VIRTUAL INDEX

PROBLEM

While doing an inplace ALTER TABLE operartion, we rebuild the template
only if there is table rebuild or add/drop virtual column. In ALTER
cases where there is a length extension of a column and such a column
also is present in an index with virtual column leading to offset shift
of virtual column value , there is no rebuilt of template hence leading
to assertion failure in ASAN builds .

FIX

Is to add a check for cases where the alter leads to column length
change and call for a rebuilt of template in such cases too to rectify
the incorrect calculation of offset for virtual columns and the assert
failure.

Reviewed-by: Jimmy Yang <Jimmy.Yang@oracle.com>
Reviewed-by: Thirunarayanan Balathandayuthapani
	     <thirunarayanan.balathandayuth@oracle.com>
RB: 12613