Release arrow-rs / parquet Major version `60.0.0` (August 2026)

[alamb]

Let's keep the code flowing. Part of

• [EPIC] A collection of release tickets #7392

Release Checklist:

• Verify with downstream DataFusion tests:
• Release notes and bump version:
• Release Candidate + Vote thread:
• Release to crates.io / approval:
• Update permissions on new arrow-cmp crate
• Create follow on tickets

Required items for release

• None yet

Requested items for release

• Implement PARQUET-2249: Introduce IEEE 754 total order #9619 from @etseidl
• chore(deps): bump rand from 0.9.5 to 0.10.2 #10562
• Soundness: Out-of-bounds read in MutableBuffer::push via misbehaving ToByteSlice #10252 from @alamb
• chore: bump object_store to 0.14.1 #10375
• Use Metadata struct instead of HashMap<String, String> for metadata: Ordered; cheap to clone #10075 from @emilk
• Consider bumping msrv from 1.85 #10226 from @Jefffrey
  • Bump MSRV to 1.88 #10254
• remove the typo'd alias from fix: Rename parquet feature flag 'flate2-rust_backened' to 'flate2-rust_backend' #10239
• remove flight-sql-experimental feature from arrow-flight #10276
  • Remove flight-sql-experimental feature from arrow-flight #10335
• reapply chore: formalize the default map field names to match default arrow spec #10297 as a breaking change
  • reference Revert "chore: formalize the default map field names to match default arrow spec (#10297)" #10506
  • reapply PR: formalize the default map field names to match default arrow spec #10517
• Optimize PLAIN parquet string column to dictionary array #10614 from @Rich-T-kid (with breaking change)
• [Parquet] Add row group distinct counts to StatisticsConverter #10652 from @Rich-T-kid

[etseidl]

Reminder to include

• Implement PARQUET-2249: Introduce IEEE 754 total order #9619

[Jefffrey]

consider including

• chore(deps): bump rand from 0.9.5 to 0.10.2 #10192

as part of this release

[Jefffrey]

something to also consider:

• Consider bumping msrv from 1.85 #10226

[Jefffrey]

• would be good if we could get Remove dict_id from arrow_schema::field::Field and make dictionary IDs an internal implementation detail of flight encoding/decoding #5981 and Dictionary IDs Arrow IPC #1206 in this release

edit: this looks to require more work before can actually remove the deprecations, so not sure if can target for this release

[alamb]

I am in the final phases of making the 59.2.0 release

• Release arrow-rs / parquet Minor version 59.2.0 (July 2026) #9879

Then I think we should open up main and start preparing the 60.0.0 release ASAP as we already have quite a few changes queued up

[alamb]

FWIW i have made the 59.2.0 release candidate so from my perspective we can start merging PRs now that target 60 (and have breaking API changes)

I wonder if we should make an upgrade guide for arrow too?

[etseidl]

FWIW i have made the 59.2.0 release candidate so from my perspective we can start merging PRs now that target 60 (and have breaking API changes)

Yay. I'll start breaking things right now 😄