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use pg_current_xact_id() and xid8

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This commit is contained in:
Michael Hoennig 2024-08-27 16:31:37 +02:00
parent 8a32143d91
commit 0ae08b3714
2 changed files with 29 additions and 72 deletions
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75
sql/historization.sql
View File

@ -1,9 +1,9 @@
rollback;
drop table if exists hs_hosting_asset_versions;
drop table if exists hs_hosting_asset_ex;
drop view if exists hs_hosting_asset_hv;
drop table if exists hs_hosting_asset_ex;
drop procedure if exists tx_create_historicization;
drop view if exists tx_create_historical_view;
drop trigger if exists hs_hosting_asset_tx_historicize_tg on hs_hosting_asset;
drop function if exists tx_historicize_tf();
drop type if exists tx_operation;
@ -54,59 +54,13 @@ begin
"alive" := false;
end if;
sql := format('INSERT INTO %3$I_ex VALUES (DEFAULT, txid_current(), %1$L, %2$L, $1.*)', TG_OP, alive, TG_TABLE_NAME);
sql := format('INSERT INTO %3$I_ex VALUES (DEFAULT, pg_current_xact_id(), %1$L, %2$L, $1.*)', TG_OP, alive, TG_TABLE_NAME);
raise notice 'sql: %', sql;
execute sql using "row";
return "row";
end; $$;
create or replace procedure tx_create_historical_view(baseTable varchar)
language plpgsql as $$
declare
createTriggerSQL varchar;
viewName varchar;
exVersionsTable varchar;
createViewSQL varchar;
baseCols varchar;
begin
viewName = quote_ident(format('%s_hv', baseTable));
exVersionsTable = quote_ident(format('%s_ex', baseTable));
baseCols = (select string_agg(quote_ident(column_name), ', ')
from information_schema.columns
where table_schema = 'public'
and table_name = baseTable);
createViewSQL = format(
'CREATE OR REPLACE VIEW %1$s AS' ||
'(' ||
' SELECT %2$s' ||
' FROM %3$s' ||
' WHERE alive = TRUE' ||
' AND version_id IN' ||
' (' ||
' SELECT max(ex.version_id) AS history_id' ||
' FROM %3$s AS ex' ||
' JOIN tx_context as txc ON ex.txid = txc.txid' ||
' WHERE txc.txtimestamp <= current_setting(''hsadminng.tx_history_timestamp'')::timestamp' ||
' OR txc.txid = current_setting(''hsadminng.tx_history_txid'')' ||
' GROUP BY uuid' ||
' )' ||
')',
viewName, baseCols, exVersionsTable
);
raise notice 'sql: %', createViewSQL;
execute createViewSQL;
createTriggerSQL = 'CREATE TRIGGER ' || baseTable || '_tx_historicize_tf' ||
' AFTER INSERT OR DELETE OR UPDATE ON ' || baseTable ||
' FOR EACH ROW EXECUTE PROCEDURE tx_historicize_tf()';
raise notice 'sql: %', createTriggerSQL;
execute createTriggerSQL;
end; $$;
create or replace procedure tx_create_historicization(baseTable varchar)
language plpgsql as $$
declare
@ -122,7 +76,7 @@ begin
createHistTableSql = '' ||
'CREATE TABLE ' || baseTable || '_ex (' ||
' version_id serial PRIMARY KEY,' ||
' txid bigint NOT NULL REFERENCES tx_context(txid),' ||
' txid xid8 NOT NULL REFERENCES tx_context(txid),' ||
' trigger_op tx_operation NOT NULL,' ||
' alive boolean not null,' ||
' LIKE ' || baseTable ||
@ -151,7 +105,7 @@ begin
' SELECT max(ex.version_id) AS history_id' ||
' FROM %3$s AS ex' ||
' JOIN tx_context as txc ON ex.txid = txc.txid' ||
' WHERE txc.txtimestamp <= current_setting(''hsadminng.tx_history_timestamp'')::timestamp' ||
' WHERE txc.txid = current_setting(''hsadminng.tx_history_txid'', true)::xid8' ||
' GROUP BY uuid' ||
' )' ||
')',
@ -160,7 +114,7 @@ begin
raise notice 'sql: %', createViewSQL;
execute createViewSQL;
createTriggerSQL = 'CREATE TRIGGER ' || baseTable || '_tx_historicize_tf' ||
createTriggerSQL = 'CREATE TRIGGER ' || baseTable || '_tx_historicize_tg' ||
' AFTER INSERT OR DELETE OR UPDATE ON ' || baseTable ||
' FOR EACH ROW EXECUTE PROCEDURE tx_historicize_tf()';
raise notice 'sql: %', createTriggerSQL;
@ -170,12 +124,13 @@ end; $$;
--- ==================================================
call tx_create_historicization('hs_hosting_asset');
call tx_create_historicization('hs_hosting_asset'); -- FIXME: move to 7010-hosting-asset.sql
-- and expanded:
-- ===========================================================================================
rollback;
begin transaction;
call defineContext('historization testing', null, 'superuser-alex@hostsharing.net',
@ -183,17 +138,19 @@ call defineContext('historization testing', null, 'superuser-alex@hostsharing.ne
-- 'hs_booking_project#D-1000300-mihdefaultproject:ADMIN'); -- prod
-- 'hs_booking_project#D-1000300-mimdefaultproject:ADMIN'); -- test
-- update hs_hosting_asset set caption='lug00 b' where identifier = 'lug00' and type = 'MANAGED_WEBSPACE'; -- prod
update hs_hosting_asset set caption='mim00 A ' || now()::text where identifier = 'mim00' and type = 'MANAGED_WEBSPACE'; -- test
update hs_hosting_asset set caption='mim00 B ' || now()::text where identifier = 'mim00' and type = 'MANAGED_WEBSPACE'; -- test
update hs_hosting_asset set caption='hsh00 E ' || now()::text where identifier = 'hsh00' and type = 'MANAGED_WEBSPACE'; -- test
update hs_hosting_asset set caption='hsh00 F ' || now()::text where identifier = 'hsh00' and type = 'MANAGED_WEBSPACE'; -- test
commit;
-- single version at point in time
-- set hsadminng.tx_history_timestamp to '2024-08-27 07:44:03'; -- UTC
set hsadminng.tx_history_timestamp to '2024-08-27 07:44:03'; -- UTC
select uuid, version, identifier, caption from hs_hosting_asset_hv p where identifier in ('lug00', 'mim00');
-- set hsadminng.tx_history_txid to (select max(txid) from tx_context where txtimestamp<='2024-08-27 12:13:13.450821');
SELECT set_config('hsadminng.tx_history_txid', (select max(txid)::Text from tx_context where txtimestamp<='2024-08-27 12:13:13.450821'), FALSE);
select uuid, version, identifier, caption from hs_hosting_asset_hv p where identifier in ('hsh00');
select pg_current_xact_id();
-- all versions
select txc.txtimestamp, txc.currentUser, txc.currentTask, haex.*
from hs_hosting_asset_ex haex
join tx_context txc on haex.txid=txc.txid
where haex.identifier in ('lug00', 'mim00');
where haex.identifier in ('hsh00');

12
src/main/resources/db/changelog/0-basis/020-audit-log.sql
View File

@ -26,7 +26,7 @@ create table tx_context
-- FIXME: what whas the purpose of such a hash(task+txid)?
-- contextId bigint primary key not null,
-- txId bigint not null,
txId bigint primary key not null,
txId xid8 primary key not null,
txTimestamp timestamp not null,
currentUser varchar(63) not null, -- not the uuid, because users can be deleted
assumedRoles varchar(1023) not null, -- not the uuids, because roles can be deleted
@ -46,7 +46,7 @@ create index on tx_context using brin (txTimestamp);
create table tx_journal
(
-- contextId bigint not null references tx_context (contextId), -- FIXME: this ...
txId bigint not null references tx_context (txId), -- FIXME: ... or that?
txId xid8 not null references tx_context (txId), -- FIXME: ... or that?
targetTable text not null,
targetUuid uuid not null, -- Assumes that all audited tables have a uuid column.
targetOp operation not null,
@ -81,16 +81,16 @@ create or replace function tx_journal_trigger()
declare
curTask text;
-- curContextId bigint; FIXME: needed?
curTxId bigint;
curTxId xid8;
begin
curTask := currentTask();
-- curContextId := txid_current()+bigIntHash(curTask); FIXME: needed?
curTxId := txid_current();
-- curContextId := pg_current_xact_id()+bigIntHash(curTask); FIXME: needed?
curTxId := pg_current_xact_id();
insert
-- FIXME
-- into tx_context (contextId, txId, txTimestamp, currentUser, assumedRoles, currentTask, currentRequest)
-- values (curContextId, txid_current(), now(),
-- values (curContextId, pg_current_xact_id(), now(),
-- currentUser(), assumedRoles(), curTask, currentRequest())
into tx_context (txId, txTimestamp, currentUser, assumedRoles, currentTask, currentRequest)
values ( curTxId, now(),