On Wed, Nov 10, 2010 at 6:05 PM, Yeb Havinga
<yebhavinga@gmail.com> wrote:
On 2010-11-10 15:46, Alexander Korotkov wrote:
On Wed, Nov 10, 2010 at 5:37 PM, Yeb Havinga
<yebhavinga@gmail.com> wrote:
They are necessary and it is code untouched by this patch, and the same line occurs in other picksplit functions as well. The gbt_num_picksplit function shows that it can be avoided, by rewriting in the second loop
*left++ = sortItems[i].index;
into
v->spl_left[v->spl_nleft] = sortItems[i].index
Even though this is longer code, I prefer this variant over the shorter one.
I can't understand this point. How the way of spl_left and spl_right arrays filling is related with additional FirstOffsetNumber value at the end of array, which is added by "*left = *right = FirstOffsetNumber;" line?
You're right, they are not related. I'm no longer sure it is necessary, looking at gistUserPicksplit.
Teodor, Oleg, probably, you can help us. Is "*left = *right = FirstOffsetNumber;" line necessary in picksplit function or doing something useful?
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With best regards,
Alexander Korotkov.