ZhangHuiGui commented on code in PR #40223:
URL: https://github.com/apache/arrow/pull/40223#discussion_r1503534279
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cpp/src/arrow/compute/expression.cc:
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@@ -536,14 +566,21 @@ Result<Expression> BindNonRecursive(Expression::Call
call, bool insert_implicit_
std::vector<TypeHolder> types = GetTypes(call.arguments);
ARROW_ASSIGN_OR_RAISE(call.function, GetFunction(call, exec_context));
- // First try and bind exactly
- Result<const Kernel*> maybe_exact_match =
call.function->DispatchExact(types);
- if (maybe_exact_match.ok()) {
- call.kernel = *maybe_exact_match;
- } else {
- if (!insert_implicit_casts) {
- return maybe_exact_match.status();
+ bool maybe_need_dispatch_best = IsNeedDispatchBest(types,
call.function_name);
Review Comment:
Yes, i have thought the changes here, it's much clear.
But in fact, this is indeed a special case. The calculation operation of
decimal type must enter DispatchBest before it can be cast implicitly :(.
Changes here only return a invalid status.
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