igor@olga.mysql.com b210e5df6d Fixed bug#35844. ...

The function test_if_skip_sort_order ignored any covering index used for ref
access of a table in a query with ORDER BY if this index was incompatible 
with the ORDER BY list and there was another covering index compatible with
this list. 
As a result sub-optimal execution plans were chosen for some queries with
ORDER BY clause.

2008-04-22 21:49:39 -07:00

63 KiB

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