Enable EmitAggApply by default

Один из тестов локально канонизирован

vvvv@mr-nvme-testing-08:~/repo/arcadia/yql/tests/sql$ ya make -tA -F '*aggregate-library_error_in_aggregation_fail*' sql2yql yt_native_file dq_file
Number of suites skipped by name: 21, by filter *aggregate-library_error_in_aggregation_fail*

Total 3 suites:
        3 - GOOD
Total 11 tests:
        6 - GOOD
        5 - SKIPPED
Ok

rtmr тесты локально проходят

2 files changed, 12 insertions, 4 deletions

diff --git a/ydb/library/yql/core/type_ann/type_ann_list.cpp b/ydb/library/yql/core/type_ann/type_ann_list.cpp
index 9c53f05b4a5..ea1ecb57493 100644
--- a/ydb/library/yql/core/type_ann/type_ann_list.cpp
+++ b/ydb/library/yql/core/type_ann/type_ann_list.cpp
@@ -5286,6 +5286,11 @@ namespace {
         }
 
         auto itemType = input->Child(1)->GetTypeAnn()->Cast<TTypeExprType>()->GetType();
+        if (itemType->GetKind() == ETypeAnnotationKind::Unit) {
+            output = ctx.Expr.NewCallable(input->Pos(), "Void", {});
+            return IGraphTransformer::TStatus::Repeat;
+        }
+
         auto& lambda = input->ChildRef(2);
         const auto status = ConvertToLambda(lambda, ctx.Expr, 1);
         if (status.Level != IGraphTransformer::TStatus::Ok) {
diff --git a/ydb/library/yql/core/yql_aggregate_expander.cpp b/ydb/library/yql/core/yql_aggregate_expander.cpp
index e6c2ab22140..177755f7b15 100644
--- a/ydb/library/yql/core/yql_aggregate_expander.cpp
+++ b/ydb/library/yql/core/yql_aggregate_expander.cpp
@@ -1474,12 +1474,15 @@ TExprNode::TPtr TAggregateExpander::CountAggregateRewrite(const NNodes::TCoAggre
         }
 
         if (!isDistinct) {
-            if (IsDepended(traits->Child(2)->Tail(), traits->Child(2)->Head().Head())) {
-                return node.Ptr();
-            }
-
             if (traits->Head().Content() == "count") {
                 initVal = traits->Child(2)->TailPtr();
+                if (initVal->GetTypeAnn()->IsOptionalOrNull()) {
+                    if (IsDepended(traits->Child(2)->Tail(), traits->Child(2)->Head().Head())) {
+                        return node.Ptr();
+                    }
+                } else {
+                    initVal = nullptr;
+                }
             }
         }
     } else {