Hi Bhavya, Sorry I do not understand your question. Why is it difficult to pass sth. to child operators?
Best, Liya Fan On Fri, Dec 18, 2020 at 12:38 PM Bhavya Aggarwal <bha...@knoldus.com> wrote: > Hi Liya, > > Actually the question is how to pass the projection columns to Table Scan > as right now in the LogicalTableScan there are no projection columns being > passed so when I am trying to create my custom JSON , I do not have those > projected columns or columns that are being used in the query. I want to > understand what is the calcite mechanism for passing it to child operators > without using Rules as it will be a lot of rule that we need to implement. > > Thanks and Regards > Bhavya > > On Fri, Dec 18, 2020 at 9:47 AM Fan Liya <liya.fa...@gmail.com> wrote: > > > Hi Bhavya, > > > > It seems the problem is that the json format provided by Calcite does not > > include properties specific to your operator? > > If so, I think you can override RelNode#explainTerms in your operator to > > attach the properties. > > > > Best, > > Liya Fan > > > > On Thu, Dec 17, 2020 at 10:45 PM Bhavya Aggarwal <bha...@knoldus.com> > > wrote: > > > > > Please let me know if we have an example for writing a custom visitor > > that > > > I can use. I see a RelVisitor class that I can extend but how to make > it > > to > > > visit the specific Physical Operator. > > > > > > Thanks and Regards > > > Bhavya > > > > > > On Thu, Dec 17, 2020 at 7:43 PM Bhavya Aggarwal <bha...@knoldus.com> > > > wrote: > > > > > > > Thanks, > > > > > > > > I tried using the RelJsonWriter and tried to add my custom > > implementation > > > > in the my custom Rel Nodes but I am not getting all the data in my > > child > > > > operators. We are trying to use Calcite for a columnar data and we > need > > > the > > > > information of the projections in the TableScan as well because we > need > > > to > > > > pass those projections to read specific columns but I am not able to > > find > > > > the projections in my Table scan. As per my understanding Calcite > > should > > > be > > > > passing this information as it is required for me reading the table. > > > Please > > > > let me know if I need to do something special to get that information > > in > > > > the child operator. > > > > > > > > Regards > > > > Bhavya > > > > > > > > On Sun, Dec 13, 2020 at 11:32 PM Michael Mior <mm...@apache.org> > > wrote: > > > > > > > >> That would likely be the best approach if you have some specific > JSON > > > >> format you're trying to generate. If you're happy with a JSON format > > > >> defined by Calcite, you can look at RelJsonWriter. > > > >> > > > >> -- > > > >> Michael Mior > > > >> mm...@apache.org > > > >> > > > >> Le dim. 13 déc. 2020 à 05:36, Muhammad Gelbana <mgelb...@apache.org > > > > a > > > >> écrit : > > > >> > > > > >> > I would use a visitor to traverse the optimized/physical plan. > > > >> > > > > >> > > > > >> > > > > >> > On Sun, Dec 13, 2020 at 6:42 AM Bhavya Aggarwal < > bha...@knoldus.com > > > > > > >> wrote: > > > >> > > > > >> > > Hi All, > > > >> > > > > > >> > > We need to generate a JSON object for the physical execution > tree > > > >> that has > > > >> > > been created. Is there an option in Calcite that we can use to > do > > > >> this. I > > > >> > > am not sure what is the right approach to do it. Please let me > > know > > > if > > > >> > > there are different ways to achieve this. > > > >> > > > > > >> > > Regards > > > >> > > Bhavya > > > >> > > > > > >> > > -- > > > >> > > Your feedback matters - At Knoldus we aim to be very > professional > > in > > > >> our > > > >> > > quality of work, commitment to results, and proactive > > communication. > > > >> If > > > >> > > you > > > >> > > feel otherwise please share your feedback > > > >> > > <https://forms.gle/Ax1Te1DDpirAQuQ8A> and we would work on it. > > > >> > > > > > >> > > > > > > > > > > > > -- > > > > *Bhavya Aggarwal* > > > > CTO & Partner > > > > Knoldus Inc. <http://www.knoldus.com/> > > > > +91-9910483067 > > > > Canada - USA - India - Singapore > > > > <https://in.linkedin.com/company/knoldus> < > > https://twitter.com/Knolspeak > > > > > > > > <https://www.facebook.com/KnoldusSoftware/> < > https://blog.knoldus.com/ > > > > > > > > > > > > > > > > -- > > > *Bhavya Aggarwal* > > > CTO & Partner > > > Knoldus Inc. <http://www.knoldus.com/> > > > +91-9910483067 > > > Canada - USA - India - Singapore > > > <https://in.linkedin.com/company/knoldus> < > https://twitter.com/Knolspeak > > > > > > <https://www.facebook.com/KnoldusSoftware/> <https://blog.knoldus.com/ > > > > > > > > -- > > > Your feedback matters - At Knoldus we aim to be very professional in > our > > > quality of work, commitment to results, and proactive communication. If > > > you > > > feel otherwise please share your feedback > > > <https://forms.gle/Ax1Te1DDpirAQuQ8A> and we would work on it. > > > > > > > > -- > *Bhavya Aggarwal* > CTO & Partner > Knoldus Inc. <http://www.knoldus.com/> > +91-9910483067 > Canada - USA - India - Singapore > <https://in.linkedin.com/company/knoldus> <https://twitter.com/Knolspeak> > <https://www.facebook.com/KnoldusSoftware/> <https://blog.knoldus.com/> > > -- > Your feedback matters - At Knoldus we aim to be very professional in our > quality of work, commitment to results, and proactive communication. If > you > feel otherwise please share your feedback > <https://forms.gle/Ax1Te1DDpirAQuQ8A> and we would work on it. >
