125 lines
4.7 KiB
PL/PgSQL
125 lines
4.7 KiB
PL/PgSQL
-- just a permanent playground to explore optimization of the central recursive CTE query for RBAC
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select * from hs_statistics_view;
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-- ========================================================
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-- An example for a restricted view (_rv) as generated by our RBAC system:
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drop view if exists hs_hosting_asset_example_rv;
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create view hs_hosting_asset_example_rv as
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with accessible_hs_hosting_asset_uuids as (
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with recursive
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recursive_grants as (
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select distinct rbacgrants.descendantuuid,
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rbacgrants.ascendantuuid,
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1 as level,
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true
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from rbacgrants
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where (rbacgrants.ascendantuuid = any (currentsubjectsuuids()))
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and rbacgrants.assumed
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union all
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select distinct g.descendantuuid,
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g.ascendantuuid,
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grants.level + 1 as level,
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assertTrue(grants.level < 22, 'too many grant-levels: ' || grants.level)
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from rbacgrants g
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join recursive_grants grants on grants.descendantuuid = g.ascendantuuid
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where g.assumed
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),
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grant_count as (
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select count(*) as grant_count from recursive_grants
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),
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count_check as (
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select assertTrue((select grant_count from grant_count) < 600000,
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'too many grants for current subjects: ' || (select grant_count from grant_count)) as valid
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)
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select distinct perm.objectuuid
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from recursive_grants
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join rbacpermission perm on recursive_grants.descendantuuid = perm.uuid
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join rbacobject obj on obj.uuid = perm.objectuuid
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join count_check cc on cc.valid
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where obj.objecttable::text = 'hs_hosting_asset'::text
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and obj.type = 'EMAIL_ADDRESS'::hshostingassettype -- with/without this type condition
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)
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select target.*
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from hs_hosting_asset target
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where (target.uuid in (select accessible_hs_hosting_asset_uuids.objectuuid
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from accessible_hs_hosting_asset_uuids));
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-- end of the example view.
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-- -------------------------------------------------------------------------------
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rollback transaction;
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DO language plpgsql $$
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DECLARE
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start_time timestamp;
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end_time timestamp;
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total_time interval;
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letter char(1);
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BEGIN
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start_time := clock_timestamp();
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CALL defineContext('performance testing', null, 'superuser-alex@hostsharing.net',
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'hs_booking_project#D-1000000-hshdefaultproject:ADMIN');
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-- 'hs_booking_project#D-1000300-mihdefaultproject:ADMIN');
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SET TRANSACTION READ ONLY;
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FOR i IN 0..25 LOOP
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letter := chr(i+ascii('a'));
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PERFORM count(*) from (
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-- An example for a business query based on the view:
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select type, uuid, identifier, caption
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from hs_hosting_asset_example_rv
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where type = 'EMAIL_ADDRESS'
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and identifier like letter || '%'
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-- end of the business query example.
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) AS timed;
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END LOOP;
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end_time := clock_timestamp();
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total_time := end_time - start_time;
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RAISE NOTICE 'average execution time: %', total_time/26;
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END;
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$$;
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-- average seconds per recursive CTE select as role 'hs_hosting_asset:<DEBITOR>defaultproject:ADMIN'
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-- joined with business query for all 'EMAIL_ADDRESSES':
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-- D-1000000-hsh D-1000300-mih
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-- - without type comparision in rbacobject: ~3.30 - ~3.49 ~0.23
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-- - with type comparision in rbacobject: ~2.99 - ~3.08 ~0.21
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-- =============================================================================
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-- extending the rbacobject table:
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alter table rbacobject
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-- just for performance testing, we would need a joined enum or a varchar(16) which would make it slow
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add column type hshostingassettype;
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-- and fill the type column with hs_hosting_asset types:
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rollback transaction;
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begin transaction;
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call defineContext('setting rbacobject.type from hs_hosting_asset.type', null, 'superuser-alex@hostsharing.net');
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UPDATE rbacobject
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SET type = hs.type
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FROM hs_hosting_asset hs
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WHERE rbacobject.uuid = hs.uuid;
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end transaction;
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-- check the result:
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select
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(select count(*) as "total" from rbacobject),
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(select count(*) as "not null" from rbacobject where type is not null),
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(select count(*) as "null" from rbacobject where type is null);
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