HyukjinKwon commented on code in PR #46737:
URL: https://github.com/apache/spark/pull/46737#discussion_r1670275284
##########
python/pyspark/sql/types.py:
##########
@@ -747,8 +747,8 @@ def jsonValue(self) -> Dict[str, Any]:
def fromJson(
cls,
json: Dict[str, Any],
- fieldPath: str,
- collationsMap: Optional[Dict[str, str]],
+ fieldPath: str = "",
+ collationsMap: Optional[Dict[str, str]] = None,
) -> "ArrayType":
elementType = _parse_datatype_json_value(
json["elementType"], fieldPath + ".element", collationsMap
Review Comment:
I feel like it has to be `{"element": collation}` and `{"key": collation}`.
`.element` sounds a bit awkward. While I am fine because this JSON format is
supposed to be internal-only, is this backward compatible? E.g., can old JSON
data types be read? I have seen many tickets related to this, e.g.,
https://github.com/apache/spark/pull/43474
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