halentest

摘要： 执行语句hive> explain select s.id, s.name from student s left outer join student_tmp st on s.name = st.name;结果，红色字体为我添加的注释hive> explain select s.id, s.name from student s left outer join student_tmp st on s.name = st.name; OKABSTRACT SYNTAX TREE: (TOK_QUERY (TOK_FROM (TOK_LEFTOU... 阅读全文