Hi,
When I was using hbase table as my lookup table, I got this error: Caused by: java.lang.IllegalArgumentException: Currently, HBase table can only be lookup by single row key. at org.apache.flink.util.Preconditions.checkArgument(Preconditions.java:138) My SQL is insert into sink_kafka(user_ucid,city_code,`source`,system_type) SELECT t1.ucid AS user_ucid, t1.city_code, t1.`source`, t1.system_type FROM tmp_ucid_check t1 LEFT JOIN dim_hbase_valid_im_commercial_cust_di_cache for SYSTEM_TIME AS OF t1.proctime AS t2 ON concat(t1.ucid,'&',t1.city_code) = t2.rowKey WHERE t2.city_code is NOT null AND t1.city_code = t2.city_code; It maybe because the conditions in where clause, being pushed down as a predicate into join clause ? How can I solve this problem ? Thank you