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Merge BUG#36639 into 5.1

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This commit is contained in:
Sergey Petrunia
2008-08-25 21:18:22 +04:00
parent 47f3a9acfb 6677947a95
commit 4e857b42ad
2 changed files with 8 additions and 8 deletions
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7
sql/opt_range.cc
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@ -8564,6 +8564,13 @@ QUICK_SELECT_DESC::QUICK_SELECT_DESC(QUICK_RANGE_SELECT *q,
used_key_parts (used_key_parts_arg)
{
QUICK_RANGE *r;
/*
Use default MRR implementation for reverse scans. No table engine
currently can do an MRR scan with output in reverse index order.
*/
multi_range_length= 0;
multi_range= NULL;
multi_range_buff= NULL;
QUICK_RANGE **pr= (QUICK_RANGE**)ranges.buffer;
QUICK_RANGE **end_range= pr + ranges.elements;