Merge with 4.0.12

Docs/internals.texi

@@ -2798,11 +2798,11 @@ Storage: same as TINYINT.
 @strong{DATE}
 @itemize @bullet
 @item
-Storage: fixed-length series of binary integers, always three bytes
-long.
+Storage: 3 byte integer, low byte first.
+Packed as: 'day + month*32 + year*16*32'
 @item
-Example: a DATE column containing '0001-01-01' looks like:@*
-@code{hexadecimal 21 02 00}
+Example: a DATE column containing '1962-01-02' looks like:@*
+@code{hexadecimal 22 54 0F}
 @end itemize
 
 @strong{DATETIME}
@@ -2821,16 +2821,19 @@ Example: a DATETIME column for '0001-01-01 01:01:01' looks like:@*
 @strong{TIME}
 @itemize @bullet
 @item
-Storage: a value offset from 8385959, always three bytes long.
+Storage: 3 bytes, low byte first.
+This is stored as seconds:  days*24*3600+hours*3600+minutes*60+seconds
 @item
-Example: a TIME column containing '01:01:01' looks like:@*
-@code{hexadecimal 75 27 00}
+Example: a TIME column containing '1 02:03:04' (1 day 2 hour 3 minutes and 4 seconds) looks like:@*
+@code{hexadecimal 58 6E 01}
 @end itemize
 
 @strong{TIMESTAMP}
 @itemize @bullet
 @item
-Storage: four bytes long (NOTE TO SELF: not figured out)
+Storage: 4 bytes, low byte first.
+Stored as unix @code{time()}, which is seconds since the Epoch
+(00:00:00 UTC, January 1, 1970).
 @item
 Example: a TIMESTAMP column containing '2003-01-01 01:01:01' looks like:@*
 @code{hexadecimal 4D AE 12 23}

client/mysql.cc

@@ -40,7 +40,7 @@
 #include <signal.h>
 #include <violite.h>
 
-const char *VER= "13.4";
+const char *VER= "13.5";
 
 /* Don't try to make a nice table if the data is too big */
 #define MAX_COLUMN_LENGTH	     1024
@@ -799,6 +799,7 @@ static int get_options(int argc, char **argv)
   }
   if (argc == 1)
   {
+    skip_updates= 0;
     my_free(current_db, MYF(MY_ALLOW_ZERO_PTR));
     current_db= my_strdup(*argv, MYF(MY_WME));
   }

client/password.c

-/* Copyright (C) 2000 MySQL AB
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
-
-/* password checking routines */
-/*****************************************************************************
-  The main idea is that no password are sent between client & server on
-  connection and that no password are saved in mysql in a decodable form.
-
-  On connection a random string is generated and sent to the client.
-  The client generates a new string with a random generator inited with
-  the hash values from the password and the sent string.
-  This 'check' string is sent to the server where it is compared with
-  a string generated from the stored hash_value of the password and the
-  random string.
-
-  The password is saved (in user.password) by using the PASSWORD() function in
-  mysql.
-
-  Example:
-    update user set password=PASSWORD("hello") where user="test"
-  This saves a hashed number as a string in the password field.
-*****************************************************************************/
-
-#include <my_global.h>
-#include <my_sys.h>
-#include <m_string.h>
-#include "mysql.h"
-
-
-void randominit(struct rand_struct *rand_st,ulong seed1, ulong seed2)
-{						/* For mysql 3.21.# */
-#ifdef HAVE_purify
-  bzero((char*) rand_st,sizeof(*rand_st));		/* Avoid UMC varnings */
-#endif
-  rand_st->max_value= 0x3FFFFFFFL;
-  rand_st->max_value_dbl=(double) rand_st->max_value;
-  rand_st->seed1=seed1%rand_st->max_value ;
-  rand_st->seed2=seed2%rand_st->max_value;
-}
-
-static void old_randominit(struct rand_struct *rand_st,ulong seed1)
-{						/* For mysql 3.20.# */
-  rand_st->max_value= 0x01FFFFFFL;
-  rand_st->max_value_dbl=(double) rand_st->max_value;
-  seed1%=rand_st->max_value;
-  rand_st->seed1=seed1 ; rand_st->seed2=seed1/2;
-}
-
-double rnd(struct rand_struct *rand_st)
-{
-  rand_st->seed1=(rand_st->seed1*3+rand_st->seed2) % rand_st->max_value;
-  rand_st->seed2=(rand_st->seed1+rand_st->seed2+33) % rand_st->max_value;
-  return (((double) rand_st->seed1)/rand_st->max_value_dbl);
-}
-
-void hash_password(ulong *result, const char *password)
-{
-  register ulong nr=1345345333L, add=7, nr2=0x12345671L;
-  ulong tmp;
-  for (; *password ; password++)
-  {
-    if (*password == ' ' || *password == '\t')
-      continue;			/* skipp space in password */
-    tmp= (ulong) (uchar) *password;
-    nr^= (((nr & 63)+add)*tmp)+ (nr << 8);
-    nr2+=(nr2 << 8) ^ nr;
-    add+=tmp;
-  }
-  result[0]=nr & (((ulong) 1L << 31) -1L); /* Don't use sign bit (str2int) */;
-  result[1]=nr2 & (((ulong) 1L << 31) -1L);
-  return;
-}
-
-void make_scrambled_password(char *to,const char *password)
-{
-  ulong hash_res[2];
-  hash_password(hash_res,password);
-  sprintf(to,"%08lx%08lx",hash_res[0],hash_res[1]);
-}
-
-static inline uint char_val(char X)
-{
-  return (uint) (X >= '0' && X <= '9' ? X-'0' :
-		 X >= 'A' && X <= 'Z' ? X-'A'+10 :
-		 X-'a'+10);
-}
-
-/*
-** This code assumes that len(password) is divideable with 8 and that
-** res is big enough (2 in mysql)
-*/
-
-void get_salt_from_password(ulong *res,const char *password)
-{
-  res[0]=res[1]=0;
-  if (password)
-  {
-    while (*password)
-    {
-      ulong val=0;
-      uint i;
-      for (i=0 ; i < 8 ; i++)
-	val=(val << 4)+char_val(*password++);
-      *res++=val;
-    }
-  }
-  return;
-}
-
-void make_password_from_salt(char *to, ulong *hash_res)
-{
-  sprintf(to,"%08lx%08lx",hash_res[0],hash_res[1]);
-}
-
-
-/*
- * Genererate a new message based on message and password
- * The same thing is done in client and server and the results are checked.
- */
-
-char *scramble(char *to,const char *message,const char *password,
-	       my_bool old_ver)
-{
-  struct rand_struct rand_st;
-  ulong hash_pass[2],hash_message[2];
-  if (password && password[0])
-  {
-    char *to_start=to;
-    hash_password(hash_pass,password);
-    hash_password(hash_message,message);
-    if (old_ver)
-      old_randominit(&rand_st,hash_pass[0] ^ hash_message[0]);
-    else
-      randominit(&rand_st,hash_pass[0] ^ hash_message[0],
-		 hash_pass[1] ^ hash_message[1]);
-    while (*message++)
-      *to++= (char) (floor(rnd(&rand_st)*31)+64);
-    if (!old_ver)
-    {						/* Make it harder to break */
-      char extra=(char) (floor(rnd(&rand_st)*31));
-      while (to_start != to)
-	*(to_start++)^=extra;
-    }
-  }
-  *to=0;
-  return to;
-}
-
-
-my_bool check_scramble(const char *scrambled, const char *message,
-		       ulong *hash_pass, my_bool old_ver)
-{
-  struct rand_struct rand_st;
-  ulong hash_message[2];
-  char buff[16],*to,extra;			/* Big enough for check */
-  const char *pos;
-
-  hash_password(hash_message,message);
-  if (old_ver)
-    old_randominit(&rand_st,hash_pass[0] ^ hash_message[0]);
-  else
-    randominit(&rand_st,hash_pass[0] ^ hash_message[0],
-	       hash_pass[1] ^ hash_message[1]);
-  to=buff;
-  for (pos=scrambled ; *pos ; pos++)
-    *to++=(char) (floor(rnd(&rand_st)*31)+64);
-  if (old_ver)
-    extra=0;
-  else
-    extra=(char) (floor(rnd(&rand_st)*31));
-  to=buff;
-  while (*scrambled)
-  {
-    if (*scrambled++ != (char) (*to++ ^ extra))
-      return 1;					/* Wrong password */
-  }
-  return 0;
-}

include/Makefile.am

@@ -16,7 +16,7 @@
 # MA 02111-1307, USA
 
 BUILT_SOURCES =		mysql_version.h m_ctype.h my_config.h
-pkginclude_HEADERS =	dbug.h m_string.h my_sys.h my_list.h my_xml.h \
+pkginclude_HEADERS =	my_dbug.h m_string.h my_sys.h my_list.h my_xml.h \
 			mysql.h mysql_com.h mysqld_error.h mysql_embed.h \
 		  	my_semaphore.h my_pthread.h my_no_pthread.h raid.h \
 			errmsg.h my_global.h my_net.h my_alloc.h \

include/my_global.h

@@ -417,7 +417,7 @@ typedef unsigned short ushort;
 #define DBUG_OFF
 #endif
 
-#include <dbug.h>
+#include <my_dbug.h>
 
 #define MIN_ARRAY_SIZE	0	/* Zero or One. Gcc allows zero*/
 #define ASCII_BITS_USED 8	/* Bit char used */

include/mysql_com.h

@@ -298,7 +298,7 @@ extern unsigned long net_buffer_length;
 
 void randominit(struct rand_struct *,unsigned long seed1,
 		unsigned long seed2);
-double rnd(struct rand_struct *);
+double my_rnd(struct rand_struct *);
 void make_scrambled_password(char *to,const char *password,
      my_bool force_old_scramble,struct rand_struct *rand_st);
 int get_password_length(my_bool force_old_scramble);

innobase/row/row0mysql.c

@@ -6,7 +6,7 @@ Contains also create table and other data dictionary operations.
 
 Created 9/17/2000 Heikki Tuuri
 *******************************************************/
-
+  
 #include "row0mysql.h"
 
 #ifdef UNIV_NONINL

libmysql/Makefile.am

@@ -48,10 +48,6 @@ link_sources:
 	    rm -f $(srcdir)/$$f; \
 	    @LN_CP_F@ $(srcdir)/../strings/$$f $(srcdir)/$$f; \
 	  done; \
-	  for f in $$qs; do \
-	    rm -f $(srcdir)/$$f; \
-	    @LN_CP_F@ $(srcdir)/../sql/$$f $(srcdir)/$$f; \
-	  done; \
 	  for f in $$ds; do \
 	    rm -f $(srcdir)/$$f; \
 	    @LN_CP_F@ $(srcdir)/../dbug/$$f $(srcdir)/$$f; \
@@ -61,7 +57,9 @@ link_sources:
 	    @LN_CP_F@ $(srcdir)/../mysys/$$f $(srcdir)/$$f; \
 	  done; \
 	  rm -f $(srcdir)/net.c; \
-	  @LN_CP_F@ $(srcdir)/../sql/net_serv.cc $(srcdir)/net.c
+	  @LN_CP_F@ $(srcdir)/../sql/net_serv.cc $(srcdir)/net.c ; \
+	  rm -f $(srcdir)/password.c; \
+	  @LN_CP_F@ $(srcdir)/../sql/password.c $(srcdir)/password.c
 
 # This part requires GNUmake
 #

libmysql/get_password.c

@@ -23,7 +23,6 @@
 #include "mysql.h"
 #include <m_string.h>
 #include <m_ctype.h>
-#include <dbug.h>
 
 #if defined(HAVE_BROKEN_GETPASS) && !defined(HAVE_GETPASSPHRASE)
 #undef HAVE_GETPASS

libmysqld/Makefile.am

@@ -32,14 +32,14 @@ noinst_LIBRARIES =	libmysqld_int.a
 pkglib_LIBRARIES =	libmysqld.a
 SUBDIRS =		. examples
 libmysqld_sources=	libmysqld.c lib_sql.cc
-libmysqlsources =	errmsg.c get_password.c password.c
+libmysqlsources =	errmsg.c get_password.c
 
 noinst_HEADERS =	embedded_priv.h
 
 sqlsources = convert.cc derror.cc field.cc field_conv.cc filesort.cc \
 	ha_innodb.cc ha_berkeley.cc ha_heap.cc ha_isam.cc ha_isammrg.cc \
 	ha_myisam.cc ha_myisammrg.cc handler.cc sql_handler.cc \
-	hostname.cc init.cc \
+	hostname.cc init.cc password.c \
 	item.cc item_buff.cc item_cmpfunc.cc item_create.cc \
 	item_func.cc item_strfunc.cc item_sum.cc item_timefunc.cc \
 	item_uniq.cc item_subselect.cc item_row.cc\

libmysqld/lib_vio.c

@@ -33,7 +33,6 @@
 #include <violite.h>
 #include <my_net.h>
 #include <m_string.h>
-#include <dbug.h>
 #include <assert.h>
 
 #ifndef __WIN__

mysql-test/r/create.result

@@ -253,3 +253,26 @@ Incorrect table name 'a/a'
 drop table t1, t2, t3;
 drop table t3;
 drop database test_$1;
+SET SESSION table_type="heap";
+SELECT @@table_type;
+@@table_type
+HEAP
+CREATE TABLE t1 (a int not null);
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL default '0'
+) TYPE=HEAP
+drop table t1;
+SET SESSION table_type="gemini";
+SELECT @@table_type;
+@@table_type
+GEMINI
+CREATE TABLE t1 (a int not null);
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL default '0'
+) TYPE=MyISAM
+SET SESSION table_type=default;
+drop table t1;

mysql-test/r/heap.result

@@ -23,7 +23,7 @@ a	b
 4	6
 alter table t1 add c int not null, add key (c,a);
 drop table t1;
-create table t1 (a int not null,b int not null, primary key (a)) type=heap comment="testing heaps";
+create table t1 (a int not null,b int not null, primary key (a)) type=memory comment="testing heaps";
 insert into t1 values(1,1),(2,2),(3,3),(4,4);
 delete from t1 where a > 0;
 select * from t1;

mysql-test/r/innodb.result

-drop table if exists t1,t2;
+drop table if exists t1,t2,t3;
 create table t1 (id int unsigned not null auto_increment, code tinyint unsigned not null, name char(20) not null, primary key (id), key (code), unique (name)) type=innodb;
 insert into t1 (code, name) values (1, 'Tim'), (1, 'Monty'), (2, 'David'), (2, 'Erik'), (3, 'Sasha'), (3, 'Jeremy'), (4, 'Matt');
 select id, code, name from t1 order by id;
@@ -1093,3 +1093,113 @@ SELECT * from t1;
 id
 3
 DROP TABLE t1,t2;
+set autocommit=0;
+CREATE TABLE t1 (id CHAR(15) NOT NULL, value CHAR(40) NOT NULL, PRIMARY KEY(id)) TYPE=InnoDB;
+CREATE TABLE t2 (id CHAR(15) NOT NULL, value CHAR(40) NOT NULL, PRIMARY KEY(id)) TYPE=InnoDB;
+CREATE TABLE t3 (id1 CHAR(15) NOT NULL, id2 CHAR(15) NOT NULL, PRIMARY KEY(id1, id2)) TYPE=InnoDB;
+INSERT INTO t3 VALUES("my-test-1", "my-test-2");
+COMMIT;
+INSERT INTO t1 VALUES("this-key", "will disappear");
+INSERT INTO t2 VALUES("this-key", "will also disappear");
+DELETE FROM t3 WHERE id1="my-test-1";
+SELECT * FROM t1;
+id	value
+this-key	will disappear
+SELECT * FROM t2;
+id	value
+this-key	will also disappear
+SELECT * FROM t3;
+id1	id2
+ROLLBACK;
+SELECT * FROM t1;
+id	value
+SELECT * FROM t2;
+id	value
+SELECT * FROM t3;
+id1	id2
+my-test-1	my-test-2
+SELECT * FROM t3 WHERE id1="my-test-1" LOCK IN SHARE MODE;
+id1	id2
+my-test-1	my-test-2
+COMMIT;
+set autocommit=1;
+DROP TABLE t1,t2,t3;
+CREATE TABLE t1 (a int not null primary key, b int not null, unique (b)) type=innodb;
+INSERT INTO t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+UPDATE t1 set a=a+100 where b between 2 and 3 and a < 1000;
+SELECT * from t1;
+a	b
+1	1
+102	2
+103	3
+4	4
+5	5
+6	6
+7	7
+8	8
+9	9
+drop table t1;
+CREATE TABLE t1 (a int not null primary key, b int not null, key (b)) type=innodb;
+CREATE TABLE t2 (a int not null primary key, b int not null, key (b)) type=innodb;
+INSERT INTO t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+INSERT INTO t2 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+update t1,t2 set t1.a=t1.a+100;
+select * from t1;
+a	b
+101	1
+102	2
+103	3
+104	4
+105	5
+106	6
+107	7
+108	8
+109	9
+update t1,t2 set t1.a=t1.a+100 where t1.a=101;
+select * from t1;
+a	b
+201	1
+102	2
+103	3
+104	4
+105	5
+106	6
+107	7
+108	8
+109	9
+update t1,t2 set t1.b=t1.b+10 where t1.b=2;
+select * from t1;
+a	b
+201	1
+103	3
+104	4
+105	5
+106	6
+107	7
+108	8
+109	9
+102	12
+update t1,t2 set t1.b=t1.b+2,t2.b=t1.b where t1.b between 3 and 5;
+select * from t1;
+a	b
+201	1
+103	5
+104	6
+106	6
+105	7
+107	7
+108	8
+109	9
+102	12
+select * from t2;
+a	b
+1	5
+2	5
+3	5
+4	5
+5	5
+6	5
+7	5
+8	5
+9	5
+drop table t1,t2;

mysql-test/r/multi_update.result

@@ -260,3 +260,67 @@ INSERT INTO t3 VALUES (1,'jedan'),(2,'dva');
 update t1,t2 set t1.naziv="aaaa" where t1.broj=t2.broj;
 update t1,t2,t3 set t1.naziv="bbbb", t2.naziv="aaaa" where t1.broj=t2.broj and t2.broj=t3.broj;
 drop table t1,t2,t3;
+CREATE TABLE t1 (a int not null primary key, b int not null, key (b));
+CREATE TABLE t2 (a int not null primary key, b int not null, key (b));
+INSERT INTO t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+INSERT INTO t2 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+update t1,t2 set t1.a=t1.a+100;
+select * from t1;
+a	b
+101	1
+102	2
+103	3
+104	4
+105	5
+106	6
+107	7
+108	8
+109	9
+update t1,t2 set t1.a=t1.a+100 where t1.a=101;
+select * from t1;
+a	b
+201	1
+102	2
+103	3
+104	4
+105	5
+106	6
+107	7
+108	8
+109	9
+update t1,t2 set t1.b=t1.b+10 where t1.b=2;
+select * from t1;
+a	b
+201	1
+102	12
+103	3
+104	4
+105	5
+106	6
+107	7
+108	8
+109	9
+update t1,t2 set t1.b=t1.b+2,t2.b=t1.b where t1.b between 3 and 5;
+select * from t1;
+a	b
+201	1
+102	12
+103	5
+104	6
+105	7
+106	6
+107	7
+108	8
+109	9
+select * from t2;
+a	b
+1	3
+2	3
+3	3
+4	3
+5	3
+6	3
+7	3
+8	3
+9	3
+drop table t1,t2;

mysql-test/r/rpl_relayspace.result

+slave stop;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+reset master;
+reset slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+slave start;
+stop slave;
+create table t1 (a int);
+reset slave;
+start slave;
+select master_pos_wait('master-bin.001',5000,45)=-1;
+master_pos_wait('master-bin.001',5000,45)=-1
+0

mysql-test/t/create.test

@@ -167,3 +167,18 @@ drop table t1, t2, t3;
 drop table t3;
 drop database test_$1;
 
+#
+# Test default table type
+#
+SET SESSION table_type="heap";
+SELECT @@table_type;
+CREATE TABLE t1 (a int not null);
+show create table t1;
+drop table t1;
+# Test what happens when using a non existing table type
+SET SESSION table_type="gemini";
+SELECT @@table_type;
+CREATE TABLE t1 (a int not null);
+show create table t1;
+SET SESSION table_type=default;
+drop table t1;

mysql-test/t/heap.test

@@ -20,7 +20,7 @@ select * from t1;
 alter table t1 add c int not null, add key (c,a);
 drop table t1;
 
-create table t1 (a int not null,b int not null, primary key (a)) type=heap comment="testing heaps";
+create table t1 (a int not null,b int not null, primary key (a)) type=memory comment="testing heaps";
 insert into t1 values(1,1),(2,2),(3,3),(4,4);
 delete from t1 where a > 0;
 select * from t1;

mysql-test/t/innodb.test

@@ -5,7 +5,7 @@
 #
 
 --disable_warnings
-drop table if exists t1,t2;
+drop table if exists t1,t2,t3;
 --enable_warnings
 
 create table t1 (id int unsigned not null auto_increment, code tinyint unsigned not null, name char(20) not null, primary key (id), key (code), unique (name)) type=innodb;
@@ -728,3 +728,74 @@ SELECT * from t1;
 UPDATE t1,t2 SET t1.id=t1.id+1 where t1.id!=t2.id;
 SELECT * from t1;
 DROP TABLE t1,t2;
+
+#
+# Test of range_optimizer
+#
+
+set autocommit=0;
+
+CREATE TABLE t1 (id CHAR(15) NOT NULL, value CHAR(40) NOT NULL, PRIMARY KEY(id)) TYPE=InnoDB;
+
+CREATE TABLE t2 (id CHAR(15) NOT NULL, value CHAR(40) NOT NULL, PRIMARY KEY(id)) TYPE=InnoDB;
+
+CREATE TABLE t3 (id1 CHAR(15) NOT NULL, id2 CHAR(15) NOT NULL, PRIMARY KEY(id1, id2)) TYPE=InnoDB;
+
+INSERT INTO t3 VALUES("my-test-1", "my-test-2");
+COMMIT;
+
+INSERT INTO t1 VALUES("this-key", "will disappear");
+INSERT INTO t2 VALUES("this-key", "will also disappear");
+DELETE FROM t3 WHERE id1="my-test-1";
+
+SELECT * FROM t1;
+SELECT * FROM t2;
+SELECT * FROM t3;
+ROLLBACK;
+
+SELECT * FROM t1;
+SELECT * FROM t2;
+SELECT * FROM t3;
+SELECT * FROM t3 WHERE id1="my-test-1" LOCK IN SHARE MODE;
+COMMIT;
+set autocommit=1;
+DROP TABLE t1,t2,t3;
+
+#
+# Check update with conflicting key
+#
+
+CREATE TABLE t1 (a int not null primary key, b int not null, unique (b)) type=innodb;
+INSERT INTO t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+# We need the a < 1000 test here to quard against the halloween problems
+UPDATE t1 set a=a+100 where b between 2 and 3 and a < 1000;
+SELECT * from t1;
+drop table t1;
+
+#
+# Test multi update with different join methods
+#
+
+CREATE TABLE t1 (a int not null primary key, b int not null, key (b)) type=innodb;
+CREATE TABLE t2 (a int not null primary key, b int not null, key (b)) type=innodb;
+INSERT INTO t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+INSERT INTO t2 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+
+# Full join, without key
+update t1,t2 set t1.a=t1.a+100;
+select * from t1;
+
+# unique key
+update t1,t2 set t1.a=t1.a+100 where t1.a=101;
+select * from t1;
+
+# ref key
+update t1,t2 set t1.b=t1.b+10 where t1.b=2;
+select * from t1;
+
+# Range key (in t1)
+update t1,t2 set t1.b=t1.b+2,t2.b=t1.b where t1.b between 3 and 5;
+select * from t1;
+select * from t2;
+
+drop table t1,t2;

mysql-test/t/multi_update.test

@@ -232,3 +232,31 @@ INSERT INTO t3 VALUES (1,'jedan'),(2,'dva');
 update t1,t2 set t1.naziv="aaaa" where t1.broj=t2.broj;
 update t1,t2,t3 set t1.naziv="bbbb", t2.naziv="aaaa" where t1.broj=t2.broj and t2.broj=t3.broj;
 drop table t1,t2,t3;
+
+#
+# Test multi update with different join methods
+#
+
+CREATE TABLE t1 (a int not null primary key, b int not null, key (b));
+CREATE TABLE t2 (a int not null primary key, b int not null, key (b));
+INSERT INTO t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+INSERT INTO t2 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+
+# Full join, without key
+update t1,t2 set t1.a=t1.a+100;
+select * from t1;
+
+# unique key
+update t1,t2 set t1.a=t1.a+100 where t1.a=101;
+select * from t1;
+
+# ref key
+update t1,t2 set t1.b=t1.b+10 where t1.b=2;
+select * from t1;
+
+# Range key (in t1)
+update t1,t2 set t1.b=t1.b+2,t2.b=t1.b where t1.b between 3 and 5;
+select * from t1;
+select * from t2;
+
+drop table t1,t2;

mysql-test/t/rpl_relayspace-slave.opt

+ -O relay_log_space_limit=1024
\ No newline at end of file

mysql-test/t/rpl_relayspace.test

+# The slave is started with relay_log_space_limit=1024 bytes,
+# to force the deadlock
+
+source include/master-slave.inc;
+connection slave;
+stop slave;
+connection master;
+create table t1 (a int);
+let $1=200;
+disable_query_log;
+while ($1)
+{
+# eval means expand $ expressions
+ eval insert into t1 values( $1 );
+ dec $1;
+}
+# This will generate one 10kB master's binlog
+enable_query_log;
+save_master_pos;
+connection slave;
+reset slave;
+start slave;
+# The I/O thread stops filling the relay log when
+# it's 1kB. And the SQL thread cannot purge this relay log
+# as purge is done only when the SQL thread switches to another
+# relay log, which does not exist here.
+# So we should have a deadlock.
+# if it is not resolved automatically we'll detect
+# it with master_pos_wait that waits for farther than 1kB;
+# it will timeout after 45 seconds;
+# also the slave will probably not cooperate to shutdown
+# (as 2 threads are locked)
+select master_pos_wait('master-bin.001',5000,45)=-1;

sql/ha_innodb.h

@@ -82,8 +82,7 @@ class ha_innobase: public handler
 			  HA_PRIMARY_KEY_IN_READ_INDEX |
 			  HA_DROP_BEFORE_CREATE |
 			  HA_NO_PREFIX_CHAR_KEYS |
-			  HA_TABLE_SCAN_ON_INDEX | 
-			  HA_NOT_MULTI_UPDATE),
+			  HA_TABLE_SCAN_ON_INDEX),
 	  last_dup_key((uint) -1),
 	  start_of_scan(0)
   	{

sql/ha_myisam.cc

@@ -1258,6 +1258,35 @@ longlong ha_myisam::get_auto_increment()
 }
 
 
+/*
+  Find out how many rows there is in the given range
+
+  SYNOPSIS
+    records_in_range()
+    inx			Index to use
+    start_key		Start of range.  Null pointer if from first key
+    start_key_len	Length of start key
+    start_search_flag	Flag if start key should be included or not
+    end_key		End of range. Null pointer if to last key
+    end_key_len		Length of end key
+    end_search_flag	Flag if start key should be included or not
+
+  NOTES
+    start_search_flag can have one of the following values:
+      HA_READ_KEY_EXACT		Include the key in the range
+      HA_READ_AFTER_KEY		Don't include key in range
+
+    end_search_flag can have one of the following values:  
+      HA_READ_BEFORE_KEY	Don't include key in range
+      HA_READ_AFTER_KEY		Include all 'end_key' values in the range
+
+  RETURN
+   HA_POS_ERROR		Something is wrong with the index tree.
+   0			There is no matching keys in the given range
+   number > 0		There is approximately 'number' matching rows in
+			the range.
+*/
+
 ha_rows ha_myisam::records_in_range(int inx,
 				    const byte *start_key,uint start_key_len,
 				    enum ha_rkey_function start_search_flag,
@@ -1272,6 +1301,7 @@ ha_rows ha_myisam::records_in_range(int inx,
 				       end_search_flag);
 }
 
+
 int ha_myisam::ft_read(byte * buf)
 {
   int error;

sql/handler.cc

@@ -121,8 +121,15 @@ handler *get_new_handler(TABLE *table, enum db_type db_type)
 #endif
   case DB_TYPE_HEAP:
     return new ha_heap(table);
-  case DB_TYPE_MYISAM:
   default:					// should never happen
+  {
+    enum db_type def=(enum db_type) current_thd->variables.table_type;
+    /* Try first with 'default table type' */
+    if (db_type != def)
+      return get_new_handler(table, def);
+  }
+  /* Fall back to MyISAM */
+  case DB_TYPE_MYISAM:
     return new ha_myisam(table);
   case DB_TYPE_MRG_MYISAM:
     return new ha_myisammrg(table);

sql/handler.h

@@ -67,7 +67,6 @@
 #define HA_CAN_FULLTEXT         (HA_NO_PREFIX_CHAR_KEYS*2)
 #define HA_CAN_SQL_HANDLER      (HA_CAN_FULLTEXT*2)
 #define HA_NO_AUTO_INCREMENT	(HA_CAN_SQL_HANDLER*2)
-#define HA_NOT_MULTI_UPDATE	(HA_NO_AUTO_INCREMENT*2)
 
 /*
   Next record gives next record according last record read (even

sql/item_func.cc

@@ -851,7 +851,7 @@ void Item_func_rand::fix_length_and_dec()
 
 double Item_func_rand::val()
 {
-  return rnd(rand);
+  return my_rnd(rand);
 }
 
 longlong Item_func_sign::val_int()

sql/key.cc

@@ -271,5 +271,13 @@ bool check_if_key_used(TABLE *table, uint idx, List<Item> &fields)
 	return 1;
     }
   }
+
+  /*
+    If table handler has primary key as part of the index, check that primary
+    key is not updated
+  */
+  if (idx != table->primary_key && table->primary_key < MAX_KEY &&
+      (table->file->table_flags() & HA_PRIMARY_KEY_IN_READ_INDEX))
+    return check_if_key_used(table, table->primary_key, fields);
   return 0;
 }

sql/lex.h

@@ -257,6 +257,7 @@ static SYMBOL symbols[] = {
   { "MEDIUMINT",	SYM(MEDIUMINT),0,0},
   { "MERGE",		SYM(MERGE_SYM),0,0},
   { "MEDIUM",		SYM(MEDIUM_SYM),0,0},
+  { "MEMORY",		SYM(MEMORY_SYM),0,0},
   { "MIDDLEINT",	SYM(MEDIUMINT),0,0},	/* For powerbuilder */
   { "MIN_ROWS",		SYM(MIN_ROWS),0,0},
   { "MINUTE",		SYM(MINUTE_SYM),0,0},

sql/log.cc

@@ -654,6 +654,8 @@ int MYSQL_LOG::purge_first_log(struct st_relay_log_info* rli)
   */
   pthread_mutex_lock(&rli->log_space_lock);
   rli->log_space_total -= rli->relay_log_pos;
+  //tell the I/O thread to take the relay_log_space_limit into account
+  rli->ignore_log_space_limit= 0;
   pthread_mutex_unlock(&rli->log_space_lock);
   pthread_cond_broadcast(&rli->log_space_cond);
   

sql/mysqld.cc

@@ -2761,7 +2761,7 @@ static void create_new_thread(THD *thd)
     max_used_connections=thread_count-delayed_insert_threads;
   thd->thread_id=thread_id++;
   for (uint i=0; i < 8 ; i++)			// Generate password teststring
-    thd->scramble[i]= (char) (rnd(&sql_rand)*94+33);
+    thd->scramble[i]= (char) (my_rnd(&sql_rand)*94+33);
   thd->scramble[8]=0;
   // Back it up as old clients may need it
   memcpy(thd->old_scramble,thd->scramble,9);

sql/password.c

@@ -125,7 +125,7 @@ static void old_randominit(struct rand_struct *rand_st,ulong seed1)
     Generated pseudo random number
 */
 
-double rnd(struct rand_struct *rand_st)
+double my_rnd(struct rand_struct *rand_st)
 {
   rand_st->seed1=(rand_st->seed1*3+rand_st->seed2) % rand_st->max_value;
   rand_st->seed2=(rand_st->seed1+rand_st->seed2+33) % rand_st->max_value;
@@ -435,7 +435,7 @@ char get_password_version(const char *password)
 
 
 
-inline uint char_val(char X)
+static inline unsigned int char_val(char X)
 {
   return (uint) (X >= '0' && X <= '9' ? X-'0' :
 		 X >= 'A' && X <= 'Z' ? X-'A'+10 :
@@ -652,10 +652,10 @@ char *scramble(char *to,const char *message,const char *password,
       randominit(&rand_st,hash_pass[0] ^ hash_message[0],
 		 hash_pass[1] ^ hash_message[1]);
     while (*msg++)
-      *to++= (char) (floor(rnd(&rand_st)*31)+64);
+      *to++= (char) (floor(my_rnd(&rand_st)*31)+64);
     if (!old_ver)
     {						/* Make it harder to break */
-      char extra=(char) (floor(rnd(&rand_st)*31));
+      char extra=(char) (floor(my_rnd(&rand_st)*31));
       while (to_start != to)
 	*(to_start++)^=extra;
     }
@@ -711,11 +711,11 @@ my_bool check_scramble(const char *scrambled, const char *message,
 	       hash_pass[1] ^ hash_message[1]);
   to=buff;
   for (pos=scrambled ; *pos ; pos++)
-    *to++=(char) (floor(rnd(&rand_st)*31)+64);
+    *to++=(char) (floor(my_rnd(&rand_st)*31)+64);
   if (old_ver)
     extra=0;
   else
-    extra=(char) (floor(rnd(&rand_st)*31));
+    extra=(char) (floor(my_rnd(&rand_st)*31));
   to=buff;
   while (*scrambled)
   {

sql/slave.cc

@@ -263,7 +263,7 @@ int init_relay_log_pos(RELAY_LOG_INFO* rli,const char* log,
   if (log)					// If not first log
   {
     if (strcmp(log, rli->linfo.log_file_name))
-      rli->skip_log_purge=1;			// Different name; Don't purge
+      rli->skip_log_purge= 1;			// Different name; Don't purge
     if (rli->relay_log.find_log_pos(&rli->linfo, log, 1))
     {
       *errmsg="Could not find target log during relay log initialization";
@@ -298,6 +298,12 @@ int init_relay_log_pos(RELAY_LOG_INFO* rli,const char* log,
     my_b_seek(rli->cur_log,(off_t)pos);
 
 err:
+  /*
+    If we don't purge, we can't honour relay_log_space_limit ;
+    silently discard it
+  */
+  if (rli->skip_log_purge)
+    rli->log_space_limit= 0;
   pthread_cond_broadcast(&rli->data_cond);
   if (need_data_lock)
     pthread_mutex_unlock(&rli->data_lock);
@@ -1386,7 +1392,8 @@ static bool wait_for_relay_log_space(RELAY_LOG_INFO* rli)
   thd->proc_info = "Waiting for relay log space to free";
 
   while (rli->log_space_limit < rli->log_space_total &&
-	 !(slave_killed=io_slave_killed(thd,mi)))
+	 !(slave_killed=io_slave_killed(thd,mi)) &&
+         !rli->ignore_log_space_limit)
   {
     pthread_cond_wait(&rli->log_space_cond, &rli->log_space_lock);
   }
@@ -1667,7 +1674,7 @@ bool flush_master_info(MASTER_INFO* mi)
 
 st_relay_log_info::st_relay_log_info()
   :info_fd(-1), cur_log_fd(-1), master_log_pos(0), save_temporary_tables(0),
-   cur_log_old_open_count(0), log_space_total(0), 
+   cur_log_old_open_count(0), log_space_total(0), ignore_log_space_limit(0),
    slave_skip_counter(0), abort_pos_wait(0), slave_run_id(0),
    sql_thd(0), last_slave_errno(0), inited(0), abort_slave(0),
    slave_running(0), skip_log_purge(0),
@@ -2378,7 +2385,8 @@ reconnect done to recover from failed read");
       }
       flush_master_info(mi);
       if (mi->rli.log_space_limit && mi->rli.log_space_limit <
-	  mi->rli.log_space_total)
+	  mi->rli.log_space_total &&
+          !mi->rli.ignore_log_space_limit)
 	if (wait_for_relay_log_space(&mi->rli))
 	{
 	  sql_print_error("Slave I/O thread aborted while waiting for relay \
@@ -2491,6 +2499,10 @@ extern "C" pthread_handler_decl(handle_slave_sql,arg)
   pthread_cond_broadcast(&rli->start_cond);
   // This should always be set to 0 when the slave thread is started
   rli->pending = 0;
+
+  //tell the I/O thread to take relay_log_space_limit into account from now on
+  rli->ignore_log_space_limit= 0;
+
   if (init_relay_log_pos(rli,
 			 rli->relay_log_name,
 			 rli->relay_log_pos,
@@ -3199,11 +3211,41 @@ Log_event* next_event(RELAY_LOG_INFO* rli)
 	  update. If we do not, show slave status will block
 	*/
 	pthread_mutex_unlock(&rli->data_lock);
- 	/* Note that wait_for_update unlocks lock_log ! */
-	rli->relay_log.wait_for_update(rli->sql_thd);
-	
-	// re-acquire data lock since we released it earlier
-	pthread_mutex_lock(&rli->data_lock);
+
+        /*
+          Possible deadlock : 
+          - the I/O thread has reached log_space_limit
+          - the SQL thread has read all relay logs, but cannot purge for some
+          reason:
+            * it has already purged all logs except the current one
+            * there are other logs than the current one but they're involved in
+            a transaction that finishes in the current one (or is not finished)
+          Solution :
+          Wake up the possibly waiting I/O thread, and set a boolean asking
+          the I/O thread to temporarily ignore the log_space_limit
+          constraint, because we do not want the I/O thread to block because of
+          space (it's ok if it blocks for any other reason (e.g. because the
+          master does not send anything). Then the I/O thread stops waiting 
+          and reads more events.
+          The SQL thread decides when the I/O thread should take log_space_limit
+          into account again : ignore_log_space_limit is reset to 0 
+          in purge_first_log (when the SQL thread purges the just-read relay
+          log), and also when the SQL thread starts. We should also reset
+          ignore_log_space_limit to 0 when the user does RESET SLAVE, but in
+          fact, no need as RESET SLAVE requires that the slave
+          be stopped, and when the SQL thread is later restarted
+          ignore_log_space_limit will be reset to 0.
+        */
+        pthread_mutex_lock(&rli->log_space_lock);
+        // prevent the I/O thread from blocking next times
+        rli->ignore_log_space_limit= 1; 
+        // If the I/O thread is blocked, unblock it
+        pthread_cond_broadcast(&rli->log_space_cond);
+        pthread_mutex_unlock(&rli->log_space_lock);
+        // Note that wait_for_update unlocks lock_log !
+        rli->relay_log.wait_for_update(rli->sql_thd);
+        // re-acquire data lock since we released it earlier
+        pthread_mutex_lock(&rli->data_lock);
 	continue;
       }
       /*

sql/slave.h

@@ -156,7 +156,14 @@ typedef struct st_relay_log_info
                     extra offset to be added to the position.
   */
   ulonglong relay_log_pos, pending;
+
+  /*
+    Handling of the relay_log_space_limit optional constraint.
+    ignore_log_space_limit is used to resolve a deadlock between I/O and SQL
+    threads, it makes the I/O thread temporarily forget about the constraint
+  */
   ulonglong log_space_limit,log_space_total;
+  bool ignore_log_space_limit;
 
   /*
     InnoDB internally stores the master log position it has processed

sql/sql_class.cc

@@ -186,7 +186,7 @@ THD::THD():user_time(0), is_fatal_error(0),
   */
   {
     pthread_mutex_lock(&LOCK_thread_count);
-    ulong tmp=(ulong) (rnd(&sql_rand) * 0xffffffff); /* make all bits random */
+    ulong tmp=(ulong) (my_rnd(&sql_rand) * 0xffffffff); /* make all bits random */
     pthread_mutex_unlock(&LOCK_thread_count);
     randominit(&rand, tmp + (ulong) &rand, tmp + (ulong) ::query_id);
   }

sql/sql_crypt.cc

@@ -46,7 +46,7 @@ void SQL_CRYPT::crypt_init(ulong *rand_nr)
 
   for (i=0 ; i<= 255 ; i++)
   {
-    int idx= (uint) (rnd(&rand)*255.0);
+    int idx= (uint) (my_rnd(&rand)*255.0);
     char a= decode_buff[idx];
     decode_buff[idx]= decode_buff[i];
     decode_buff[+i]=a;
@@ -62,7 +62,7 @@ void SQL_CRYPT::encode(char *str,uint length)
 {
   for (uint i=0; i < length; i++)
   {
-    shift^=(uint) (rnd(&rand)*255.0);
+    shift^=(uint) (my_rnd(&rand)*255.0);
     uint idx= (uint) (uchar) str[0];
     *str++ = (char) ((uchar) encode_buff[idx] ^ shift);
     shift^= idx;
@@ -74,7 +74,7 @@ void SQL_CRYPT::decode(char *str,uint length)
 {
   for (uint i=0; i < length; i++)
   {
-    shift^=(uint) (rnd(&rand)*255.0);
+    shift^=(uint) (my_rnd(&rand)*255.0);
     uint idx= (uint) ((unsigned char) str[0] ^ shift);
     *str = decode_buff[idx];
     shift^= (uint) (uchar) *str++;

sql/sql_parse.cc

@@ -563,7 +563,10 @@ check_connections(THD *thd)
 	thd->host=ip_to_hostname(&thd->remote.sin_addr,&connect_errors);
 	/* Cut very long hostnames to avoid possible overflows */
 	if (thd->host)
+	{
 	  thd->host[min(strlen(thd->host), HOSTNAME_LENGTH)]= 0;
+	  thd->host_or_ip= thd->host;
+	}
 	if (connect_errors > max_connect_errors)
 	  return(ER_HOST_IS_BLOCKED);
       }

sql/sql_repl.cc

@@ -900,22 +900,21 @@ int change_master(THD* thd, MASTER_INFO* mi)
 
   if (lex_mi->relay_log_name)
   {
-    need_relay_log_purge = 0;
-    mi->rli.skip_log_purge=1;
+    need_relay_log_purge= 0;
     strmake(mi->rli.relay_log_name,lex_mi->relay_log_name,
 	    sizeof(mi->rli.relay_log_name)-1);
   }
 
   if (lex_mi->relay_log_pos)
   {
-    need_relay_log_purge=0;
+    need_relay_log_purge= 0;
     mi->rli.relay_log_pos=lex_mi->relay_log_pos;
   }
 
   flush_master_info(mi);
   if (need_relay_log_purge)
   {
-    mi->rli.skip_log_purge=0;
+    mi->rli.skip_log_purge= 0;
     thd->proc_info="purging old relay logs";
     if (purge_relay_logs(&mi->rli, thd,
 			 0 /* not only reset, but also reinit */,
@@ -929,6 +928,7 @@ int change_master(THD* thd, MASTER_INFO* mi)
   else
   {
     const char* msg;
+    mi->rli.skip_log_purge= 1;
     /* Relay log is already initialized */
     if (init_relay_log_pos(&mi->rli,
 			   mi->rli.relay_log_name,

sql/sql_show.cc

@@ -1334,10 +1334,10 @@ void mysqld_list_processes(THD *thd,const char *user, bool verbose)
 	{
 	  if ((thd_info->host= thd->alloc(LIST_PROCESS_HOST_LEN+1)))
 	    my_snprintf((char *) thd_info->host, LIST_PROCESS_HOST_LEN,
-			"%s:%u", thd->host_or_ip, tmp->peer_port);
+			"%s:%u", tmp->host_or_ip, tmp->peer_port);
 	}
 	else
-	  thd_info->host= thd->strdup(thd->host_or_ip);
+	  thd_info->host= thd->strdup(tmp->host_or_ip);
         if ((thd_info->db=tmp->db))             // Safe test
           thd_info->db=thd->strdup(thd_info->db);
         thd_info->command=(int) tmp->command;

sql/sql_update.cc

@@ -23,6 +23,8 @@
 #include "sql_acl.h"
 #include "sql_select.h"
 
+static bool safe_update_on_fly(JOIN_TAB *join_tab, List<Item> *fields);
+
 /* Return 0 if row hasn't changed */
 
 static bool compare_record(TABLE *table, ulong query_id)
@@ -547,11 +549,12 @@ int multi_update::prepare(List<Item> &not_used_values, SELECT_LEX_UNIT *unit)
 
 
 /*
-  Store first used table in main_table as this should be updated first
-  This is because we know that no row in this table will be read twice.
+  Initialize table for multi table
 
-  Create temporary tables to store changed values for all other tables
-  that are updated.
+  IMPLEMENTATION
+    - Update first table in join on the fly, if possible
+    - Create temporary tables to store changed values for all other tables
+      that are updated (and main_table if the above doesn't hold).
 */
 
 bool
@@ -565,53 +568,113 @@ multi_update::initialize_tables(JOIN *join)
   main_table=join->join_tab->table;
   trans_safe= transactional_tables= main_table->file->has_transactions();
   log_delayed= trans_safe || main_table->tmp_table != NO_TMP_TABLE;
-  table_to_update= (main_table->file->table_flags() & HA_NOT_MULTI_UPDATE) ? 
-    (TABLE *) 0 : main_table;
-  /* Create a temporary table for all tables after except main table */
+  table_to_update= 0;
+
+  /* Create a temporary table for keys to all tables, except main table */
   for (table_ref= update_tables; table_ref; table_ref=table_ref->next)
   {
     TABLE *table=table_ref->table;
-    if (table != table_to_update)
-    {
-      uint cnt= table_ref->shared;
-      ORDER     group;
-      List<Item> temp_fields= *fields_for_table[cnt];
-      TMP_TABLE_PARAM *tmp_param= tmp_table_param+cnt;
-
-      /*
-	Create a temporary table to store all fields that are changed for this
-	table. The first field in the temporary table is a pointer to the
-	original row so that we can find and update it
-      */
-
-      /* ok to be on stack as this is not referenced outside of this func */
-      Field_string offset(table->file->ref_length, 0, "offset",
-			  table, &my_charset_bin);
-      if (temp_fields.push_front(new Item_field(((Field *) &offset))))
-	DBUG_RETURN(1);
+    uint cnt= table_ref->shared;
+    List<Item> temp_fields= *fields_for_table[cnt];
+    ORDER     group;
 
-      /* Make an unique key over the first field to avoid duplicated updates */
-      bzero((char*) &group, sizeof(group));
-      group.asc= 1;
-      group.item= (Item**) temp_fields.head_ref();
-
-      tmp_param->quick_group=1;
-      tmp_param->field_count=temp_fields.elements;
-      tmp_param->group_parts=1;
-      tmp_param->group_length= table->file->ref_length;
-      if (!(tmp_tables[cnt]=create_tmp_table(thd,
-					     tmp_param,
-					     temp_fields,
-					     (ORDER*) &group, 0, 0,
-					     TMP_TABLE_ALL_COLUMNS,
-					     HA_POS_ERROR)))
-	DBUG_RETURN(1);
-      tmp_tables[cnt]->file->extra(HA_EXTRA_WRITE_CACHE);
+    if (table == main_table)			// First table in join
+    {
+      if (safe_update_on_fly(join->join_tab, &temp_fields))
+      {
+	table_to_update= main_table;		// Update table on the fly
+	continue;
+      }
     }
+
+    TMP_TABLE_PARAM *tmp_param= tmp_table_param+cnt;
+
+    /*
+      Create a temporary table to store all fields that are changed for this
+      table. The first field in the temporary table is a pointer to the
+      original row so that we can find and update it
+    */
+
+    /* ok to be on stack as this is not referenced outside of this func */
+    Field_string offset(table->file->ref_length, 0, "offset",
+			table, 1, &my_charset_bin);
+    if (temp_fields.push_front(new Item_field(((Field *) &offset))))
+      DBUG_RETURN(1);
+
+    /* Make an unique key over the first field to avoid duplicated updates */
+    bzero((char*) &group, sizeof(group));
+    group.asc= 1;
+    group.item= (Item**) temp_fields.head_ref();
+
+    tmp_param->quick_group=1;
+    tmp_param->field_count=temp_fields.elements;
+    tmp_param->group_parts=1;
+    tmp_param->group_length= table->file->ref_length;
+    if (!(tmp_tables[cnt]=create_tmp_table(thd,
+					   tmp_param,
+					   temp_fields,
+					   (ORDER*) &group, 0, 0,
+					   TMP_TABLE_ALL_COLUMNS,
+					   HA_POS_ERROR)))
+      DBUG_RETURN(1);
+    tmp_tables[cnt]->file->extra(HA_EXTRA_WRITE_CACHE);
   }
   DBUG_RETURN(0);
 }
 
+/*
+  Check if table is safe to update on fly
+
+  SYNOPSIS
+    safe_update_on_fly
+    join_tab		How table is used in join
+    fields		Fields that are updated
+
+  NOTES
+    We can update the first table in join on the fly if we know that
+    a row in this tabel will never be read twice. This is true under
+    the folloing conditions:
+
+    - We are doing a table scan and the data is in a separate file (MyISAM) or
+      if we don't update a clustered key.
+
+    - We are doing a range scan and we don't update the scan key or
+      the primary key for a clustered table handler.
+
+  WARNING
+    This code is a bit dependent of how make_join_readinfo() works.
+
+  RETURN
+    0		Not safe to update
+    1		Safe to update
+*/
+
+static bool safe_update_on_fly(JOIN_TAB *join_tab, List<Item> *fields)
+{
+  TABLE *table= join_tab->table;
+  switch (join_tab->type) {
+  case JT_SYSTEM:
+  case JT_CONST:
+  case JT_EQ_REF:
+    return 1;					// At most one matching row
+  case JT_REF:
+    return !check_if_key_used(table, join_tab->ref.key, *fields);
+  case JT_ALL:
+    /* If range search on index */
+    if (join_tab->quick)
+      return !check_if_key_used(table, join_tab->quick->index,
+				*fields);
+    /* If scanning in clustered key */
+    if ((table->file->table_flags() & HA_PRIMARY_KEY_IN_READ_INDEX) &&
+	table->primary_key < MAX_KEY)
+      return !check_if_key_used(table, table->primary_key, *fields);
+    return 1;
+  default:
+    break;					// Avoid compler warning
+  }
+  return 0;
+}
+
 
 multi_update::~multi_update()
 {

sql/sql_yacc.yy

@@ -283,6 +283,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %token	MAX_UPDATES_PER_HOUR
 %token	MEDIUM_SYM
 %token	MERGE_SYM
+%token	MEMORY_SYM
 %token	MIN_ROWS
 %token	MYISAM_SYM
 %token	NAMES_SYM
@@ -1009,6 +1010,7 @@ table_types:
 	| MYISAM_SYM	{ $$= DB_TYPE_MYISAM; }
 	| MERGE_SYM	{ $$= DB_TYPE_MRG_MYISAM; }
 	| HEAP_SYM	{ $$= DB_TYPE_HEAP; }
+	| MEMORY_SYM	{ $$= DB_TYPE_HEAP; }
 	| BERKELEY_DB_SYM { $$= DB_TYPE_BERKELEY_DB; }
 	| INNOBASE_SYM  { $$= DB_TYPE_INNODB; };
 
@@ -4088,6 +4090,7 @@ keyword:
 	| MAX_UPDATES_PER_HOUR	{}
 	| MEDIUM_SYM		{}
 	| MERGE_SYM		{}
+	| MEMORY_SYM		{}
 	| MINUTE_SYM		{}
 	| MIN_ROWS		{}
 	| MODIFY_SYM		{}

sql/table.cc

@@ -1245,7 +1245,7 @@ bool check_table_name(const char *name, uint length)
       }
     }
 #endif
-    if (*name == '/' || *name == FN_LIBCHAR || *name == FN_EXTCHAR)
+    if (*name == '/' || *name == '\\' || *name == FN_EXTCHAR)
       return 1;
     name++;
   }

strings/strto.c

@@ -35,6 +35,8 @@
   it can be compiled with the UNSIGNED and/or LONGLONG flag set
 */
 
+#define strtoll glob_strtoll		/* Fix for True64 */
+
 #include <my_global.h>
 #include "m_string.h"
 #include "m_ctype.h"