Module datafusion::physical_plan::expressions

Defines physical expressions that can evaluated at runtime during query execution

Structs

Avg	AVG aggregate expression
BinaryExpr	Binary expression
CaseExpr	The CASE expression is similar to a series of nested if/else and there are two forms that can be used. The first form consists of a series of boolean "when" expressions with corresponding "then" expressions, and an optional "else" expression.
CastExpr	CAST expression casts an expression to a specific data type
Column	Represents the column at a given index in a RecordBatch
Count	COUNT aggregate expression Returns the amount of non-null values of the given expression.
InListExpr	InList
IsNotNullExpr	IS NULL expression
IsNullExpr	IS NULL expression
Literal	Represents a non-null literal value
Max	MAX aggregate expression
Min	MIN aggregate expression
NegativeExpr	Negative expression
NotExpr	Not expression
PhysicalSortExpr	Represents Sort operation for a column in a RecordBatch
Sum	SUM aggregate expression

Statics

SUPPORTED_NULLIF_TYPES

Currently supported types by the nullif function. The order of these types correspond to the order on which coercion applies This should thus be from least informative to most informative

Functions

avg_return_type	function return type of an average
binary	Create a binary expression whose arguments are correctly coerced. This function errors if it is not possible to coerce the arguments to computational types supported by the operator.
binary_operator_data_type	Returns the return type of a binary operator or an error when the binary operator cannot perform the computation between the argument's types, even after type coercion.
case	Create a CASE expression
cast	Return a PhysicalExpression representing expr casted to cast_type, if any casting is needed.
col	Create a column expression
format_state_name	returns the name of the state
in_list	Creates a unary expression InList
is_not_null	Create an IS NOT NULL expression
is_null	Create an IS NULL expression
is_numeric	Determine if a DataType is numeric or not
is_signed_numeric	Determine if a DataType is signed numeric or not
lit	Create a literal expression
negative	Creates a unary expression NEGATIVE
not	Creates a unary expression NOT
nullif_func	Implements NULLIF(expr1, expr2) Args: 0 - left expr is any array 1 - if the left is equal to this expr2, then the result is NULL, otherwise left value is passed.
numerical_coercion	Coercion rule for numerical types: The type that both lhs and rhs can be casted to for numerical calculation, while maintaining maximum precision
sum_return_type	function return type of a sum