From: Jorgen Loland
Date: May 5 2011 7:06am
Subject: Re: bzr commit into mysql-trunk branch (olav.sandstaa:3368) Bug#12321461
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Olav,

Thank you for the new patch. I have one question before approving.

On 05/04/2011 03:24 PM, Olav Sandstaa wrote:
> @@ -4869,7 +4869,26 @@ int DsMrr_impl::dsmrr_init(handler *h_ar
>       /*
>         We get here when the access alternates betwen MRR scan(s) and non-MRR
>         scans.
> +    */
>
> +    /*
> +      Verify consistency between the two handler objects:
> +      1. The main handler should either use the primary key or not have an
> +         active index at this point since the clone handler (h2) is used for
> +         reading the index.
> +      2. The index used for ICP should be the same for the two handlers or
> +         it should not be set on the clone handler (h2).
> +      3. The ICP function should be the same for the two handlers or it should
> +         not be set for the clone handler (h2).

In which case(s) will h but not h2 have a pushed index after the cloning has 
been done?

-- 
Jørgen Løland | Senior Software Engineer | +47 73842138
Oracle MySQL
Trondheim, Norway