Andrew Lamb Weekly-ish Open Source plan - 2026-01-19

[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)

• Improve DataFusion ClickBench performance (via pushdown predicates): Enable parquet filter pushdown (filter_pushdown) by default #3463
• Support "pre-image" for pruning predicate evaluation #18320 with @sdf-jkl
• Make push_batch_with_filter up to 3x faster arrow-rs#8951 with @Dandandan
• Speeding up planning with @askalt Avoid recomputing PlanProperties redundently #19796
• Struct field pushdown with @adriangb : Allow struct field access projections to be pushed down into scans #19538
• Help push along ALP in Parquet: GH-48701: [C++][Parquet] Add ALPpd encoding arrow#48345 (and related tickets)
• new pruning logic with @2010YOUY01 feat: Prune complex/nested predicates via statistics propagation #19609

Tickets I am actively working on

• Release object store 0.13.1 (maintenance) - Target Jan 2026 arrow-rs-object-store#598
• Release object store 0.12.5 (maintenance) - Target Dec 2025 arrow-rs-object-store#582
• Release DataFusion 52.1.0 or 52.0.1 (minor/patch) Release (Jan 2026) #19784
• Blog post for the DataFusion 52.0.0 release #19691
• Reduce overhead to create an Array from ArrayData (make_array) arrow-rs#9061
• [Parquet] Remove uses of ArrayData in favor of Direct Array construction arrow-rs#9128

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

PR review queue (rough order)

• TODO