document-potential-rbac-optimizations #91
@ -390,6 +390,14 @@ We found some solution approaches:
|
||||
|
||||
See chapter below.
|
||||
|
||||
3. Inverting the recursion of the CTE-query, combined with the type condition.
|
||||
|
||||
Instead of starting the recursion with `currentsubjectsuuids()`,
|
||||
we could start it with the target table name and row-type,
|
||||
then recurse down to the `currentsubjectsuuids()`.
|
||||
|
||||
This idea was not yet explored.
|
||||
|
||||
|
||||
### Adding The Object Type To The Table `rbacObject`
|
||||
|
||||
@ -423,7 +431,7 @@ I also moved the function call which determines into its own WITH-section, with
|
||||
|
||||
Experimentally I moved the business condition into the CTE SELECT, also with no improvement.
|
||||
|
||||
Such rearrangements seem to be sucessfully done by the PostgreSQL query optimizer.
|
||||
Such rearrangements seem to be successfully done by the PostgreSQL query optimizer.
|
||||
|
||||
## Summary
|
||||
|
||||
|
@ -4,12 +4,13 @@ select * from hs_statistics_view;
|
||||
|
||||
-- ========================================================
|
||||
|
||||
-- An example for a restricted view (_rv) as generated by our RBAC system:
|
||||
drop view if exists hs_hosting_asset_example_rv;
|
||||
create view hs_hosting_asset_example_rv as
|
||||
with accessible_hs_hosting_asset_uuids as (
|
||||
-- This is the extracted recursive CTE query to determine the visible object UUIDs of a single table
|
||||
-- (and optionally the hosting-asset-type) as a separate VIEW.
|
||||
-- In the generated code this is part of the hs_hosting_asset_rv VIEW.
|
||||
|
||||
with recursive
|
||||
drop view if exists hs_hosting_asset_example_gv;
|
||||
create view hs_hosting_asset_example_gv as
|
||||
with recursive
|
||||
recursive_grants as (
|
||||
select distinct rbacgrants.descendantuuid,
|
||||
rbacgrants.ascendantuuid,
|
||||
@ -34,22 +35,49 @@ create view hs_hosting_asset_example_rv as
|
||||
select assertTrue((select grant_count from grant_count) < 600000,
|
||||
'too many grants for current subjects: ' || (select grant_count from grant_count)) as valid
|
||||
)
|
||||
select distinct perm.objectuuid
|
||||
select distinct perm.objectuuid
|
||||
from recursive_grants
|
||||
join rbacpermission perm on recursive_grants.descendantuuid = perm.uuid
|
||||
join rbacobject obj on obj.uuid = perm.objectuuid
|
||||
join count_check cc on cc.valid
|
||||
where obj.objecttable::text = 'hs_hosting_asset'::text
|
||||
and obj.type = 'EMAIL_ADDRESS'::hshostingassettype -- with/without this type condition
|
||||
-- with/without this type condition
|
||||
-- and obj.type = 'EMAIL_ADDRESS'::hshostingassettype
|
||||
and obj.type = 'EMAIL_ADDRESS'::hshostingassettype
|
||||
;
|
||||
|
||||
-- -----------------------------------------------------------------------------------------------
|
||||
|
||||
-- A query just on the above view, only determining visible objects, no JOIN with business data:
|
||||
|
||||
rollback transaction;
|
||||
begin transaction;
|
||||
CALL defineContext('performance testing', null, 'superuser-alex@hostsharing.net',
|
||||
'hs_booking_project#D-1000000-hshdefaultproject:ADMIN');
|
||||
-- 'hs_booking_project#D-1000300-mihdefaultproject:ADMIN');
|
||||
SET TRANSACTION READ ONLY;
|
||||
EXPLAIN ANALYZE select * from hs_hosting_asset_example_gv;
|
||||
end transaction ;
|
||||
|
||||
-- ========================================================
|
||||
|
||||
-- An example for a restricted view (_rv) similar to the one generated by our RBAC system,
|
||||
-- but using the above separate VIEW to determine the visible objects.
|
||||
|
||||
drop view if exists hs_hosting_asset_example_rv;
|
||||
create view hs_hosting_asset_example_rv as
|
||||
with accessible_hs_hosting_asset_uuids as (
|
||||
select * from hs_hosting_asset_example_gv
|
||||
)
|
||||
select target.*
|
||||
from hs_hosting_asset target
|
||||
where (target.uuid in (select accessible_hs_hosting_asset_uuids.objectuuid
|
||||
from accessible_hs_hosting_asset_uuids));
|
||||
-- end of the example view.
|
||||
|
||||
-- -------------------------------------------------------------------------------
|
||||
|
||||
-- performing several queries on the above view to determine average performance:
|
||||
|
||||
rollback transaction;
|
||||
DO language plpgsql $$
|
||||
DECLARE
|
||||
@ -90,9 +118,32 @@ $$;
|
||||
-- average seconds per recursive CTE select as role 'hs_hosting_asset:<DEBITOR>defaultproject:ADMIN'
|
||||
-- joined with business query for all 'EMAIL_ADDRESSES':
|
||||
-- D-1000000-hsh D-1000300-mih
|
||||
-- - without type comparision in rbacobject: ~3.30 - ~3.49 ~0.23
|
||||
-- - with type comparision in rbacobject: ~2.99 - ~3.08 ~0.21
|
||||
-- - without type comparison in rbacobject: ~3.30 - ~3.49 ~0.23
|
||||
-- - with type comparison in rbacobject: ~2.99 - ~3.08 ~0.21
|
||||
|
||||
-- -------------------------------------------------------------------------------
|
||||
|
||||
-- and a single query, so EXPLAIN can be used
|
||||
|
||||
rollback transaction;
|
||||
begin transaction;
|
||||
CALL defineContext('performance testing', null, 'superuser-alex@hostsharing.net',
|
||||
'hs_booking_project#D-1000000-hshdefaultproject:ADMIN');
|
||||
-- 'hs_booking_project#D-1000300-mihdefaultproject:ADMIN');
|
||||
SET TRANSACTION READ ONLY;
|
||||
|
||||
EXPLAIN SELECT * from (
|
||||
|
||||
-- An example for a business query based on the view:
|
||||
select type, uuid, identifier, caption
|
||||
from hs_hosting_asset_example_rv
|
||||
where type = 'EMAIL_ADDRESS'
|
||||
-- and identifier like 'b%'
|
||||
-- end of the business query example.
|
||||
|
||||
) ha;
|
||||
|
||||
end transaction;
|
||||
|
||||
-- =============================================================================
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user