ray.data.expressions.StarExpr

class ray.data.expressions.StarExpr

Bases: Expr

Expression that represents all columns from the input.

This is a special expression used in projections to indicate that all existing columns should be preserved at this position in the output. It’s typically used internally by operations like with_column() and rename_columns() to maintain existing columns.

Example

When with_column(“new_col”, expr) is called, it creates: Project(exprs=[star(), expr.alias(“new_col”)])

This means: keep all existing columns, then add/overwrite “new_col”

DeveloperAPI: This API may change across minor Ray releases.

Methods

abs	Compute the absolute value of the expression.
acos	Compute the arccosine (inverse cosine) of the expression, returning radians.
alias	Rename the expression.
asin	Compute the arcsine (inverse sine) of the expression, returning radians.
atan	Compute the arctangent (inverse tangent) of the expression, returning radians.
ceil	Round values up to the nearest integer.
cos	Compute the cosine of the expression (in radians).
exp	Compute the natural exponential of the expression.
floor	Round values down to the nearest integer.
is_in	Check if the expression value is in a list of values.
is_not_null	Check if the expression value is not null.
is_null	Check if the expression value is null.
ln	Compute the natural logarithm of the expression.
log10	Compute the base-10 logarithm of the expression.
log2	Compute the base-2 logarithm of the expression.
negate	Compute the negation of the expression.
not_in	Check if the expression value is not in a list of values.
power	Raise the expression to the given power.
round	Round values to the nearest integer using PyArrow semantics.
sign	Compute the sign of the expression.
sin	Compute the sine of the expression (in radians).
tan	Compute the tangent of the expression (in radians).
to_pyarrow	Convert this Ray Data expression to a PyArrow compute expression.
trunc	Truncate fractional values toward zero.

Attributes

arr	Access array operations for this expression.
dt	Access datetime operations for this expression.
list	Access list operations for this expression.
name	Get the name associated with this expression.
str	Access string operations for this expression.
struct	Access struct operations for this expression.
data_type