Module expr 

Expression DSL used by both eager and lazy APIs.

Structs

DatetimeExpr

Expression AST and supporting enums. Builder for dt.* expression functions.

ListExpr

Expression AST and supporting enums. Builder for list.* expression functions.

StringExpr

Expression AST and supporting enums. Builder for str.* expression functions.

Enums

AggFunc

Expression AST and supporting enums. Supported aggregation functions.

ConcatStrNullBehavior

Expression AST and supporting enums. Null treatment for Expr::ConcatStr.

DatetimeFunction

Expression AST and supporting enums. Supported dt.* functions.

Expr

Expression AST and supporting enums. Expression AST used by DataFrame and LazyFrame.

ExprFunction

Expression AST and supporting enums. Supported namespace expression functions.

ListFunction

Expression AST and supporting enums. Supported list.* functions.

Operator

Expression AST and supporting enums. Supported binary operators.

Scalar

Expression AST and supporting enums. Scalar literal values.

StringFunction

Expression AST and supporting enums. Supported str.* functions.

UnaryOperator

Expression AST and supporting enums. Supported unary operators.

Functions

all

Expression builder helpers. Create a wildcard expression that expands to all columns in projections.

col

Expression builder helpers. Create an expression that refers to a column by name (case-sensitive).

concat_str

Expression AST and supporting enums. Construct a concat_str expression from two or more UTF-8 expressions.

lit

Expression builder helpers. Create a literal expression from a scalar value.