vibhatha commented on code in PR #36748:
URL: https://github.com/apache/arrow/pull/36748#discussion_r1273246214
##########
python/pyarrow/table.pxi:
##########
@@ -5307,8 +5307,14 @@ list[tuple(str, str, FunctionOptions)]
# Ensure aggregate function is hash_ if needed
if len(self.keys) > 0 and not func.startswith("hash_"):
func = "hash_" + func
+ import pyarrow.compute as pc
if len(self.keys) == 0 and func.startswith("hash_"):
- func = func[5:]
+ scalar_func = func[5:]
+ try:
+ pc.get_function(scalar_func)
+ func = scalar_func
+ except:
+ pass
Review Comment:
This would show an error message as shown below
```bash
E pyarrow.lib.ArrowInvalid: The provided function (hash_list) is a hash
aggregate function. Since there are no keys to group by, a scalar aggregate
function was expected (normally these do not start with hash_)
E
/Users/vibhatha/github/fork/arrow/cpp/src/arrow/acero/scalar_aggregate_node.cc:186
MakeAggregateNodeArgs(input_schema, keys, segment_keys, aggregates, exec_ctx,
concurrency, is_cpu_parallel)
E /Users/vibhatha/github/fork/arrow/cpp/src/arrow/acero/exec_plan.cc:587
MakeExecNode(this->factory_name, plan, std::move(inputs), *this->options,
registry)
E /Users/vibhatha/github/fork/arrow/cpp/src/arrow/acero/exec_plan.cc:582
std::get<Declaration>(input).AddToPlan(plan, registry)
E /Users/vibhatha/github/fork/arrow/cpp/src/arrow/acero/exec_plan.cc:660
with_sink.AddToPlan(exec_plan.get())
```
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