bugfix: update-behind-insert

sql_insert.cc calls handler->ha_update_row() for
REPLACE and INSERT... ON DUPLICATE KEY UPDATE

mysql-test/suite/vcol/r/update.result

@@ -35,3 +35,11 @@ index(c(100), d(20)));
 insert t1 (a,b,h) values (repeat('g', 10000), repeat('x', 2800), 1);
 update t1 set a = repeat(cast(1 as char), 2000);
 drop table t1;
+create table t1(a blob not null, b int, c varbinary (10) generated always as (a) virtual, unique (c(9)));
+insert t1 (a,b) values ('a', 1);
+replace t1 set a = 'a',b =1;
+insert t1 (a,b) values ('a', 1) on duplicate key update a='b', b=2;
+select * from t1;
+a	b	c
+b	2	b
+drop table t1;

mysql-test/suite/vcol/t/update.test

@@ -46,3 +46,12 @@ create table t1 (
 insert t1 (a,b,h) values (repeat('g', 10000), repeat('x', 2800), 1);
 update t1 set a = repeat(cast(1 as char), 2000);
 drop table t1;
+#
+# UPDATE disguised as INSERT
+#
+create table t1(a blob not null, b int, c varbinary (10) generated always as (a) virtual, unique (c(9)));
+insert t1 (a,b) values ('a', 1);
+replace t1 set a = 'a',b =1;
+insert t1 (a,b) values ('a', 1) on duplicate key update a='b', b=2;
+select * from t1;
+drop table t1;

sql/sql_insert.cc

@@ -1696,6 +1696,12 @@ int write_record(THD *thd, TABLE *table,COPY_INFO *info)
                                                         HA_READ_KEY_EXACT))))
 	  goto err;
       }
+      if (table->vfield)
+      {
+        table->move_fields(table->field, table->record[1], table->record[0]);
+        table->update_virtual_fields(VCOL_UPDATE_INDEXED);
+        table->move_fields(table->field, table->record[0], table->record[1]);
+      }
       if (info->handle_duplicates == DUP_UPDATE)
       {
         int res= 0;