Joe McDonnell has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/22668


Change subject: IMPALA-13901: Make histogram/sample/group_concat ineligible for 
tuple caching
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IMPALA-13901: Make histogram/sample/group_concat ineligible for tuple caching

"histogram" and "sample" rely on the same code as "appx_median"
and incorporate randomness. "group_concat" is entirely dependent
on the order of inputs. This expands tuple caching's list of
ineligible functions to include these variable aggregate functions.

Testing:
 - Added test cases to TupleCacheTest for these functions

Change-Id: Ibb017dd4297a3bb219ffed2bd9abc94e6c5b2605
---
M fe/src/main/java/org/apache/impala/analysis/FunctionCallExpr.java
M fe/src/test/java/org/apache/impala/planner/TupleCacheTest.java
2 files changed, 14 insertions(+), 4 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/68/22668/1
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ibb017dd4297a3bb219ffed2bd9abc94e6c5b2605
Gerrit-Change-Number: 22668
Gerrit-PatchSet: 1
Gerrit-Owner: Joe McDonnell <[email protected]>

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