def to_array(self) -> ir.ColumnExpr:
"""View a single column table as an array.
Returns
-------
ValueExpr
A single column view of a table
"""
from .. import operations as ops
schema = self.schema()
if len(schema) != 1:
raise com.ExpressionError(
'Table must have exactly one column when viewed as array'
)
return ops.TableArrayView(self).to_expr()
def _table_to_array(self):
"""
Single column tables can be viewed as arrays.
"""
op = _ops.TableArrayView(self)
return op.to_expr()