| set hive.stats.autogather=true; |
| set hive.explain.user=true; |
| |
| dfs ${system:test.dfs.mkdir} ${system:test.tmp.dir}/testdeci2; |
| |
| create table testdeci2_n0( |
| id int, |
| amount decimal(10,3), |
| sales_tax decimal(10,3), |
| item string) |
| stored as orc location '${system:test.tmp.dir}/testdeci2'; |
| |
| insert into table testdeci2_n0 values(1,12.123,12345.123,'desk1'),(2,123.123,1234.123,'desk2'); |
| |
| describe formatted testdeci2_n0; |
| |
| dfs -rmr ${system:test.tmp.dir}/testdeci2/000000_0; |
| |
| describe formatted testdeci2_n0 amount; |
| |
| analyze table testdeci2_n0 compute statistics for columns; |
| |
| describe formatted testdeci2_n0; |
| |
| set hive.stats.fetch.column.stats=true; |
| |
| analyze table testdeci2_n0 compute statistics for columns; |
| |
| explain |
| select s.id, |
| coalesce(d.amount,0) as sales, |
| coalesce(d.sales_tax,0) as tax |
| from testdeci2_n0 s join testdeci2_n0 d |
| on s.item=d.item and d.id=2; |
