first step

core/update_tickets.sql

@@ -0,0 +1,38 @@
+-- Обновление таблицы tickets для добавления полей закрытия
+USE botyobshik;
+
+-- Проверяем и добавляем колонку closed_by
+SET @dbname = DATABASE();
+SET @tablename = 'tickets';
+SET @columnname = 'closed_by';
+SET @preparedStatement = (SELECT IF(
+  (
+    SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
+    WHERE
+      (table_name = @tablename)
+      AND (table_schema = @dbname)
+      AND (column_name = @columnname)
+  ) > 0,
+  'SELECT 1',
+  CONCAT('ALTER TABLE ', @tablename, ' ADD COLUMN ', @columnname, ' VARCHAR(255) AFTER admin_response')
+));
+PREPARE alterIfNotExists FROM @preparedStatement;
+EXECUTE alterIfNotExists;
+DEALLOCATE PREPARE alterIfNotExists;
+
+-- Проверяем и добавляем колонку closed_at
+SET @columnname = 'closed_at';
+SET @preparedStatement = (SELECT IF(
+  (
+    SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
+    WHERE
+      (table_name = @tablename)
+      AND (table_schema = @dbname)
+      AND (column_name = @columnname)
+  ) > 0,
+  'SELECT 1',
+  CONCAT('ALTER TABLE ', @tablename, ' ADD COLUMN ', @columnname, ' DATETIME AFTER closed_by')
+));
+PREPARE alterIfNotExists FROM @preparedStatement;
+EXECUTE alterIfNotExists;
+DEALLOCATE PREPARE alterIfNotExists;