impala

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Srinath Shankar 74a975c45b IMPALA-862: count(x) may return null when a similar count(distinct x) is also used

count(x) with no distinct and no group-by expressions returns NULL on empty input
if other distinct aggs (e.g. COUNT(distinct x) are present.
This happens because the COUNT is transformed to SUM(COUNT()),
with the inner COUNT being evaluated WITH a group-by expression (e.g. x).
SUM over empty input returns NULL, but COUNT should return 0.

This patch fixes this by replacing COUNT with zeroifnull(COUNT) before AggregateInfo
is generated if there are distinct aggs and no group-bys. The logic in AggregateInfo
itself has not been modified.

Change-Id: I902e3fdd95767135b2f3fe423e8802ef57366af1
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1921
Reviewed-by: Srinath Shankar <sshankar@cloudera.com>
Tested-by: jenkins

2014-03-14 23:35:55 -07:00

functional-planner

IMPALA-862: count(x) may return null when a similar count(distinct x) is also used

2014-03-14 23:35:55 -07:00

functional-query

IMPALA-862: count(x) may return null when a similar count(distinct x) is also used

2014-03-14 23:35:55 -07:00

hive-benchmark

Refactor testing framework to generate Avro tables.

2014-01-08 10:48:45 -08:00

targeted-perf

Add targeted perf queries for columns materialized from inline-view

2014-01-08 10:54:17 -08:00

targeted-stress

Fix race when invalidating catalog metadata and loading a new table

2014-01-31 16:16:32 -08:00

tpcds

IMPALA-598: Order by behavior for NULLs should be revisited

2014-01-08 10:53:48 -08:00

tpcds-insert

Add partitioned tpcds insert workload and tests

2014-01-08 10:52:16 -08:00

tpch

IMPALA-692: Fix data corruption with dictionary encoded values.

2014-01-08 10:54:24 -08:00

README

Move functional data loading to new framework + initial changes for workload directory structure

2014-01-08 10:44:18 -08:00

README

This directory contains Impala test workloads. The directory layout for the workloads should follow:

workloads/
   <data set name>/<data set name>_dimensions.csv  <- The test dimension file
   <data set name>/<data set name>_core.csv  <- A test vector file
   <data set name>/<data set name>_pairwise.csv
   <data set name>/<data set name>_exhaustive.csv
   <data set name>/queries/<query test>.test <- The queries for this workload