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Posted to commits@doris.apache.org by GitBox <gi...@apache.org> on 2022/04/12 10:14:59 UTC

[GitHub] [incubator-doris] EmmyMiao87 commented on issue #7901: [Feature] [Vectorized] Some Join opt in vec exec engine

EmmyMiao87 commented on issue #7901:
URL: https://github.com/apache/incubator-doris/issues/7901#issuecomment-1096506312

   # 关于 Outer join 导致的列属性从非 null 变更到 nullable 的问题
   
   1. 临时禁止：为了 1.0.1 版本的稳定发布，现决定当遇到这种 case 下先退回非向量化引擎执行功能。
   2. 短期实现：利用变更分布式执行计划，来增加 join 的tuple 从而解决非null 变更到 nullable 的问题
   3. 长期实现：通过新优化器，彻底给 join 生成一个新的output tuple，彻底解决问题。


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