| --! qt:dataset:src1 |
| --! qt:dataset:src |
| set hive.mapred.mode=nonstrict; |
| set hive.optimize.ppd=true; |
| set hive.ppd.remove.duplicatefilters=false; |
| |
| EXPLAIN |
| SELECT src1.c1, src2.c4 |
| FROM |
| (SELECT src.key as c1, src.value as c2 from src ) src1 |
| JOIN |
| (SELECT src.key as c3, src.value as c4 from src where src.key > '2' ) src2 |
| ON src1.c1 = src2.c3 |
| WHERE rand() > 0.5; |
| |
| set hive.ppd.remove.duplicatefilters=true; |
| |
| EXPLAIN |
| SELECT src1.c1, src2.c4 |
| FROM |
| (SELECT src.key as c1, src.value as c2 from src ) src1 |
| JOIN |
| (SELECT src.key as c3, src.value as c4 from src where src.key > '2' ) src2 |
| ON src1.c1 = src2.c3 |
| WHERE rand() > 0.5; |