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Posted to issues@hive.apache.org by "Chengxiang Li (JIRA)" <ji...@apache.org> on 2015/04/10 10:17:12 UTC
[jira] [Assigned] (HIVE-10238) Loop optimization for SIMD in
IfExprColumnColumn.txt
[ https://issues.apache.org/jira/browse/HIVE-10238?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chengxiang Li reassigned HIVE-10238:
------------------------------------
Assignee: Chengxiang Li
> Loop optimization for SIMD in IfExprColumnColumn.txt
> ----------------------------------------------------
>
> Key: HIVE-10238
> URL: https://issues.apache.org/jira/browse/HIVE-10238
> Project: Hive
> Issue Type: Sub-task
> Components: Vectorization
> Affects Versions: 1.1.0
> Reporter: Chengxiang Li
> Assignee: Chengxiang Li
> Priority: Minor
>
> The ?: operator as following could not be vectorized in loop, we may transfer it into mathematical expression.
> {code:java}
> for(int j = 0; j != n; j++) {
> int i = sel[j];
> outputVector[i] = (vector1[i] == 1 ? vector2[i] : vector3[i]);
> outputIsNull[i] = (vector1[i] == 1 ?
> arg2ColVector.isNull[i] : arg3ColVector.isNull[i]);
> }
> {code}
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