Hi,
Yes, currently, multiple lookup join is not parallel and execute one by
one.
Async lookup + cache is the suggested way to improve performance.
If the lookup tables are not large, you can also implement a ALL cache for
the LookupTableSource to cache all the data in the database, and reload
peri
HI:
My flink version is 1.10 use per-job mode , my sql like
```
select
column1, t2.xx2, t3.xx3,t4.xx4
… t40.xx40
from
main_table
left join lookup_1 FOR SYSTEM_TIME AS OF t1.proc_time AS t2 on t1.xx= t2.xx
left join lookup_2 FOR SYSTEM_TIME AS OF t1.proc_time AS t3 on t1.xx=
