rasql - results for and,or,xor are not displayed properly

[Bang Pham Huu]

This works to display f:

rasql -q 'select false' --out string
Query result collection has 1 element(s):
  Result element 1: f

This doesn't show f:

rasql -q 'select <[0:0] true> and <[0:0] false>' --out string
Query result collection has 1 element(s):
  Result object 1: 
rasql done.

This doesn't show t:

rasql -q 'select <[0:0] true> or <[0:0] true>' --out string
Query result collection has 1 element(s):
  Result object 1: