Reference a column of the dataset.
Stores only the field’s name. Type and other information is known only when the expression is bound to a dataset having an explicit scheme.
Nested references are allowed by passing multiple names or a tuple of names. For example
('foo', 'bar')references the field named “bar” inside the field named “foo”.
>>> import pyarrow.compute as pc >>> pc.field("a") <pyarrow.compute.Expression a> >>> pc.field(1) <pyarrow.compute.Expression FieldPath(1)> >>> pc.field(("a", "b")) <pyarrow.compute.Expression FieldRef.Nested(FieldRef.Name(a) ... >>> pc.field("a", "b") <pyarrow.compute.Expression FieldRef.Nested(FieldRef.Name(a) ...