Check missing fields in Cast constraints calculation

commit_hash:80d14b9a81504ea3fcb8d6fa89a2472f700c0f0e

1 files changed, 9 insertions, 3 deletions

diff --git a/yql/essentials/core/yql_expr_constraint.cpp b/yql/essentials/core/yql_expr_constraint.cpp
index fdfc21946be..e67557d9645 100644
--- a/yql/essentials/core/yql_expr_constraint.cpp
+++ b/yql/essentials/core/yql_expr_constraint.cpp
@@ -665,12 +665,18 @@ private:
         };
 
         const auto filterForUnique = [inItemType, outItemType](const TPartOfConstraintBase::TPathType& path) {
-            const auto castResult = CastResult<Strict>(TPartOfConstraintBase::GetSubTypeByPath(path, *inItemType), TPartOfConstraintBase::GetSubTypeByPath(path, *outItemType));
-            return NUdf::ECastOptions::Complete == castResult || NUdf::ECastOptions::MayFail == castResult;
+            if (const auto outType = TPartOfConstraintBase::GetSubTypeByPath(path, *outItemType)) {
+                const auto castResult = CastResult<Strict>(TPartOfConstraintBase::GetSubTypeByPath(path, *inItemType), outType);
+                return NUdf::ECastOptions::Complete == castResult || NUdf::ECastOptions::MayFail == castResult;
+            }
+            return false;
         };
 
         const auto filterForDistinct = [inItemType, outItemType](const TPartOfConstraintBase::TPathType& path) {
-            return NUdf::ECastOptions::Complete == CastResult<Strict>(TPartOfConstraintBase::GetSubTypeByPath(path, *inItemType), TPartOfConstraintBase::GetSubTypeByPath(path, *outItemType));
+            if (const auto outType = TPartOfConstraintBase::GetSubTypeByPath(path, *outItemType)) {
+                return NUdf::ECastOptions::Complete == CastResult<Strict>(TPartOfConstraintBase::GetSubTypeByPath(path, *inItemType), outType);
+            }
+            return false;
         };
 
         FilterFromHead<TSortedConstraintNode>(input, filter, ctx);