Module query 

Query structure types: projections, sort keys, aggregates, windows, engine/join/spatial enums.

Structs

AggregateExpr

Aggregate expression: COUNT(*), SUM(amount), etc.

SortKey

Sort key for ORDER BY.

WindowSpec

Window function specification.

Enums

EngineType

Database engine type for a collection.

JoinType

SQL join type.

Projection

Projection item in SELECT.

SpatialPredicate

Spatial predicate types.