Release DataFusion 52.5.0 (minor/) Release (Apr 2026)

[alamb]

Is your feature request related to a problem or challenge?

• Part of [EPIC] DataFusion Releases #19783
• Follow on to Release DataFusion 52.4.0 (minor/) Release (Mar 2026) #20855

I strongly suspect we'll end up with a few more bugs on the branch-52 release, so I am proactively opening a ticket to propose / track such a release

Steps:

• Update version and changelog:
• Voting Thread:
• Publish to crates.io

Potential Content:

Requested Bug Fixes. Format: Issue / Requester / Backport PR

• Incorrect ORDER BY in unparser after DF 52 upgrade #20905 / @alamb @krinart / TODO
• Filter pushdown past children with fetch limits causes correctness bug #21063 (cc @shivbhatia10)
  • Backport PR - [branch-52] Fix push_down_filter for children with non-empty fetch fields (#21057) #21141
• Substrait join consumer produces incorrect logical plan #21124 (cc @gabotechs)
  • Backport PR - [branch-52] Substrait join consumer should not merge nullability of join keys (#21121) #21161

[hareshkh]

@alamb : Can we add the following issues to this release please?

• Filter pushdown past children with fetch limits causes correctness bug #21063 (cc @shivbhatia10)
  • Backport PR - [branch-52] Fix push_down_filter for children with non-empty fetch fields (#21057) #21141
• Substrait join consumer produces incorrect logical plan #21124 (cc @gabotechs)
  • Backport PR - [branch-52] Substrait join consumer should not merge nullability of join keys (#21121) #21161

[alamb]

@alamb : Can we add the following issues to this release please?

Done -- thank you @hareshkh

[alamb]

I'll plan to make a RC next week hopefully