diff --git a/ydb/library/yql/core/type_ann/type_ann_blocks.cpp b/ydb/library/yql/core/type_ann/type_ann_blocks.cpp
index be0b2b7edc35..a6350053839d 100644
--- a/ydb/library/yql/core/type_ann/type_ann_blocks.cpp
+++ b/ydb/library/yql/core/type_ann/type_ann_blocks.cpp
@@ -115,13 +115,24 @@ IGraphTransformer::TStatus BlockExpandChunkedWrapper(const TExprNode::TPtr& inpu
         return IGraphTransformer::TStatus::Error;
     }
 
+    TTypeAnnotationNode::TListType itemTypes;
     TTypeAnnotationNode::TListType blockItemTypes;
-    if (!EnsureWideFlowBlockType(input->Head(), blockItemTypes, ctx.Expr)) {
-        return IGraphTransformer::TStatus::Error;
-    }
 
-    auto flowItemTypes = input->Head().GetTypeAnn()->Cast<TFlowExprType>()->GetItemType()->Cast<TMultiExprType>()->GetItems();
-    bool allScalars = AllOf(flowItemTypes, [](const TTypeAnnotationNode* item) { return item->GetKind() == ETypeAnnotationKind::Scalar; });
+    if (input->Head().GetTypeAnn()->GetKind() == ETypeAnnotationKind::Stream) {
+        if (!EnsureWideStreamBlockType(input->Head(), blockItemTypes, ctx.Expr)) {
+            return IGraphTransformer::TStatus::Error;
+        }
+
+        itemTypes = input->Head().GetTypeAnn()->Cast<TStreamExprType>()->GetItemType()->Cast<TMultiExprType>()->GetItems();
+    } else {
+        if (!EnsureWideFlowBlockType(input->Head(), blockItemTypes, ctx.Expr)) {
+            return IGraphTransformer::TStatus::Error;
+        }
+
+        itemTypes = input->Head().GetTypeAnn()->Cast<TFlowExprType>()->GetItemType()->Cast<TMultiExprType>()->GetItems();
+    }
+    
+    bool allScalars = AllOf(itemTypes, [](const TTypeAnnotationNode* item) { return item->GetKind() == ETypeAnnotationKind::Scalar; });
     if (allScalars) {
         output = input->HeadPtr();
         return IGraphTransformer::TStatus::Repeat;
diff --git a/ydb/library/yql/minikql/comp_nodes/mkql_blocks.cpp b/ydb/library/yql/minikql/comp_nodes/mkql_blocks.cpp
index a719c116f9ab..9e86008d66c3 100644
--- a/ydb/library/yql/minikql/comp_nodes/mkql_blocks.cpp
+++ b/ydb/library/yql/minikql/comp_nodes/mkql_blocks.cpp
@@ -1120,6 +1120,52 @@ using TBaseComputation = TStatefulWideFlowCodegeneratorNode<TBlockExpandChunkedW
     const size_t WideFieldsIndex_;
 };
 
+class TBlockExpandChunkedStreamWrapper : public TMutableComputationNode<TBlockExpandChunkedStreamWrapper> {
+using TBaseComputation =  TMutableComputationNode<TBlockExpandChunkedStreamWrapper>;
+class TExpanderState : public TComputationValue<TExpanderState> {
+using TBase = TComputationValue<TExpanderState>;
+public:
+    TExpanderState(TMemoryUsageInfo* memInfo, TComputationContext& ctx, NUdf::TUnboxedValue&& stream, size_t width)
+        : TBase(memInfo), HolderFactory_(ctx.HolderFactory), State_(ctx.HolderFactory.Create<TBlockState>(width)), Stream_(stream) {}
+
+    NUdf::EFetchStatus WideFetch(NUdf::TUnboxedValue* output, ui32 width) {
+        auto& s = *static_cast<TBlockState*>(State_.AsBoxed().Get());
+        if (!s.Count) {
+            s.ClearValues();
+            auto result = Stream_.WideFetch(s.Values.data(), width);
+            if (NUdf::EFetchStatus::Ok != result) {
+                return result;
+            }
+            s.FillArrays();
+        }
+        
+        const auto sliceSize = s.Slice();
+        for (size_t i = 0; i < width; ++i) {
+            output[i] = s.Get(sliceSize, HolderFactory_, i);
+        }
+        return NUdf::EFetchStatus::Ok;
+    }
+
+private:
+    const THolderFactory& HolderFactory_;
+    NUdf::TUnboxedValue State_;
+    NUdf::TUnboxedValue Stream_;
+};
+public:
+    TBlockExpandChunkedStreamWrapper(TComputationMutables& mutables, IComputationNode* stream, size_t width)
+        : TBaseComputation(mutables, EValueRepresentation::Boxed)
+        , Stream_(stream)
+        , Width_(width) {}
+
+    NUdf::TUnboxedValuePod DoCalculate(TComputationContext& ctx) const {
+        return ctx.HolderFactory.Create<TExpanderState>(ctx, std::move(Stream_->GetValue(ctx)), Width_);
+    }
+    void RegisterDependencies() const override {}
+private:
+    IComputationNode* const Stream_;
+    const size_t Width_;
+};
+
 } // namespace
 
 IComputationNode* WrapToBlocks(TCallable& callable, const TComputationNodeFactoryContext& ctx) {
@@ -1184,13 +1230,21 @@ IComputationNode* WrapReplicateScalar(TCallable& callable, const TComputationNod
 
 IComputationNode* WrapBlockExpandChunked(TCallable& callable, const TComputationNodeFactoryContext& ctx) {
     MKQL_ENSURE(callable.GetInputsCount() == 1, "Expected 1 args, got " << callable.GetInputsCount());
-
-    const auto flowType = AS_TYPE(TFlowType, callable.GetInput(0).GetStaticType());
-    const auto wideComponents = GetWideComponents(flowType);
-
-    const auto wideFlow = dynamic_cast<IComputationWideFlowNode*>(LocateNode(ctx.NodeLocator, callable, 0));
-    MKQL_ENSURE(wideFlow != nullptr, "Expected wide flow node");
-    return new TBlockExpandChunkedWrapper(ctx.Mutables, wideFlow, wideComponents.size());
+    if (callable.GetInput(0).GetStaticType()->IsStream()) {
+        const auto streamType = AS_TYPE(TStreamType, callable.GetInput(0).GetStaticType());
+        const auto wideComponents = GetWideComponents(streamType);
+        const auto computation = dynamic_cast<IComputationNode*>(LocateNode(ctx.NodeLocator, callable, 0));
+
+        MKQL_ENSURE(computation != nullptr, "Expected computation node");
+        return new TBlockExpandChunkedStreamWrapper(ctx.Mutables, computation, wideComponents.size());
+    } else {
+        const auto flowType = AS_TYPE(TFlowType, callable.GetInput(0).GetStaticType());
+        const auto wideComponents = GetWideComponents(flowType);
+
+        const auto wideFlow = dynamic_cast<IComputationWideFlowNode*>(LocateNode(ctx.NodeLocator, callable, 0));
+        MKQL_ENSURE(wideFlow != nullptr, "Expected wide flow node");
+        return new TBlockExpandChunkedWrapper(ctx.Mutables, wideFlow, wideComponents.size());
+    }
 }
 
 }
diff --git a/ydb/library/yql/minikql/mkql_program_builder.cpp b/ydb/library/yql/minikql/mkql_program_builder.cpp
index c12742d9a606..c57e118ab126 100644
--- a/ydb/library/yql/minikql/mkql_program_builder.cpp
+++ b/ydb/library/yql/minikql/mkql_program_builder.cpp
@@ -228,6 +228,24 @@ bool ReduceOptionalElements(const TType* type, const TArrayRef<const ui32>& test
     return multiOptional;
 }
 
+std::vector<TType*> ValidateBlockStreamType(const TType* streamType) {
+    const auto wideComponents = GetWideComponents(AS_TYPE(TStreamType, streamType));
+    MKQL_ENSURE(wideComponents.size() > 0, "Expected at least one column");
+    std::vector<TType*> streamItems;
+    streamItems.reserve(wideComponents.size());
+    bool isScalar;
+    for (size_t i = 0; i < wideComponents.size(); ++i) {
+        auto blockType = AS_TYPE(TBlockType, wideComponents[i]);
+        isScalar = blockType->GetShape() == TBlockType::EShape::Scalar;
+        auto withoutBlock = blockType->GetItemType();
+        streamItems.push_back(withoutBlock);
+    }
+
+    MKQL_ENSURE(isScalar, "Last column should be scalar");
+    MKQL_ENSURE(AS_TYPE(TDataType, streamItems.back())->GetSchemeType() == NUdf::TDataType<ui64>::Id, "Expected Uint64");
+    return streamItems;
+}
+
 std::vector<TType*> ValidateBlockFlowType(const TType* flowType) {
     const auto wideComponents = GetWideComponents(AS_TYPE(TFlowType, flowType));
     MKQL_ENSURE(wideComponents.size() > 0, "Expected at least one column");
@@ -1550,10 +1568,14 @@ TRuntimeNode TProgramBuilder::BlockCompress(TRuntimeNode flow, ui32 bitmapIndex)
     return TRuntimeNode(callableBuilder.Build(), false);
 }
 
-TRuntimeNode TProgramBuilder::BlockExpandChunked(TRuntimeNode flow) {
-    ValidateBlockFlowType(flow.GetStaticType());
-    TCallableBuilder callableBuilder(Env, __func__, flow.GetStaticType());
-    callableBuilder.Add(flow);
+TRuntimeNode TProgramBuilder::BlockExpandChunked(TRuntimeNode comp) {
+    if (comp.GetStaticType()->IsStream()) {
+        ValidateBlockStreamType(comp.GetStaticType());
+    } else {
+        ValidateBlockFlowType(comp.GetStaticType());
+    }
+    TCallableBuilder callableBuilder(Env, __func__, comp.GetStaticType());
+    callableBuilder.Add(comp);
     return TRuntimeNode(callableBuilder.Build(), false);
 }
 
diff --git a/ydb/library/yql/providers/dq/opt/dqs_opt.cpp b/ydb/library/yql/providers/dq/opt/dqs_opt.cpp
index 994de78b22b5..f6b7d10acdc7 100644
--- a/ydb/library/yql/providers/dq/opt/dqs_opt.cpp
+++ b/ydb/library/yql/providers/dq/opt/dqs_opt.cpp
@@ -94,12 +94,13 @@ namespace NYql::NDqs {
 
                     YQL_CLOG(INFO, ProviderDq) << "DqsRewritePhyBlockReadOnDqIntegration";
                     return Build<TCoWideFromBlocks>(ctx, node->Pos())
-                            .Input(Build<TCoToFlow>(ctx, node->Pos())
+                            .Input(
+                                Build<TCoToFlow>(ctx, node->Pos())
                                 .Input(Build<TDqReadBlockWideWrap>(ctx, node->Pos())
-                                        .Input(readWideWrap.Input())
-                                        .Flags(readWideWrap.Flags())
-                                        .Token(readWideWrap.Token())
-                                    .Done())
+                                                .Input(readWideWrap.Input())
+                                                .Flags(readWideWrap.Flags())
+                                                .Token(readWideWrap.Token())
+                                            .Done().Ptr())
                                 .Done())
                             .Done().Ptr();
                 }, ctx, optSettings);
diff --git a/ydb/library/yql/providers/yt/provider/yql_yt_mkql_compiler.cpp b/ydb/library/yql/providers/yt/provider/yql_yt_mkql_compiler.cpp
index d4cf3f1d5a68..88babe788429 100644
--- a/ydb/library/yql/providers/yt/provider/yql_yt_mkql_compiler.cpp
+++ b/ydb/library/yql/providers/yt/provider/yql_yt_mkql_compiler.cpp
@@ -495,11 +495,11 @@ void RegisterDqYtMkqlCompilers(NCommon::TMkqlCallableCompilerBase& compiler, con
                 for (const auto& flag : wrapper.Flags())
                     if (solid = flag.Value() == "Solid")
                         break;
-
-                if (solid)
-                    return BuildDqYtInputCall<false>(outputType, inputItemType, cluster, tokenName, ytRead.Input(), state, ctx, inflight, timeout, true && inflight);
-                else
-                    return BuildDqYtInputCall<true>(outputType, inputItemType, cluster, tokenName, ytRead.Input(), state, ctx, inflight, timeout, true && inflight);
+                return ctx.ProgramBuilder.BlockExpandChunked(
+                    solid
+                    ? BuildDqYtInputCall<false>(outputType, inputItemType, cluster, tokenName, ytRead.Input(), state, ctx, inflight, timeout, true && inflight)
+                    : BuildDqYtInputCall<true>(outputType, inputItemType, cluster, tokenName, ytRead.Input(), state, ctx, inflight, timeout, true && inflight)
+                );
             }
 
             return TRuntimeNode();