Issues

• ExtensionRegistry fails to load default extensions when files() returns a MultiplexedPath

  substrait-io/substrait-python#284 · Filter by author thgschwind opened on Oct 1, 2026

• builders.plan.aggregate accepts a grouping expression that no grouping set references

  substrait-io/substrait-python#282 · Filter by author nielspardon opened on Sep 28, 2026

• builders.plan.aggregate omits the grouping-set-id column from RelRoot.names, so a plan with more than one grouping set is invalid

  substrait-io/substrait-python#281 · Filter by author nielspardon opened on Sep 28, 2026

• Update to Substrait v0.104.0

  substrait-io/substrait-python#280 · Filter by author substrait-project-bot opened on Sep 27, 2026

• infer_expression_type takes IfThen and SwitchExpression nullability from the first branch only

  substrait-io/substrait-python#277 · Filter by author nielspardon opened on Sep 22, 2026

• infer_rel_schema raises AttributeError on an unbound column: the nullability helpers assume every Type.kind has a nullability field

  substrait-io/substrait-python#276 · Filter by author nielspardon opened on Sep 22, 2026

• builders.plan.join and the physical equi-joins omit subtrees=, so a post_join_filter over a cached input raises

  substrait-io/substrait-python#275 · Filter by author nielspardon opened on Sep 22, 2026

• PlanPrinter mislabels field references when the schema has a nested field

  substrait-io/substrait-python#274 · Filter by author nielspardon opened on Sep 22, 2026

• Update to Substrait v0.103.1

  substrait-io/substrait-python#273 · Filter by author substrait-project-bot opened on Sep 20, 2026

• infer_rel_schema takes an Expand switching field's nullability from the first duplicate

  substrait-io/substrait-python#269 · Filter by author alexandrefimov opened on Sep 8, 2026

• narwhals_example.py fails on main: narwhals layer passes a YAML filename where a URN is expected

  substrait-io/substrait-python#262 · Filter by author nielspardon opened on Sep 2, 2026

• Un-aliased aggregate measures are all named IfThen(<operand>)

  substrait-io/substrait-python#261 · Filter by author nielspardon opened on Sep 2, 2026

• Update to Substrait v0.103.0

  substrait-io/substrait-python#256 · Filter by author substrait-project-bot opened on Aug 30, 2026

• Update to Substrait v0.102.0

  substrait-io/substrait-python#255 · Filter by author substrait-project-bot opened on Aug 23, 2026

• Update to Substrait v0.101.0

  substrait-io/substrait-python#253 · Filter by author substrait-project-bot opened on Aug 16, 2026

• Update to Substrait v0.100.0

  substrait-io/substrait-python#249 · Filter by author substrait-project-bot opened on Aug 9, 2026

• Customizing extension support across relations, expressions and types

  substrait-io/substrait-python#247 · Filter by author nielspardon opened on Aug 5, 2026

• Epic: consume Substrait spec test-case (.test) files — parse, map, and run conformance cases

  enhancement
  substrait-io/substrait-python#213 · Filter by author nielspardon opened on Jul 13, 2026

• Native DataFrame: revisit lazy vs. eager evaluation for eager error reporting

  substrait-io/substrait-python#212 · Filter by author nielspardon opened on Jul 13, 2026