Fix addressing sparsed (#9382)

Author: ivanmorozov333

ydb/core/tx/columnshard/engines/changes/compaction/sparsed/logic.cpp

@@ -134,7 +134,7 @@ bool TSparsedMerger::TPlainChunkCursor::AddIndexTo(const ui32 index, TWriter& wr
 
 bool TSparsedMerger::TSparsedChunkCursor::AddIndexTo(const ui32 index, TWriter& writer) {
     AFL_VERIFY(ChunkStartGlobalPosition <= index);
-    AFL_VERIFY(index == NextGlobalPosition);
+    AFL_VERIFY(index == NextGlobalPosition)("index", index)("next", NextGlobalPosition);
     writer.AddRealData(Chunk->GetColValue(), NextLocalPosition);
     return true;
 }
@@ -163,7 +163,9 @@ void TSparsedMerger::TCursor::InitArrays(const ui32 position) {
         PlainCursor = make_shared<TPlainChunkCursor>(CurrentOwnedArray->GetArray(), &*CurrentOwnedArray);
         SparsedCursor = nullptr;
     }
+    AFL_VERIFY(CurrentOwnedArray->GetAddress().GetGlobalStartPosition() <= position);
     FinishGlobalPosition = CurrentOwnedArray->GetAddress().GetGlobalStartPosition() + CurrentOwnedArray->GetArray()->GetRecordsCount();
+    AFL_VERIFY(position < FinishGlobalPosition);
 }
 
 }   // namespace NKikimr::NOlap::NCompaction

ydb/core/tx/columnshard/engines/changes/compaction/sparsed/logic.h

@@ -58,11 +58,15 @@ class TSparsedMerger: public IColumnMerger {
 
         void InitArrays(const ui32 position) {
             AFL_VERIFY(!ChunkAddress || ChunkFinishPosition <= position);
-            ChunkAddress = CurrentChunkedArray->GetChunk(ChunkAddress, position);
+            AFL_VERIFY(CurrentOwnedArray->GetAddress().GetGlobalStartPosition() <= position)("pos", position)(
+                "global", CurrentOwnedArray->GetAddress().GetGlobalStartPosition());
+            ChunkAddress = CurrentChunkedArray->GetChunk(ChunkAddress, position - CurrentOwnedArray->GetAddress().GetGlobalStartPosition());
             AFL_VERIFY(ChunkAddress);
             ChunkStartPosition = CurrentOwnedArray->GetAddress().GetGlobalStartPosition() + ChunkAddress->GetAddress().GetGlobalStartPosition();
             ChunkFinishPosition =
                 CurrentOwnedArray->GetAddress().GetGlobalStartPosition() + ChunkAddress->GetAddress().GetGlobalFinishPosition();
+            AFL_VERIFY(position < ChunkFinishPosition)("finish", ChunkFinishPosition)("pos", position);
+            AFL_VERIFY(ChunkStartPosition <= position)("start", ChunkStartPosition)("pos", position);
         }
 
     public:
@@ -76,14 +80,15 @@ class TSparsedMerger: public IColumnMerger {
         }
         bool AddIndexTo(const ui32 index, TWriter& writer);
         std::optional<ui32> MoveToSignificant(const ui32 currentGlobalPosition, const TColumnMergeContext& context) {
-            AFL_VERIFY(ChunkStartPosition <= currentGlobalPosition);
+            AFL_VERIFY(ChunkStartPosition <= currentGlobalPosition)("start", ChunkStartPosition)("pos", currentGlobalPosition)(
+                "global_start", CurrentOwnedArray->GetAddress().GetGlobalStartPosition());
             ui32 currentIndex = currentGlobalPosition;
             while (true) {
                 if (CurrentOwnedArray->GetAddress().GetGlobalFinishPosition() <= currentIndex) {
                     return {};
                 }
                 if (ChunkFinishPosition <= currentIndex) {
-                    InitArrays(currentGlobalPosition);
+                    InitArrays(currentIndex);
                     continue;
                 }
                 for (; currentIndex < ChunkFinishPosition; ++currentIndex) {
@@ -190,6 +195,7 @@ class TSparsedMerger: public IColumnMerger {
                 if (FinishGlobalPosition == Array->GetRecordsCount()) {
                     return FinishGlobalPosition;
                 } else {
+                    currentPosition = FinishGlobalPosition;
                     InitArrays(FinishGlobalPosition);
                 }
             }

ydb/library/formats/arrow/accessor/abstract/accessor.cpp

@@ -45,7 +45,7 @@ std::shared_ptr<arrow::ChunkedArray> IChunkedArray::Slice(const ui32 offset, con
 
 NKikimr::NArrow::NAccessor::IChunkedArray::TFullDataAddress IChunkedArray::GetChunk(
     const std::optional<TAddressChain>& chunkCurrent, const ui64 position) const {
-    AFL_VERIFY(position < GetRecordsCount());
+    AFL_VERIFY(position < GetRecordsCount())("pos", position)("records", GetRecordsCount())("current", chunkCurrent ? chunkCurrent->DebugString() : Default<TString>());
     std::optional<TCommonChunkAddress> address;
 
     if (IsDataOwner()) {

ydb/library/formats/arrow/accessor/abstract/accessor.h

@@ -104,8 +104,13 @@ class IChunkedArray {
         }
 
         TString DebugString() const {
-            return TStringBuilder() << "start=" << GlobalStartPosition << ";finish=" << GlobalFinishPosition
-                                    << ";addresses_count=" << Addresses.size() << ";";
+            TStringBuilder sb;
+            sb << "start=" << GlobalStartPosition << ";finish=" << GlobalFinishPosition
+                << ";addresses_count=" << Addresses.size() << ";";
+            for (auto&& i : Addresses) {
+                sb << "addresses=" << i.DebugString() << ";";
+            }
+            return sb;
         }
     };