wgtmac commented on code in PR #43995:
URL: https://github.com/apache/arrow/pull/43995#discussion_r1824020918
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cpp/src/parquet/arrow/schema.cc:
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@@ -631,9 +633,12 @@ Status ListToSchemaField(const GroupNode& group, LevelInfo
current_levels,
if (group.field_count() != 1) {
return Status::Invalid("LIST-annotated groups must have a single child.");
}
- if (group.is_repeated()) {
- return Status::Invalid("LIST-annotated groups must not be repeated.");
- }
+
+ // The Parquet spec requires that LIST-annotated group cannot be repeated
when
+ // it applies normal three-level encoding. We need to figure out legacy list
+ // structures and do not enforce this rule for them.
+ bool is_legacy_list_structure = true;
Review Comment:
Now I have changed the repetition check for only non-legacy list.
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