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From Albert <>
Subject Re: Question of Calcite Dynamic Code Generation Feature
Date Fri, 15 May 2020 01:12:47 GMT
like Haisheng mentioned, it is certainly debuggable, although not as
convenient as plain java code.

my understanding is that, the java code generation is merely a
demonstration of the physical plan implementation.
there are all kinds of ways to implement the logical plan, java code is
merely a `helloworld` of that.  you can see many adapters does that

On Thu, May 14, 2020 at 2:54 AM 徐泷泽 <> wrote:

> Hi buddies !
> Our team is working on developing a&nbsp; mulit data source sql engine use
> Calcite.But something confuse us,&nbsp; why calcite generate Java code
> dynamicly on SQL query, it seen have performance issues in my opinion.
> And building dynamic code object is very hard,the code is unreadable and
> hard to understood, futhermore we can not debug it.
> i wander why it was designed like that, what advantage&nbsp; of that .we
> search on internet,&nbsp;
> but nobody can realy explain it(may be we not goot at search, and poor
> english).
> so anybody can tell me the history of this, or give us some article.
> applogize for my poor english,&nbsp; hope you know what i'm taking aboult.
> thank you very very very much !

no mistakes

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