duro::expr expression txId
Evaluates the expression expression and returns the result.
If the expression is tuple-valued, the return value is a list containing pairs of elements. The first element in each pair is the attribute name and the second element of each pair is the attribute value.
If the expression is relation-valued, the return value is a list of tuples. Each tuple is represented as described above.
If the type of the expression is a user-defined type, the return value is a list which represents a possible representation. The list contains the name of the representation followed by pairs of elements. The first element in the nth pair is the component name and the second element of each pair is the component value.
$Id$