RussellSpitzer commented on code in PR #624:
URL: https://github.com/apache/parquet-format/pull/624#discussion_r4075349830
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src/main/thrift/parquet.thrift:
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@@ -314,6 +314,9 @@ struct Statistics {
* or DOUBLE, or logical type is FLOAT16.
* If this field is not present, readers MUST assume NaNs may be present
* (i.e. MUST assume nan_count > 0 and MAY NOT assume nan_count == 0).
+ * If the column is the element leaf of a VECTOR, whose elements MUST by
+ * convention always be finite (see LogicalTypes.md) nan_count MUST be
Review Comment:
I think Dan mentioned this below, but we can could probably just say
"readers may assume nan_count = 0" and not store it.
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