MCOL-1989 Fix view in view subquery outer join

A view calling a view as part of a subquery outer join was not getting
the view name for the derived table columns. Which caused ColumnStore to
think it was joining outside of the view and triggered a missing column
error.

This fix adds the view name from the subquery if one cannot be obtained
from the field object.

dbcon/mysql/ha_from_sub.cpp

@@ -317,6 +317,7 @@ SCSEP FromSubQuery::transform()
 	gwi.subQuery = this;
 	gwi.viewName = fGwip.viewName;
 	csep->derivedTbAlias(fAlias); // always lower case
+    csep->derivedTbView(fGwip.viewName.alias);
 
 	if (getSelectPlan(gwi, *fFromSub, csep) != 0)
 	{