[Feature request] Support lookup join in Flink 1.15

itinycheng / flink-connector-clickhouse

Flink SQL connector for ClickHouse. Support ClickHouseCatalog and read/write primary data, maps, arrays to clickhouse.

Apache License 2.0

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[Feature request] Support lookup join in Flink 1.15 #97

Closed nylqd closed 8 months ago

nylqd commented 10 months ago

Hello, I am a user of flink-clickhouse-connector and I am interested in using lookup join with ClickHouse tables in Flink 1.15. I noticed that the connector supports lookup join in Flink 1.16, but not in Flink 1.15. Is there any possibility to backport this feature to Flink 1.15? If so, what are the steps and challenges involved? If not, what are the reasons and limitations? Thank you for your time and attention.

itinycheng commented 10 months ago

Hi @nylqd The user-side interfaces of the lookup feature have significant changes in Flink 1.16, therefore it may be difficult to backport to an earlier version.