Module polars_lazy::dsl[−][src]

Domain specific language for the Lazy api.

Re-exports

pub use crate::frame::IntoLazy;

NoEq	Wrapper type that indicates that the inner type is not equal to anything
Null	The literal Null
When
WhenThen

AggExpr
Expr	Queries consists of multiple expressions.
Operator

all_exprs	Evaluate all the expressions with a bitwise and
any_exprs	Evaluate all the expressions with a bitwise or
avg	Find the mean of all the values in this Expression.
binary_expr
cast	Cast expression.
col	Create a Column Expression based on a column name.
count	Count the number of values in this Expression.
except	Exclude a column from selection.
fold_exprs	Accumulate over multiple columns horizontally / row wise.
is_not_null	IsNotNull expression.
is_null	IsNull expression
lit	Create a Literal Expression from `L`
map_binary	Apply a closure on the two columns that are evaluated from `Expr` a and `Expr` b.
map_binary_lazy_field	Binary function where the output type is determined at runtime when the schema is known.
max	Find the maximum of all the values in this Expression.
max_exprs	Get the the minimum value per row
mean	Find the mean of all the values in this Expression.
median	Find the median of all the values in this Expression.
min	Find the minimum of all the values in this Expression.
min_exprs	Get the the minimum value per row
not	Not expression.
quantile	Find a specific quantile of all the values in this Expression.
range	Create a range literal.
sum	Sum all the values in this Expression.
sum_exprs	Get the the sum of the values per row
ternary_expr
when	Start a when-then-otherwise expression