update

modules/empikmarketplace/src/Utils/DbUtils.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Empik\Marketplace\Utils;
+
+class DbUtils
+{
+    public static function safeAddColumn($table, $column, $def)
+    {
+        if (!self::columnExists($table, $column))
+            return \Db::getInstance()->execute('ALTER TABLE `' . _DB_PREFIX_ . $table . '` ADD `' . $column . '` ' . $def);
+
+        return true;
+    }
+
+    public static function columnExists($table, $column)
+    {
+        $query = 'SELECT COUNT(*) 
+              FROM information_schema.COLUMNS 
+              WHERE TABLE_SCHEMA = DATABASE() 
+              AND COLUMN_NAME = \'' . pSQL($column) . '\' 
+              AND TABLE_NAME = \'' . _DB_PREFIX_ . pSQL($table) . '\'';
+
+        return (bool)\Db::getInstance()->getValue($query);
+    }
+
+    public static function safeDropColumn($table, $column)
+    {
+        if (self::columnExists($table, $column)) {
+            \Db::getInstance()->execute('ALTER TABLE `' . _DB_PREFIX_ . $table . '` DROP `' . $column . '` ');
+        }
+
+        return true;
+    }
+}