Configure optimization toggles

Description

Configure the optimization toggles for the lazy query

Usage

<LazyFrame>$set_optimization_toggle(
  type_coercion = TRUE,
  predicate_pushdown = TRUE,
  projection_pushdown = TRUE,
  simplify_expression = TRUE,
  slice_pushdown = TRUE,
  comm_subplan_elim = TRUE,
  comm_subexpr_elim = TRUE,
  streaming = FALSE,
  eager = FALSE
)

Arguments

`type_coercion`	Logical. Coerce types such that operations succeed and run on minimal required memory.
`predicate_pushdown`	Logical. Applies filters as early as possible at scan level.
`projection_pushdown`	Logical. Select only the columns that are needed at the scan level.
`simplify_expression`	Logical. Various optimizations, such as constant folding and replacing expensive operations with faster alternatives.
`slice_pushdown`	Logical. Only load the required slice from the scan level. Don’t materialize sliced outputs (e.g. `join$head(10)`).
`comm_subplan_elim`	Logical. Will try to cache branching subplans that occur on self-joins or unions.
`comm_subexpr_elim`	Logical. Common subexpressions will be cached and reused.
`streaming`	Logical. Run parts of the query in a streaming fashion (this is in an alpha state).
`eager`	Logical. Run the query eagerly.

Value

LazyFrame with specified optimization toggles

Examples

library(polars)

pl$LazyFrame(mtcars)$set_optimization_toggle(type_coercion = FALSE)

#> $ok
#> polars LazyFrame
#>  $describe_optimized_plan() : Show the optimized query plan.
#> 
#> Naive plan:
#> DF ["mpg", "cyl", "disp", "hp"]; PROJECT */11 COLUMNS; SELECTION: "None"
#> 
#> $err
#> NULL
#> 
#> attr(,"class")
#> [1] "extendr_result"