(value, exact_match));
+ _current_rowid = _dict_column_iter.get_current_ordinal();
+ return Status::OK();
+}
+
+Status BitmapIndexIterator::read_bitmap(rowid_t ordinal, Roaring* result) {
+ DCHECK(0 <= ordinal && ordinal < _reader->bitmap_nums());
+
+ Slice value;
+ uint8_t nullmap;
+ MemTracker mem_tracker;
+ MemPool mem_pool(&mem_tracker);
+ size_t num_to_read = 1;
+ ColumnBlock block(get_type_info(OLAP_FIELD_TYPE_VARCHAR), (uint8_t*)
&value, &nullmap, num_to_read, &mem_pool);
Review comment:
done
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