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Re: Flink table api


Hello Fabian,

The output of customerMISMaster.printSchema() is undefined

-----------------------------------------------
*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 3:49 PM, Fabian Hueske <fhueske@xxxxxxxxx> wrote:

>  Hi,
>
> It looks like the type of master is not known to Flink.
> What's the output of
>
> customerMISMaster.printSchema(); ?
>
> Best, Fabian
>
>
>
> 2018-07-02 11:33 GMT+02:00 Amol S - iProgrammer <amols@xxxxxxxxxxxxxxx>:
>
> > 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>
> > > > ------------------------------------------------
> > >
> > >
> >
>