mapleFU commented on PR #43995: URL: https://github.com/apache/arrow/pull/43995#issuecomment-2334631531
https://github.com/apache/parquet-format/blob/master/LogicalTypes.md#lists Without legacy: > The element field encodes the list's element type and repetition. Element repetition must be required or optional. With backward capability: Some existing data does not include the inner element layer. For backward-compatibility, the type of elements in LIST-annotated structures 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. 4. Otherwise, the repeated field's type is the element type with the repeated field's repetition. So, seems this hit the (1)? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
