Module mz_transform::nonnullable

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

• NonNullable
  Harvests information about non-nullability of columns from sources.

Functions

• aggregate_nonnullable 🔒
  Transformations to aggregation functions, based on nonnullability of columns.
• scalar_contains_isnull 🔒
  True if the expression contains a “is null” test.
• scalar_nonnullable 🔒
  Transformations to scalar functions, based on nonnullability of columns.