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Personally, I think a separate section would be preferable although it
could be formatted the same way as the news so it should be equally
easy to maintain. I think separating it would be nice because it's not
necessarily "news" and I don't think we want to suggest it's
authoritative.
--
Michael
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Justin Swett created CALCITE-3370:
-
Summary: Emulate NULL direction for MSSQL
Key: CALCITE-3370
URL: https://issues.apache.org/jira/browse/CALCITE-3370
Project: Calcite
Issue Type: Task
Julian Hyde created CALCITE-3369:
Summary: In LatticeSuggester, recommend lattices based on UNION
queries
Key: CALCITE-3369
URL: https://issues.apache.org/jira/browse/CALCITE-3369
Project: Calcite
Hi,
I agree with that and would love such a section (with timestamps). This could
also make it easier for newcomers to learn about calcite.
Julian
From: Julian Hyde
Sent: Tuesday, September 24, 2019 8:50:21 PM
To: dev
Subject: Re: Integrating Calcite, Omid,
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I like the idea of time-ordered articles. It creates less expectation the
articles are “definitive”.
How about using the “news” section of our site? [1] We use it mainly for
releases, but it’s good for other news too (see the “Other news” section).
Jekyll mades it pretty easy to add a news
A few thoughts on this.
0. I am surprised that this simplification does not happen, and I think we
should do it. Specifically, "filter(x = 0 and x is not null)" should simplify
to “filter(x = 0)”.
1. Enrico, please log a JIRA case now, and transcribe the key points of this
discussion into
Il giorno mar 24 set 2019 alle ore 13:45 XING JIN
ha scritto:
> "v = 1 and v is null"
> cannot be simplified to "v = 1" not matter v is nullable or not nullable
>
> If you really mean that "v is not null", I made below test case in
> RelOptRulesTest.java for illustration:
>
>
> // mgr is
I agree that it will get out of date. But I think we would just put
the date on each article we post and leave it to the reader to decide
if what is posted is still relevant. We could perhaps include a
disclaimer. I think it's useful for newcomers to see the activity
happening around Calcite.
--
"v = 1 and v is null"
cannot be simplified to "v = 1" not matter v is nullable or not nullable
If you really mean that "v is not null", I made below test case in
RelOptRulesTest.java for illustration:
// mgr is nullable
@Test public void testDEV() throws Exception {
HepProgram program =
Il mar 24 set 2019, 11:50 Feng Zhu ha scritto:
> Hi, Enrico,
> I'm a little confused about your expectations. Could you clarify it?
> Moreover, is it right for the below simplification (do you mean v is not
> null)?
> (v=1 and v is null) -> v=1
> (do you mean v is not null?)
>
Yes, sorry
Leonard Xu created CALCITE-3368:
---
Summary: Nonequivalent simplification happens in RexSimplify
Key: CALCITE-3368
URL: https://issues.apache.org/jira/browse/CALCITE-3368
Project: Calcite
Issue
Hi, Enrico,
I'm a little confused about your expectations. Could you clarify it?
Moreover, is it right for the below simplification (do you mean v is not
null)?
(v=1 and v is null) -> v=1
(do you mean v is not null?)
Best regards
Enrico Olivelli 于2019年9月24日周二 下午5:41写道:
> Hi,
> I have a query
Hi,
I have a query like
SELECT * FROM MYTABLE WHERE v = 1 and v is null
I am expecting Calcite to simplify it to
SELECT * FROM MYTABLE WHERE v = 1
but this does not happen.
Is any rule I should enable in order to make it happen ?
This is the configuration of my Volcano planner:
final
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