SharonIV0x86 commented on code in PR #2849:
URL: https://github.com/apache/kvrocks/pull/2849#discussion_r2079721466
##########
src/types/redis_tdigest.cc:
##########
@@ -225,6 +225,10 @@ rocksdb::Status TDigest::Quantile(engine::Context& ctx,
const Slice& digest_name
if (auto status = dumpCentroids(ctx, ns_key, metadata, ¢roids);
!status.ok()) {
return status;
}
+ if (centroids.empty()) {
Review Comment:
So just to be clear, after we load the metadata
[here](https://github.com/apache/kvrocks/blob/6719b607141fd2b07f5d5a967971fc1d6de0f87a/src/types/redis_tdigest.cc#L191C19-L191C27)
i add a check to do something like this.
```cpp
if(metadata.merged_nodes == 0 && and metadata.unmerged_nodes == 0){
//tdigest does not contain any data. so set the flag
}
```
Correct me if im wrong.
> And it would be better to add cpp unit test for this behavior.
I'll try working on this as well.
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