Re: KTable-KTable Join Semantics on NULL Key

2017-09-14 Thread Michael Noll 
Perhaps a clarification to what Damian said:

It is shown in the (HTML) table at the link you shared [1] what happens
when you get null values for a key.

We also have slightly better join documentation at [2], the content/text of
which we are currently migrating over to the official Apache Kafka
documentation for the Streams API (under
kafka.apache.org/documentation/streams).

[1]
https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Streams+Join+Semantics#KafkaStreamsJoinSemantics-KTable-KTableJoin
[2]
https://docs.confluent.io/current/streams/developer-guide.html#kstream-kstream-join


On Fri, Sep 8, 2017 at 3:19 PM, Damian Guy  wrote:

> It is shown in the table what happens when you get null values for a key.
>
> On Fri, 8 Sep 2017 at 12:31 Kamal Chandraprakash <
> kamal.chandraprak...@gmail.com> wrote:
>
> > Hi Kafka Users,
> >
> > KTable-KTable Join Semantics is explained in detailed [here][1]. But,
> > it's not clear when the input record is , some times the output
> > records are generated  and in some cases it's not.
> >
> > It will be helpful, if someone explain on how the output records are
> > generated for all the 3 types of joins on receiving a record with NULL
> > value.
> >
> > [1]: https://cwiki.apache.org/confluence/display/KAFKA/
> > Kafka+Streams+Join+Semantics#KafkaStreamsJoinSemantics-KTable-KTableJoin
> >
> > -- Kamal
> >
>

Re: KTable-KTable Join Semantics on NULL Key

2017-09-08 Thread Damian Guy 
It is shown in the table what happens when you get null values for a key.

On Fri, 8 Sep 2017 at 12:31 Kamal Chandraprakash <
kamal.chandraprak...@gmail.com> wrote:

> Hi Kafka Users,
>
> KTable-KTable Join Semantics is explained in detailed [here][1]. But,
> it's not clear when the input record is , some times the output
> records are generated  and in some cases it's not.
>
> It will be helpful, if someone explain on how the output records are
> generated for all the 3 types of joins on receiving a record with NULL
> value.
>
> [1]: https://cwiki.apache.org/confluence/display/KAFKA/
> Kafka+Streams+Join+Semantics#KafkaStreamsJoinSemantics-KTable-KTableJoin
>
> -- Kamal
>

KTable-KTable Join Semantics on NULL Key

2017-09-08 Thread Kamal Chandraprakash 
Hi Kafka Users,

KTable-KTable Join Semantics is explained in detailed [here][1]. But,
it's not clear when the input record is , some times the output
records are generated  and in some cases it's not.

It will be helpful, if someone explain on how the output records are
generated for all the 3 types of joins on receiving a record with NULL
value.

[1]: https://cwiki.apache.org/confluence/display/KAFKA/
Kafka+Streams+Join+Semantics#KafkaStreamsJoinSemantics-KTable-KTableJoin

-- Kamal