remove historization-ng.sql

This commit is contained in:
Michael Hoennig 2024-08-27 09:57:34 +02:00
parent ac33f99222
commit 8a32143d91
2 changed files with 2 additions and 174 deletions

View File

@ -1,174 +0,0 @@
-- ========================================================
-- Historization
-- --------------------------------------------------------
drop PROCEDURE if exists tx_create_historical_view;
drop procedure if exists tx_create_historicization;
drop view if exists hs_hosting_asset_hv;
drop table if exists hs_hosting_asset_ex;
drop trigger if exists hs_hosting_asset_historicize_tg on hs_hosting_asset;
drop procedure if exists tx_historicize_tf;
drop type "tx_operation";
CREATE TYPE "tx_operation" AS ENUM ('INSERT', 'UPDATE', 'DELETE');
CREATE OR REPLACE FUNCTION tx_historicize_tf()
RETURNS trigger
LANGUAGE plpgsql STRICT AS $$
DECLARE
currentTask VARCHAR(127);
curContextId bigint;
"row" RECORD;
"alive" BOOLEAN;
"sql" varchar;
BEGIN
-- determine task
currentTask = current_setting('hsadminng.currentTask');
assert currentTask IS NOT NULL AND length(currentTask) >= 12,
format('hsadminng.currentTask (%s) must be defined and min 12 characters long, please use "SET LOCAL ...;"', currentTask);
assert length(currentTask) <= 127,
format('hsadminng.currentTask (%s) must not be longer than 127 characters"', currentTask);
IF (TG_OP = 'INSERT') OR (TG_OP = 'UPDATE') THEN
"row" := NEW;
"alive" := TRUE;
ELSE -- DELETE or TRUNCATE
"row" := OLD;
"alive" := FALSE;
END IF;
curContextId := txid_current()+bigIntHash(currentTask);
sql := format('INSERT INTO %3$I_ex ' ||
' VALUES (DEFAULT, curContextId, %1$L, %2$L, $1.*)', TG_OP, alive, TG_TABLE_NAME);
RAISE NOTICE 'sql: %', sql;
EXECUTE sql USING "row";
RETURN "row";
END; $$;
-- ------
CREATE OR REPLACE PROCEDURE tx_create_historical_view(baseTable varchar)
LANGUAGE plpgsql AS $$
DECLARE
createTriggerSQL varchar;
viewName varchar;
versionsTable varchar;
createViewSQL varchar;
baseCols varchar;
BEGIN
viewName = quote_ident(format('%s_hv', baseTable));
versionsTable = quote_ident(format('%s_ex', baseTable));
baseCols = (SELECT string_agg(quote_ident(column_name), ', ')
FROM information_schema.columns
WHERE table_schema = 'public' AND table_name = baseTable);
createViewSQL = format(
'CREATE OR REPLACE VIEW %1$s AS' ||
'(' ||
' SELECT %2$s' ||
' FROM %3$s' ||
' WHERE alive = TRUE' ||
' AND version_id IN' ||
' (' ||
' SELECT max(vt.version_id) AS history_id' ||
' FROM %3$s AS vt' ||
' JOIN tx_history as txh ON vt.tx_id = txh.tx_id' ||
' WHERE txh.tx_timestamp <= current_setting(''hsadminng.historical_timestamp'')::timestamp' ||
' GROUP BY id' ||
' )' ||
')',
viewName, baseCols, versionsTable
);
RAISE NOTICE 'sql: %', createViewSQL;
EXECUTE createViewSQL;
createTriggerSQL = 'CREATE TRIGGER ' || baseTable || '_historicize_tg' ||
' AFTER INSERT OR DELETE OR UPDATE ON ' || baseTable ||
' FOR EACH ROW EXECUTE PROCEDURE tx_historicize_tf()';
RAISE NOTICE 'sql: %', createTriggerSQL;
EXECUTE createTriggerSQL;
END; $$;
-- ------
CREATE OR REPLACE PROCEDURE tx_create_historicization(baseTable varchar)
LANGUAGE plpgsql AS $$
DECLARE
createHistTableSql varchar;
createTriggerSQL varchar;
viewName varchar;
versionsTable varchar;
createViewSQL varchar;
baseCols varchar;
BEGIN
-- create the history table
createHistTableSql = '' ||
'CREATE TABLE ' || baseTable || '_ex (' ||
' version_id serial PRIMARY KEY,' ||
' context_id bigint NOT NULL REFERENCES tx_context(contextid),' ||
' trigger_op tx_operation NOT NULL,' ||
' alive boolean not null,' ||
-- followed by all columns of the original table
' LIKE ' || baseTable ||
' EXCLUDING CONSTRAINTS' ||
' EXCLUDING STATISTICS' ||
')';
RAISE NOTICE 'sql: %', createHistTableSql;
EXECUTE createHistTableSql;
-- create the historical view
viewName = quote_ident(format('%s_hv', baseTable));
versionsTable = quote_ident(format('%s_ex', baseTable));
baseCols = (SELECT string_agg(quote_ident(column_name), ', ')
FROM information_schema.columns
WHERE table_schema = 'public' AND table_name = baseTable);
createViewSQL = format(
'CREATE OR REPLACE VIEW %1$s AS' ||
'(' ||
' SELECT %2$s' ||
' FROM %3$s' ||
' WHERE alive = TRUE' ||
' AND version_id IN' ||
' (' ||
' SELECT max(vt.version_id) AS history_id' ||
' FROM %3$s AS vt' ||
' JOIN tx_context as txc ON vt.context_id = txc.contextid' ||
' WHERE txc.txtimestamp <= current_setting(''hsadminng.historical_timestamp'')::timestamp' ||
' GROUP BY context_id' ||
' )' ||
')',
viewName, baseCols, versionsTable
);
RAISE NOTICE 'sql: %', createViewSQL;
EXECUTE createViewSQL;
createTriggerSQL = 'CREATE TRIGGER ' || baseTable || '_historicize_tg' ||
' AFTER INSERT OR DELETE OR UPDATE ON ' || baseTable ||
' FOR EACH ROW EXECUTE PROCEDURE tx_historicize_tf()';
RAISE NOTICE 'sql: %', createTriggerSQL;
EXECUTE createTriggerSQL;
END; $$;
call tx_create_historicization('hs_hosting_asset');
ROLLBACK;
BEGIN TRANSACTION;
call defineContext('historization testing', null, 'superuser-alex@hostsharing.net',
'hs_booking_project#D-1000000-hshdefaultproject:ADMIN');
-- 'hs_booking_project#D-1000300-mihdefaultproject:ADMIN');
update hs_hosting_asset set caption='lug00 a' where identifier='lug00' and type='MANAGED_WEBSPACE';
COMMIT;
SET hsadminng.historical_timestamp TO '2022-07-12 11:38:27.723315';
SELECT * FROM hs_hosting_asset_ex p WHERE identifier = 'lug00';

View File

@ -11,6 +11,8 @@ drop type if exists tx_operation;
-- Historization
-- --------------------------------------------------------
-- FIXME: Liquibase-integration
create type "tx_operation" as enum ('INSERT', 'UPDATE', 'DELETE', 'TRUNCATE');
create or replace function tx_historicize_tf()