Thanks! So, in the nested object scenario, would the metadata be field 0: "a", field 1: "a" or just field 0: "a" do the both way is ok for reader/writer, or we need limit the metadata implementation?
Best, Xuwei Fu Ryan Blue <[email protected]> 于2025年5月13日周二 04:05写道： > Keys may appear in nested objects, but cannot appear in the same object. So > the first example, {"a": {"a": 1}} is allowed. The second example, {"a": 1, > "a": 2} is not allowed. > > Ryan > > On Sun, May 11, 2025 at 11:47 PM wish maple <[email protected]> > wrote: > > > In the Parquet variant spec, metadata part says that > > > > > Object: An unordered collection of string/Variant pairs (i.e. key/value > > pairs). An object may not contain duplicate keys. [1] > > > > Considering a nested json object like {"a": {"a": 1}}, would the metadata > > like field 0: "a", field 1: "a" or just field 0: "a" , or both of them is > > ok for reader/writer? > > > > And besides, would duplicate keys be allowed in the same object? Like > {"a": > > 1, "a": 2}? > > > > Best, Xuwei Fu > > > > [1] > > https://github.com/apache/parquet-format/blob/master/VariantEncoding.md > > >
