westonpace commented on code in PR #13051:
URL: https://github.com/apache/arrow/pull/13051#discussion_r864097545
##########
cpp/src/arrow/compute/exec/hash_join_node.cc:
##########
@@ -453,6 +453,20 @@ Status
HashJoinSchema::CollectFilterColumns(std::vector<FieldRef>& left_filter,
return Status::OK();
}
+Status ValidateHashJoinNodeOptions(const HashJoinNodeOptions& join_options) {
+ if (join_options.key_cmp.size() < 1 || join_options.left_keys.size() < 1 ||
+ join_options.right_keys.size() < 1) {
+ return Status::Invalid("key_cmp and keys cannot be empty");
+ }
+
+ if ((join_options.key_cmp.size() != join_options.left_keys.size()) ||
+ (join_options.key_cmp.size() != join_options.right_keys.size()) {
+ return Status::Invalid("key_cmp and keys must have the same size");
+ }
Review Comment:
In addition, the left keys and right keys must have length equal to each
other. E.g. `left_keys.size() == right_keys.size()`
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