Igor Babaev f78b870c9b Fixed bug #607566. ...

For queries with order by clauses that employed filesort usage of
virtual column references in select lists could trigger assertion
failures. It happened because a wrong vcol_set bitmap was used for
filesort. It turned out that filesort required its own vcol_set bitmap.

Made management of the vcol_set bitmaps similar to the management
of the read_set and write_set bitmaps.

2010-07-19 22:41:24 -07:00

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