Hive

架构 Hive Driver 1.解释 - 分析query 2.编译 3.优化 4. 执行器 要与metastore进行通讯 – explode select a, explode(b) as bb from tbl; – lateral view select a, b from tbl lateral view expode(splict(b)) as b; 解决数据倾斜 1. set hiv

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