Andrew Lamb Weekly-ish Open Source plan - 2026-02-01

[alamb]

This is my weekly plan, mostly for my own organizational need. I am making it public in the hopes that helps others to see what I am working on -- also I spend so much time in github the interface is very familiar to me and I can cross link all the issues I am working

Projects I am supporting actively (in priority order)

• [EPIC] Make DataFusion the top of the ClickBench Parquet leaderboard #18489 (means various performance things with @Dandandan across repos)
• [EPIC] Simplify datetime predicates using "preimages" #19946 with @sdf-jkl and @drin
• subquery help for CMU: feat: Support planning subqueries with OuterReferenceColumn belongs to non-adjacent outer relations  #19930
• Planning speed improvements with @askalt Avoid recomputing PlanProperties redundently #19796
• Struct field pushdown with @adriangb : Allow struct field access projections to be pushed down into scans #19538
• New pruning logic with @2010YOUY01 feat: Prune complex/nested predicates via statistics propagation #19609
• Improve DataFusion ClickBench performance (via pushdown predicates): Enable parquet filter pushdown (filter_pushdown) by default #3463
• Help push along ALP in Parquet: GH-48701: [C++][Parquet] Add ALPpd encoding arrow#48345 (and related tickets)

Tickets I am actively working on

• Release arrow-rs / parquet Minor version 57.3.0 (January 2026) arrow-rs#9240

Notes to myself: a duplicate entry unchecked means I need to go back and re-review

PR review queue (rough order)

• TODO