zanmato1984 commented on code in PR #48166:
URL: https://github.com/apache/arrow/pull/48166#discussion_r2573034844


##########
cpp/src/arrow/acero/hash_join.cc:
##########
@@ -306,12 +307,33 @@ class HashJoinBasicImpl : public HashJoinImpl {
 
     size_t num_probed_rows = match.size() + no_match.size();
     if (mask.is_scalar()) {
-      const auto& mask_scalar = mask.scalar_as<BooleanScalar>();
-      if (mask_scalar.is_valid && mask_scalar.value) {
-        // All rows passed, nothing left to do
-        return Status::OK();
+#if ARROW_LITTLE_ENDIAN
+       const auto& mask_scalar = mask.scalar_as<BooleanScalar>();
+       if (mask_scalar.is_valid && mask_scalar.value) {
+         // All rows passed, nothing left to do
+         return Status::OK();
+#else
+      // Check if the scalar is a BooleanScalar before casting
+      if (mask.scalar()->type->id() == Type::BOOL) {

Review Comment:
   Should be fixed by #48272 . @Vishwanatha-HD Could you first revert the 
change to `hash_join.cc` then rebase main to see if the hash join test is 
passing on big-endian? Thanks.



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