[HIVE-2344] filter is removed due to regression of HIVE-1538

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.8.0
• Fix Version/s: 0.8.0
• Hadoop Flags: Reviewed

Release Note

When predicate pushdown is enabled, Hive would previously incorrectly push down predicates on non-deterministic function invocations when those were indirectly referenced via a nested SELECT list rather than directly in the filter expression. After this change, Hive no longer pushes down filters over indirect references to function invocations of any kind (regardless of determinism). Note that in Hive, even builtin operators such as + and CAST are treated as function invocations.

• Assignee: Amareshwari Sriramadasu
• Reporter: He Yongqiang
• Created: 03/Aug/11 21:44
• Updated: 09/Jan/13 10:23
• Resolved: 11/Aug/11 20:08

Description

select * from
(
select type_bucket,randum123
from (SELECT *, cast(rand() as double) AS randum123 FROM tbl where ds = ...) a
where randum123 <=0.1)s where s.randum123>0.1 limit 20;

This is returning results...

and

explain
select type_bucket,randum123
from (SELECT *, cast(rand() as double) AS randum123 FROM tbl where ds = ...) a
where randum123 <=0.1

shows that there is no filter.

Issue Links

• relates to: HIVE-1538 FilterOperator is applied twice with ppd on.