Cause
An attempt was made to call either the CURRENT_SHARD_KEY or CURRENT_PSET_KEY function in a non-sharded environment.
Action
Use the CURRENT_SHARD_KEY or CURRENT_PSET_KEY function only on shard databases.
Oracle 26ai
ORA-03809
Error Message
invalid database context for CURRENT_SHARD_KEY or CURRENT_PSET_KEY function