GH-43183: [C++] Add date to date cast

apache · Jul 8, 2024 · f214bee · f214bee
1 parent e8a795b
commit f214bee
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/cpp/src/arrow/compute/kernels/scalar_cast_temporal.cc b/cpp/src/arrow/compute/kernels/scalar_cast_temporal.cc
@@ -510,9 +510,12 @@ void AddCrossUnitCastNoPreallocate(CastFunction* func) {
 
 std::shared_ptr<CastFunction> GetDate32Cast() {
   auto func = std::make_shared<CastFunction>("cast_date32", Type::DATE32);
-  auto out_ty = date32();
+  const auto& out_ty = date32();
   AddCommonCasts(Type::DATE32, out_ty, func.get());
 
+  // date32 -> date32
+  AddCrossUnitCast<Date32Type>(func.get());
+
   // int32 -> date32
   AddZeroCopyCast(Type::INT32, int32(), date32(), func.get());
 
@@ -532,9 +535,12 @@ std::shared_ptr<CastFunction> GetDate32Cast() {
 
 std::shared_ptr<CastFunction> GetDate64Cast() {
   auto func = std::make_shared<CastFunction>("cast_date64", Type::DATE64);
-  auto out_ty = date64();
+  const auto out_ty = date64();
   AddCommonCasts(Type::DATE64, out_ty, func.get());
 
+  // date64 -> date64
+  AddCrossUnitCast<Date32Type>(func.get());
+
   // int64 -> date64
   AddZeroCopyCast(Type::INT64, int64(), date64(), func.get());