Fixed bug #603186.

There were two problems that caused wrong results reported with this bug.
1. In some cases stored(persistent) virtual columns were not marked
in the write_set and in the vcol_set bitmaps.
2. If the list of fields in an insert command was empty then the values of
the stored virtual columns were set to default.

To fix the first problem the function st_table::mark_virtual_columns_for_write
was modified. Now the function has a parameter that says whether the virtual 
columns are to be marked for insert or for update.  
To fix the second problem a special handling of empty insert lists is
added in the function fill_record().

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

@@ -45,3 +45,20 @@ C
 1
 1
 DROP TABLE t1;
+CREATE TABLE t1(a int, b int DEFAULT 0, v INT AS (b+10) PERSISTENT);
+INSERT INTO t1(a) VALUES (1);
+SELECT b, v FROM t1;
+b	v
+0	10
+DROP TABLE t1;
+CREATE TABLE t1(a int DEFAULT 100, v int AS (a+1) PERSISTENT);
+INSERT INTO t1 () VALUES ();
+CREATE TABLE t2(a int DEFAULT 100 , v int AS (a+1));
+INSERT INTO t2 () VALUES ();
+SELECT a, v FROM t1;
+a	v
+100	101
+SELECT a, v FROM t2;
+a	v
+100	101
+DROP TABLE t1,t2;

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

@@ -43,5 +43,22 @@ SELECT 1 AS C FROM t1 ORDER BY v;
 
 DROP TABLE t1;
 
+#
+# Bug#603186: Insert for a table with stored vurtual columns
+#             
+
+CREATE TABLE t1(a int, b int DEFAULT 0, v INT AS (b+10) PERSISTENT);
+INSERT INTO t1(a) VALUES (1);
+SELECT b, v FROM t1;
+
+DROP TABLE t1;
+
+CREATE TABLE t1(a int DEFAULT 100, v int AS (a+1) PERSISTENT);
+INSERT INTO t1 () VALUES ();
+CREATE TABLE t2(a int DEFAULT 100 , v int AS (a+1));
+INSERT INTO t2 () VALUES ();
 
+SELECT a, v FROM t1;
+SELECT a, v FROM t2;
 
+DROP TABLE t1,t2;

sql/sql_base.cc

@@ -8204,6 +8204,8 @@ fill_record(THD * thd, List<Item> &fields, List<Item> &values,
     table->auto_increment_field_not_null= FALSE;
     f.rewind();
   }
+  else if (thd->lex->unit.insert_table_with_stored_vcol)
+    tbl_list.push_back(thd->lex->unit.insert_table_with_stored_vcol);
   while ((fld= f++))
   {
     if (!(field= fld->filed_for_view_update()))

sql/sql_insert.cc

@@ -273,7 +273,7 @@ static int check_insert_fields(THD *thd, TABLE_LIST *table_list,
   }
   /* Mark virtual columns used in the insert statement */
   if (table->vfield)
-    table->mark_virtual_columns_for_write();
+    table->mark_virtual_columns_for_write(TRUE);
   // For the values we need select_priv
 #ifndef NO_EMBEDDED_ACCESS_CHECKS
   table->grant.want_privilege= (SELECT_ACL & ~table->grant.privilege);
@@ -1267,7 +1267,6 @@ bool mysql_prepare_insert(THD *thd, TABLE_LIST *table_list,
   if (mysql_prepare_insert_check_table(thd, table_list, fields, select_insert))
     DBUG_RETURN(TRUE);
 
-
   /* Prepare the fields in the statement. */
   if (values)
   {
@@ -1320,6 +1319,18 @@ bool mysql_prepare_insert(THD *thd, TABLE_LIST *table_list,
   if (!table)
     table= table_list->table;
 
+  if (!fields.elements && table->vfield)
+  {
+    for (Field **vfield_ptr= table->vfield; *vfield_ptr; vfield_ptr++)
+    {
+      if ((*vfield_ptr)->stored_in_db)
+      {
+        thd->lex->unit.insert_table_with_stored_vcol= table;
+        break;
+      }
+    }
+  }
+
   if (!select_insert)
   {
     Item *fake_conds= 0;

sql/sql_lex.cc

@@ -1590,6 +1590,7 @@ void st_select_lex_unit::init_query()
   item_list.empty();
   describe= 0;
   found_rows_for_union= 0;
+  insert_table_with_stored_vcol= 0;
 }
 
 void st_select_lex::init_query()

sql/sql_lex.h

@@ -532,6 +532,13 @@ public:
   bool describe; /* union exec() called for EXPLAIN */
   Procedure *last_procedure;	 /* Pointer to procedure, if such exists */
 
+  /* 
+    Insert table with stored virtual columns.
+    This is used only in those rare cases 
+    when the list of inserted values is empty.
+  */
+  TABLE *insert_table_with_stored_vcol;
+
   void init_query();
   st_select_lex_unit* master_unit();
   st_select_lex* outer_select();

sql/sql_table.cc

@@ -7876,7 +7876,7 @@ copy_data_between_tables(TABLE *from,TABLE *to,
 
   /* Tell handler that we have values for all columns in the to table */
   to->use_all_columns();
-  to->mark_virtual_columns_for_write();
+  to->mark_virtual_columns_for_write(TRUE);
   init_read_record(&info, thd, from, (SQL_SELECT *) 0, 1, 1, FALSE);
   errpos= 4;
   if (ignore)

sql/table.cc

@@ -5024,7 +5024,7 @@ void st_table::mark_columns_needed_for_update()
     }
   }
   /* Mark all virtual columns needed for update */
-  mark_virtual_columns_for_write();
+  mark_virtual_columns_for_write(FALSE);
   DBUG_VOID_RETURN;
 }
 
@@ -5052,7 +5052,7 @@ void st_table::mark_columns_needed_for_insert()
   if (found_next_number_field)
     mark_auto_increment_column();
   /* Mark virtual columns for insert */
-  mark_virtual_columns_for_write();
+  mark_virtual_columns_for_write(TRUE);
 }
 
 
@@ -5091,9 +5091,13 @@ bool st_table::mark_virtual_col(Field *field)
 /* 
   @brief Mark virtual columns for update/insert commands
     
+  @param insert_fl    <-> virtual columns are marked for insert command 
+
   @details
     The function marks virtual columns used in a update/insert commands
     in the vcol_set bitmap.
+    For an insert command a virtual column is always marked in write_set if
+    it is a stored column.
     If a virtual column is from  write_set it is always marked in vcol_set.
     If a stored virtual column is not from write_set but it is computed
     through columns from write_set it is also marked in vcol_set, and,
@@ -5112,7 +5116,7 @@ bool st_table::mark_virtual_col(Field *field)
     be added to read_set either.           
 */
 
-void st_table::mark_virtual_columns_for_write(void)
+void st_table::mark_virtual_columns_for_write(bool insert_fl)
 {
   Field **vfield_ptr, *tmp_vfield;
   bool bitmap_updated= FALSE;
@@ -5123,6 +5127,9 @@ void st_table::mark_virtual_columns_for_write(void)
     if (bitmap_is_set(write_set, tmp_vfield->field_index))
       bitmap_updated= mark_virtual_col(tmp_vfield);
     else if (tmp_vfield->stored_in_db)
+    {
+      bool mark_fl= insert_fl;
+      if (!mark_fl)
       {
         MY_BITMAP *save_read_set;
         Item *vcol_item= tmp_vfield->vcol_info->expr_item;
@@ -5133,7 +5140,9 @@ void st_table::mark_virtual_columns_for_write(void)
         vcol_item->walk(&Item::register_field_in_read_map, 1, (uchar *) 0);
         read_set= save_read_set;
         bitmap_intersect(&tmp_set, write_set);
-      if (!bitmap_is_clear_all(&tmp_set))
+        mark_fl= !bitmap_is_clear_all(&tmp_set);
+      }
+      if (mark_fl)
       {
         bitmap_set_bit(write_set, tmp_vfield->field_index);
         mark_virtual_col(tmp_vfield);

sql/table.h

@@ -886,7 +886,7 @@ struct st_table {
   void mark_columns_needed_for_delete(void);
   void mark_columns_needed_for_insert(void);
   bool mark_virtual_col(Field *field);
-  void mark_virtual_columns_for_write(void);
+  void mark_virtual_columns_for_write(bool insert_fl);
   inline void column_bitmaps_set(MY_BITMAP *read_set_arg,
                                  MY_BITMAP *write_set_arg)
   {