wgtmac commented on code in PR #466:
URL: https://github.com/apache/parquet-format/pull/466#discussion_r1823727500
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LogicalTypes.md:
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@@ -655,10 +655,12 @@ should always be determined by the following rules:
1. If the repeated field is not a group, then its type is the element type and
elements are required.
2. If the repeated field is a group with multiple fields, then its type is the
- element type and elements are required.
-3. If the repeated field is a group with one field and is named either `array`
- or uses the `LIST`-annotated group's name with `_tuple` appended then the
- repeated type is the element type and elements are required.
+ element type and elements are required. In this case, the element type is
+ a Struct type with multiple fields.
+3. If the repeated field is a group (without annotation) with one `required` or
Review Comment:
> To point to the fact that for backwards compatibility it can also be
repeated.
The original statement is all about the formal three-level encoding. Adding
`repeated` to it may further confuse readers. That's why I tried to clarify
this in the backward compatibility section.
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