removing JHipster
This commit is contained in:
Michael Hoennig
166
sql/historization.sql
Normal file
166
sql/historization.sql
Normal file
@@ -0,0 +1,166 @@
|
||||
|
||||
-- ========================================================
|
||||
-- Historization
|
||||
-- --------------------------------------------------------
|
||||
|
||||
CREATE TABLE "tx_history" (
|
||||
"tx_id" BIGINT NOT NULL UNIQUE,
|
||||
"tx_timestamp" TIMESTAMP NOT NULL,
|
||||
"user" VARCHAR(64) NOT NULL, -- references postgres user
|
||||
"task" VARCHAR NOT NULL
|
||||
);
|
||||
|
||||
CREATE TYPE "operation" AS ENUM ('INSERT', 'UPDATE', 'DELETE', 'TRUNCATE');
|
||||
|
||||
-- see https://www.postgresql.org/docs/current/plpgsql-trigger.html
|
||||
|
||||
CREATE OR REPLACE FUNCTION historicize()
|
||||
RETURNS trigger
|
||||
LANGUAGE plpgsql STRICT AS $$
|
||||
DECLARE
|
||||
currentUser VARCHAR(64);
|
||||
currentTask varchar;
|
||||
"row" RECORD;
|
||||
"alive" BOOLEAN;
|
||||
"sql" varchar;
|
||||
BEGIN
|
||||
-- determine user_id
|
||||
BEGIN
|
||||
currentUser := current_setting('hsadminng.currentUser');
|
||||
EXCEPTION WHEN OTHERS THEN
|
||||
currentUser := NULL;
|
||||
END;
|
||||
IF (currentUser IS NULL OR currentUser = '') THEN
|
||||
RAISE EXCEPTION 'hsadminng.currentUser must be defined, please use "SET LOCAL ...;"';
|
||||
END IF;
|
||||
RAISE NOTICE 'currentUser: %', currentUser;
|
||||
|
||||
-- determine task
|
||||
currentTask = current_setting('hsadminng.currentTask');
|
||||
IF (currentTask IS NULL OR length(currentTask) < 12) THEN
|
||||
RAISE EXCEPTION 'hsadminng.currentTask (%) must be defined and min 12 characters long, please use "SET LOCAL ...;"', currentTask;
|
||||
END IF;
|
||||
RAISE NOTICE 'currentTask: %', currentTask;
|
||||
|
||||
IF (TG_OP = 'INSERT') OR (TG_OP = 'UPDATE') THEN
|
||||
"row" := NEW;
|
||||
"alive" := TRUE;
|
||||
ELSE -- DELETE or TRUNCATE
|
||||
"row" := OLD;
|
||||
"alive" := FALSE;
|
||||
END IF;
|
||||
|
||||
sql := format('INSERT INTO tx_history VALUES (txid_current(), now(), %1L, %2L) ON CONFLICT DO NOTHING', currentUser, currentTask);
|
||||
RAISE NOTICE 'sql: %', sql;
|
||||
EXECUTE sql;
|
||||
sql := format('INSERT INTO %3$I_versions VALUES (DEFAULT, txid_current(), %1$L, %2$L, $1.*)', TG_OP, alive, TG_TABLE_NAME);
|
||||
RAISE NOTICE 'sql: %', sql;
|
||||
EXECUTE sql USING "row";
|
||||
|
||||
RETURN "row";
|
||||
END; $$;
|
||||
|
||||
CREATE OR REPLACE PROCEDURE create_historical_view(baseTable varchar)
|
||||
LANGUAGE plpgsql AS $$
|
||||
DECLARE
|
||||
createTriggerSQL varchar;
|
||||
viewName varchar;
|
||||
versionsTable varchar;
|
||||
createViewSQL varchar;
|
||||
baseCols varchar;
|
||||
BEGIN
|
||||
|
||||
viewName = quote_ident(format('%s_hv', baseTable));
|
||||
versionsTable = quote_ident(format('%s_versions', baseTable));
|
||||
baseCols = (SELECT string_agg(quote_ident(column_name), ', ')
|
||||
FROM information_schema.columns
|
||||
WHERE table_schema = 'public' AND table_name = baseTable);
|
||||
|
||||
createViewSQL = format(
|
||||
'CREATE OR REPLACE VIEW %1$s AS' ||
|
||||
'(' ||
|
||||
' SELECT %2$s' ||
|
||||
' FROM %3$s' ||
|
||||
' WHERE alive = TRUE' ||
|
||||
' AND version_id IN' ||
|
||||
' (' ||
|
||||
' SELECT max(vt.version_id) AS history_id' ||
|
||||
' FROM %3$s AS vt' ||
|
||||
' JOIN tx_history as txh ON vt.tx_id = txh.tx_id' ||
|
||||
' WHERE txh.tx_timestamp <= current_setting(''hsadminng.timestamp'')::timestamp' ||
|
||||
' GROUP BY id' ||
|
||||
' )' ||
|
||||
')',
|
||||
viewName, baseCols, versionsTable
|
||||
);
|
||||
RAISE NOTICE 'sql: %', createViewSQL;
|
||||
EXECUTE createViewSQL;
|
||||
|
||||
createTriggerSQL = 'CREATE TRIGGER ' || baseTable || '_historicize' ||
|
||||
' AFTER INSERT OR DELETE OR UPDATE ON ' || baseTable ||
|
||||
' FOR EACH ROW EXECUTE PROCEDURE historicize()';
|
||||
RAISE NOTICE 'sql: %', createTriggerSQL;
|
||||
EXECUTE createTriggerSQL;
|
||||
|
||||
END; $$;
|
||||
|
||||
CREATE OR REPLACE PROCEDURE 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 || '_versions (' ||
|
||||
' version_id serial PRIMARY KEY,' ||
|
||||
' tx_id bigint NOT NULL REFERENCES tx_history(tx_id),' ||
|
||||
' trigger_op operation NOT NULL,' ||
|
||||
' alive boolean not null,' ||
|
||||
|
||||
' 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_versions', 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.timestamp'')::timestamp' ||
|
||||
' GROUP BY id' ||
|
||||
' )' ||
|
||||
')',
|
||||
viewName, baseCols, versionsTable
|
||||
);
|
||||
RAISE NOTICE 'sql: %', createViewSQL;
|
||||
EXECUTE createViewSQL;
|
||||
|
||||
createTriggerSQL = 'CREATE TRIGGER ' || baseTable || '_historicize' ||
|
||||
' AFTER INSERT OR DELETE OR UPDATE ON ' || baseTable ||
|
||||
' FOR EACH ROW EXECUTE PROCEDURE historicize()';
|
||||
RAISE NOTICE 'sql: %', createTriggerSQL;
|
||||
EXECUTE createTriggerSQL;
|
||||
|
||||
END; $$;
|
||||
Reference in New Issue
Block a user