Distributed relation database architecture (DRDA) is the common protocol used for communication between the client and the server, and is provided by the Runtime client.

分布式关系数据库体系结构(distributed relation database architecture, DRDA)是用于客户机与服务器之间通信的常见协议，它由Runtime Client提供。

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The quantile statistics default value is controlled by the num_quantiles database configuration parameter and provides information about how data values are distributed in relation to other values.

分位数统计信息的默认值由 num_quantiles 数据库配置参数控制，该值提供了数据值对于其他值而言是如何分布的有关信息。

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To improve query performance of distributed system, a conjunction data distribution tree is proposed by studying relation between data.

为了提高分布式系统的查询性能，通过研究数据之间的关系，提出一个关联数据分布树。

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