Function add_virtual_expression

sql/sql_lex.cc:587–595

Virtual_column_info *add_virtual_expression(THD *thd, Item *expr)
{
  Virtual_column_info *v= new (thd->mem_root) Virtual_column_info();
  if (unlikely(!v))
     return 0;
   v->expr= expr;
   v->utf8= 0;  /* connection charset */
   return v;
}