mapleFU commented on code in PR #449:
URL: https://github.com/apache/parquet-format/pull/449#discussion_r1721341758
##########
src/main/thrift/parquet.thrift:
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@@ -257,7 +257,11 @@ struct Statistics {
*/
1: optional binary max;
2: optional binary min;
- /** count of null value in the column */
+ /**
+ * count of null value in the column
+ *
+ * Writers should write this field even if it is zero or in non-null
columns.
Review Comment:
> We might also add the expectation to the reader implementations?
I'd like to wait other replying the context in ML firstly
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