Module transform 

Transformations for crate::expr::Expression and crate::expr::BoundExpression trees.

Structs

BoundPartitionedExpr

The result of partitioning a bound expression.

PartitionedExpr

The result of partitioning an expression.

Functions

coerce_expression

Rewrite an expression tree to insert casts where a scalar function’s coerce_args demands a different type than what the child currently produces.

partition

Partition an expression into sub-expressions that are uniquely associated with an annotation. A root expression is also returned that can be used to recombine the results of the partitions into the result of the original expression.

partition_annotations

partition_bound

Partition an expression into sub-expressions that are uniquely associated with an annotation. A root expression is also returned that can be used to recombine the results of the partitions into the result of the original expression.

partition_bound_annotations

Partition an already-annotated bound expression tree.

replace

Replaces all occurrences of needle in the expression expr with replacement.

replace_root_fields

Expand the root expression with a pack of the given struct fields.