Georgi Kodinov a4683e30ae Bug #48665: sql-bench's insert test fails due to wrong result ...

When merging ranges during calculation of the result of OR
to two range sets the current range may be obsoleted by the 
resulting merged range.
The first overlapping range can be obsoleted as well.

Fixed by moving the pointer to the first overlapping range to the
pointer of the resulting union range.
Added few comments at key places in key_or().

2009-11-19 18:26:19 +02:00

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