Indicate if this expression is a literal value (optionally aliased)

Source code

Description

Indicate if this expression is a literal value (optionally aliased)

Usage

<Expr>$meta$is_literal(..., allow_aliasing = FALSE)

Arguments

…	These dots are for future extensions and must be empty.
allow_aliasing	If FALSE (default), only a bare literal will match. Set to TRUE to also allow for aliased literals.

Value

A polars expression

Examples

library("polars")

e <- pl$lit(123)
e$meta$is_literal()

#> [1] TRUE

e <- pl$lit(123)$alias("foo")
e$meta$is_literal()

#> [1] FALSE

e$meta$is_literal(allow_aliasing = TRUE)

#> [1] TRUE