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 differently. On Thu, May 14, 2020 at 2:54 AM 徐泷泽 <15258826...@qq.com> wrote: > Hi buddies ! > Our team is working on developing a mulit data source sql engine use > Calcite.But something confuse us, 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 of that .we > search on internet, > 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, hope you know what i'm taking aboult. > thank you very very very much ! -- ~~~~~~~~~~~~~~~ no mistakes ~~~~~~~~~~~~~~~~~~
