KIKIMR-14517 online index miss lead null records

ref:00665ba3f0b5facd76f6631d27337b5a23eb55dd

10 files changed, 296 insertions, 189 deletions

diff --git a/ydb/core/kqp/ut/common/kqp_ut_common.cpp b/ydb/core/kqp/ut/common/kqp_ut_common.cpp
index e40ce41a16..09883f657a 100644
--- a/ydb/core/kqp/ut/common/kqp_ut_common.cpp
+++ b/ydb/core/kqp/ut/common/kqp_ut_common.cpp
@@ -717,6 +717,14 @@ TCollectedStreamResult CollectStreamResult(NYdb::NTable::TScanQueryPartIterator&
     return CollectStreamResultImpl(it);
 }
 
+TString ReadTableToYson(NYdb::NTable::TSession session, const TString& table) {
+    TReadTableSettings settings;
+    settings.Ordered(true);
+    auto it = session.ReadTable(table, settings).GetValueSync();
+    UNIT_ASSERT(it.IsSuccess());
+    return StreamResultToYson(it);
+}
+
 TString ReadTablePartToYson(NYdb::NTable::TSession session, const TString& table) {
     TReadTableSettings settings;
     settings.Ordered(true);
diff --git a/ydb/core/kqp/ut/common/kqp_ut_common.h b/ydb/core/kqp/ut/common/kqp_ut_common.h
index 7ddae870c7..70406b2190 100644
--- a/ydb/core/kqp/ut/common/kqp_ut_common.h
+++ b/ydb/core/kqp/ut/common/kqp_ut_common.h
@@ -226,6 +226,7 @@ TString StreamResultToYson(NYdb::NTable::TTablePartIterator& it);
 ui32 CountPlanNodesByKv(const NJson::TJsonValue& plan, const TString& key, const TString& value);
 NJson::TJsonValue FindPlanNodeByKv(const NJson::TJsonValue& plan, const TString& key, const TString& value);
 
+TString ReadTableToYson(NYdb::NTable::TSession session, const TString& table);
 TString ReadTablePartToYson(NYdb::NTable::TSession session, const TString& table);
 
 inline void AssertSuccessResult(const NYdb::TStatus& result) {
diff --git a/ydb/core/kqp/ut/kqp_indexes_multishard_ut.cpp b/ydb/core/kqp/ut/kqp_indexes_multishard_ut.cpp
index 1a5afadb9a..5055581476 100644
--- a/ydb/core/kqp/ut/kqp_indexes_multishard_ut.cpp
+++ b/ydb/core/kqp/ut/kqp_indexes_multishard_ut.cpp
@@ -16,14 +16,6 @@ using namespace NYdb::NScripting;
 
 namespace {
 
-TString ReadTableToYson(NYdb::NTable::TSession session, const TString& table) {
-    TReadTableSettings settings;
-    settings.Ordered(true);
-    auto it = session.ReadTable(table, settings).GetValueSync();
-    UNIT_ASSERT(it.IsSuccess());
-    return StreamResultToYson(it);
-}
-
 NYdb::NTable::TDataQueryResult ExecuteDataQuery(TSession& session, const TString& query) {
     const auto txSettings = TTxControl::BeginTx(TTxSettings::SerializableRW()).CommitTx();
     return session.ExecuteDataQuery(query, txSettings).ExtractValueSync();
diff --git a/ydb/core/kqp/ut/kqp_indexes_ut.cpp b/ydb/core/kqp/ut/kqp_indexes_ut.cpp
index cbe7d4877e..39be9e8e0d 100644
--- a/ydb/core/kqp/ut/kqp_indexes_ut.cpp
+++ b/ydb/core/kqp/ut/kqp_indexes_ut.cpp
@@ -1552,7 +1552,6 @@ Y_UNIT_TEST_SUITE(KqpIndexes) {
             const auto& yson = ReadTablePartToYson(session, "/Root/TestTable/IndexName/indexImplTable");
             const TString expected =
                 R"([[["Secondary 1"];["Primary 1"]];)"
-                R"([["Secondary 2"];#];)"
                 R"([["Secondary 3"];["Primary 3"]];)"
                 R"([["Secondary 4"];#]])";
             UNIT_ASSERT_VALUES_EQUAL(yson, expected);
diff --git a/ydb/core/tx/datashard/datashard_ut_range_ops.cpp b/ydb/core/tx/datashard/datashard_ut_range_ops.cpp
index 61f0bc9406..681749709b 100644
--- a/ydb/core/tx/datashard/datashard_ut_range_ops.cpp
+++ b/ydb/core/tx/datashard/datashard_ut_range_ops.cpp
@@ -5,16 +5,18 @@
 namespace NKikimr {
 
 Y_UNIT_TEST_SUITE(RangeOps) {
-    TString MakeValue(ui64 value) {
-        TRawTypeValue raw(&value, sizeof(value), NScheme::NTypeIds::Uint64);
-        TCell cell(&raw);
-        TVector<TCell> vec = {cell};
+    TString MakePoint(TVector<std::optional<ui64>> values) {
+        TVector<TCell> vec;
+        for (const auto& val: values) {
+            TCell cell = val ? TCell::Make<ui64>(val.value()) : TCell();
+            vec.push_back(cell);
+        }
         TArrayRef<TCell> cells(vec);
         return TSerializedCellVec::Serialize(cells);
     }
-    TString MakeLeftInf() {
-        TCell cell;
-        TVector<TCell> vec = {cell};
+
+    TString MakeLeftInf(ui32 cellsCount = 1) {
+        TVector<TCell> vec = TVector(cellsCount, TCell());
         TArrayRef<TCell> cells(vec);
         return TSerializedCellVec::Serialize(cells);
     }
@@ -55,25 +57,100 @@ Y_UNIT_TEST_SUITE(RangeOps) {
         typeRegistry->CalculateMetadataEtag();
 
         const TVector<NKikimr::NScheme::TTypeId> valueType = {NScheme::NTypeIds::Uint64};
+        const TVector<NKikimr::NScheme::TTypeId> pairType = {NScheme::NTypeIds::Uint64, NScheme::NTypeIds::Uint64};
 
         const auto emptyRange = MakeRange(
-            MakeValue(20), true,
-            MakeValue(10), true
+            MakePoint({20}), true,
+            MakePoint({10}), true
             );
 
         {
             //=================
+            //(-inf;        +inf)
+            //----[bbbbbbbb]------- // range with lead null
+
+            auto first = MakeRange(
+                MakeLeftInf(pairType.size()), true,
+                MakeRightInf(), false
+                );
+
+            Cerr << "first " << DebugPrintRange(pairType, first.ToTableRange(), *typeRegistry);
+            Y_ASSERT(!first.ToTableRange().IsEmptyRange(valueType));
+
+            auto second = MakeRange(
+                MakePoint({std::nullopt, 1}), true,
+                MakePoint({20, 20}), true
+                );
+
+            Cerr << " second " << DebugPrintRange(pairType, second.ToTableRange(), *typeRegistry);
+
+            auto range = Intersect(pairType, first.ToTableRange(), second.ToTableRange());
+            Cerr << " result " << DebugPrintRange(pairType, range, *typeRegistry);
+
+            auto correct = MakeRange(
+                MakePoint({std::nullopt, 1}), true,
+                MakePoint({20, 20}), true
+                );
+
+            Cerr << " correct " << DebugPrintRange(pairType, correct.ToTableRange(), *typeRegistry);
+
+            CheckRange(pairType, correct.ToTableRange(), range);
+            Cerr << Endl;
+        }
+
+        {
+            // test for KIKIMR-14517
+            //=================
+            //------(-inf;    +inf) // -inf is wrongly set up as {null} instead of {null, null}
+            //----[bbbbbbbb]------- // range with lead null
+
+            // here is a mistake: MakeLeftInf(valueType.size()) is set up as {null}
+            // but -inf shoud be set up as {null, null}
+            // however  MakePoint({std::nullopt, 1}) is {null, 1}
+            // as a resul {null} = {null, +inf} > {null, 1} > {null, null}
+
+            auto first = MakeRange(
+                MakeLeftInf(valueType.size()), true,
+                MakeRightInf(), false
+                );
+
+            Cerr << "first " << DebugPrintRange(pairType, first.ToTableRange(), *typeRegistry);
+            Y_ASSERT(!first.ToTableRange().IsEmptyRange(valueType));
+
+            auto second = MakeRange(
+                MakePoint({std::nullopt, 1}), true,
+                MakePoint({20, 20}), true
+                );
+
+            Cerr << " second " << DebugPrintRange(pairType, second.ToTableRange(), *typeRegistry);
+
+            auto range = Intersect(pairType, first.ToTableRange(), second.ToTableRange());
+            Cerr << " result " << DebugPrintRange(pairType, range, *typeRegistry);
+
+            auto correct = MakeRange(
+                MakePoint({std::nullopt}), true, // {null} = {null, +inf} > {null, 1} > {null, null}, so there is {null} instead {null, 1}
+                MakePoint({20, 20}), true
+                );
+
+            Cerr << " correct " << DebugPrintRange(pairType, correct.ToTableRange(), *typeRegistry);
+
+            CheckRange(pairType, correct.ToTableRange(), range);
+            Cerr << Endl;
+        }
+
+        {
+            //=================
             //-----------[aaa]---
             //----[bbb]----------
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(5), true
+                MakePoint({1}), true,
+                MakePoint({5}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -89,14 +166,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-----------[aaa]---
             //----[bbbbbb]-------
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(10), true
+                MakePoint({1}), true,
+                MakePoint({10}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -104,8 +181,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), true,
-                MakeValue(10), true
+                MakePoint({10}), true,
+                MakePoint({10}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -120,14 +197,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-----------[aaa]---
             //----[bbbbbbbb]-----
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(15), true
+                MakePoint({1}), true,
+                MakePoint({15}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -135,8 +212,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), true,
-                MakeValue(15), true
+                MakePoint({10}), true,
+                MakePoint({15}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -150,14 +227,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-----------[aaa]---
             //----[bbbbbbbbbb]---
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(20), true
+                MakePoint({1}), true,
+                MakePoint({20}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -165,8 +242,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -180,14 +257,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //---------[aaa]----
             //--[bbbbbbbbbbbbb]-
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(30), true
+                MakePoint({1}), true,
+                MakePoint({30}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -195,8 +272,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -211,14 +288,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //----[aaaaaa]----------
             //----[]----------
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(10), true,
-                MakeValue(10), true
+                MakePoint({10}), true,
+                MakePoint({10}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -226,8 +303,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), true,
-                MakeValue(10), true
+                MakePoint({10}), true,
+                MakePoint({10}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -241,14 +318,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //----[aaaaaa]----------
             //----[bbb]----------
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(10), true,
-                MakeValue(15), true
+                MakePoint({10}), true,
+                MakePoint({15}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -256,8 +333,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), true,
-                MakeValue(15), true
+                MakePoint({10}), true,
+                MakePoint({15}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -272,14 +349,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //----[aaaaaa]----------
             //----[bbbbbb]----------
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -287,8 +364,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -303,14 +380,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //----[aaaaaa]----------
             //----[bbbbbbbb]----------
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(10), true,
-                MakeValue(30), true
+                MakePoint({10}), true,
+                MakePoint({30}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -318,8 +395,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -333,14 +410,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-----[aaaaaaa]----------
             //-------[bbb]----------
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(15), true,
-                MakeValue(17), true
+                MakePoint({15}), true,
+                MakePoint({17}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -348,8 +425,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(15), true,
-                MakeValue(17), true
+                MakePoint({15}), true,
+                MakePoint({17}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -363,14 +440,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-----[aaaaaaa]----------
             //-------[bbbbb]----------
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(15), true,
-                MakeValue(20), true
+                MakePoint({15}), true,
+                MakePoint({20}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -378,8 +455,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(15), true,
-                MakeValue(20), true
+                MakePoint({15}), true,
+                MakePoint({20}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -393,14 +470,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-----[aaaaaaa]----------
             //-------[bbbbbbb]----------
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(15), true,
-                MakeValue(30), true
+                MakePoint({15}), true,
+                MakePoint({30}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -408,8 +485,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(15), true,
-                MakeValue(20), true
+                MakePoint({15}), true,
+                MakePoint({20}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -423,14 +500,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-----[aaa]----------
             //---------[]----------
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(20), true,
-                MakeValue(20), true
+                MakePoint({20}), true,
+                MakePoint({20}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -438,8 +515,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(20), true,
-                MakeValue(20), true
+                MakePoint({20}), true,
+                MakePoint({20}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -453,14 +530,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-----[aaa]----------
             //---------[bbb]----------
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(20), true,
-                MakeValue(30), true
+                MakePoint({20}), true,
+                MakePoint({30}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -468,8 +545,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(20), true,
-                MakeValue(20), true
+                MakePoint({20}), true,
+                MakePoint({20}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -483,14 +560,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-----[aaa]----------
             //------------[bbb]---
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(25), true,
-                MakeValue(30), true
+                MakePoint({25}), true,
+                MakePoint({30}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -507,14 +584,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-----------(aaa]---
             //----[bbbbbb]-------
             auto first = MakeRange(
-                MakeValue(10), false,
-                MakeValue(20), true
+                MakePoint({10}), false,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(10), true
+                MakePoint({1}), true,
+                MakePoint({10}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -531,14 +608,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-----------[aaa]---
             //----[bbbbbb)-------
             auto first = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), true
+                MakePoint({10}), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(10), false
+                MakePoint({1}), true,
+                MakePoint({10}), false
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -555,14 +632,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-----------(aaa]---
             //----[bbbbbb)-------
             auto first = MakeRange(
-                MakeValue(10), false,
-                MakeValue(20), true
+                MakePoint({10}), false,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(10), false
+                MakePoint({1}), true,
+                MakePoint({10}), false
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -579,14 +656,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //---------(aaa]---
             //----[bbbbbb]-------
             auto first = MakeRange(
-                MakeValue(10), false,
-                MakeValue(20), true
+                MakePoint({10}), false,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(15), true
+                MakePoint({1}), true,
+                MakePoint({15}), true
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -594,8 +671,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), false,
-                MakeValue(15), true
+                MakePoint({10}), false,
+                MakePoint({15}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -609,14 +686,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //---------(aaa]---
             //----[bbbbbb)-------
             auto first = MakeRange(
-                MakeValue(10), false,
-                MakeValue(20), true
+                MakePoint({10}), false,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(15), false
+                MakePoint({1}), true,
+                MakePoint({15}), false
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -624,8 +701,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), false,
-                MakeValue(15), false
+                MakePoint({10}), false,
+                MakePoint({15}), false
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -639,14 +716,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //---------(aaa]---
             //----[bbbbbbbb)-------
             auto first = MakeRange(
-                MakeValue(10), false,
-                MakeValue(20), true
+                MakePoint({10}), false,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(20), false
+                MakePoint({1}), true,
+                MakePoint({20}), false
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -654,8 +731,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), false,
-                MakeValue(20), false
+                MakePoint({10}), false,
+                MakePoint({20}), false
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -669,14 +746,14 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //---------(aaa)---
             //----[bbbbbbbb)-------
             auto first = MakeRange(
-                MakeValue(10), false,
-                MakeValue(20), false
+                MakePoint({10}), false,
+                MakePoint({20}), false
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(20), false
+                MakePoint({1}), true,
+                MakePoint({20}), false
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -684,8 +761,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), false,
-                MakeValue(20), false
+                MakePoint({10}), false,
+                MakePoint({20}), false
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -699,15 +776,15 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //(-inf;        +inf)
             //----[bbbbbbbb)-------
             auto first = MakeRange(
-                MakeLeftInf(), true,
+                MakeLeftInf(valueType.size()), true,
                 MakeRightInf(), false
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
             Y_ASSERT(!first.ToTableRange().IsEmptyRange(valueType));
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(20), false
+                MakePoint({1}), true,
+                MakePoint({20}), false
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -715,8 +792,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(1), true,
-                MakeValue(20), false
+                MakePoint({1}), true,
+                MakePoint({20}), false
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -730,15 +807,15 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-------[aaaaa  +inf)
             //----[bbbbbbbb)-------
             auto first = MakeRange(
-                MakeValue(10), true,
+                MakePoint({10}), true,
                 MakeRightInf(), false
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
             Y_ASSERT(!first.ToTableRange().IsEmptyRange(valueType));
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(20), false
+                MakePoint({1}), true,
+                MakePoint({20}), false
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -746,8 +823,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), true,
-                MakeValue(20), false
+                MakePoint({10}), true,
+                MakePoint({20}), false
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -761,15 +838,15 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //--------(aaaaa  +inf)
             //----[bbb)-------
             auto first = MakeRange(
-                MakeValue(10), false,
+                MakePoint({10}), false,
                 MakeRightInf(), false
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
             Y_ASSERT(!first.ToTableRange().IsEmptyRange(valueType));
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(10), false
+                MakePoint({1}), true,
+                MakePoint({10}), false
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -786,15 +863,15 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //-------(aaaaa  +inf)
             //----[bbbbbbbb)-------
             auto first = MakeRange(
-                MakeValue(10), false,
+                MakePoint({10}), false,
                 MakeRightInf(), false
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
             Y_ASSERT(!first.ToTableRange().IsEmptyRange(valueType));
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(20), false
+                MakePoint({1}), true,
+                MakePoint({20}), false
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -802,8 +879,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(10), false,
-                MakeValue(20), false
+                MakePoint({10}), false,
+                MakePoint({20}), false
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -817,15 +894,15 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //(-inf;  aaa]------
             //----[bbbbbbbb)-------
             auto first = MakeRange(
-                MakeLeftInf(), true,
-                MakeValue(10), true
+                MakeLeftInf(valueType.size()), true,
+                MakePoint({10}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
             Y_ASSERT(!first.ToTableRange().IsEmptyRange(valueType));
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(20), false
+                MakePoint({1}), true,
+                MakePoint({20}), false
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -833,8 +910,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(1), true,
-                MakeValue(10), true
+                MakePoint({1}), true,
+                MakePoint({10}), true
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
@@ -848,15 +925,15 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             //(-inf;       aaa]------
             //----[bbbbbbbb)-------
             auto first = MakeRange(
-                MakeLeftInf(), true,
-                MakeValue(20), true
+                MakeLeftInf(valueType.size()), true,
+                MakePoint({20}), true
                 );
             Cerr << "first " << DebugPrintRange(valueType, first.ToTableRange(), *typeRegistry);
             Y_ASSERT(!first.ToTableRange().IsEmptyRange(valueType));
 
             auto second = MakeRange(
-                MakeValue(1), true,
-                MakeValue(10), false
+                MakePoint({1}), true,
+                MakePoint({10}), false
                 );
             Cerr << " second " << DebugPrintRange(valueType, second.ToTableRange(), *typeRegistry);
 
@@ -864,8 +941,8 @@ Y_UNIT_TEST_SUITE(RangeOps) {
             Cerr << " result " << DebugPrintRange(valueType, range, *typeRegistry);
 
             auto correct = MakeRange(
-                MakeValue(1), true,
-                MakeValue(10), false
+                MakePoint({1}), true,
+                MakePoint({10}), false
                 );
 
             Cerr << " correct " << DebugPrintRange(valueType, correct.ToTableRange(), *typeRegistry);
diff --git a/ydb/core/tx/schemeshard/schemeshard__init.cpp b/ydb/core/tx/schemeshard/schemeshard__init.cpp
index 03958dedda..20248f6d8f 100644
--- a/ydb/core/tx/schemeshard/schemeshard__init.cpp
+++ b/ydb/core/tx/schemeshard/schemeshard__init.cpp
@@ -4208,13 +4208,12 @@ struct TSchemeShard::TTxInit : public TTransactionBase<TSchemeShard> {
                     TShardIdx shardIdx = TShardIdx(rowset.GetValue<Schema::IndexBuildShardStatus::OwnerShardIdx>(),
                                                    rowset.GetValue<Schema::IndexBuildShardStatus::LocalShardIdx>());
 
-
-                    TIndexBuildInfo::TShardStatus& shardStatus = buildInfo->Shards[shardIdx];
-
                     NKikimrTx::TKeyRange range = rowset.GetValue<Schema::IndexBuildShardStatus::Range>();
-                    shardStatus.Range.Load(range);
+                    TString lastKeyAck = rowset.GetValue<Schema::IndexBuildShardStatus::LastKeyAck>();
+
+                    buildInfo->Shards.emplace(shardIdx, TIndexBuildInfo::TShardStatus(TSerializedTableRange(range), std::move(lastKeyAck)));
+                    TIndexBuildInfo::TShardStatus& shardStatus = buildInfo->Shards.at(shardIdx);
 
-                    shardStatus.LastKeyAck = rowset.GetValue<Schema::IndexBuildShardStatus::LastKeyAck>();
                     shardStatus.Status = rowset.GetValue<Schema::IndexBuildShardStatus::Status>();
 
                     shardStatus.DebugMessage = rowset.GetValueOrDefault<Schema::IndexBuildShardStatus::Message>();
diff --git a/ydb/core/tx/schemeshard/schemeshard_build_index__progress.cpp b/ydb/core/tx/schemeshard/schemeshard_build_index__progress.cpp
index a5fbbae703..50e484da10 100644
--- a/ydb/core/tx/schemeshard/schemeshard_build_index__progress.cpp
+++ b/ydb/core/tx/schemeshard/schemeshard_build_index__progress.cpp
@@ -420,12 +420,22 @@ public:
         return true;
     }
 
+    TSerializedTableRange InfiniteRange(ui32 columns) {
+        TVector<TCell> vec(columns, TCell());
+        TArrayRef<TCell> cells(vec);
+        return TSerializedTableRange(TSerializedCellVec::Serialize(cells), "", true, false);
+    }
+
     void InitiateShards(NIceDb::TNiceDb& db, TIndexBuildInfo::TPtr& buildInfo) {
         TTableInfo::TPtr table = Self->Tables.at(buildInfo->TablePathId);
+
+        auto tableColumns = NTableIndex::ExtractInfo(table); // skip dropped columns
+        const TSerializedTableRange infiniteRange = InfiniteRange(tableColumns.Keys.size());
+
         for (const auto& x: table->GetPartitions()) {
             Y_VERIFY(Self->ShardInfos.contains(x.ShardIdx));
 
-            buildInfo->Shards.emplace(x.ShardIdx, TIndexBuildInfo::TShardStatus());
+            buildInfo->Shards.emplace(x.ShardIdx, TIndexBuildInfo::TShardStatus(infiniteRange, ""));
             Self->PersistBuildIndexUploadInitiate(db, buildInfo, x.ShardIdx);
         }
     }
@@ -662,7 +672,7 @@ public:
             }
 
             if (record.HasLastKeyAck()) {
-                {
+                if (shardStatus.LastKeyAck) {
                     //check that all LastKeyAcks are monotonously increase
                     TTableInfo::TPtr tableInfo = Self->Tables.at(buildInfo->TablePathId);
                     TVector<ui16> keyTypes;
diff --git a/ydb/core/tx/schemeshard/schemeshard_info_types.cpp b/ydb/core/tx/schemeshard/schemeshard_info_types.cpp
index b5a9000841..9057806cb8 100644
--- a/ydb/core/tx/schemeshard/schemeshard_info_types.cpp
+++ b/ydb/core/tx/schemeshard/schemeshard_info_types.cpp
@@ -1727,14 +1727,10 @@ void TImportInfo::AddNotifySubscriber(const TActorId &actorId) {
     Subscribers.insert(actorId);
 }
 
-TIndexBuildInfo::TShardStatus::TShardStatus() {
-    TCell cell;
-    TVector<TCell> vec = {cell};
-    TArrayRef<TCell> cells(vec);
-    Range = TSerializedTableRange(TSerializedCellVec::Serialize(cells), "", true, false);
-
-    LastKeyAck = Range.From.GetBuffer();  // -inf
-}
+TIndexBuildInfo::TShardStatus::TShardStatus(TSerializedTableRange range, TString lastKeyAck)
+    : Range(std::move(range))
+    , LastKeyAck(std::move(lastKeyAck))
+{}
 
 TColumnFamiliesMerger::TColumnFamiliesMerger(NKikimrSchemeOp::TPartitionConfig &container)
     : Container(container)
diff --git a/ydb/core/tx/schemeshard/schemeshard_info_types.h b/ydb/core/tx/schemeshard/schemeshard_info_types.h
index cae07292f8..e241dd170b 100644
--- a/ydb/core/tx/schemeshard/schemeshard_info_types.h
+++ b/ydb/core/tx/schemeshard/schemeshard_info_types.h
@@ -2580,7 +2580,7 @@ struct TIndexBuildInfo: public TSimpleRefCount<TIndexBuildInfo> {
         TBillingStats Processed;
         TBillingStats Billed;
 
-        TShardStatus();
+        TShardStatus(TSerializedTableRange range, TString lastKeyAck);
 
         TString ToString(TShardIdx shardIdx = InvalidShardIdx) const {
             TStringBuilder result;
diff --git a/ydb/core/tx/schemeshard/ut_index_build_reboots.cpp b/ydb/core/tx/schemeshard/ut_index_build_reboots.cpp
index fb1c5a571a..3cff74817f 100644
--- a/ydb/core/tx/schemeshard/ut_index_build_reboots.cpp
+++ b/ydb/core/tx/schemeshard/ut_index_build_reboots.cpp
@@ -9,6 +9,8 @@ using namespace NSchemeShardUT_Private;
 static void WriteRows(TTestActorRuntime& runtime, ui64 tabletId, ui32 key, ui32 index) {
     TString writeQuery = Sprintf(R"(
         (
+            (let keyNull   '( '('key   (Null) ) ) )
+            (let row0   '( '('index (Uint32 '%u ) )  '('value (Utf8 'aaaa) ) ) )
             (let key0   '( '('key   (Uint32 '%u ) ) ) )
             (let row0   '( '('index (Uint32 '%u ) )  '('value (Utf8 'aaaa) ) ) )
             (let key1   '( '('key   (Uint32 '%u ) ) ) )
@@ -31,6 +33,7 @@ static void WriteRows(TTestActorRuntime& runtime, ui64 tabletId, ui32 key, ui32
             (let row9   '( '('index (Uint32 '%u ) )  '('value (Utf8 'aaaa) ) ) )
 
             (return (AsList
+                        (UpdateRow '__user__Table keyNull row0)
                         (UpdateRow '__user__Table key0 row0)
                         (UpdateRow '__user__Table key1 row1)
                         (UpdateRow '__user__Table key2 row2)
@@ -45,6 +48,7 @@ static void WriteRows(TTestActorRuntime& runtime, ui64 tabletId, ui32 key, ui32
             )
         )
     )",
+         1000*index + 0,
          1000*key + 0, 1000*index + 0,
          1000*key + 1, 1000*index + 1,
          1000*key + 2, 1000*index + 2,
@@ -84,6 +88,26 @@ Y_UNIT_TEST_SUITE(IndexBuildTestReboots) {
                 for (ui32 delta = 0; delta < 2; ++delta) {
                     WriteRows(runtime, TTestTxConfig::FakeHiveTablets, 1 + delta, 100 + delta);
                 }
+
+                // Check src shard has the lead key as null
+                {
+                    NKikimrMiniKQL::TResult result;
+                    TString err;
+                    ui32 status = LocalMiniKQL(runtime, TTestTxConfig::FakeHiveTablets, R"(
+                    (
+                        (let range '('('key (Null) (Void))))
+                        (let columns '('key 'index))
+                        (let result (SelectRange '__user__Table range columns '()))
+                        (return (AsList (SetResult 'Result result)))
+                    )
+                    )", result, err);
+
+                    UNIT_ASSERT_VALUES_EQUAL_C(status, static_cast<ui32>(NKikimrProto::OK), err);
+                    UNIT_ASSERT_VALUES_EQUAL(err, "");
+
+                    //                                   V -- here the null key
+                    NKqp::CompareYson(R"([[[[[["101000"];#];[["100000"];["1000"]];[["100001"];["1001"]];[["100002"];["1002"]];[["100003"];["1003"]];[["100004"];["1004"]];[["100005"];["1005"]];[["100006"];["1006"]];[["100007"];["1007"]];[["100008"];["1008"]];[["100009"];["1009"]];[["101000"];["2000"]];[["101001"];["2001"]];[["101002"];["2002"]];[["101003"];["2003"]];[["101004"];["2004"]];[["101005"];["2005"]];[["101006"];["2006"]];[["101007"];["2007"]];[["101008"];["2008"]];[["101009"];["2009"]]];%false]]])", result);
+                }
             }
 
             AsyncBuilIndex(runtime,  ++t.TxId, TTestTxConfig::SchemeShard, "/MyRoot", "/MyRoot/dir/Table", "index1", {"index"});
@@ -120,7 +144,7 @@ Y_UNIT_TEST_SUITE(IndexBuildTestReboots) {
                 TString err;
                 ui32 status = LocalMiniKQL(runtime, TTestTxConfig::FakeHiveTablets+2, R"(
                 (
-                    (let range '( '('index (Uint32 '0) (Void) )  '('key (Uint32 '0) (Void) )))
+                    (let range '( '('index (Null) (Void))  '('key (Null) (Void))))
                     (let columns '('key 'index) )
                     (let result (SelectRange '__user__indexImplTable range columns '()))
                     (return (AsList (SetResult 'Result result) ))
@@ -130,7 +154,8 @@ Y_UNIT_TEST_SUITE(IndexBuildTestReboots) {
                 UNIT_ASSERT_VALUES_EQUAL_C(status, static_cast<ui32>(NKikimrProto::OK), err);
                 UNIT_ASSERT_VALUES_EQUAL(err, "");
 
-                NKqp::CompareYson(R"([[[[[["100000"];["1000"]];[["100001"];["1001"]];[["100002"];["1002"]];[["100003"];["1003"]];[["100004"];["1004"]];[["100005"];["1005"]];[["100006"];["1006"]];[["100007"];["1007"]];[["100008"];["1008"]];[["100009"];["1009"]];[["101000"];["2000"]];[["101001"];["2001"]];[["101002"];["2002"]];[["101003"];["2003"]];[["101004"];["2004"]];[["101005"];["2005"]];[["101006"];["2006"]];[["101007"];["2007"]];[["101008"];["2008"]];[["101009"];["2009"]]];%false]]])", result);
+                // record with null is there ->                                                                                                                                                                                                                                  V -- here is the null
+                NKqp::CompareYson(R"([[[[[["100000"];["1000"]];[["100001"];["1001"]];[["100002"];["1002"]];[["100003"];["1003"]];[["100004"];["1004"]];[["100005"];["1005"]];[["100006"];["1006"]];[["100007"];["1007"]];[["100008"];["1008"]];[["100009"];["1009"]];[["101000"];#];[["101000"];["2000"]];[["101001"];["2001"]];[["101002"];["2002"]];[["101003"];["2003"]];[["101004"];["2004"]];[["101005"];["2005"]];[["101006"];["2006"]];[["101007"];["2007"]];[["101008"];["2008"]];[["101009"];["2009"]]];%false]]])", result);
             }
         });
     }
@@ -200,7 +225,7 @@ Y_UNIT_TEST_SUITE(IndexBuildTestReboots) {
                 UNIT_ASSERT_VALUES_EQUAL_C(status, static_cast<ui32>(NKikimrProto::OK), err);
                 UNIT_ASSERT_VALUES_EQUAL(err, "");
 
-                NKqp::CompareYson(R"([[[[[["100000"];["1000"];["aaaa"]];[["100001"];["1001"];["aaaa"]];[["100002"];["1002"];["aaaa"]];[["100003"];["1003"];["aaaa"]];[["100004"];["1004"];["aaaa"]];[["100005"];["1005"];["aaaa"]];[["100006"];["1006"];["aaaa"]];[["100007"];["1007"];["aaaa"]];[["100008"];["1008"];["aaaa"]];[["100009"];["1009"];["aaaa"]];[["101000"];["2000"];["aaaa"]];[["101001"];["2001"];["aaaa"]];[["101002"];["2002"];["aaaa"]];[["101003"];["2003"];["aaaa"]];[["101004"];["2004"];["aaaa"]];[["101005"];["2005"];["aaaa"]];[["101006"];["2006"];["aaaa"]];[["101007"];["2007"];["aaaa"]];[["101008"];["2008"];["aaaa"]];[["101009"];["2009"];["aaaa"]]];%false]]])", result);
+                NKqp::CompareYson(R"([[[[[["100000"];["1000"];["aaaa"]];[["100001"];["1001"];["aaaa"]];[["100002"];["1002"];["aaaa"]];[["100003"];["1003"];["aaaa"]];[["100004"];["1004"];["aaaa"]];[["100005"];["1005"];["aaaa"]];[["100006"];["1006"];["aaaa"]];[["100007"];["1007"];["aaaa"]];[["100008"];["1008"];["aaaa"]];[["100009"];["1009"];["aaaa"]];[["101000"];#;["aaaa"]];[["101000"];["2000"];["aaaa"]];[["101001"];["2001"];["aaaa"]];[["101002"];["2002"];["aaaa"]];[["101003"];["2003"];["aaaa"]];[["101004"];["2004"];["aaaa"]];[["101005"];["2005"];["aaaa"]];[["101006"];["2006"];["aaaa"]];[["101007"];["2007"];["aaaa"]];[["101008"];["2008"];["aaaa"]];[["101009"];["2009"];["aaaa"]]];%false]]])", result);
             }
         });
     }