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https://issues.apache.org/jira/browse/SPARK-20597?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jacek Laskowski updated SPARK-20597:
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Description:
# {{KafkaSourceProvider}} supports {{topic}} option that sets the Kafka topic
to save a DataFrame's rows to
# {{KafkaSourceProvider}} can use {{topic}} column to assign rows to Kafka
topics for writing
What seems a quite interesting option is to support {{start(path: String)}} as
the least precedence option in which {{path}} would designate the default topic
when no other options are used.
{code}
df.writeStream.format("kafka").start("topic")
{code}
See
http://apache-spark-developers-list.1001551.n3.nabble.com/KafkaSourceProvider-Why-topic-option-and-column-without-reverting-to-path-as-the-least-priority-td21458.html
for discussion
was:
1. {{KafkaSourceProvider}} supports {{topic}} option that sets the Kafka topic
to save a DataFrame to.
1. {{KafkaSourceProvider}} can use {{topic}} column to assign rows to Kafka
topics for writing
but what seems quite interesting is to support {{start(path: String)}} as the
least precedence option in which {{path}} would designate the default topic
when no other options are used.
{code}
df.writeStream.format("kafka").start(path = "topic")
{code}
See
http://apache-spark-developers-list.1001551.n3.nabble.com/KafkaSourceProvider-Why-topic-option-and-column-without-reverting-to-path-as-the-least-priority-td21458.html
for discussion
> KafkaSourceProvider falls back on path as synonym for topic
> -----------------------------------------------------------
>
> Key: SPARK-20597
> URL: https://issues.apache.org/jira/browse/SPARK-20597
> Project: Spark
> Issue Type: Improvement
> Components: Structured Streaming
> Affects Versions: 2.2.0
> Reporter: Jacek Laskowski
> Priority: Trivial
>
> # {{KafkaSourceProvider}} supports {{topic}} option that sets the Kafka topic
> to save a DataFrame's rows to
> # {{KafkaSourceProvider}} can use {{topic}} column to assign rows to Kafka
> topics for writing
> What seems a quite interesting option is to support {{start(path: String)}}
> as the least precedence option in which {{path}} would designate the default
> topic when no other options are used.
> {code}
> df.writeStream.format("kafka").start("topic")
> {code}
> See
> http://apache-spark-developers-list.1001551.n3.nabble.com/KafkaSourceProvider-Why-topic-option-and-column-without-reverting-to-path-as-the-least-priority-td21458.html
> for discussion
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