Andrew, This has grown out of https://lists.apache.org/thread/5jyhzkwyrjk9z52g0b49g31ygnz73gxo
In short, having just come off a bruising decade of confusion about what exactly constituted "Parquet V2", there was a desire to improve Parquet in a way that would not sow further confusion. So V3 was chosen for want of something better. There never has been a formal V2, simply the version number on the thrift IDL was bumped from 1 to 2 with the addition of new encodings (RLE_DICTIONARY and the delta encodings) and the V2 page header. Subsequent revisions have retained the major version 2. Cheers, Ed On 2026/04/01 21:46:50 Andrew Bell wrote: > On Wed, Apr 1, 2026 at 5:10 PM Will Edwards via dev > <[email protected]> wrote: > > > > Hi Ed, Alkis, Raphael, and all, > > > > Ed, I just saw your reply come in while I was drafting this, and I > > completely agree! I would absolutely love to collaborate with you on > > merging our PoCs and drafting a formal proposal for the jump table. I also > > agree that the deeper PAR3/FlatBuffer architectural discussion is best > > continued separately. > > Discussion of PAR3 (this is version 3, I suppose?) makes me wonder if > is there a version 2 (PAR2)? I don't see anything in the mailing list > history or in the parquet-format specification. > > Thanks, > > -- > Andrew Bell > [email protected] >
