Module polars_lazy::dsl [−][src]
Expand description
Domain specific language for the Lazy api.
Re-exports
pub use crate::frame::IntoLazy; |
Structs
NoEq | Wrapper type that indicates that the inner type is not equal to anything |
Null | The literal Null |
When | Intermediate state of |
WhenThen | Intermediate state of |
WhenThenThen | Intermediate state of chain when then exprs. |
Enums
AggExpr | |
Expr | Queries consists of multiple expressions. |
Operator |
Traits
BinaryUdfOutputField | |
Literal | |
Range | |
SeriesBinaryUdf | A wrapper trait for any binary closure |
SeriesUdf | A wrapper trait for any closure |
Functions
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 |
map_binary | Apply a closure on the two columns that are evaluated from |
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 |