| set hive.cli.print.header=true; |
| set hive.mapred.mode=nonstrict; |
| set hive.explain.user=false; |
| set hive.vectorized.execution.enabled=true; |
| |
| create table studentnull100( |
| name string, |
| age int, |
| gpa double) |
| row format delimited |
| fields terminated by '\001' |
| stored as textfile; |
| LOAD DATA LOCAL INPATH '../../data/files/studentnull100' OVERWRITE INTO TABLE studentnull100; |
| analyze table studentnull100 compute statistics; |
| |
| explain vectorization detail |
| select age, name, avg(gpa), sum(age) over (partition by name) |
| from studentnull100 |
| group by age, name; |
| |
| select age, name, avg(gpa), sum(age) over (partition by name) |
| from studentnull100 |
| group by age, name; |
| |
| EXPLAIN VECTORIZATION ONLY |
| SELECT ROW_NUMBER() OVER(order by age) AS rn FROM studentnull100; |
| SELECT ROW_NUMBER() OVER(order by age) AS rn FROM studentnull100; |
