In my understanding below row value constructors(I hope this term is
correct) exaples should return true, but PostgreSQL does not.

test=# select (1,0) > (0,0);
 ?column? 
----------
 f
(1 row)

test=# select (0,1) > (0,0);
 ?column? 
----------
 f
(1 row)

In my understanding, (a,b) > (c,d) is equal to:

 a > c or (a = c and b > d)
--
Tatsuo Ishii

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