I think there might be an another approach; by making it possible to define
safetiness of an operator - going back to the first example and considering:
SELECT e.name
FROM emp e
INNER JOIN dep d ON e.deptno = d.deptno
WHERE (10 / e.empno) = 1
and the pushed down version:
SELECT e.name
FROM
Thanks for logging this. I agree that it’s not high priority. I added some
commentary about related bugs.
> On Oct 7, 2022, at 9:07 AM, Stamatis Zampetakis wrote:
>
> I just logged https://issues.apache.org/jira/browse/CALCITE-5315 but I am
> not planning to work on this sometime soon.
>
>
I just logged https://issues.apache.org/jira/browse/CALCITE-5315 but I am
not planning to work on this sometime soon.
Best,
Stamatis
On Fri, Feb 18, 2022 at 10:56 PM Stamatis Zampetakis
wrote:
> Thank you all for the feedback.
>
> I will do a small research about the proper term to use for
Thank you all for the feedback.
I will do a small research about the proper term to use for functions that
might throw / never throw and log a JIRA to move the discussion further.
@Viliam : Note that the problem you mention, although similar, is not
exactly the same as the one I brought up now.
I have observed this issue years ago in well-known databases. My case was
much simpler:
data
recordType:int value:text
- --
0 1
1 a
SELECT *
FROM data
WHERE recordType='1' AND CAST(value AS INT)<10
SQL is declarative, and unlike procedural
You should definitely log a bug, even if there are no plans to fix it. It is a
violation of the standard, and therefore it is a bug, and therefore we should
document that it exists.
Can you do some research on the right terminology. You use the term ‘unsafe’. I
think the PL community uses the
Is it feasible to prevent the filter push down in cases like this ( detect
potential division by zero) ? What other exceptions that could happen?
Should it only push down some filters and preserve the complex filter above
the join?
Regarding a Jira ticket, generating an exception when it should
Hi all,
Till today, I believed that pushing a filter below an inner join is not
strictly related to the operators (equals, plus, minus, cast, division)
present in the filter.
However, the query below will return some results if the filter is executed
after the join or it will fail with an
