Module pushdown 

Pushdown negotiation traits — Spark DSv2 / Trino-style marker traits.

Storage backends, index handles, catalog tables, and operator providers may additionally implement any subset of these traits to negotiate filter / projection / limit / topN / aggregate pushdown with the planner. Marker traits per capability let backends opt in to only what they can handle.

Structs

AggregateApplication

Result of consulting an aggregate-pushdown source.

FilterApplication

Result of consulting a filter-pushdown source.

ProjectionApplication

Result of consulting a projection-pushdown source.

SortExpr

A sort expression for topN pushdown.

TopNApplication

Result of consulting a TopN-pushdown source.

Enums

TopNScope

Scope at which a TopN pushdown was applied.

Traits

SupportsAggregatePushdown

Marker trait: source supports aggregate pushdown.

SupportsFilterPushdown

Marker trait: source supports filter pushdown.

SupportsLimitPushdown

Marker trait: source supports limit pushdown.

SupportsProjectionPushdown

Marker trait: source supports projection pushdown.

SupportsTopNPushdown

Marker trait: source supports topN (sort + limit) pushdown.