This PR makes all of the features open source that were previously only
available in Citus Enterprise.
Features that this adds:
1. Non blocking shard moves/shard rebalancer
(`citus.logical_replication_timeout`)
2. Propagation of CREATE/DROP/ALTER ROLE statements
3. Propagation of GRANT statements
4. Propagation of CLUSTER statements
5. Propagation of ALTER DATABASE ... OWNER TO ...
6. Optimization for COPY when loading JSON to avoid double parsing of
the JSON object (`citus.skip_jsonb_validation_in_copy`)
7. Support for row level security
8. Support for `pg_dist_authinfo`, which allows storing different
authentication options for different users, e.g. you can store
passwords or certificates here.
9. Support for `pg_dist_poolinfo`, which allows using connection poolers
in between coordinator and workers
10. Tracking distributed query execution times using
citus_stat_statements (`citus.stat_statements_max`,
`citus.stat_statements_purge_interval`,
`citus.stat_statements_track`). This is disabled by default.
11. Blocking tenant_isolation
12. Support for `sslkey` and `sslcert` in `citus.node_conninfo`
It can be useful, e.g. in the upcoming prepared statement support, to
be able to return an error from a function that is not raised
immediately, but can later be thrown. That allows e.g. to attempt to
plan a statment using different methods and to create good error
messages in each planner, but to only error out after all planners
have been run.
To enable that create support for deferred error messages that can be
created (supporting errorcode, message, detail, hint) in one function,
and then thrown in different place.
Jelte Fennema
SaitTalhaNisanci
Philip Dubé
Jason Petersen
mehmet furkan şahin
Brian Cloutier
Andres Freund