TableExpr

Find the innermost owner of the supplied column within this TableExpr

Is this TableRef an anoymous root

Is this TableExpr backed by an SQL union

This is used to determine whether or not non-nullable columns should be weakened to being nullable when fetched

The name of this TableExpr

Yields a copy of this TableExpr with all occurences of from replaced by to

Render a defining occurence of this TableExpr

Render a reference to this TableExpr

Is the supplied column an immediate component of this TableExpr?

The name, if any, of this ColumnOwner