Aggregate all the columns used in csv scans and make sure that all columns are scanned in one go. Due to self joins there can be multiple Scans of the same file in a LP. We already cache the scans in the PhysicalPlan, but we need to make sure that the first scan has all the columns needed.

The literal Null

OptState

State of the allowed optimizations

PredicatePushDown

Optimizer that uses a stack and memory arenas in favor of recursion

TypeCoercionRule

Enums

AAggExpr

AExpr

ALogicalPlan

ALogicalPlan is a representation of LogicalPlan with Nodes which are allocated in an Arena

Constants

NULL

Traits

Functions

collect_fingerprints

find_column_union_and_fingerprints

Find the union between the columns per unique IO operation. A unique IO operation is the file + the predicates pushed down to that file

lit

Create a Literal Expression from L

node_to_expr

converts a node from the AExpr arena to Expr

node_to_lp

converts a node from the ALogicalPlan arena to a LogicalPlan

optimize

to_aexpr

converts expression to AExpr and adds it to the arena, which uses an arena (Vec) for allocation

to_alp

converts LogicalPlan to ALogicalPlan it adds expressions & lps to the respective arenas as it traverses the plan finally it returns the top node of the logical plan

Type Definitions

AllowedOptimizations

Module polars_plan::logical_plan

Structs

Enums

Constants

Traits

Functions

Type Definitions