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Re: Flink table api


Hello Fabian,

According to my requirement I can not create static pojo's for all classes
because I want to create dynamic jobs for all tables based on rule engine
config. Please suggest me if there any other way to achieve this.

-----------------------------------------------
*Amol Suryawanshi*
Java Developer
amols@xxxxxxxxxxxxxxx


*iProgrammer Solutions Pvt. Ltd.*



*Office 103, 104, 1st Floor Pride Portal,Shivaji Housing Society,
Bahiratwadi,Near Hotel JW Marriott, Off Senapati Bapat Road, Pune - 411016,
MH, INDIA.**Phone: +91 9689077510 | Skype: amols_iprogrammer*
www.iprogrammer.com <sachin@xxxxxxxxxxxxxxx>
------------------------------------------------

On Mon, Jul 2, 2018 at 4:02 PM, Fabian Hueske <fhueske@xxxxxxxxx> wrote:

> Hi Amol,
>
> These are the requirements for POJOs [1] that are fully supported by Flink.
>
> Best, Fabian
>
> [1]
> https://ci.apache.org/projects/flink/flink-docs-
> release-1.5/dev/api_concepts.html#pojos
>
> 2018-07-02 12:19 GMT+02:00 Amol S - iProgrammer <amols@xxxxxxxxxxxxxxx>:
>
> > Hello Xingcan
> >
> > As mentioned in above mail thread I am streaming mongodb oplog to join
> > multiple mongo tables based on some unique key (Primary key). To achieve
> > this I have created one java pojo as below. where o represent generic
> pojo
> > type of mongodb which has my table fields i.e. dynamic. now I want to use
> > table api join over this basic BasicDBObject but it seem flink does not
> > allow generic pojo's. please suggest on this.
> >
> > public class Oplog {
> >     private OplogTimestamp ts;
> >     private BasicDBObject o;
> > }
> >
> >
> >
> > -----------------------------------------------
> > *Amol Suryawanshi*
> > Java Developer
> > amols@xxxxxxxxxxxxxxx
> >
> >
> > *iProgrammer Solutions Pvt. Ltd.*
> >
> >
> >
> > *Office 103, 104, 1st Floor Pride Portal,Shivaji Housing Society,
> > Bahiratwadi,Near Hotel JW Marriott, Off Senapati Bapat Road, Pune -
> 411016,
> > MH, INDIA.**Phone: +91 9689077510 | Skype: amols_iprogrammer*
> > www.iprogrammer.com <sachin@xxxxxxxxxxxxxxx>
> > ------------------------------------------------
> >
> > On Mon, Jul 2, 2018 at 3:03 PM, Amol S - iProgrammer <
> > amols@xxxxxxxxxxxxxxx>
> > wrote:
> >
> > > Hello Xingcan
> > >
> > > DataStream<Oplog> streamSource = env
> > >         .addSource(kafkaConsumer)
> > >         .setParallelism(4);
> > >
> > > StreamTableEnvironment tableEnv = TableEnvironment.
> > getTableEnvironment(env);
> > > // Convert the DataStream into a Table with default fields "f0", "f1"
> > > Table table1 = tableEnv.fromDataStream(streamSource);
> > >
> > >
> > > Table customerMISMaster = table1.filter("ns ===
> > 'local.customerMISMaster'"
> > > ).select("o as master");
> > > Table customerMISChild1 = table1.filter("ns ===
> > 'local.customerMISChild1'"
> > > ).select("o as child1");
> > > Table customerMISChild2 = table1.filter("ns ===
> > 'local.customerMISChild2'"
> > > ).select("o as child2");
> > > Table result = customerMISMaster.join(customerMISChild1).where("
> master.
> > > loanApplicationId=child1.loanApplicationId");
> > >
> > >
> > > it is throwing error "Method threw 'org.apache.flink.table.api.
> ValidationException'
> > exception. Undefined function: LOANAPPLICATIONID"
> > >
> > >
> > >
> > > -----------------------------------------------
> > > *Amol Suryawanshi*
> > > Java Developer
> > > amols@xxxxxxxxxxxxxxx
> > >
> > >
> > > *iProgrammer Solutions Pvt. Ltd.*
> > >
> > >
> > >
> > > *Office 103, 104, 1st Floor Pride Portal,Shivaji Housing Society,
> > > Bahiratwadi,Near Hotel JW Marriott, Off Senapati Bapat Road, Pune -
> > 411016,
> > > MH, INDIA.**Phone: +91 9689077510 | Skype: amols_iprogrammer*
> > > www.iprogrammer.com <sachin@xxxxxxxxxxxxxxx>
> > > ------------------------------------------------
> > >
> > > On Mon, Jul 2, 2018 at 2:56 PM, Xingcan Cui <xingcanc@xxxxxxxxx>
> wrote:
> > >
> > >> Hi Amol,
> > >>
> > >> The “dynamic table” is just a logical concept, following which the
> Flink
> > >> table API is designed.
> > >> That means you don’t need to implement dynamic tables yourself.
> > >>
> > >> Flink table API provides different kinds of stream to stream joins in
> > >> recent versions (from 1.4).
> > >> The related docs can be found here https://ci.apache.org/projects
> > >> /flink/flink-docs-release-1.5/dev/table/tableApi.html#joins <
> > >> https://ci.apache.org/projects/flink/flink-docs-release-1.5
> > >> /dev/table/tableApi.html#joins>.
> > >>
> > >> Best,
> > >> Xingcan
> > >>
> > >>
> > >> > On Jul 2, 2018, at 4:49 PM, Amol S - iProgrammer <
> > amols@xxxxxxxxxxxxxxx>
> > >> wrote:
> > >> >
> > >> > Hello,
> > >> >
> > >> > I am streaming mongodb oplog using kafka and flink and want to join
> > >> > multiple tables using flink table api but i have some concerns like
> is
> > >> it
> > >> > possible to join streamed tables in flink and if yes then please
> > >> provide me
> > >> > some example of stream join using table API.
> > >> >
> > >> > I gone through your dynamic table api doc. it is quit interesting
> but
> > >> > haven't found any example tutorial how to implement dynamic table.
> > >> >
> > >> > I have tried to implement table api join using pojo class but it is
> > >> > giving org.apache.flink.table.api.TableException: Cannot generate a
> > >> valid
> > >> > execution plan for the given query
> > >> >
> > >> > -----------------------------------------------
> > >> > *Amol Suryawanshi*
> > >> > Java Developer
> > >> > amols@xxxxxxxxxxxxxxx
> > >> >
> > >> >
> > >> > *iProgrammer Solutions Pvt. Ltd.*
> > >> >
> > >> >
> > >> >
> > >> > *Office 103, 104, 1st Floor Pride Portal,Shivaji Housing Society,
> > >> > Bahiratwadi,Near Hotel JW Marriott, Off Senapati Bapat Road, Pune -
> > >> 411016,
> > >> > MH, INDIA.**Phone: +91 9689077510 | Skype: amols_iprogrammer*
> > >> > www.iprogrammer.com <sachin@xxxxxxxxxxxxxxx>
> > >> > ------------------------------------------------
> > >>
> > >>
> > >
> >
>