89 lines
3.1 KiB
PL/PgSQL
89 lines
3.1 KiB
PL/PgSQL
-- Migration script: add_character_name_to_notification.sql
|
|
-- Fügt character_name und character_id zur falukant_log.notification Tabelle hinzu,
|
|
-- legt Index an, erzeugt die Helper-Funktion und den Trigger.
|
|
-- Idempotent und mit Down-Schritten zum Entfernen.
|
|
|
|
BEGIN;
|
|
|
|
-- 1) Spalten anlegen
|
|
ALTER TABLE IF EXISTS falukant_log.notification
|
|
ADD COLUMN IF NOT EXISTS character_name text;
|
|
|
|
ALTER TABLE IF EXISTS falukant_log.notification
|
|
ADD COLUMN IF NOT EXISTS character_id integer;
|
|
|
|
-- 2) Index (idempotent)
|
|
CREATE INDEX IF NOT EXISTS idx_notification_character_id
|
|
ON falukant_log.notification (character_id);
|
|
|
|
-- 3) Trigger-Funktion anlegen (idempotent)
|
|
CREATE OR REPLACE FUNCTION falukant_log.populate_notification_character_name()
|
|
RETURNS TRIGGER AS $function$
|
|
DECLARE
|
|
v_first_name TEXT;
|
|
v_last_name TEXT;
|
|
v_char_id INTEGER;
|
|
v_column_exists BOOLEAN;
|
|
BEGIN
|
|
-- prüfen, ob Zielspalte existiert
|
|
SELECT EXISTS(
|
|
SELECT 1 FROM information_schema.columns
|
|
WHERE table_schema = 'falukant_log' AND table_name = 'notification' AND column_name = 'character_name'
|
|
) INTO v_column_exists;
|
|
|
|
IF NOT v_column_exists THEN
|
|
RETURN NEW;
|
|
END IF;
|
|
|
|
IF NEW.character_name IS NOT NULL THEN
|
|
RETURN NEW;
|
|
END IF;
|
|
|
|
v_char_id := NEW.character_id;
|
|
|
|
IF v_char_id IS NULL AND NEW.user_id IS NOT NULL THEN
|
|
SELECT id INTO v_char_id
|
|
FROM falukant_data.character
|
|
WHERE user_id = NEW.user_id
|
|
ORDER BY id DESC
|
|
LIMIT 1;
|
|
END IF;
|
|
|
|
IF v_char_id IS NOT NULL THEN
|
|
SELECT pf.name, pl.name
|
|
INTO v_first_name, v_last_name
|
|
FROM falukant_data.character c
|
|
LEFT JOIN falukant_predefine.firstname pf ON pf.id = c.first_name
|
|
LEFT JOIN falukant_predefine.lastname pl ON pl.id = c.last_name
|
|
WHERE c.id = v_char_id;
|
|
|
|
IF v_first_name IS NOT NULL OR v_last_name IS NOT NULL THEN
|
|
NEW.character_name := COALESCE(v_first_name, '') || CASE WHEN v_first_name IS NOT NULL AND v_last_name IS NOT NULL THEN ' ' ELSE '' END || COALESCE(v_last_name, '');
|
|
ELSE
|
|
NEW.character_name := ('#' || v_char_id::text);
|
|
END IF;
|
|
ELSE
|
|
IF NEW.user_id IS NOT NULL THEN
|
|
NEW.character_name := ('#u' || NEW.user_id::text);
|
|
END IF;
|
|
END IF;
|
|
|
|
RETURN NEW;
|
|
END;
|
|
$function$ LANGUAGE plpgsql;
|
|
|
|
-- 4) Trigger anlegen (BEFORE INSERT)
|
|
DROP TRIGGER IF EXISTS trg_populate_notification_character_name ON falukant_log.notification;
|
|
CREATE TRIGGER trg_populate_notification_character_name
|
|
BEFORE INSERT ON falukant_log.notification
|
|
FOR EACH ROW
|
|
EXECUTE FUNCTION falukant_log.populate_notification_character_name();
|
|
|
|
COMMIT;
|
|
|
|
-- Down / Rollback (falls benötigt):
|
|
-- Die folgenden Statements entfernen Trigger, Funktion, Index und Spalten.
|
|
|
|
-- Hinweis: Ausführbar separat; zur Anwendung einfach die folgenden Zeilen verwenden:
|
|
-- BEGIN; DROP TRIGGER IF EXISTS trg_populate_notification_character_name ON falukant_log.notification; DROP FUNCTION IF EXISTS falukant_log.populate_notification_character_name(); DROP INDEX IF EXISTS falukant_log.idx_notification_character_id; ALTER TABLE IF EXISTS falukant_log.notification DROP COLUMN IF EXISTS character_name; ALTER TABLE IF EXISTS falukant_log.notification DROP COLUMN IF EXISTS character_id; COMMIT;
|