kangkaisen commented on a change in pull request #3869:
URL: https://github.com/apache/incubator-doris/pull/3869#discussion_r440569648
##########
File path: be/src/olap/aggregate_func.h
##########
@@ -449,15 +449,22 @@ struct
AggregateFuncTraits<OLAP_FIELD_AGGREGATION_REPLACE_IF_NOT_NULL, OLAP_FIEL
template <>
struct AggregateFuncTraits<OLAP_FIELD_AGGREGATION_HLL_UNION,
OLAP_FIELD_TYPE_HLL> {
static void init(RowCursorCell* dst, const char* src, bool src_null,
MemPool* mem_pool, ObjectPool* agg_pool) {
- DCHECK_EQ(src_null, false);
dst->set_not_null();
auto* src_slice = reinterpret_cast<const Slice*>(src);
auto* dst_slice = reinterpret_cast<Slice*>(dst->mutable_cell_ptr());
+ // Because of history bug, we ingest some NULL HLL data in storage,
+ // which slice data is nullptr or invalid address,
+ // we must handle this case to avoid process crash.
+ HyperLogLog* hll = nullptr;
Review comment:
I don't agree simply handle null here. If we do this way, we must handle
null forever, which is terrible.
At least，We should find a way to convert the invalid null HLL to empty and
Remove null handle in future version.
----------------------------------------------------------------
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
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org
For additional commands, e-mail: commits-h...@doris.apache.org
