Gopal V created HIVE-21781:
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Summary: Vectorization: Incomplete vectorization of "or false"
with CBO off
Key: HIVE-21781
URL: https://issues.apache.org/jira/browse/HIVE-21781
Project: Hive
Issue Type: Bug
Components: Logical Optimizer
Reporter: Gopal V
{code}
create temporary table foo (x int) ;
insert into foo values(1),(2),(3),(4),(5);
set hive.explain.user=false;
explain vectorization detail select count(case when (x=1 or false) then 1 else
0 end ) from foo
{code}
{code}
| Group By Operator |
| aggregations: count(CASE WHEN (((x = 1) or false)) THEN
(1) ELSE (0) END) |
| Group By Vectorization: |
| aggregators:
VectorUDAFCount(IfExprLongScalarLongScalar(col 3:boolean, val 1, val
0)(children: VectorUDFAdaptor(((x = 1) or false))(children:
LongColEqualLongScalar(col 0:int, val 1) -> 2:boolean) -> 3:boolean) -> 4:int)
-> bigint |
| className: VectorGroupByOperator |
{code}
The pass-through Calcite fixes this.
{code}
| OPTIMIZED SQL: SELECT COUNT(CASE WHEN `x` = 1 THEN 1 ELSE 0 END) AS `$f0` |
| FROM `default`.`foo`
{code}
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