Module expr_rewriter

Expression rewriter

Structs

NamePreserver

Handles ensuring the name of rewritten expressions is not changed.

Enums

SavedName

If the qualified name of an expression is remembered, it will be preserved when rewriting the expression

Traits

FunctionRewrite

Trait for rewriting Exprs into function calls.

Functions

coerce_plan_expr_for_schema

Returns plan with expressions coerced to types compatible with schema types

create_col_from_scalar_expr

Create a Column from the Scalar Expr

normalize_col

Recursively call LogicalPlanBuilder::normalize on all Column expressions in the expr expression tree.

normalize_col_with_schemas_and_ambiguity_check

See Column::normalize_with_schemas_and_ambiguity_check for usage

normalize_cols

Recursively normalize all Column expressions in a list of expression trees

normalize_sorts

replace_col

Recursively replace all Column expressions in a given expression tree with Column expressions provided by the hash map argument.

rewrite_sort_cols_by_aggs

Rewrite sort on aggregate expressions to sort on the column of aggregate output For example, max(x) is written to col("max(x)")

strip_outer_reference

Recursively remove all the [‘OuterReferenceColumn’] and return the inside Column in the expression tree.

unalias

Recursively un-alias an expressions

unnormalize_col

Recursively ‘unnormalize’ (remove all qualifiers) from an expression tree.

unnormalize_cols

Recursively un-normalize all Column expressions in a list of expression trees