根据文档https://ci.apache.org/projects/flink/flink-docs-release-1.10/dev/table/streaming/joins.html#join-with-a-temporal-table， 临时表table source 必须要继承LookupableTableSource， 但是，看到https://ci.apache.org/projects/flink/flink-docs-release-1.10/dev/table/connect.html#jdbc-connector
-- lookup options, optional, used in temporary join'connector.lookup.cache.max-rows'='5000',-- optional, max number of rows of lookup cache, over this value, the oldest rows will-- be eliminated. "cache.max-rows" and "cache.ttl" options must all be specified if any-- of them is specified. Cache is not enabled as default.'connector.lookup.cache.ttl'='10s',-- optional, the max time to live for each rows in lookup cache, over this time, the oldest rows-- will be expired. "cache.max-rows" and "cache.ttl" options must all be specified if any of-- them is specified. Cache is not enabled as default.'connector.lookup.max-retries'='3',-- optional, max retry times if lookup database failed 是不是说在flink sql JDBC Connector DDL中，加上这三个配置项，那么创建的表就是Temporal Table，可以在temporary join 中使用？
