merge 4.1->5.0

mysql-test/r/group_by.result:
  Auto merged
mysql-test/r/metadata.result:
  Auto merged
mysql-test/r/union.result:
  Auto merged
mysql-test/t/union.test:
  Auto merged
sql/item.h:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
support-files/mysql.server.sh:
  Auto merged

Build-tools/Bootstrap

@@ -240,40 +240,52 @@ if (defined $opt_changelog)
 	# the last tagged ChangeSet (this relies heavily on our current tagging
 	# practice!)
 	#
-	my $revision= "";
+	$opt_changelog=~ s/^=//;	# Sometimes, a leading '=' was not stripped.
+	my $log_base= $opt_changelog;
+	my $changelogfile;
+	if ($target_dir =~ m:^/:)	# we need an absolute path, as we change directory
+	{
+		$changelogfile= $target_dir. "/ChangeLog";
+	}
+	else
+	{
+		$changelogfile= cwd() . "/" . $target_dir . "/ChangeLog";
+	}
+
 	if ($opt_changelog eq "last")
 	{
 		if (!$opt_revision)
 		{
-			$revision= `bk changes -t -d':REV:::TAG:' -n $REPO | grep mysql-$major.$minor | head -1 | cut -f1 -d ":"`;
+			$log_base= `bk changes -t -d':REV:::TAG:' -n $REPO | grep mysql-$major.$minor | head -1 | cut -f1 -d ":"`;
 		}
 		else
 		{
-			$revision= `bk changes -r..$opt_revision -t -d':REV:' -n $REPO | head -2 | tail -1`;
+			$log_base= `bk changes -r..$opt_revision -t -d':REV:' -n $REPO | head -2 | tail -1`;
 		}
-		chomp($revision);
-		$opt_changelog= $revision;
+		chomp($log_base);
 	}
 
-	$msg= "Adding $target_dir/ChangeLog";
-	$msg.= " (down to revision $opt_changelog)" if $opt_changelog ne "";
+	$msg= "Adding $changelogfile";
+	$msg.= " (down to revision $log_base)" if $log_base ne "";
 	&logger($msg);
-	$command= "bk changes -v";
-	$command.= " -r" if ($opt_changelog ne "" || $opt_revision);
-	$command.= $opt_changelog if $opt_changelog ne "";
-	$command.= ".." if ($opt_changelog ne "" && !$opt_revision);
+	# Due to a BK error, "bk changes" must be run in $REPO !
+	$command= "cd $REPO ; ";
+	$command.= "bk changes -v";
+	$command.= " -r" if ($log_base ne "" || $opt_revision);
+	$command.= $log_base if $log_base ne "";
+	$command.= ".." if ($log_base ne "" && !$opt_revision);
 	$command.= ".." . $opt_revision if $opt_revision;
-	$command.= " " . $REPO . " > $target_dir/ChangeLog";
+	$command.= " > $changelogfile";
 	&logger($command);
 	# We cannot use run_command here because of output redirection
 	unless ($opt_dry_run)
 	{
-		system($command) == 0 or &abort("Could not create $target_dir/ChangeLog!");
+		system($command) == 0 or &abort("Could not create $changelogfile!");
 	}
 }
 
 #
-# Add the latest manual from the mysqldoc tree
+# Add the latest manual and tool from the mysqldoc tree
 #
 unless ($opt_skip_manual)
 {
@@ -283,6 +295,8 @@ unless ($opt_skip_manual)
 		system ("bk cat $opt_docdir/Docs/$file.texi > $target_dir/Docs/$file.texi") == 0
 		or &abort("Could not update $file.texi in $target_dir/Docs/!");
 	}
+	&run_command("cp $opt_docdir/Docs/Support/texi2html $target_dir/Docs/Support",
+	  "Could not copy $opt_docdir/Docs/Support/texi2html!");
 
 	&run_command("rm -f $target_dir/Docs/Images/Makefile*",
  	  "Could not remove Makefiles in $target_dir/Docs/Images/!");

mysql-test/r/func_group.result

@@ -783,7 +783,7 @@ insert into t1 values (now());
 create table t2 select f2 from (select max(now()) f2 from t1) a;
 show columns from t2;
 Field	Type	Null	Key	Default	Extra
-f2	datetime	NO		0000-00-00 00:00:00	
+f2	datetime	YES		NULL	
 drop table t2;
 create table t2 select f2 from (select now() f2 from t1) a;
 show columns from t2;

mysql-test/r/group_by.result

@@ -677,3 +677,28 @@ select sum(a)*sum(b) as d from t1 where a=1 group by c having d > 0;
 d
 10
 drop table t1;
+create table t1(a int);
+insert into t1 values (0),(1),(2),(3),(4),(5),(6),(8),(9);
+create table t2 (
+a int,
+b varchar(200) NOT NULL,
+c varchar(50) NOT NULL,
+d varchar(100) NOT NULL,
+primary key (a,b(132),c,d),
+key a (a,b)
+) charset=utf8;
+insert into t2 select 
+x3.a,  -- 3
+concat('val-', x3.a + 3*x4.a), -- 12
+concat('val-', @a:=x3.a + 3*x4.a + 12*C.a), -- 120
+concat('val-', @a + 120*D.a)
+from t1 x3, t1 x4, t1 C, t1 D where x3.a < 3 and x4.a < 4 and D.a < 4;
+delete from t2  where a = 2 and b = 'val-2' limit 30;
+explain select c from t2 where a = 2 and b = 'val-2' group by c;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t2	ref	PRIMARY,a	PRIMARY	400	const,const	6	Using where
+select c from t2 where a = 2 and b = 'val-2' group by c;
+c
+val-74
+val-98
+drop table t1,t2;

mysql-test/r/metadata.result

@@ -55,8 +55,33 @@ id	data	data
 2	female	no
 select t1.id from t1 union select t2.id from t2;
 Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
-def	test	t1	t1	id	id	1	3	1	Y	32768	0	63
+def				id	id	1	4	1	Y	32768	0	63
 id
 1
 2
 drop table t1,t2;
+create table t1 ( a int, b varchar(30), primary key(a));
+insert into t1 values (1,'one');
+insert into t1 values (2,'two');
+set @arg00=1 ;
+select @arg00 FROM t1 where a=1 union distinct select 1 FROM t1 where a=1;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def				@arg00	@arg00	8	20	1	Y	32768	0	63
+@arg00
+1
+select * from (select @arg00) aaa;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def			aaa	@arg00	@arg00	8	20	1	Y	32768	0	63
+@arg00
+1
+select 1 union select 1;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def				1	1	8	20	1	N	32769	0	63
+1
+1
+select * from (select 1 union select 1) aaa;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def			aaa	1	1	8	20	1	N	32769	0	63
+1
+1
+drop table t1;

mysql-test/r/union.result

@@ -732,7 +732,7 @@ tetetetetest
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `dt` blob
+  `dt` longblob
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 drop table t1;
 create table t1 SELECT sv from t2 UNION select b from t2;
@@ -755,7 +755,7 @@ tetetetetest
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `i` blob
+  `i` longblob
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 drop table t1;
 create table t1 SELECT sv from t2 UNION select tx from t2;
@@ -766,7 +766,7 @@ teeeeeeeeeeeest
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `sv` text
+  `sv` longtext
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 drop table t1;
 create table t1 SELECT b from t2 UNION select tx from t2;
@@ -1200,3 +1200,38 @@ select concat('value is: ', @val) union select 'some text';
 concat('value is: ', @val)
 value is: 6
 some text
+CREATE TABLE t1 (
+a ENUM('','','') character set utf8 not null default '',
+b ENUM("one", "two") character set utf8,
+c ENUM("one", "two")
+);
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` enum('','','') character set utf8 NOT NULL default '',
+  `b` enum('one','two') character set utf8 default NULL,
+  `c` enum('one','two') default NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+insert into t1 values ('', 'one', 'one'), ('', 'two', 'one'), ('', NULL, NULL);
+create table t2 select NULL union select a from t1;
+show columns from t2;
+Field	Type	Null	Key	Default	Extra
+NULL	enum('','','')	YES		NULL	
+drop table t2;
+create table t2 select a from t1 union select NULL;
+show columns from t2;
+Field	Type	Null	Key	Default	Extra
+a	enum('','','')	YES		NULL	
+drop table t2;
+create table t2 select a from t1 union select a from t1;
+show columns from t2;
+Field	Type	Null	Key	Default	Extra
+a	char(1)				
+drop table t2;
+create table t2 select a from t1 union select c from t1;
+ERROR HY000: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation 'UNION'
+create table t2 select a from t1 union select b from t1;
+show columns from t2;
+Field	Type	Null	Key	Default	Extra
+a	varchar(3)	YES		NULL	
+drop table t2, t1;

mysql-test/t/group_by.test

@@ -489,3 +489,28 @@ select a,sum(b) from t1 where a=1 group by c having a=1;
 select a as d,sum(b) from t1 where a=1 group by c having d=1;
 select sum(a)*sum(b) as d from t1 where a=1 group by c having d > 0;
 drop table t1;
+
+# Test for BUG#9213 GROUP BY query on utf-8 key returns wrong results
+create table t1(a int);
+insert into t1 values (0),(1),(2),(3),(4),(5),(6),(8),(9);
+create table t2 (
+  a int,
+  b varchar(200) NOT NULL,
+  c varchar(50) NOT NULL,
+  d varchar(100) NOT NULL,
+  primary key (a,b(132),c,d),
+  key a (a,b)
+) charset=utf8;
+
+insert into t2 select 
+   x3.a,  -- 3
+   concat('val-', x3.a + 3*x4.a), -- 12
+   concat('val-', @a:=x3.a + 3*x4.a + 12*C.a), -- 120
+   concat('val-', @a + 120*D.a)
+from t1 x3, t1 x4, t1 C, t1 D where x3.a < 3 and x4.a < 4 and D.a < 4;
+delete from t2  where a = 2 and b = 'val-2' limit 30;
+
+explain select c from t2 where a = 2 and b = 'val-2' group by c;
+select c from t2 where a = 2 and b = 'val-2' group by c;
+drop table t1,t2;
+

mysql-test/t/metadata.test

@@ -34,4 +34,17 @@ select t1.id, t1.data, t2.data from t1, t2 where t1.id = t2.id order by t1.id;
 select t1.id from t1 union select t2.id from t2;
 drop table t1,t2;
 
+#
+# variables union and derived tables metadata test
+#
+create table t1 ( a int, b varchar(30), primary key(a));
+insert into t1 values (1,'one');
+insert into t1 values (2,'two');
+set @arg00=1 ;
+select @arg00 FROM t1 where a=1 union distinct select 1 FROM t1 where a=1;
+select * from (select @arg00) aaa;
+select 1 union select 1;
+select * from (select 1 union select 1) aaa;
+drop table t1;
+
 --disable_metadata

mysql-test/t/union.test

@@ -735,3 +735,28 @@ drop table t1;
 #
 set @val:=6;
 select concat('value is: ', @val) union select 'some text';
+
+#
+# Enum merging test
+#
+CREATE TABLE t1 (
+  a ENUM('','','') character set utf8 not null default '',
+  b ENUM("one", "two") character set utf8,
+  c ENUM("one", "two")
+);
+show create table t1;
+insert into t1 values ('', 'one', 'one'), ('', 'two', 'one'), ('', NULL, NULL);
+create table t2 select NULL union select a from t1;
+show columns from t2;
+drop table t2;
+create table t2 select a from t1 union select NULL;
+show columns from t2;
+drop table t2;
+create table t2 select a from t1 union select a from t1;
+show columns from t2;
+drop table t2;
+-- error 1267
+create table t2 select a from t1 union select c from t1;
+create table t2 select a from t1 union select b from t1;
+show columns from t2;
+drop table t2, t1;

sql/field.h

@@ -31,6 +31,17 @@ class Protocol;
 struct st_cache_field;
 void field_conv(Field *to,Field *from);
 
+inline uint get_enum_pack_length(int elements)
+{
+  return elements < 256 ? 1 : 2;
+}
+
+inline uint get_set_pack_length(int elements)
+{
+  uint len= (elements + 7) / 8;
+  return len > 4 ? 8 : len;
+}
+
 class Field
 {
   Field(const Item &);				/* Prevent use of these */
@@ -71,18 +82,6 @@ class Field
     GEOM_GEOMETRYCOLLECTION = 7
   };
   enum imagetype { itRAW, itMBR};
-  enum field_cast_enum
-  {
-    FIELD_CAST_STOP, FIELD_CAST_DECIMAL, FIELD_CAST_TINY, FIELD_CAST_SHORT,
-    FIELD_CAST_MEDIUM, FIELD_CAST_LONG, FIELD_CAST_LONGLONG,
-    FIELD_CAST_FLOAT, FIELD_CAST_DOUBLE,
-    FIELD_CAST_NULL,
-    FIELD_CAST_TIMESTAMP, FIELD_CAST_YEAR, FIELD_CAST_DATE, FIELD_CAST_NEWDATE,
-    FIELD_CAST_TIME, FIELD_CAST_DATETIME,
-    FIELD_CAST_STRING, FIELD_CAST_VARSTRING, FIELD_CAST_BLOB,
-    FIELD_CAST_GEOM, FIELD_CAST_ENUM, FIELD_CAST_SET, FIELD_CAST_BIT,
-    FIELD_CAST_NEWDECIMAL
-  };
 
   utype		unireg_check;
   uint32	field_length;		// Length of field
@@ -119,6 +118,8 @@ class Field
   String *val_int_as_str(String *val_buffer, my_bool unsigned_flag);
   virtual Item_result result_type () const=0;
   virtual Item_result cmp_type () const { return result_type(); }
+  static enum_field_types field_type_merge(enum_field_types, enum_field_types);
+  static Item_result result_merge_type(enum_field_types);
   bool eq(Field *field)
   {
     return (ptr == field->ptr && null_ptr == field->null_ptr &&
@@ -296,8 +297,6 @@ class Field
     return (op_result == E_DEC_OVERFLOW);
   }
   int warn_if_overflow(int op_result);
-  virtual field_cast_enum field_cast_type()= 0;
-  bool field_cast_compatible(field_cast_enum type);
   /* maximum possible display length */
   virtual uint32 max_length()= 0;
   /* length of field value symbolic representation (in bytes) */
@@ -432,7 +431,6 @@ class Field_decimal :public Field_real {
   bool zero_pack() const { return 0; }
   void sql_type(String &str) const;
   uint32 max_length() { return field_length; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_DECIMAL; }
 };
 
 
@@ -504,7 +502,6 @@ class Field_tiny :public Field_num {
   uint32 pack_length() const { return 1; }
   void sql_type(String &str) const;
   uint32 max_length() { return 4; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_TINY; }
 };
 
 
@@ -541,7 +538,6 @@ class Field_short :public Field_num {
   uint32 pack_length() const { return 2; }
   void sql_type(String &str) const;
   uint32 max_length() { return 6; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_SHORT; }
 };
 
 
@@ -573,7 +569,6 @@ class Field_medium :public Field_num {
   uint32 pack_length() const { return 3; }
   void sql_type(String &str) const;
   uint32 max_length() { return 8; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_MEDIUM; }
 };
 
 
@@ -610,7 +605,6 @@ class Field_long :public Field_num {
   uint32 pack_length() const { return 4; }
   void sql_type(String &str) const;
   uint32 max_length() { return 11; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_LONG; }
 };
 
 
@@ -650,7 +644,6 @@ class Field_longlong :public Field_num {
   void sql_type(String &str) const;
   bool can_be_compared_as_longlong() const { return TRUE; }
   uint32 max_length() { return 20; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_LONGLONG; }
 };
 #endif
 
@@ -686,7 +679,6 @@ class Field_float :public Field_real {
   uint32 pack_length() const { return sizeof(float); }
   void sql_type(String &str) const;
   uint32 max_length() { return 24; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_FLOAT; }
 };
 
 
@@ -721,7 +713,6 @@ class Field_double :public Field_real {
   uint32 pack_length() const { return sizeof(double); }
   void sql_type(String &str) const;
   uint32 max_length() { return 53; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_DOUBLE; }
 };
 
 
@@ -754,7 +745,6 @@ class Field_null :public Field_str {
   void sql_type(String &str) const;
   uint size_of() const { return sizeof(*this); }
   uint32 max_length() { return 4; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_NULL; }
 };
 
 
@@ -806,7 +796,6 @@ class Field_timestamp :public Field_str {
   }
   bool get_date(TIME *ltime,uint fuzzydate);
   bool get_time(TIME *ltime);
-  field_cast_enum field_cast_type() { return FIELD_CAST_TIMESTAMP; }
   timestamp_auto_set_type get_auto_set_type() const;
 };
 
@@ -830,7 +819,6 @@ class Field_year :public Field_tiny {
   bool send_binary(Protocol *protocol);
   void sql_type(String &str) const;
   bool can_be_compared_as_longlong() const { return TRUE; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_YEAR; }
 };
 
 
@@ -863,7 +851,6 @@ class Field_date :public Field_str {
   void sql_type(String &str) const;
   bool can_be_compared_as_longlong() const { return TRUE; }
   bool zero_pack() const { return 1; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_DATE; }
 };
 
 class Field_newdate :public Field_str {
@@ -895,7 +882,6 @@ class Field_newdate :public Field_str {
   bool zero_pack() const { return 1; }
   bool get_date(TIME *ltime,uint fuzzydate);
   bool get_time(TIME *ltime);
-  field_cast_enum field_cast_type() { return FIELD_CAST_NEWDATE; }
 };
 
 
@@ -931,7 +917,6 @@ class Field_time :public Field_str {
   void sql_type(String &str) const;
   bool can_be_compared_as_longlong() const { return TRUE; }
   bool zero_pack() const { return 1; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_TIME; }
 };
 
 
@@ -969,7 +954,6 @@ class Field_datetime :public Field_str {
   bool zero_pack() const { return 1; }
   bool get_date(TIME *ltime,uint fuzzydate);
   bool get_time(TIME *ltime);
-  field_cast_enum field_cast_type() { return FIELD_CAST_DATETIME; }
 };
 
 
@@ -1019,7 +1003,6 @@ class Field_string :public Field_longstr {
   bool has_charset(void) const
   { return charset() == &my_charset_bin ? FALSE : TRUE; }
   field_cast_enum field_cast_type() { return FIELD_CAST_STRING; }
-  Field *new_field(MEM_ROOT *root, struct st_table *new_table);
 };
 
 
@@ -1085,7 +1068,6 @@ class Field_varstring :public Field_longstr {
   enum_field_types real_type() const { return MYSQL_TYPE_VARCHAR; }
   bool has_charset(void) const
   { return charset() == &my_charset_bin ? FALSE : TRUE; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_VARSTRING; }
   Field *new_field(MEM_ROOT *root, struct st_table *new_table);
   Field *new_key_field(MEM_ROOT *root, struct st_table *new_table,
                        char *new_ptr, uchar *new_null_ptr,
@@ -1183,7 +1165,6 @@ class Field_blob :public Field_longstr {
   uint size_of() const { return sizeof(*this); }
   bool has_charset(void) const
   { return charset() == &my_charset_bin ? FALSE : TRUE; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_BLOB; }
   uint32 max_length();
 };
 
@@ -1213,7 +1194,6 @@ class Field_geom :public Field_blob {
   int  store(longlong nr) { return 1; }
   int  store_decimal(const my_decimal *) { return 1; }
   void get_key_image(char *buff,uint length,imagetype type);
-  field_cast_enum field_cast_type() { return FIELD_CAST_GEOM; }
 };
 #endif /*HAVE_SPATIAL*/
 
@@ -1258,7 +1238,6 @@ class Field_enum :public Field_str {
   bool has_charset(void) const { return TRUE; }
   /* enum and set are sorted as integers */
   CHARSET_INFO *sort_charset(void) const { return &my_charset_bin; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_ENUM; }
 };
 
 
@@ -1284,7 +1263,6 @@ class Field_set :public Field_enum {
   void sql_type(String &str) const;
   enum_field_types real_type() const { return FIELD_TYPE_SET; }
   bool has_charset(void) const { return TRUE; }
-  field_cast_enum field_cast_type() { return FIELD_CAST_SET; }
 };
 
 
@@ -1424,7 +1402,6 @@ enum_field_types get_blob_type_from_length(ulong length);
 uint32 calc_pack_length(enum_field_types type,uint32 length);
 int set_field_to_null(Field *field);
 int set_field_to_null_with_conversions(Field *field, bool no_conversions);
-bool field_types_to_be_kept(enum_field_types field_type);
 
 /*
   The following are for the interface with the .frm file

sql/item.h

@@ -1782,33 +1782,33 @@ class Item_cache_row: public Item_cache
 
 
 /*
-  Used to store type. name, length of Item for UNIONS & derived table
+  Item_type_holder used to store type. name, length of Item for UNIONS &
+  derived tables.
+
+  Item_type_holder do not need cleanup() because its time of live limited by
+  single SP/PS execution.
 */
 class Item_type_holder: public Item
 {
 protected:
-  Item_result item_type;
-  Item_result orig_type;
-  Field *field_example;
+  TYPELIB *enum_set_typelib;
+  enum_field_types fld_type;
+
+  void get_full_info(Item *item);
 public:
-  Item_type_holder(THD*, Item*, TABLE *);
+  Item_type_holder(THD*, Item*);
 
-  Item_result result_type () const { return item_type; }
+  Item_result result_type() const;
+  virtual enum_field_types field_type() const { return fld_type; };
   enum Type type() const { return TYPE_HOLDER; }
   double val_real();
   longlong val_int();
   my_decimal *val_decimal(my_decimal *);
   String *val_str(String*);
-  bool join_types(THD *thd, Item *, TABLE *);
-  Field *example() { return field_example; }
-  static uint32 real_length(Item *item);
-  void cleanup()
-  {
-    DBUG_ENTER("Item_type_holder::cleanup");
-    Item::cleanup();
-    item_type= orig_type;
-    DBUG_VOID_RETURN;
-  }
+  bool join_types(THD *thd, Item *);
+  Field *make_field_by_type(TABLE *table);
+  static uint32 display_length(Item *item);
+  static enum_field_types get_real_type(Item *);
 };
 
 

sql/item_func.h

@@ -54,7 +54,7 @@ class Item_func :public Item_result_field
 		  SP_POINTN,SP_GEOMETRYN,SP_INTERIORRINGN,
                   NOT_FUNC, NOT_ALL_FUNC,
                   NOW_FUNC, TRIG_COND_FUNC,
-                  GUSERVAR_FUNC};
+                  GUSERVAR_FUNC, VAR_VALUE_FUNC};
   enum optimize_type { OPTIMIZE_NONE,OPTIMIZE_KEY,OPTIMIZE_OP, OPTIMIZE_NULL,
                        OPTIMIZE_EQUAL };
   enum Type type() const { return FUNC_ITEM; }
@@ -1124,6 +1124,7 @@ class Item_func_get_user_var :public Item_func
     select @t1:=1,@t1,@t:="hello",@t from foo where (@t1:= t2.b)
   */
   enum_field_types field_type() const  { return MYSQL_TYPE_VARCHAR; }
+  enum Functype functype() const   { return VAR_VALUE_FUNC; }
   const char *func_name() const { return "get_user_var"; }
   bool const_item() const;
   table_map used_tables() const

sql/item_subselect.h

@@ -225,7 +225,8 @@ class Item_in_subselect :public Item_exists_subselect
 
   Item_in_subselect(Item * left_expr, st_select_lex *select_lex);
   Item_in_subselect()
-    :Item_exists_subselect(), abort_on_null(0), transformed(0), upper_item(0)
+    :Item_exists_subselect(), optimizer(0), abort_on_null(0), transformed(0),
+     upper_item(0)
   {}
 
   subs_type substype() { return IN_SUBS; }
@@ -236,8 +237,8 @@ class Item_in_subselect :public Item_exists_subselect
     was_null= 0;
   }
   trans_res select_transformer(JOIN *join);
-  trans_res single_value_transformer(JOIN *join,
-				     Comp_creator *func);
+  trans_res select_in_like_transformer(JOIN *join, Comp_creator *func);
+  trans_res single_value_transformer(JOIN *join, Comp_creator *func);
   trans_res row_value_transformer(JOIN * join);
   longlong val_int();
   double val_real();

sql/sql_derived.cc

@@ -115,7 +115,7 @@ int mysql_derived_prepare(THD *thd, LEX *lex, TABLE_LIST *orig_table_list)
       DBUG_RETURN(1); // out of memory
 
     // st_select_lex_unit::prepare correctly work for single select
-    if ((res= unit->prepare(thd, derived_result, 0)))
+    if ((res= unit->prepare(thd, derived_result, 0, org_table_list->alias)))
       goto exit;
 
 

sql/sql_lex.h

@@ -436,7 +436,8 @@ class st_select_lex_unit: public st_select_lex_node {
   void exclude_tree();
 
   /* UNION methods */
-  bool prepare(THD *thd, select_result *result, ulong additional_options);
+  bool prepare(THD *thd, select_result *result, ulong additional_options,
+               const char *tmp_table_alias);
   bool exec();
   bool cleanup();
   inline void unclean() { cleaned= 0; }

sql/sql_parse.cc

@@ -5529,9 +5529,7 @@ new_create_field(THD *thd, char *field_name, enum_field_types type,
 	my_error(ER_TOO_BIG_SET, MYF(0), field_name); /* purecov: inspected */
 	DBUG_RETURN(NULL);
       }
-      new_field->pack_length= (interval_list->elements + 7) / 8;
-      if (new_field->pack_length > 4)
-        new_field->pack_length=8;
+      new_field->pack_length= get_set_pack_length(interval_list->elements);
 
       List_iterator<String> it(*interval_list);
       String *tmp;
@@ -5548,7 +5546,7 @@ new_create_field(THD *thd, char *field_name, enum_field_types type,
   case FIELD_TYPE_ENUM:
     {
       // Should be safe
-      new_field->pack_length= interval_list->elements < 256 ? 1 : 2; 
+      new_field->pack_length= get_enum_pack_length(interval_list->elements);
 
       List_iterator<String> it(*interval_list);
       String *tmp;

sql/sql_prepare.cc

@@ -1166,7 +1166,7 @@ static int mysql_test_select(Prepared_statement *stmt,
     It is not SELECT COMMAND for sure, so setup_tables will be called as
     usual, and we pass 0 as setup_tables_done_option
   */
-  if (unit->prepare(thd, 0, 0))
+  if (unit->prepare(thd, 0, 0, ""))
   {
     goto err_prep;
   }
@@ -1318,7 +1318,7 @@ static bool select_like_stmt_test(Prepared_statement *stmt,
   thd->used_tables= 0;                        // Updated by setup_fields
 
   // JOIN::prepare calls
-  if (lex->unit.prepare(thd, 0, setup_tables_done_option))
+  if (lex->unit.prepare(thd, 0, setup_tables_done_option, ""))
   {
     res= TRUE;
   }

sql/sql_select.cc

@@ -7802,14 +7802,7 @@ Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
     return create_tmp_field_from_item(thd, item, table, copy_func, modify_item,
                                       convert_blob_length);
   case Item::TYPE_HOLDER:
-  {
-    Field *example= ((Item_type_holder *)item)->example();
-    if (example)
-      return create_tmp_field_from_field(thd, example, item->name, table, NULL,
-                                         convert_blob_length);
-    return create_tmp_field_from_item(thd, item, table, copy_func, 0,
-                                      convert_blob_length);
-  }
+    return ((Item_type_holder *)item)->make_field_by_type(table);
   default:					// Dosen't have to be stored
     return 0;
   }
@@ -10584,7 +10577,19 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit,
 	/* Found key that can be used to retrieve data in sorted order */
 	if (tab->ref.key >= 0)
 	{
-	  tab->ref.key= new_ref_key;
+          /*
+            We'll use ref access method on key new_ref_key. In general case 
+            the index search tuple for new_ref_key will be different (e.g.
+            when one of the indexes only covers prefix of the field, see
+            BUG#9213 in group_by.test).
+            So we build tab->ref from scratch here.
+          */
+          KEYUSE *keyuse= tab->keyuse;
+          while (keyuse->key != new_ref_key && keyuse->table == tab->table)
+            keyuse++;
+          if (create_ref_for_key(tab->join, tab, keyuse, 
+                                 tab->join->const_table_map))
+            DBUG_RETURN(0);
 	}
 	else
 	{
@@ -13188,7 +13193,8 @@ bool mysql_explain_union(THD *thd, SELECT_LEX_UNIT *unit, select_result *result)
     unit->fake_select_lex->select_number= UINT_MAX; // jost for initialization
     unit->fake_select_lex->type= "UNION RESULT";
     unit->fake_select_lex->options|= SELECT_DESCRIBE;
-    if (!(res= unit->prepare(thd, result, SELECT_NO_UNLOCK | SELECT_DESCRIBE)))
+    if (!(res= unit->prepare(thd, result, SELECT_NO_UNLOCK | SELECT_DESCRIBE,
+                             "")))
       res= unit->exec();
     res|= unit->cleanup();
   }

sql/sql_union.cc

@@ -30,7 +30,7 @@ bool mysql_union(THD *thd, LEX *lex, select_result *result,
   DBUG_ENTER("mysql_union");
   bool res;
   if (!(res= unit->prepare(thd, result, SELECT_NO_UNLOCK |
-                           setup_tables_done_option)))
+                           setup_tables_done_option, "")))
     res= unit->exec();
   if (!res && thd->cursor && thd->cursor->is_open())
   {
@@ -140,7 +140,8 @@ st_select_lex_unit::init_prepare_fake_select_lex(THD *thd)
 
 
 bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
-                                 ulong additional_options)
+                                 ulong additional_options,
+                                 const char *tmp_table_alias)
 {
   SELECT_LEX *lex_select_save= thd_arg->lex->current_select;
   SELECT_LEX *sl, *first_select;
@@ -255,7 +256,7 @@ bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
       while ((item_tmp= it++))
       {
 	/* Error's in 'new' will be detected after loop */
-	types.push_back(new Item_type_holder(thd_arg, item_tmp, empty_table));
+	types.push_back(new Item_type_holder(thd_arg, item_tmp));
       }
 
       if (thd_arg->is_fatal_error)
@@ -274,8 +275,7 @@ bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
       Item *type, *item_tmp;
       while ((type= tp++, item_tmp= it++))
       {
-        if (((Item_type_holder*)type)->join_types(thd_arg, item_tmp,
-                                                  empty_table))
+        if (((Item_type_holder*)type)->join_types(thd_arg, item_tmp))
 	  DBUG_RETURN(TRUE);
       }
     }
@@ -308,7 +308,7 @@ bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
 				  (first_select_in_union()->options |
 				   thd_arg->options |
 				   TMP_TABLE_ALL_COLUMNS),
-				  HA_POS_ERROR, (char*) "")))
+				  HA_POS_ERROR, (char *) tmp_table_alias)))
       goto err;
     table->file->extra(HA_EXTRA_WRITE_CACHE);
     table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);

support-files/mysql.server.sh

@@ -99,10 +99,12 @@ parse_manager_arguments() {
 }
 
 wait_for_pid () {
-  for((i=0; i<35; i++)); do
+  i=0
+  while test $i -lt 35 ; do
     sleep 1
     test -s $pid_file && i='' && break
     echo $echo_n ".$echo_c"
+    i=`expr $i + 1`
   done
 
   if test -z "$i" ; then