两种情况下不走map-reduce: 1. where ds >' ' //ds 是partition 2. select * from table //后面没有查询条件,什么都没有 1.建表 CREATE TABLE sal( id INT, name STRING, salary INT ) partitioned by (city string) ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t' STORED AS TEXTFILE; 1.1 修
背景:根据业务需要需要把60张主子表批量入库到hive表. 创建测试数据: def createBatchTestFile(): Unit = { to ) { val sWriter = new PrintWriter(new File("D:\\server_" + layer + ".txt")) val nWriter = new PrintWriter(new File("D:\\neighour_" + layer + ".
原文地址:http://www.aboutyun.com/forum.PHP?mod=viewthread&tid=8590&highlight=Hive 问题导读:1.如何查看hive表结构?2.如何查看表结构信息?3.如何查看分区信息?4.哪个命令可以模糊搜索表? 1.hive模糊搜索表 show tables like '*name*'; 2.查看表结构信息 desc formatted table_name; desc table_name; 3.查看分区信息 show p