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Posted to issues@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2016/06/20 14:41:05 UTC
[jira] [Comment Edited] (HIVE-14021) When converting to CNF, fail
if the expression exceeds a threshold
[ https://issues.apache.org/jira/browse/HIVE-14021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15337352#comment-15337352 ]
Ashutosh Chauhan edited comment on HIVE-14021 at 6/20/16 2:40 PM:
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Can you create a RB?
Also is only difference from Calcite's toCnf() is in terms of overflow exception() ?
was (Author: ashutoshc):
Can you create a RB? Is also diff from Calcite's toCnf() is in terms of overflow exception() ?
> When converting to CNF, fail if the expression exceeds a threshold
> ------------------------------------------------------------------
>
> Key: HIVE-14021
> URL: https://issues.apache.org/jira/browse/HIVE-14021
> Project: Hive
> Issue Type: Improvement
> Components: CBO
> Affects Versions: 2.1.0, 2.2.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Minor
> Attachments: HIVE-14021.patch
>
>
> When converting to conjunctive normal form (CNF), fail if the expression exceeds a threshold. CNF can explode exponentially in the size of the input expression, but rarely does so in practice. Add a maxNodeCount parameter to RexUtil.toCnf and throw or return null if it is exceeded.
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