Hive

架構 Hive Driver 1.解釋 - 分析query 2.編譯 3.優化 4. 執行器 要與metastore進行通訊 – explode select a, explode(b) as bb from tbl; – lateral view select a, b from tbl lateral view expode(splict(b)) as b; 解決數據傾斜 1. set hiv

>>阅读原文<<