Hash join cannot match records using some TIME ZONE / DECFLOAT keys
-------------------------------------------------------------------
Key: CORE-6534
URL: http://tracker.firebirdsql.org/browse/CORE-6534
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 4.0 RC 1, 4.0 Beta 2
Reporter: Dmitry Yemanov
Test case:
select 1 from rdb$database where timestamp '01.01.2021 13:00:00 +03:00' =
timestamp '01.01.2021 12:00:00 +02:00';
-- Values are surely equal:
CONSTANT
============
1
select 1 from (select timestamp '01.01.2021 13:00:00 +03:00' as ts from
rdb$database) natural join (select timestamp '01.01.2021 12:00:00 +02:00' as ts
from rdb$database);
-- OOPS! No record is returned!
select 1 from rdb$database where cast(10 as decfloat) = cast(10.000 as
decfloat);
-- Values are surely equal:
CONSTANT
============
1
select 1 from (select cast(10 as decfloat) as df from rdb$database) natural
join (select cast(10.000 as decfloat) as df from rdb$database);
-- OOPS! No record is returned!
select 1 from rdb$database where cast('+0' as decfloat) = cast('-0' as
decfloat);
-- Values are surely equal:
CONSTANT
============
1
select 1 from (select cast('+0' as decfloat) as df from rdb$database) natural
join (select cast('-0' as decfloat) as df from rdb$database);
-- OOPS! No record is returned!
And also another case with approximate zeros (similar to CORE-3547):
select 1 from rdb$database where cast('+0' as float) = cast('-0' as float);
-- Values are surely equal:
CONSTANT
============
1
select 1 from (select cast('+0' as float) as f from rdb$database) natural join
(select cast('-0' as float) as f from rdb$database);
-- OOPS! No record is returned!
select 1 from rdb$database where cast('+0' as double precision) = cast('-0' as
double precision);
-- Values are surely equal:
CONSTANT
============
1
select 1 from (select cast('+0' as double precision) as d from rdb$database)
natural join (select cast('-0' as double precision) as d from rdb$database);
-- OOPS! No record is returned!
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://tracker.firebirdsql.org/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
Firebird-Devel mailing list, web interface at
https://lists.sourceforge.net/lists/listinfo/firebird-devel
