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Re: request for a feature -- LIMIT_ROWS_EXAMINED


On Mon, Mar 12, 2012 at 1:16 PM, Timour Katchaounov
<timour@xxxxxxxxxxxxxxxx> wrote:
> Hello Mark!
> In summary, the feature is ready. It has been reviewed by Monty, and
> tested by Elena via the random query generator. All known bugs have been
> fixed. The implementation turned out to be a lot more tricky than
> initially expected. I hope the result is satisfactory. These are
> the main changes/highlights since our last email exchange:

Thank you.

> - The implementation still allows the query engine to have what I call
>  "momentum". In various cases it is possible that the query engine
>  examines even an order of magnitude more rows than the give row limit.

This is OK for us. We won't be using it in those cases.

> Given that we cannot push this feature into 5.3 (it is GA), an important
> question is whether I should continue maintaining the 5.3 version of the
> feature in addition to the released version in 5.5.

You don't need to maintain the 5.3 version.

Mark Callaghan