RDB$GET_TRANSACTION_CN works different in Super and Classic [CORE6003] #6253
Description
Submitted by: @asfernandes
Open two connections C1 and C2.
C2: select current_transaction from rdb$database; -- let's call the
result T2
C2: commit;
C1: select rdb$get_transaction_cn(T2) from rdb$database;
In Super C1 returns the commit number. In Classic it returns NULL.
Commits: e9f4c65