You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@drill.apache.org by "Jinfeng Ni (JIRA)" <ji...@apache.org> on 2014/06/09 21:33:01 UTC
[jira] [Commented] (DRILL-937) Boolean operators should use
short-circuit evaluation.
[ https://issues.apache.org/jira/browse/DRILL-937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14025610#comment-14025610 ]
Jinfeng Ni commented on DRILL-937:
----------------------------------
The fix is to handle boolean operator differently from other normal function/operator in EvalVisitor. In run-time code generation phase, Drill need generate the code to support short-circuit for boolean operator.
> Boolean operators should use short-circuit evaluation.
> -------------------------------------------------------
>
> Key: DRILL-937
> URL: https://issues.apache.org/jira/browse/DRILL-937
> Project: Apache Drill
> Issue Type: Improvement
> Reporter: Jinfeng Ni
>
> When Drill evaluate a boolean operator ('and', 'or'), it should use the short-circuit evaluation approach : when one branch is sufficient enough to decide the final result, Drill should stop evaluating the other branches. This should help improve the performance of filter operator, when it contains a complex boolean operator.
>
--
This message was sent by Atlassian JIRA
(v6.2#6252)