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https://issues.apache.org/jira/browse/FLINK-8558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16538435#comment-16538435
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ASF GitHub Bot commented on FLINK-8558:
---------------------------------------
Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/6264#discussion_r201309003
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/sources/DefinedFieldMapping.scala
---
@@ -50,7 +50,8 @@ trait DefinedFieldMapping {
* type. It can also provide a mapping for fields which are not in the
[[TableSchema]] to make
* fields in the physical [[TypeInformation]] accessible for a
[[TimestampExtractor]].
*
- * @return A mapping from [[TableSchema]] fields to [[TypeInformation]]
fields.
+ * @return A mapping from [[TableSchema]] fields to [[TypeInformation]]
fields or
--- End diff --
This is public API that we cannot change easily. I think the reason why
Fabian chose null here is also for interoperability between Scala and Java.
> Add unified format interfaces and format discovery
> --------------------------------------------------
>
> Key: FLINK-8558
> URL: https://issues.apache.org/jira/browse/FLINK-8558
> Project: Flink
> Issue Type: New Feature
> Components: Streaming Connectors
> Reporter: Timo Walther
> Assignee: Timo Walther
> Priority: Major
> Labels: pull-request-available
>
> In the last release, we introduced a new module {{flink-formats}}. Currently
> only {{flink-avro}} is located there but we will add more formats such as
> {{flink-json}}, {{flink-protobuf}}, and so on. For better separation of
> concerns we want decouple connectors from formats: e.g., remove
> {{KafkaAvroTableSource}} and {{KafkaJsonTableSource}}.
> A newly introduced {{FormatFactory}} will use Java service loaders to
> discovery available formats in the classpath (similar to how file systems are
> discovered now). A {{Format}} will provide a method for converting {{byte[]}}
> to target record type.
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