[jira] [Commented] (HIVE-11397) Parse Hive OR clauses as they are written into the AST

[Jesus Camacho Rodriguez (JIRA)]

    [ 
https://issues.apache.org/jira/browse/HIVE-11397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14647491#comment-14647491
 ] 

Jesus Camacho Rodriguez commented on HIVE-11397:
------------------------------------------------

[~hagleitn], this looks good to me, we are just transforming the left deep tree 
into a right deep tree; the transformation is legal.

> 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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