diff --git a/composer.json b/composer.json
index e207e16..83108c3 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
   "name" : "windwork/db",
   "description" : "windwork db component.Windwork MySQL数据库访问组件",
-  "version" : "0.3.2",
+  "version" : "0.3.3",
   "require" : {
     "php" : ">=5.5.0"
   },
diff --git a/lib/ADB.php b/lib/ADB.php
index 65fed43..626461d 100644
--- a/lib/ADB.php
+++ b/lib/ADB.php
@@ -78,7 +78,7 @@ public function getTableSchema($table)
         static $tableSchemaList = array();
         
         if((!$tableSchemaList || empty($tableSchemaList[$table]))) {
-            $rows = $this->getAll("SHOW COLUMNS FROM {$table}");
+            $rows = $this->getAll("SHOW COLUMNS FROM %t", [$table]);
             $tableSchema = array(
                 'pk'      => '', 
                 'ai'      => false,