imay commented on a change in pull request #1646: Support page compression in
BetaRowset
URL: https://github.com/apache/incubator-doris/pull/1646#discussion_r314312451
##########
File path: be/src/olap/rowset/segment_v2/column_writer.cpp
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@@ -226,10 +228,14 @@ Status ColumnWriter::_write_data_page(Page* page) {
Status ColumnWriter::_write_physical_page(std::vector<Slice>* origin_data,
PagePointer* pp) {
std::vector<Slice>* output_data = origin_data;
std::vector<Slice> compressed_data;
- // TODO(zc): support compress
- // if (_need_compress) {
- // output_data = &compressed_data;
- // }
+
+ // Put compressor out of if block, because we should use compressor's
+ // content until this function finished.
+ PageCompressor compressor(_compress_codec);
+ if (_compress_codec != nullptr) {
+ RETURN_IF_ERROR(compressor.compress(*origin_data, &compressed_data));
+ output_data = &compressed_data;
+ }
// checksum
uint8_t checksum_buf[sizeof(uint32_t)];
Review comment:
this is a stack array, can not leak
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