The following bug has been logged on the website:
Bug reference: 16425
Logged by: Michal C
Email address: c_michal@poczta.onet.pl
PostgreSQL version: 12.2
Operating system: Windows 10
Description:
Sorry for my English
My PG version: "PostgreSQL 12.2, compiled by Visual C++ build 1914,
64-bit"
Example for bag:
with d (a,b) as (values (null::varchar(255),1))
select *
from d d1
full join d d2 using (a,b);
Result:
"a" "b"
null 1
null 1
Why select returns 2 records, Is this correct?
