[jira] [Closed] (IMPALA-5313) Allow query hints to be submitted via SET

["Greg Rahn (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-5313?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Greg Rahn closed IMPALA-5313.
-----------------------------
    Resolution: Won't Do

While this may seem like a useful way to work around a specific issue, this request has many challenges with it as Alex mentioned.  Query hints have context and scope and this implementation makes scope impossible to reason about.  Given all of these challenges, closing as won't do.

> Allow query hints to be submitted via SET
> -----------------------------------------
>
>                 Key: IMPALA-5313
>                 URL: https://issues.apache.org/jira/browse/IMPALA-5313
>             Project: IMPALA
>          Issue Type: New Feature
>          Components: Frontend
>            Reporter: Balazs Jeszenszky
>              Labels: newbie
>
> It is often not feasible/inconvenient to alter the query text to include hints. In particular, this is painful when trying to work around suboptimal join ordering using BI tools. Being able to issue:
> SET STRAIGHT_JOIN=1;
> (or similar)
> would be a good way to work around this. 



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