* Add udf to include shardId in broken partition shard index names
* Address reviews: rename index such that operations can be done on it
* More comprehensive index tests
* Final touches and formatting
There was a small part in multi_partitioning that would need an
alternative output for pg14. Instead of adding an alternative for the
whole file, we created a new file, called partition_wise_join.sql and
added the alternative output for that.
Before this commit, we always synced the metadata with superuser.
However, that creates various edge cases such as visibility errors
or self distributed deadlocks or complicates user access checks.
Instead, with this commit, we use the current user to sync the metadata.
Note that, `start_metadata_sync_to_node` still requires super user
because accessing certain metadata (like pg_dist_node) always require
superuser (e.g., the current user should be a superuser).
However, metadata syncing operations regarding the distributed
tables can now be done with regular users, as long as the user
is the owner of the table. A table owner can still insert non-sense
metadata, however it'd only affect its own table. So, we cannot do
anything about that.
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