You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2016/06/15 18:40:09 UTC

[jira] [Created] (HIVE-14021) When converting to CNF, fail if the expression exceeds a threshold

Jesus Camacho Rodriguez created HIVE-14021:
----------------------------------------------

             Summary: 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: Bug
          Components: CBO
    Affects Versions: 2.1.0, 2.2.0
            Reporter: Jesus Camacho Rodriguez
            Assignee: Jesus Camacho Rodriguez


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.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)