ray.data.expressions.StarExpr#

class ray.data.expressions.StarExpr[source]#

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

`alias`	Rename the expression.
`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.
`not_in`	Check if the expression value is not in a list of values.
`to_pyarrow`	Convert this Ray Data expression to a PyArrow compute expression.

Attributes

`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`