[Fix-426][metadata]修复clickhouse元数据不显示问题

修复clickhouse获取表ddl报错问题。

dlink-metadata/dlink-metadata-clickhouse/src/main/java/com/dlink/metadata/query/ClickHouseQuery.java

@@ -62,4 +62,9 @@ public class ClickHouseQuery extends AbstractDBQuery {
     public String isNullable() {
         return "NULL";
     }
+    
+    @Override
+    public String createTableName() {
+        return "statement";
+    }
 }