hailin0 commented on code in PR #4649:
URL: https://github.com/apache/iceberg/pull/4649#discussion_r864833701
##########
flink/v1.14/flink/src/main/java/org/apache/iceberg/flink/IcebergTableSource.java:
##########
@@ -47,7 +55,8 @@
* Flink Iceberg table source.
*/
public class IcebergTableSource
- implements ScanTableSource, SupportsProjectionPushDown,
SupportsFilterPushDown, SupportsLimitPushDown {
+ implements ScanTableSource, LookupTableSource, SupportsProjectionPushDown,
SupportsFilterPushDown,
Review Comment:
https://nightlies.apache.org/flink/flink-docs-release-1.14/docs/dev/table/sql/queries/joins/#lookup-join
e.g
Use iceberg as the only storage data source, while store batch and streaming
datas
```
SELECT
click_event.*,
city_metadata.province,
city_metadata.longitude,
city_metadata.latitude,
user_metadata.NAME,
user_metadata.department,
user_metadata.age,
user_metadata.address,
user_metadata.tel,
user_metadata.email
FROM
`click_event`
LEFT JOIN `city` FOR SYSTEM_TIME AS OF click_event.proc_time AS
`city_metadata` ON click_event.city_name = city_metadata.city_name
LEFT JOIN `user` FOR SYSTEM_TIME AS OF click_event.proc_time AS
`user_metadata` ON click_event.user_id = user_metadata.id
```
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