Cleanup during review

Simple optimization for 2 argument usage to function of variable arguments
Fix stack overrun when using 1+1+1+1+1+1+1+....
Update crash-me results for 5.0
Don't call post_open if pre_open() fails (optimization)

libmysql/libmysql.c

@@ -1738,7 +1738,7 @@ myodbc_remove_escape(MYSQL *mysql,char *name)
 
 /* Default number of rows fetched per one COM_FETCH command. */
 
-#define DEFAULT_PREFETCH_ROWS 1UL
+#define DEFAULT_PREFETCH_ROWS (ulong) 1
 
 /*
   These functions are called by function pointer MYSQL_STMT::read_row_func.

mysql-test/mysql-test-run.sh

@@ -887,7 +887,7 @@ report_stats () {
 
     found_error=0
     # Find errors
-    for i in "^Warning:" "^Error:" "^==.* at 0x"
+    for i in "^Warning:" "^Error:" "^==.* at 0x" "InnoDB: Warning"
     do
       if $GREP "$i" $MY_LOG_DIR/warnings.tmp >> $MY_LOG_DIR/warnings
       then

mysql-test/t/type_newdecimal.test

@@ -911,7 +911,9 @@ DROP TABLE t1;
 # Bug #10465
 #
 
+--disable_warnings
 CREATE TABLE t1 (GRADE DECIMAL(4) NOT NULL, PRIMARY KEY (GRADE)) ENGINE=INNODB;
+--enable_warnings
 INSERT INTO t1 (GRADE) VALUES (151),(252),(343);
 SELECT GRADE  FROM t1 WHERE GRADE > 160 AND GRADE < 300;
 SELECT GRADE  FROM t1 WHERE GRADE= 151;

mysys/my_alloc.c

@@ -39,10 +39,11 @@
   DESCRIPTION
     This function prepares memory root for further use, sets initial size of
     chunk for memory allocation and pre-allocates first block if specified.
-    Altough error can happen during execution of this function if pre_alloc_size
-    is non-0 it won't be reported. Instead it will be reported as error in first
-    alloc_root() on this memory root.
+    Altough error can happen during execution of this function if
+    pre_alloc_size is non-0 it won't be reported. Instead it will be
+    reported as error in first alloc_root() on this memory root.
 */
+
 void init_alloc_root(MEM_ROOT *mem_root, uint block_size,
 		     uint pre_alloc_size __attribute__((unused)))
 {
@@ -71,6 +72,7 @@ void init_alloc_root(MEM_ROOT *mem_root, uint block_size,
   DBUG_VOID_RETURN;
 }
 
+
 /*
   SYNOPSIS
     reset_root_defaults()
@@ -86,7 +88,7 @@ void init_alloc_root(MEM_ROOT *mem_root, uint block_size,
     reuse one of existing blocks as prealloc block, or malloc new one of
     requested size. If no blocks can be reused, all unused blocks are freed
     before allocation.
- */
+*/
 
 void reset_root_defaults(MEM_ROOT *mem_root, uint block_size,
                          uint pre_alloc_size __attribute__((unused)))

mysys/thr_lock.c

@@ -684,8 +684,10 @@ void thr_unlock(THR_LOCK_DATA *data)
     lock->read.last=data->prev;
   else if (lock_type == TL_WRITE_DELAYED && data->cond)
   {
-    /* This only happens in extreme circumstances when a 
-       write delayed lock that is waiting for a lock */
+    /*
+      This only happens in extreme circumstances when a 
+      write delayed lock that is waiting for a lock
+    */
     lock->write_wait.last=data->prev;		/* Put it on wait queue */
   }
   else

sql/item.h

@@ -284,7 +284,9 @@ class Item {
   Item(THD *thd, Item *item);
   virtual ~Item()
   {
+#ifdef EXTRA_DEBUG
     name=0;
+#endif
   }		/*lint -e1509 */
   void set_name(const char *str,uint length, CHARSET_INFO *cs);
   void rename(char *new_name);

sql/item_func.cc

@@ -211,15 +211,16 @@ void Item_func::set_arguments(List<Item> &list)
 {
   allowed_arg_cols= 1;
   arg_count=list.elements;
-  if ((args=(Item**) sql_alloc(sizeof(Item*)*arg_count)))
+  args= tmp_arg;                                // If 2 arguments
+  if (arg_count <= 2 || (args=(Item**) sql_alloc(sizeof(Item*)*arg_count)))
   {
-    uint i=0;
     List_iterator_fast<Item> li(list);
     Item *item;
+    Item **save_args= args;
 
     while ((item=li++))
     {
-      args[i++]= item;
+      *(save_args++)= item;
       with_sum_func|=item->with_sum_func;
     }
   }

sql/mysql_priv.h

@@ -94,7 +94,7 @@ extern CHARSET_INFO *national_charset_info, *table_alias_charset;
 #define MAX_FIELDS_BEFORE_HASH	32
 #define USER_VARS_HASH_SIZE     16
 #define STACK_MIN_SIZE		8192	// Abort if less stack during eval.
-#define STACK_BUFF_ALLOC	64	// For stack overrun checks
+#define STACK_BUFF_ALLOC	256	// For stack overrun checks
 #ifndef MYSQLD_NET_RETRY_COUNT
 #define MYSQLD_NET_RETRY_COUNT  10	// Abort read after this many int.
 #endif

sql/sp_head.cc

@@ -1904,21 +1904,21 @@ sp_instr_copen::execute(THD *thd, uint *nextp)
   else
   {
     sp_lex_keeper *lex_keeper= c->pre_open(thd);
-
-    if (!lex_keeper)
+    if (!lex_keeper)                            // cursor already open or OOM
     {
       res= -1;
       *nextp= m_ip+1;
     }
     else
+    {
       res= lex_keeper->reset_lex_and_exec_core(thd, nextp, FALSE, this);
-
-    c->post_open(thd, (lex_keeper ? TRUE : FALSE));
+      c->post_open(thd, res ? FALSE : TRUE);
+    }
   }
-
   DBUG_RETURN(res);
 }
 
+
 int
 sp_instr_copen::exec_core(THD *thd, uint *nextp)
 {

sql/sp_rcontext.cc

@@ -168,8 +168,22 @@ sp_rcontext::pop_cursors(uint count)
  *
  */
 
-// We have split this in two to make it easy for sp_instr_copen
-// to reuse the sp_instr::exec_stmt() code.
+/*
+  pre_open cursor
+
+  SYNOPSIS
+    pre_open()
+    THD		Thread handler
+
+  NOTES
+    We have to open cursor in two steps to make it easy for sp_instr_copen
+    to reuse the sp_instr::exec_stmt() code.
+    If this function returns 0, post_open should not be called
+
+  RETURN
+   0  ERROR
+*/
+
 sp_lex_keeper*
 sp_cursor::pre_open(THD *thd)
 {
@@ -179,32 +193,31 @@ sp_cursor::pre_open(THD *thd)
                MYF(0));
     return NULL;
   }
-
-  bzero((char *)&m_mem_root, sizeof(m_mem_root));
   init_alloc_root(&m_mem_root, MEM_ROOT_BLOCK_SIZE, MEM_ROOT_PREALLOC);
   if ((m_prot= new Protocol_cursor(thd, &m_mem_root)) == NULL)
     return NULL;
 
-  m_oprot= thd->protocol;	// Save the original protocol
-  thd->protocol= m_prot;
-
+  /* Save for execution. Will be restored in post_open */
+  m_oprot= thd->protocol;
   m_nseof= thd->net.no_send_eof;
+
+  /* Change protocol for execution */
+  thd->protocol= m_prot;
   thd->net.no_send_eof= TRUE;
   return m_lex_keeper;
 }
 
+
 void
 sp_cursor::post_open(THD *thd, my_bool was_opened)
 {
   thd->net.no_send_eof= m_nseof; // Restore the originals
   thd->protocol= m_oprot;
-  if (was_opened)
-  {
-    m_isopen= was_opened;
+  if ((m_isopen= was_opened))
     m_current_row= m_prot->data;
-  }
 }
 
+
 int
 sp_cursor::close(THD *thd)
 {
@@ -217,6 +230,7 @@ sp_cursor::close(THD *thd)
   return 0;
 }
 
+
 void
 sp_cursor::destroy()
 {
@@ -225,7 +239,6 @@ sp_cursor::destroy()
     delete m_prot;
     m_prot= NULL;
     free_root(&m_mem_root, MYF(0));
-    bzero((char *)&m_mem_root, sizeof(m_mem_root));
   }
   m_isopen= FALSE;
 }

sql/sql_parse.cc

@@ -4502,7 +4502,8 @@ mysql_execute_command(THD *thd)
         send_ok(thd);
       break;
     }
-    if (thd->transaction.xa_state == XA_IDLE && thd->lex->xa_opt == XA_ONE_PHASE)
+    if (thd->transaction.xa_state == XA_IDLE &&
+        thd->lex->xa_opt == XA_ONE_PHASE)
     {
       int r;
       if ((r= ha_commit(thd)))
@@ -4510,8 +4511,8 @@ mysql_execute_command(THD *thd)
       else
         send_ok(thd);
     }
-    else
-    if (thd->transaction.xa_state == XA_PREPARED && thd->lex->xa_opt == XA_NONE)
+    else if (thd->transaction.xa_state == XA_PREPARED &&
+             thd->lex->xa_opt == XA_NONE)
     {
       if (wait_if_global_read_lock(thd, 0, 0))
       {

sql/sql_select.cc

@@ -955,32 +955,35 @@ JOIN::optimize()
 #endif
 
   DBUG_EXECUTE("info",TEST_join(this););
-  /*
-    Because filesort always does a full table scan or a quick range scan
-    we must add the removed reference to the select for the table.
-    We only need to do this when we have a simple_order or simple_group
-    as in other cases the join is done before the sort.
-  */
-  if (const_tables != tables &&
-      (order || group_list) &&
-      join_tab[const_tables].type != JT_ALL &&
-      join_tab[const_tables].type != JT_FT &&
-      join_tab[const_tables].type != JT_REF_OR_NULL &&
-      (order && simple_order || group_list && simple_group))
-  {
-    if (add_ref_to_table_cond(thd,&join_tab[const_tables]))
-      DBUG_RETURN(1);
-  }
 
-  if (!(select_options & SELECT_BIG_RESULT) &&
-      ((group_list && const_tables != tables &&
-	(!simple_group ||
-	 !test_if_skip_sort_order(&join_tab[const_tables], group_list,
-				  unit->select_limit_cnt, 0))) ||
-       select_distinct) &&
-      tmp_table_param.quick_group && !procedure)
+  if (const_tables != tables)
   {
-    need_tmp=1; simple_order=simple_group=0;	// Force tmp table without sort
+    /*
+      Because filesort always does a full table scan or a quick range scan
+      we must add the removed reference to the select for the table.
+      We only need to do this when we have a simple_order or simple_group
+      as in other cases the join is done before the sort.
+    */
+    if ((order || group_list) &&
+        join_tab[const_tables].type != JT_ALL &&
+        join_tab[const_tables].type != JT_FT &&
+        join_tab[const_tables].type != JT_REF_OR_NULL &&
+        (order && simple_order || group_list && simple_group))
+    {
+      if (add_ref_to_table_cond(thd,&join_tab[const_tables]))
+        DBUG_RETURN(1);
+    }
+    
+    if (!(select_options & SELECT_BIG_RESULT) &&
+        ((group_list &&
+          (!simple_group ||
+           !test_if_skip_sort_order(&join_tab[const_tables], group_list,
+                                    unit->select_limit_cnt, 0))) ||
+         select_distinct) &&
+        tmp_table_param.quick_group && !procedure)
+    {
+      need_tmp=1; simple_order=simple_group=0;	// Force tmp table without sort
+    }
   }
 
   tmp_having= having;
@@ -5219,7 +5222,10 @@ add_found_match_trig_cond(JOIN_TAB *tab, COND *cond, JOIN_TAB *root_tab)
     tmp= new Item_func_trig_cond(tmp, &tab->found);
   }
   if (tmp)
+  {
     tmp->quick_fix_field();
+    tmp->update_used_tables();
+  }
   return tmp;
 }
 
@@ -5376,6 +5382,8 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
       JOIN_TAB *first_inner_tab= tab->first_inner; 
       table_map current_map= tab->table->map;
       bool use_quick_range=0;
+      COND *tmp;
+
       /*
 	Following force including random expression in last table condition.
 	It solve problem with select like SELECT * FROM t1 WHERE rand() > 0.5
@@ -5397,7 +5405,7 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
 	join->best_positions[i].records_read= rows2double(tab->quick->records);
       }
 
-      COND *tmp= NULL;
+      tmp= NULL;
       if (cond)
         tmp= make_cond_for_table(cond,used_tables,current_map);
       if (cond && !tmp && tab->quick)