Merge 5.2->5.3

mysql-test/r/information_schema2.result

+select variable_name from information_schema.session_status where variable_name =
+(select variable_name from information_schema.session_status where variable_name = 'uptime');
+variable_name
+UPTIME
+select variable_name from information_schema.session_variables where variable_name =
+(select variable_name from information_schema.session_variables where variable_name = 'basedir');
+variable_name
+BASEDIR

mysql-test/r/sum_distinct-big.result

@@ -103,5 +103,20 @@ sm
 10323810
 10325070
 10326330
+# 
+# Bug mdev-4063: SUM(DISTINCT...) with small'max_heap_table_size 
+# (bug #56927)
+# 
+SET max_heap_table_size=default;
+INSERT INTO t1 SELECT id+16384 FROM t1;
+DELETE FROM t2;
+INSERT INTO t2 SELECT id FROM t1 ORDER BY id*rand();
+SELECT SUM(DISTINCT id) sm FROM t2;
+sm
+536887296
+SET max_heap_table_size=16384;
+SELECT SUM(DISTINCT id) sm FROM t2;
+sm
+536887296
 DROP TABLE t1;
 DROP TABLE t2;

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

@@ -182,6 +182,17 @@ a	b	c
 2	3	y
 0	1	y,n
 drop table t1,t2;
+CREATE TABLE t1 (
+ts TIMESTAMP,
+tsv TIMESTAMP AS (ADDDATE(ts, INTERVAL 1 DAY)) VIRTUAL
+) ENGINE=MyISAM;
+INSERT INTO t1 (tsv) VALUES (DEFAULT);
+INSERT DELAYED INTO t1 (tsv) VALUES (DEFAULT);
+FLUSH TABLES;
+SELECT COUNT(*) FROM t1;
+COUNT(*)
+2
+DROP TABLE t1;
 create table t1 (a int, b int);
 insert into t1 values (3, 30), (4, 20), (1, 20);
 create table t2 (c int, d int, v int as (d+1), index idx(c));

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

@@ -178,6 +178,25 @@ select * from t2;
 
 drop table t1,t2;
 
+#
+# Bug mdev-3938: INSERT DELAYED for a table with virtual columns
+#
+
+CREATE TABLE t1 (
+ ts TIMESTAMP,
+ tsv TIMESTAMP AS (ADDDATE(ts, INTERVAL 1 DAY)) VIRTUAL
+) ENGINE=MyISAM;
+
+INSERT INTO t1 (tsv) VALUES (DEFAULT);
+
+INSERT DELAYED INTO t1 (tsv) VALUES (DEFAULT);
+
+FLUSH TABLES;
+
+SELECT COUNT(*) FROM t1;
+
+DROP TABLE t1;
+
 #
 #  SELECT that uses a virtual column and executed with BKA
 #

mysql-test/t/information_schema2.test

+
+#
+# MDEV-4029 SELECT on information_schema using a subquery locks up the information_schema table due to incorrect mutexes handling 
+#
+select variable_name from information_schema.session_status where variable_name =
+(select variable_name from information_schema.session_status where variable_name = 'uptime');
+select variable_name from information_schema.session_variables where variable_name =
+(select variable_name from information_schema.session_variables where variable_name = 'basedir');
+

mysql-test/t/sum_distinct-big.test

@@ -63,5 +63,22 @@ SELECT SUM(DISTINCT id) sm FROM t1;
 SELECT SUM(DISTINCT id) sm FROM t2;
 SELECT SUM(DISTINCT id) sm FROM t1 GROUP BY id % 13;
 
+--echo # 
+--echo # Bug mdev-4063: SUM(DISTINCT...) with small'max_heap_table_size 
+--echo # (bug #56927)
+--echo # 
+
+SET max_heap_table_size=default;
+
+INSERT INTO t1 SELECT id+16384 FROM t1;
+DELETE FROM t2;
+INSERT INTO t2 SELECT id FROM t1 ORDER BY id*rand();
+
+SELECT SUM(DISTINCT id) sm FROM t2;
+
+SET max_heap_table_size=16384;
+
+SELECT SUM(DISTINCT id) sm FROM t2;
+
 DROP TABLE t1;
 DROP TABLE t2;

sql/item_sum.cc

@@ -1120,7 +1120,7 @@ void Item_sum_distinct::calculate_val_and_count()
     if (tree)
     {
       table->field[0]->set_notnull();
-      tree->walk(item_sum_distinct_walk, (void*) this);
+      tree->walk(table, item_sum_distinct_walk, (void*) this);
     }
     is_evaluated= TRUE;
   }
@@ -2621,7 +2621,7 @@ longlong Item_sum_count_distinct::val_int()
     if (tree->elements == 0)
       return (longlong) tree->elements_in_tree(); // everything fits in memory
     count= 0;
-    tree->walk(count_distinct_walk, (void*) &count);
+    tree->walk(table, count_distinct_walk, (void*) &count);
     is_evaluated= TRUE;
     return (longlong) count;
   }

sql/mysql_priv.h

@@ -2472,6 +2472,9 @@ void open_table_error(TABLE_SHARE *share, int error, int db_errno, int errarg);
 int open_table_from_share(THD *thd, TABLE_SHARE *share, const char *alias,
                           uint db_stat, uint prgflag, uint ha_open_flags,
                           TABLE *outparam, bool is_create_table);
+bool unpack_vcol_info_from_frm(THD *thd, MEM_ROOT *mem_root,
+                               TABLE *table, Field *field,
+                               LEX_STRING *vcol_expr, bool *error_reported);
 int readfrm(const char *name, uchar **data, size_t *length);
 int writefrm(const char* name, const uchar* data, size_t len);
 int closefrm(TABLE *table, bool free_share);

sql/sql_base.cc

@@ -8679,7 +8679,8 @@ fill_record(THD * thd, List<Item> &fields, List<Item> &values,
                           ER(ER_WARNING_NON_DEFAULT_VALUE_FOR_VIRTUAL_COLUMN),
                           rfield->field_name, table->s->table_name.str);
     }
-    if ((value->save_in_field(rfield, 0)) < 0 && !ignore_errors)
+    if ((!rfield->vcol_info || rfield->stored_in_db) && 
+        (value->save_in_field(rfield, 0)) < 0 && !ignore_errors)
     {
       my_message(ER_UNKNOWN_ERROR, ER(ER_UNKNOWN_ERROR), MYF(0));
       goto err;

sql/sql_class.h

@@ -3447,6 +3447,8 @@ class Unique :public Sql_alloc
   uint full_size;
   uint min_dupl_count;   /* always 0 for unions, > 0 for intersections */
 
+  bool merge(TABLE *table, uchar *buff, bool without_last_merge);
+
 public:
   ulong elements;
   Unique(qsort_cmp2 comp_func, void *comp_func_fixed_arg,
@@ -3487,7 +3489,7 @@ class Unique :public Sql_alloc
   }
 
   void reset();
-  bool walk(tree_walk_action action, void *walk_action_arg);
+  bool walk(TABLE *table, tree_walk_action action, void *walk_action_arg);
 
   uint get_size() const { return size; }
   ulonglong get_max_in_memory_size() const { return max_in_memory_size; }

sql/sql_insert.cc

@@ -2129,6 +2129,7 @@ TABLE *Delayed_insert::get_local_table(THD* client_thd)
 {
   my_ptrdiff_t adjust_ptrs;
   Field **field,**org_field, *found_next_number_field;
+  Field **vfield;
   TABLE *copy;
   TABLE_SHARE *share;
   uchar *bitmap;
@@ -2172,6 +2173,13 @@ TABLE *Delayed_insert::get_local_table(THD* client_thd)
   if (!copy_tmp)
     goto error;
 
+  if (share->vfields)
+  {
+    vfield= (Field **) client_thd->alloc((share->vfields+1)*sizeof(Field*));
+    if (!vfield)
+      goto error;
+  }
+
   /* Copy the TABLE object. */
   copy= new (copy_tmp) TABLE;
   *copy= *table;
@@ -2201,6 +2209,27 @@ TABLE *Delayed_insert::get_local_table(THD* client_thd)
   }
   *field=0;
 
+  if (share->vfields)
+  {
+    copy->vfield= vfield;
+    for (field= copy->field; *field; field++)
+    {
+      if ((*field)->vcol_info)
+      {
+        bool error_reported= FALSE;
+        if (unpack_vcol_info_from_frm(client_thd,
+                                      client_thd->mem_root,
+                                      copy,
+                                      *field,
+                                      &(*field)->vcol_info->expr_str,
+                                      &error_reported))
+          goto error;
+        *vfield++= *field;
+      }
+    }
+    *vfield= 0; 
+  }
+
   /* Adjust timestamp */
   if (table->timestamp_field)
   {

sql/sql_show.cc

@@ -2654,7 +2654,6 @@ static bool show_status_array(THD *thd, const char *wild,
   int len;
   LEX_STRING null_lex_str;
   SHOW_VAR tmp, *var;
-  COND *partial_cond= 0;
   enum_check_fields save_count_cuted_fields= thd->count_cuted_fields;
   bool res= FALSE;
   CHARSET_INFO *charset= system_charset_info;
@@ -2668,7 +2667,6 @@ static bool show_status_array(THD *thd, const char *wild,
   if (*prefix)
     *prefix_end++= '_';
   len=name_buffer + sizeof(name_buffer) - prefix_end;
-  partial_cond= make_cond_for_info_schema(cond, table->pos_in_table_list);
 
   for (; variables->name; variables++)
   {
@@ -2691,13 +2689,13 @@ static bool show_status_array(THD *thd, const char *wild,
     if (show_type == SHOW_ARRAY)
     {
       show_status_array(thd, wild, (SHOW_VAR *) var->value, value_type,
-                        status_var, name_buffer, table, ucase_names, partial_cond);
+                        status_var, name_buffer, table, ucase_names, cond);
     }
     else
     {
       if (!(wild && wild[0] && wild_case_compare(system_charset_info,
                                                  name_buffer, wild)) &&
-          (!partial_cond || partial_cond->val_int()))
+          (!cond || cond->val_int()))
       {
         char *value=var->value;
         const char *pos, *end;                  // We assign a lot of const's
@@ -6280,9 +6278,12 @@ int fill_variables(THD *thd, TABLE_LIST *tables, COND *cond)
       schema_table_idx == SCH_GLOBAL_VARIABLES)
     option_type= OPT_GLOBAL;
 
+  COND *partial_cond= make_cond_for_info_schema(cond, tables);
+
   rw_rdlock(&LOCK_system_variables_hash);
   res= show_status_array(thd, wild, enumerate_sys_vars(thd, sorted_vars),
-                         option_type, NULL, "", tables->table, upper_case_names, cond);
+                         option_type, NULL, "", tables->table, upper_case_names,
+                         partial_cond);
   rw_unlock(&LOCK_system_variables_hash);
   DBUG_RETURN(res);
 }
@@ -6319,13 +6320,18 @@ int fill_status(THD *thd, TABLE_LIST *tables, COND *cond)
     tmp1= &thd->status_var;
   }
 
+  COND *partial_cond= make_cond_for_info_schema(cond, tables);
+  // Evaluate and cache const subqueries now, before the mutex.
+  if (partial_cond)
+    partial_cond->val_int();
+
   pthread_mutex_lock(&LOCK_status);
   if (option_type == OPT_GLOBAL)
     calc_sum_of_all_status(&tmp);
   res= show_status_array(thd, wild,
                          (SHOW_VAR *)all_status_vars.buffer,
                          option_type, tmp1, "", tables->table,
-                         upper_case_names, cond);
+                         upper_case_names, partial_cond);
   pthread_mutex_unlock(&LOCK_status);
   DBUG_RETURN(res);
 }

sql/table.cc

@@ -1916,8 +1916,10 @@ bool fix_vcol_expr(THD *thd,
   @brief
     Unpack the definition of a virtual column from its linear representation
 
-  @parm
+  @param
     thd                  The thread object
+  @param
+    mem_root             The mem_root object where to allocated memory 
   @param
     table                The table containing the virtual column
   @param
@@ -1947,6 +1949,7 @@ bool fix_vcol_expr(THD *thd,
     TRUE            Otherwise
 */
 bool unpack_vcol_info_from_frm(THD *thd,
+                               MEM_ROOT *mem_root,
                                TABLE *table,
                                Field *field,
                                LEX_STRING *vcol_expr,
@@ -1972,7 +1975,7 @@ bool unpack_vcol_info_from_frm(THD *thd,
     "PARSE_VCOL_EXPR (<expr_string_from_frm>)".
   */
   
-  if (!(vcol_expr_str= (char*) alloc_root(&table->mem_root,
+  if (!(vcol_expr_str= (char*) alloc_root(mem_root,
                                           vcol_expr->length + 
                                             parse_vcol_keyword.length + 3)))
   {
@@ -2006,10 +2009,10 @@ bool unpack_vcol_info_from_frm(THD *thd,
       We need to use CONVENTIONAL_EXECUTION here to ensure that
       any new items created by fix_fields() are not reverted.
     */
-    Query_arena expr_arena(&table->mem_root,
+    Query_arena expr_arena(mem_root,
                            Query_arena::CONVENTIONAL_EXECUTION);
-    if (!(vcol_arena= (Query_arena *) alloc_root(&table->mem_root,
-                                                 sizeof(Query_arena))))
+    if (!(vcol_arena= (Query_arena *) alloc_root(mem_root,
+                                               sizeof(Query_arena))))
       goto err;
     *vcol_arena= expr_arena;
     table->expr_arena= vcol_arena;
@@ -2265,6 +2268,7 @@ int open_table_from_share(THD *thd, TABLE_SHARE *share, const char *alias,
       if ((*field_ptr)->vcol_info)
       {
         if (unpack_vcol_info_from_frm(thd,
+                                      &outparam->mem_root,
                                       outparam,
                                       *field_ptr,
                                       &(*field_ptr)->vcol_info->expr_str,

sql/uniques.cc

@@ -580,6 +580,7 @@ static bool merge_walk(uchar *merge_buffer, ulong merge_buffer_size,
   SYNOPSIS
     Unique:walk()
   All params are 'IN':
+    table   parameter for the call of the merge method
     action  function-visitor, typed in include/my_tree.h
             function is called for each unique element
     arg     argument for visitor, which is passed to it on each call
@@ -588,70 +589,68 @@ static bool merge_walk(uchar *merge_buffer, ulong merge_buffer_size,
     <> 0 error
  */
 
-bool Unique::walk(tree_walk_action action, void *walk_action_arg)
+bool Unique::walk(TABLE *table, tree_walk_action action, void *walk_action_arg)
 {
-  int res;
+  int res= 0;
   uchar *merge_buffer;
 
   if (elements == 0)                       /* the whole tree is in memory */
     return tree_walk(&tree, action, walk_action_arg, left_root_right);
 
+  table->sort.found_records=elements+tree.elements_in_tree;
   /* flush current tree to the file to have some memory for merge buffer */
   if (flush())
     return 1;
   if (flush_io_cache(&file) || reinit_io_cache(&file, READ_CACHE, 0L, 0, 0))
     return 1;
-  if (!(merge_buffer= (uchar *) my_malloc((ulong) max_in_memory_size, MYF(0))))
+  ulong buff_sz= (max_in_memory_size / full_size + 1) * full_size;
+  if (!(merge_buffer= (uchar *) my_malloc((ulong) buff_sz, MYF(0))))
     return 1;
-  res= merge_walk(merge_buffer, (ulong) max_in_memory_size, size,
-                  (BUFFPEK *) file_ptrs.buffer,
-                  (BUFFPEK *) file_ptrs.buffer + file_ptrs.elements,
-                  action, walk_action_arg,
-                  tree.compare, tree.custom_arg, &file);
+  if (buff_sz < (ulong) (full_size * (file_ptrs.elements + 1)))
+    res= merge(table, merge_buffer, buff_sz >= full_size * MERGEBUFF2) ;
+  
+  if (!res)
+  {  
+    res= merge_walk(merge_buffer, (ulong) max_in_memory_size, full_size,
+                    (BUFFPEK *) file_ptrs.buffer,
+                    (BUFFPEK *) file_ptrs.buffer + file_ptrs.elements,
+                    action, walk_action_arg,
+                    tree.compare, tree.custom_arg, &file);
+  }
   my_free((char*) merge_buffer, MYF(0));
   return res;
 }
 
+
 /*
-  Modify the TABLE element so that when one calls init_records()
-  the rows will be read in priority order.
-*/
+  DESCRIPTION
+    Perform multi-pass sort merge of the elements accessed through table->sort,
+    using the buffer buff as the merge buffer. The last pass is not performed
+    if without_last_merge is TRUE.
+  SYNOPSIS
+    Unique:merge()
+  All params are 'IN':
+    table               the parameter to access sort context
+    buff                merge buffer
+    without_last_merge  TRUE <=> do not perform the last merge
+  RETURN VALUE
+    0    OK
+    <> 0 error
+ */
 
-bool Unique::get(TABLE *table)
+bool Unique::merge(TABLE *table, uchar *buff, bool without_last_merge)
 {
   SORTPARAM sort_param;
-  table->sort.found_records=elements+tree.elements_in_tree;
-  if (my_b_tell(&file) == 0)
-  {
-    /* Whole tree is in memory;  Don't use disk if you don't need to */
-    if ((record_pointers=table->sort.record_pointers= (uchar*)
-	 my_malloc(size * tree.elements_in_tree, MYF(0))))
-    {
-      tree_walk_action action= min_dupl_count ?
-		         (tree_walk_action) unique_intersect_write_to_ptrs :
-		         (tree_walk_action) unique_write_to_ptrs;
-      filtered_out_elems= 0;
-      (void) tree_walk(&tree, action,
-		       this, left_root_right);
-      table->sort.found_records-= filtered_out_elems;
-      return 0;
-    }
-  }
-  /* Not enough memory; Save the result to file && free memory used by tree */
-  if (flush())
-    return 1;
-
-  IO_CACHE *outfile=table->sort.io_cache;
+  IO_CACHE *outfile= table->sort.io_cache;
   BUFFPEK *file_ptr= (BUFFPEK*) file_ptrs.buffer;
   uint maxbuffer= file_ptrs.elements - 1;
-  uchar *sort_buffer;
   my_off_t save_pos;
-  bool error=1;
-
-      /* Open cached file if it isn't open */
-  outfile=table->sort.io_cache=(IO_CACHE*) my_malloc(sizeof(IO_CACHE),
-                                MYF(MY_ZEROFILL));
+  bool error= 1;
 
+  /* Open cached file if it isn't open */
+  if (!outfile)
+    outfile= table->sort.io_cache= (IO_CACHE*) my_malloc(sizeof(IO_CACHE),
+                                                         MYF(MY_ZEROFILL));
   if (!outfile ||
       (! my_b_inited(outfile) &&
        open_cached_file(outfile,mysql_tmpdir,TEMP_PREFIX,READ_RECORD_BUFFER,
@@ -661,47 +660,89 @@ bool Unique::get(TABLE *table)
 
   bzero((char*) &sort_param,sizeof(sort_param));
   sort_param.max_rows= elements;
-  sort_param.sort_form=table;
+  sort_param.sort_form= table;
   sort_param.rec_length= sort_param.sort_length= sort_param.ref_length=
    full_size;
   sort_param.min_dupl_count= min_dupl_count;
   sort_param.res_length= 0;
   sort_param.keys= (uint) (max_in_memory_size / sort_param.sort_length);
-  sort_param.not_killable=1;
+  sort_param.not_killable= 1;
 
-  if (!(sort_buffer=(uchar*) my_malloc((sort_param.keys+1) *
-				       sort_param.sort_length,
-				       MYF(0))))
-    return 1;
-  sort_param.unique_buff= sort_buffer+(sort_param.keys*
-				       sort_param.sort_length);
+  sort_param.unique_buff= buff + (sort_param.keys * sort_param.sort_length);
 
   sort_param.compare= (qsort2_cmp) buffpek_compare;
   sort_param.cmp_context.key_compare= tree.compare;
   sort_param.cmp_context.key_compare_arg= tree.custom_arg;
 
   /* Merge the buffers to one file, removing duplicates */
-  if (merge_many_buff(&sort_param,sort_buffer,file_ptr,&maxbuffer,&file))
+  if (merge_many_buff(&sort_param,buff,file_ptr,&maxbuffer,&file))
     goto err;
   if (flush_io_cache(&file) ||
       reinit_io_cache(&file,READ_CACHE,0L,0,0))
     goto err;
   sort_param.res_length= sort_param.rec_length-
                          (min_dupl_count ? sizeof(min_dupl_count) : 0);
-  if (merge_index(&sort_param, sort_buffer, file_ptr, maxbuffer, &file, outfile))
+  if (without_last_merge)
+  {
+    file_ptrs.elements= maxbuffer+1;
+    return 0;
+  }
+  if (merge_index(&sort_param, buff, file_ptr, maxbuffer, &file, outfile))
     goto err;
-  error=0;
+  error= 0;
 err:
-  x_free(sort_buffer);
   if (flush_io_cache(outfile))
-    error=1;
+    error= 1;
 
   /* Setup io_cache for reading */
-  save_pos=outfile->pos_in_file;
+  save_pos= outfile->pos_in_file;
   if (reinit_io_cache(outfile,READ_CACHE,0L,0,0))
-    error=1;
+    error= 1;
   outfile->end_of_file=save_pos;
   return error;
 }
 
 
+/*
+  Modify the TABLE element so that when one calls init_records()
+  the rows will be read in priority order.
+*/
+
+bool Unique::get(TABLE *table)
+{
+  bool rc= 1;
+  uchar *sort_buffer= NULL;
+  table->sort.found_records= elements+tree.elements_in_tree;
+
+  if (my_b_tell(&file) == 0)
+  {
+    /* Whole tree is in memory;  Don't use disk if you don't need to */
+    if ((record_pointers=table->sort.record_pointers= (uchar*)
+	 my_malloc(size * tree.elements_in_tree, MYF(0))))
+    {
+      tree_walk_action action= min_dupl_count ?
+		         (tree_walk_action) unique_intersect_write_to_ptrs :
+		         (tree_walk_action) unique_write_to_ptrs;
+      filtered_out_elems= 0;
+      (void) tree_walk(&tree, action,
+		       this, left_root_right);
+      table->sort.found_records-= filtered_out_elems;
+      return 0;
+    }
+  }
+  /* Not enough memory; Save the result to file && free memory used by tree */
+  if (flush())
+    return 1;
+  
+  ulong buff_sz= (max_in_memory_size / full_size + 1) * full_size;
+  if (!(sort_buffer= (uchar*) my_malloc(buff_sz, MYF(0))))
+    return 1;
+
+  if (merge(table, sort_buffer, FALSE))
+    goto err;  
+  rc= 0;  
+
+err:  
+  x_free(sort_buffer);  
+  return rc;
+}