If a query USES a combination of columns that are not indexed, GAE will only throw an exception at run time when the query is executed.

如果查询使用没有进行索引的列的组合，那么当执行查询时，GAE将只在运行时出现一个异常。

youdao

If a query USES a combination of columns that are not indexed, GAE will only throw an exception at run time when the query is executed.

如果查询使用没有进行索引的列的组合，那么当执行查询时，GAE将只在运行时出现一个异常。

youdao