historic-view #92
@ -1,9 +1,9 @@
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rollback;
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drop table if exists hs_hosting_asset_versions;
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drop table if exists hs_hosting_asset_ex;
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drop view if exists hs_hosting_asset_hv;
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drop table if exists hs_hosting_asset_ex;
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drop procedure if exists tx_create_historicization;
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drop view if exists tx_create_historical_view;
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drop trigger if exists hs_hosting_asset_tx_historicize_tg on hs_hosting_asset;
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drop function if exists tx_historicize_tf();
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drop type if exists tx_operation;
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@ -54,59 +54,13 @@ begin
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"alive" := false;
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end if;
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sql := format('INSERT INTO %3$I_ex VALUES (DEFAULT, txid_current(), %1$L, %2$L, $1.*)', TG_OP, alive, TG_TABLE_NAME);
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sql := format('INSERT INTO %3$I_ex VALUES (DEFAULT, pg_current_xact_id(), %1$L, %2$L, $1.*)', TG_OP, alive, TG_TABLE_NAME);
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raise notice 'sql: %', sql;
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execute sql using "row";
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return "row";
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end; $$;
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create or replace procedure tx_create_historical_view(baseTable varchar)
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language plpgsql as $$
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declare
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createTriggerSQL varchar;
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viewName varchar;
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exVersionsTable varchar;
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createViewSQL varchar;
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baseCols varchar;
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begin
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viewName = quote_ident(format('%s_hv', baseTable));
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exVersionsTable = quote_ident(format('%s_ex', baseTable));
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baseCols = (select string_agg(quote_ident(column_name), ', ')
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from information_schema.columns
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where table_schema = 'public'
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and table_name = baseTable);
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createViewSQL = format(
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'CREATE OR REPLACE VIEW %1$s AS' ||
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'(' ||
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' SELECT %2$s' ||
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' FROM %3$s' ||
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' WHERE alive = TRUE' ||
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' AND version_id IN' ||
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' (' ||
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' SELECT max(ex.version_id) AS history_id' ||
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' FROM %3$s AS ex' ||
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' JOIN tx_context as txc ON ex.txid = txc.txid' ||
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' WHERE txc.txtimestamp <= current_setting(''hsadminng.tx_history_timestamp'')::timestamp' ||
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' OR txc.txid = current_setting(''hsadminng.tx_history_txid'')' ||
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' GROUP BY uuid' ||
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' )' ||
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')',
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viewName, baseCols, exVersionsTable
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);
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raise notice 'sql: %', createViewSQL;
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execute createViewSQL;
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createTriggerSQL = 'CREATE TRIGGER ' || baseTable || '_tx_historicize_tf' ||
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' AFTER INSERT OR DELETE OR UPDATE ON ' || baseTable ||
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' FOR EACH ROW EXECUTE PROCEDURE tx_historicize_tf()';
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raise notice 'sql: %', createTriggerSQL;
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execute createTriggerSQL;
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end; $$;
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create or replace procedure tx_create_historicization(baseTable varchar)
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language plpgsql as $$
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declare
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@ -122,7 +76,7 @@ begin
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createHistTableSql = '' ||
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'CREATE TABLE ' || baseTable || '_ex (' ||
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' version_id serial PRIMARY KEY,' ||
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' txid bigint NOT NULL REFERENCES tx_context(txid),' ||
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' txid xid8 NOT NULL REFERENCES tx_context(txid),' ||
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' trigger_op tx_operation NOT NULL,' ||
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' alive boolean not null,' ||
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' LIKE ' || baseTable ||
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@ -151,7 +105,7 @@ begin
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' SELECT max(ex.version_id) AS history_id' ||
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' FROM %3$s AS ex' ||
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' JOIN tx_context as txc ON ex.txid = txc.txid' ||
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' WHERE txc.txtimestamp <= current_setting(''hsadminng.tx_history_timestamp'')::timestamp' ||
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' WHERE txc.txid = current_setting(''hsadminng.tx_history_txid'', true)::xid8' ||
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' GROUP BY uuid' ||
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' )' ||
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')',
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@ -160,7 +114,7 @@ begin
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raise notice 'sql: %', createViewSQL;
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execute createViewSQL;
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createTriggerSQL = 'CREATE TRIGGER ' || baseTable || '_tx_historicize_tf' ||
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createTriggerSQL = 'CREATE TRIGGER ' || baseTable || '_tx_historicize_tg' ||
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' AFTER INSERT OR DELETE OR UPDATE ON ' || baseTable ||
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' FOR EACH ROW EXECUTE PROCEDURE tx_historicize_tf()';
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raise notice 'sql: %', createTriggerSQL;
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@ -170,12 +124,13 @@ end; $$;
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--- ==================================================
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call tx_create_historicization('hs_hosting_asset');
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call tx_create_historicization('hs_hosting_asset'); -- FIXME: move to 7010-hosting-asset.sql
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-- and expanded:
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-- ===========================================================================================
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rollback;
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begin transaction;
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call defineContext('historization testing', null, 'superuser-alex@hostsharing.net',
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@ -183,17 +138,19 @@ call defineContext('historization testing', null, 'superuser-alex@hostsharing.ne
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-- 'hs_booking_project#D-1000300-mihdefaultproject:ADMIN'); -- prod
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-- 'hs_booking_project#D-1000300-mimdefaultproject:ADMIN'); -- test
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-- update hs_hosting_asset set caption='lug00 b' where identifier = 'lug00' and type = 'MANAGED_WEBSPACE'; -- prod
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update hs_hosting_asset set caption='mim00 A ' || now()::text where identifier = 'mim00' and type = 'MANAGED_WEBSPACE'; -- test
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update hs_hosting_asset set caption='mim00 B ' || now()::text where identifier = 'mim00' and type = 'MANAGED_WEBSPACE'; -- test
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update hs_hosting_asset set caption='hsh00 E ' || now()::text where identifier = 'hsh00' and type = 'MANAGED_WEBSPACE'; -- test
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update hs_hosting_asset set caption='hsh00 F ' || now()::text where identifier = 'hsh00' and type = 'MANAGED_WEBSPACE'; -- test
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commit;
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-- single version at point in time
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-- set hsadminng.tx_history_timestamp to '2024-08-27 07:44:03'; -- UTC
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set hsadminng.tx_history_timestamp to '2024-08-27 07:44:03'; -- UTC
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select uuid, version, identifier, caption from hs_hosting_asset_hv p where identifier in ('lug00', 'mim00');
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-- set hsadminng.tx_history_txid to (select max(txid) from tx_context where txtimestamp<='2024-08-27 12:13:13.450821');
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SELECT set_config('hsadminng.tx_history_txid', (select max(txid)::Text from tx_context where txtimestamp<='2024-08-27 12:13:13.450821'), FALSE);
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select uuid, version, identifier, caption from hs_hosting_asset_hv p where identifier in ('hsh00');
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select pg_current_xact_id();
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-- all versions
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select txc.txtimestamp, txc.currentUser, txc.currentTask, haex.*
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from hs_hosting_asset_ex haex
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join tx_context txc on haex.txid=txc.txid
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where haex.identifier in ('lug00', 'mim00');
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where haex.identifier in ('hsh00');
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@ -26,7 +26,7 @@ create table tx_context
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-- FIXME: what whas the purpose of such a hash(task+txid)?
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-- contextId bigint primary key not null,
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-- txId bigint not null,
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txId bigint primary key not null,
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txId xid8 primary key not null,
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txTimestamp timestamp not null,
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currentUser varchar(63) not null, -- not the uuid, because users can be deleted
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assumedRoles varchar(1023) not null, -- not the uuids, because roles can be deleted
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@ -46,7 +46,7 @@ create index on tx_context using brin (txTimestamp);
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create table tx_journal
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(
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-- contextId bigint not null references tx_context (contextId), -- FIXME: this ...
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txId bigint not null references tx_context (txId), -- FIXME: ... or that?
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txId xid8 not null references tx_context (txId), -- FIXME: ... or that?
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targetTable text not null,
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targetUuid uuid not null, -- Assumes that all audited tables have a uuid column.
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targetOp operation not null,
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@ -81,16 +81,16 @@ create or replace function tx_journal_trigger()
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declare
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curTask text;
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-- curContextId bigint; FIXME: needed?
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curTxId bigint;
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curTxId xid8;
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begin
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curTask := currentTask();
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-- curContextId := txid_current()+bigIntHash(curTask); FIXME: needed?
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curTxId := txid_current();
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-- curContextId := pg_current_xact_id()+bigIntHash(curTask); FIXME: needed?
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curTxId := pg_current_xact_id();
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insert
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-- FIXME
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-- into tx_context (contextId, txId, txTimestamp, currentUser, assumedRoles, currentTask, currentRequest)
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-- values (curContextId, txid_current(), now(),
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-- values (curContextId, pg_current_xact_id(), now(),
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-- currentUser(), assumedRoles(), curTask, currentRequest())
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into tx_context (txId, txTimestamp, currentUser, assumedRoles, currentTask, currentRequest)
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values ( curTxId, now(),
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|
Loading…
Reference in New Issue
Block a user