Module transform::nonnullable [−][src]
Expand description
Harvests information about non-nullability of columns from sources.
This transformation can simplify logic when columns are known to be non-nullable. Predicates that tests for null can be elided, and aggregations can be simplified.
Structs
Harvests information about non-nullability of columns from sources.
Functions
Transformations to aggregation functions, based on nonnullability of columns.
True if the expression contains a “is null” test.
Transformations to scalar functions, based on nonnullability of columns.