Problem:
when create table as select using to_date function, it would failed
Example:
create table test_to_date properties('replication_num' = '1') as select to_date('20230816') as datev2;
Reason:
after release version 2.0, datev1 is disabled, but to_date function signature does not upgrade, so it failed when checking return type of to_date
Solved:
when getfunction, forbidden to_date with return type date_v1， datetime v1 also changed to datetime v2 and decimal v2 changed to decimal v3
e3bbba82cf