wuchong commented on a change in pull request #13732:
URL: https://github.com/apache/flink/pull/13732#discussion_r510233222
##########
File path:
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/table/KafkaDynamicSource.java
##########
@@ -202,4 +268,169 @@ public int hashCode() {
return kafkaConsumer;
}
+
+ //
--------------------------------------------------------------------------------------------
+ // Metadata handling
+ //
--------------------------------------------------------------------------------------------
+
+ private enum ReadableMetadata {
+ TOPIC(
+ "topic",
+ DataTypes.STRING().notNull(),
+ record -> StringData.fromString(record.topic())
+ ),
+
+ PARTITION(
+ "partition",
+ DataTypes.INT().notNull(),
+ ConsumerRecord::partition
+ ),
+
+ HEADERS(
+ "headers",
+ // key and value of the map are nullable to make
handling easier in queries
+ DataTypes.MAP(DataTypes.STRING().nullable(),
DataTypes.BYTES().nullable()).notNull(),
+ record -> {
+ final Map<StringData, byte[]> map = new
HashMap<>();
+ for (Header header : record.headers()) {
+
map.put(StringData.fromString(header.key()), header.value());
+ }
+ return new GenericMapData(map);
+ }
+ ),
+
+ LEADER_EPOCH(
+ "leader-epoch",
Review comment:
Is that possible to remove the prefix of `debezium-json`? The Javadoc
also says "In case of duplicate names in format and source keys, format keys
shall have higher precedence."
So far, the metadata keys of format and source are very different.
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