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https://issues.apache.org/jira/browse/HIVE-11397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14646785#comment-14646785
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Gunther Hagleitner commented on HIVE-11397:
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[~jcamachorodriguez]/[~hsubramaniyan]/[~mmokhtar] thoughts? This should be a
legal transform and will keep the depth of the tree in check (avoid OO stack
space for recursive algos.
> Parse Hive OR clauses as they are written into the AST
> ------------------------------------------------------
>
> Key: HIVE-11397
> URL: https://issues.apache.org/jira/browse/HIVE-11397
> Project: Hive
> Issue Type: Bug
> Components: Logical Optimizer
> Affects Versions: 1.3.0, 2.0.0
> Reporter: Gopal V
> Assignee: Jesus Camacho Rodriguez
>
> When parsing A OR B OR C, hive converts it into
> (C OR B) OR A
> instead of turning it into
> A OR (B OR C)
> {code}
> GenericUDFOPOr or = new GenericUDFOPOr();
> List<ExprNodeDesc> expressions = new ArrayList<ExprNodeDesc>(2);
> expressions.add(previous);
> expressions.add(current);
> {code}
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