equal: don't know whether nodes of type 600 are equal - Mailing list pgsql-hackers

regression=> SELECT 1 AS two UNION SELECT 2;
NOTICE:  equal: don't know whether nodes of type 600 are equal
two
--- 1 2
(2 rows)

gdb:

#0  equal (a=0x179f10, b=0x1c1490) at equalfuncs.c:746
#1  0x7bf4d in remove_duplicates (list=0x167d90) at prepqual.c:563
#2  0x7b86a in qual_cleanup (qual=0x168f50) at prepqual.c:234
#3  0x7b48e in cnfify (qual=0x168790, removeAndFlag=1 '\001') at prepqual.c:76
#4  0xba22a in Except_Intersect_Rewrite (parsetree=0x179f10)              ^^^^^^^^^^^^^^^^^^^^^^^^   at
rewriteHandler.c:2842

Vadim