Make DateTime UDF overloads backward compatible. (#15776)

Author: lll-phill-lll

yql/essentials/udfs/common/datetime2/datetime_udf.cpp

@@ -262,7 +262,13 @@ struct TGetTimeComponent {
         }
 
         if (!userType) {
-            builder.SetError("User type is missing");
+            // XXX: Function became polymorphic when overload for
+            // wide resources was implemented. Hence, to make it
+            // backward compatible with previous versions, the
+            // absence of the userType is considered as using the
+            // old version (i.e. without type awareness) that
+            // provides implementation only for narrow dates.
+            BuildSignature<TFieldStorage, TMResourceName, Accessor>(builder, typesOnly);
             return true;
         }
 
@@ -1099,7 +1105,13 @@ class TGetDateComponent: public ::NYql::NUdf::TBoxedValue {
         }
 
         if (!userType) {
-            builder.SetError("User type is missing");
+            // XXX: Function became polymorphic when overload for
+            // wide resources was implemented. Hence, to make it
+            // backward compatible with previous versions, the
+            // absence of the userType is considered as using the
+            // old version (i.e. without type awareness) that
+            // provides implementation only for narrow dates.
+            BuildSignature<TResultType, TMResourceName, Accessor>(builder, typesOnly);
             return true;
         }
 
@@ -1207,7 +1219,13 @@ class TGetDateComponentName: public ::NYql::NUdf::TBoxedValue {
         }
 
         if (!userType) {
-            builder.SetError("User type is missing");
+            // XXX: Function became polymorphic when overload for
+            // wide resources was implemented. Hence, to make it
+            // backward compatible with previous versions, the
+            // absence of the userType is considered as using the
+            // old version (i.e. without type awareness) that
+            // provides implementation only for narrow dates.
+            BuildSignature<TMResourceName, Accessor>(builder, typesOnly);
             return true;
         }
 
@@ -1441,7 +1459,13 @@ TUnboxedValue GetTimezoneName(const IValueBuilder* valueBuilder, const TUnboxedV
             }
 
             if (!userType) {
-                builder.SetError("User type is missing");
+                // XXX: Function became polymorphic when overload for
+                // wide resources was implemented. Hence, to make it
+                // backward compatible with previous versions, the
+                // absence of the userType is considered as using the
+                // old version (i.e. without type awareness) that
+                // provides implementation only for narrow dates.
+                BuildSignature<TMResourceName>(builder, typesOnly);
                 return true;
             }
 
@@ -1737,7 +1761,13 @@ class TBoundaryOf: public ::NYql::NUdf::TBoxedValue {
         }
 
         if (!userType) {
-            builder.SetError("User type is missing");
+            // XXX: Function became polymorphic when overload for
+            // wide resources was implemented. Hence, to make it
+            // backward compatible with previous versions, the
+            // absence of the userType is considered as using the
+            // old version (i.e. without type awareness) that
+            // provides implementation only for narrow dates.
+            BuildSignature<TMResourceName, Boundary>(builder, typesOnly);
             return true;
         }
 
@@ -2112,7 +2142,13 @@ class TShift : public TBoxedValue {
         }
 
         if (!userType) {
-            builder.SetError("User type is missing");
+            // XXX: Function became polymorphic when overload for
+            // wide resources was implemented. Hence, to make it
+            // backward compatible with previous versions, the
+            // absence of the userType is considered as using the
+            // old version (i.e. without type awareness) that
+            // provides implementation only for narrow dates.
+            BuildSignature<TMResourceName, Shifter>(builder, typesOnly);
             return true;
         }