OVERLAPS Example 7 - Teradata Vantage

Consider the following table and query:

CREATE TABLE project
   (id INTEGER,
    analysis_phase PERIOD(DATE))
UNIQUE PRIMARY INDEX (id);
INSERT project (1, PERIOD(DATE'2010-06-21',DATE'2010-06-25'));
SELECT 'OVERLAPS'
FROM project
WHERE analysis_phase OVERLAPS 
      PERIOD(DATE'2010-06-24',NULL);

The SELECT statement returns an error because one of the operands of OVERLAP is a Period type with a Period expression specifying an explicit NULL.