Merge 4.1 -> 5.0

heap/hp_create.c:
  Auto merged
mysql-test/mysql-test-run.sh:
  Auto merged
mysql-test/r/ctype_utf8.result:
  Auto merged
mysql-test/r/olap.result:
  Auto merged
mysql-test/t/func_str.test:
  Auto merged
sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_strfunc.cc:
  Auto merged
sql/key.cc:
  Auto merged
sql/set_var.cc:
  Auto merged
sql/sql_select.h:
  Auto merged
sql/sql_string.h:
  Auto merged
client/mysqldump.c:
  Manual merge
mysql-test/r/func_gconcat.result:
  Manual merge
mysql-test/r/func_str.result:
  Manual merge
mysql-test/t/func_gconcat.test:
  Manual merge
sql/ha_heap.cc:
  Manual merge
sql/sql_select.cc:
  Manual merge

client/mysqldump.c

@@ -875,8 +875,8 @@ static int dbConnect(char *host, char *user,char *passwd)
     cannot reconnect.
   */
   sock->reconnect= 0;
-  sprintf(buff, "/*!40100 SET @@SQL_MODE='%s' */",
-	  compatible_mode_normal_str);
+  my_snprintf(buff, sizeof(buff), "/*!40100 SET @@SQL_MODE='%s' */",
+	      compatible_mode_normal_str);
   if (mysql_query_with_error_report(sock, 0, buff))
   {
     mysql_close(sock);
@@ -1111,8 +1111,9 @@ static uint getTableStructure(char *table, char* db)
   if (verbose)
     fprintf(stderr, "-- Retrieving table structure for table %s...\n", table);
 
-  sprintf(insert_pat,"SET OPTION SQL_QUOTE_SHOW_CREATE=%d",
-	  (opt_quoted || opt_keywords));
+  my_snprintf(insert_pat, sizeof(insert_pat), 
+	      "SET OPTION SQL_QUOTE_SHOW_CREATE=%d",
+	      (opt_quoted || opt_keywords));
   if (!create_options)
     strmov(strend(insert_pat), "/*!40102 ,SQL_MODE=concat(@@sql_mode, _utf8 ',NO_KEY_OPTIONS,NO_TABLE_OPTIONS,NO_FIELD_OPTIONS') */");
 
@@ -1131,7 +1132,7 @@ static uint getTableStructure(char *table, char* db)
       char buff[20+FN_REFLEN];
       MYSQL_FIELD *field;
 
-      sprintf(buff,"show create table %s", result_table);
+      my_snprintf(buff, sizeof(buff), "show create table %s", result_table);
       if (mysql_query_with_error_report(sock, 0, buff))
       {
         safe_exit(EX_MYSQLERR);
@@ -1177,7 +1178,8 @@ static uint getTableStructure(char *table, char* db)
       check_io(sql_file);
       mysql_free_result(tableRes);
     }
-    sprintf(insert_pat,"show fields from %s", result_table);
+    my_snprintf(insert_pat, sizeof(insert_pat), "show fields from %s", 
+		result_table);
     if (mysql_query_with_error_report(sock, &tableRes, insert_pat))
     {
       if (path)
@@ -1187,11 +1189,12 @@ static uint getTableStructure(char *table, char* db)
     }
 
     if (cFlag)
-      sprintf(insert_pat, "INSERT %sINTO %s (", delayed, opt_quoted_table);
+      my_snprintf(insert_pat, sizeof(insert_pat), "INSERT %sINTO %s (", 
+		  delayed, opt_quoted_table);
     else
     {
-      sprintf(insert_pat, "INSERT %sINTO %s VALUES ", delayed,
-	      opt_quoted_table);
+      my_snprintf(insert_pat, sizeof(insert_pat), "INSERT %sINTO %s VALUES ", 
+		  delayed, opt_quoted_table);
       if (!extended_insert)
         strcat(insert_pat,"(");
     }
@@ -1218,7 +1221,8 @@ static uint getTableStructure(char *table, char* db)
               "%s: Warning: Can't set SQL_QUOTE_SHOW_CREATE option (%s)\n",
               my_progname, mysql_error(sock));
 
-    sprintf(insert_pat,"show fields from %s", result_table);
+    my_snprintf(insert_pat, sizeof(insert_pat), "show fields from %s", 
+		result_table);
     if (mysql_query_with_error_report(sock, &tableRes, insert_pat))
     {
       safe_exit(EX_MYSQLERR);
@@ -1253,10 +1257,12 @@ static uint getTableStructure(char *table, char* db)
       check_io(sql_file);
     }
     if (cFlag)
-      sprintf(insert_pat, "INSERT %sINTO %s (", delayed, result_table);
+      my_snprintf(insert_pat, sizeof(insert_pat), "INSERT %sINTO %s (", 
+		  delayed, result_table);
     else
     {
-      sprintf(insert_pat, "INSERT %sINTO %s VALUES ", delayed, result_table);
+      my_snprintf(insert_pat, sizeof(insert_pat), "INSERT %sINTO %s VALUES ",
+		  delayed, result_table);
       if (!extended_insert)
         strcat(insert_pat,"(");
     }
@@ -1313,7 +1319,7 @@ static uint getTableStructure(char *table, char* db)
       /* Make an sql-file, if path was given iow. option -T was given */
       char buff[20+FN_REFLEN];
       uint keynr,primary_key;
-      sprintf(buff,"show keys from %s", result_table);
+      my_snprintf(buff, sizeof(buff), "show keys from %s", result_table);
       if (mysql_query_with_error_report(sock, &tableRes, buff))
       {
         if (mysql_errno(sock) == ER_WRONG_OBJECT)
@@ -1391,8 +1397,12 @@ static uint getTableStructure(char *table, char* db)
       if (create_options)
       {
 	char show_name_buff[FN_REFLEN];
-        sprintf(buff,"show table status like %s",
-		quote_for_like(table, show_name_buff));
+
+	/* Check memory for quote_for_like() */
+	DBUG_ASSERT(2*sizeof(table) < sizeof(show_name_buff));
+        my_snprintf(buff, sizeof(buff), "show table status like %s",
+		    quote_for_like(table, show_name_buff));
+
         if (mysql_query_with_error_report(sock, &tableRes, buff))
         {
 	  if (mysql_errno(sock) != ER_PARSE_ERROR)
@@ -1553,8 +1563,9 @@ static void dumpTable(uint numFields, char *table)
     my_delete(filename, MYF(0)); /* 'INTO OUTFILE' doesn't work, if
 				    filename wasn't deleted */
     to_unix_path(filename);
-    sprintf(query, "SELECT /*!40001 SQL_NO_CACHE */ * INTO OUTFILE '%s'",
-	    filename);
+    my_snprintf(query, QUERY_LENGTH, 
+		"SELECT /*!40001 SQL_NO_CACHE */ * INTO OUTFILE '%s'",
+		filename);
     end= strend(query);
 
     if (fields_terminated || enclosed || opt_enclosed || escaped)
@@ -1566,7 +1577,7 @@ static void dumpTable(uint numFields, char *table)
     end= add_load_option(end, lines_terminated, " LINES TERMINATED BY");
     *end= '\0';
 
-    sprintf(buff," FROM %s", result_table);
+    my_snprintf(buff, sizeof(buff), " FROM %s", result_table);
     end= strmov(end,buff);
     if (where || order_by)
     {
@@ -1594,8 +1605,9 @@ static void dumpTable(uint numFields, char *table)
 	      result_table);
       check_io(md_result_file);
     }
-    sprintf(query, "SELECT /*!40001 SQL_NO_CACHE */ * FROM %s",
-	    result_table);
+    my_snprintf(query, QUERY_LENGTH,
+		"SELECT /*!40001 SQL_NO_CACHE */ * FROM %s",
+		result_table);
     if (where || order_by)
     {
       query = alloc_query_str((ulong) (strlen(query) + 1 +
@@ -1693,8 +1705,9 @@ static void dumpTable(uint numFields, char *table)
         int is_blob;
 	if (!(field = mysql_fetch_field(res)))
 	{
-	  sprintf(query,"%s: Not enough fields from table %s! Aborting.\n",
-		  my_progname, result_table);
+	  my_snprintf(query, QUERY_LENGTH,
+		      "%s: Not enough fields from table %s! Aborting.\n",
+		      my_progname, result_table);
 	  fputs(query,stderr);
 	  error= EX_CONSCHECK;
 	  goto err;
@@ -1896,12 +1909,13 @@ static void dumpTable(uint numFields, char *table)
     check_io(md_result_file);
     if (mysql_errno(sock))
     {
-      sprintf(query,"%s: Error %d: %s when dumping table %s at row: %ld\n",
-	      my_progname,
-	      mysql_errno(sock),
-	      mysql_error(sock),
-	      result_table,
-	      rownr);
+      my_snprintf(query, QUERY_LENGTH,
+		  "%s: Error %d: %s when dumping table %s at row: %ld\n",
+		  my_progname,
+		  mysql_errno(sock),
+		  mysql_error(sock),
+		  result_table,
+		  rownr);
       fputs(query,stderr);
       error= EX_CONSCHECK;
       goto err;
@@ -2045,8 +2059,9 @@ static int init_dumping(char *database)
         MYSQL_ROW row;
         MYSQL_RES *dbinfo;
 
-        sprintf(qbuf,"SHOW CREATE DATABASE IF NOT EXISTS %s",
-		qdatabase);
+        my_snprintf(qbuf, sizeof(qbuf), 
+		    "SHOW CREATE DATABASE IF NOT EXISTS %s",
+		    qdatabase);
 
         if (mysql_query(sock, qbuf) || !(dbinfo = mysql_store_result(sock)))
         {
@@ -2141,6 +2156,7 @@ static int dump_all_tables_in_db(char *database)
   return 0;
 } /* dump_all_tables_in_db */
 
+
 /*
    dump structure of views of database
 
@@ -2195,6 +2211,7 @@ static my_bool dump_all_views_in_db(char *database)
   return 0;
 } /* dump_all_tables_in_db */
 
+
 /*
   get_actual_table_name -- executes a SHOW TABLES LIKE '%s' to get the actual 
   table name from the server for the table name given on the command line.  
@@ -2211,10 +2228,15 @@ static void get_actual_table_name(const char *old_table_name,
 {
   MYSQL_RES  *tableRes;
   MYSQL_ROW  row;
-  char query[ NAME_LEN + 50 ];
+  char query[50 + 2*NAME_LEN];
+  char show_name_buff[FN_REFLEN];
   DBUG_ENTER("get_actual_table_name");
 
-  sprintf( query, "SHOW TABLES LIKE '%s'", old_table_name);
+  /* Check memory for quote_for_like() */
+  DBUG_ASSERT(2*sizeof(old_table_name) < sizeof(show_name_buff));
+  my_snprintf(query, sizeof(query), "SHOW TABLES LIKE %s", 
+	      quote_for_like(old_table_name, show_name_buff));
+
   if (mysql_query_with_error_report(sock, 0, query))
   {
     safe_exit(EX_MYSQLERR);
@@ -2464,8 +2486,10 @@ static const char *check_if_ignore_table(const char *table_name)
   MYSQL_ROW row;
   const char *result= 0;
 
-  sprintf(buff,"show table status like %s",
-	  quote_for_like(table_name, show_name_buff));
+  /* Check memory for quote_for_like() */
+  DBUG_ASSERT(2*sizeof(table_name) < sizeof(show_name_buff));
+  my_snprintf(buff, sizeof(buff), "show table status like %s",
+	      quote_for_like(table_name, show_name_buff));
   if (mysql_query_with_error_report(sock, &res, buff))
   {
     if (mysql_errno(sock) != ER_PARSE_ERROR)
@@ -2523,7 +2547,8 @@ static char *primary_key_fields(const char *table_name)
   uint result_length = 0;
   char *result = 0;
 
-  sprintf(show_keys_buff, "SHOW KEYS FROM %s", table_name);
+  my_snprintf(show_keys_buff, sizeof(show_keys_buff), 
+	      "SHOW KEYS FROM %s", table_name);
   if (mysql_query(sock, show_keys_buff) ||
       !(res = mysql_store_result(sock)))
   {

heap/hp_create.c

@@ -168,8 +168,6 @@ int heap_create(const char *name, uint keys, HP_KEYDEF *keydef,
 	keyinfo->write_key= hp_write_key;
         keyinfo->hash_buckets= 0;
       }
-      if ((keyinfo->flag & HA_AUTO_KEY) && create_info->with_auto_increment)
-        share->auto_key= i + 1;
     }
     share->min_records= min_records;
     share->max_records= max_records;
@@ -180,6 +178,7 @@ int heap_create(const char *name, uint keys, HP_KEYDEF *keydef,
     share->keys= keys;
     share->max_key_length= max_length;
     share->changed= 0;
+    share->auto_key= create_info->auto_key;
     share->auto_key_type= create_info->auto_key_type;
     share->auto_increment= create_info->auto_increment;
     /* Must be allocated separately for rename to work */

include/heap.h

@@ -181,8 +181,10 @@ typedef struct st_heap_info
   LIST open_list;
 } HP_INFO;
 
+
 typedef struct st_heap_create_info
 {
+  uint auto_key;                        /* keynr [1 - maxkey] for auto key */
   uint auto_key_type;
   ulong max_table_size;
   ulonglong auto_increment;

mysql-test/mysql-test-run.sh

@@ -432,10 +432,10 @@ while test $# -gt 0; do
       TMP=`$ECHO "$1" | $SED -e "s;--valgrind-options=;;"`
       VALGRIND="$VALGRIND $TMP"
       ;;
-    --skip-ndbcluster)
+    --skip-ndbcluster | --skip-ndb)
       USE_NDBCLUSTER=""
-      EXTRA_MASTER_MYSQLD_OPT="$EXTRA_MASTER_MYSQLD_OPT $1"
-      EXTRA_SLAVE_MYSQLD_OPT="$EXTRA_SLAVE_MYSQLD_OPT $1"
+      EXTRA_MASTER_MYSQLD_OPT="$EXTRA_MASTER_MYSQLD_OPT --skip-ndbcluster"
+      EXTRA_SLAVE_MYSQLD_OPT="$EXTRA_SLAVE_MYSQLD_OPT --skip-ndbcluster"
       ;;
     --skip-*)
       EXTRA_MASTER_MYSQLD_OPT="$EXTRA_MASTER_MYSQLD_OPT $1"

mysql-test/r/ctype_utf8.result

@@ -861,6 +861,13 @@ user	c
 one	<one>
 two	<two>
 DROP TABLE t1;
+create table t1 (f1 varchar(1) not null) default charset utf8;
+insert into t1 values (''), ('');
+select concat(concat(_latin1'->',f1),_latin1'<-') from t1;
+concat(concat(_latin1'->',f1),_latin1'<-')
+-><-
+-><-
+drop table t1;
 select convert(_koi8r'' using utf8) < convert(_koi8r'' using utf8);
 convert(_koi8r'' using utf8) < convert(_koi8r'' using utf8)
 1

mysql-test/r/func_gconcat.result

@@ -469,3 +469,11 @@ group_concat(a)
 ABW
 ABW
 drop table t1;
+create table r2 (a int, b int);
+insert into r2 values (1,1), (2,2);
+select  b x, (select group_concat(x) from r2) from  r2;
+x	(select group_concat(x) from r2)
+1	1,1
+2	2,2
+drop table r2;
+

mysql-test/r/func_str.result

@@ -515,7 +515,7 @@ collation(make_set(255,_latin2'a',_latin2'b',_latin2'c'))	coercibility(make_set(
 latin2_general_ci	4
 select collation(export_set(255,_latin2'y',_latin2'n',_latin2' ')), coercibility(export_set(255,_latin2'y',_latin2'n',_latin2' '));
 collation(export_set(255,_latin2'y',_latin2'n',_latin2' '))	coercibility(export_set(255,_latin2'y',_latin2'n',_latin2' '))
-binary	4
+latin2_general_ci	4
 select collation(trim(_latin2' a ')), coercibility(trim(_latin2' a '));
 collation(trim(_latin2' a '))	coercibility(trim(_latin2' a '))
 latin2_general_ci	4
@@ -630,6 +630,15 @@ t1	CREATE TABLE `t1` (
   `encode('abcd','ab')` varbinary(4) NOT NULL default ''
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 drop table t1;
+create table t1 (a char character set latin2);
+insert into t1 values (null);
+select charset(a), collation(a), coercibility(a) from t1;
+charset(a)	collation(a)	coercibility(a)
+latin2	latin2_general_ci	2
+drop table t1;
+select charset(null), collation(null), coercibility(null);
+charset(null)	collation(null)	coercibility(null)
+binary	binary	5
 select SUBSTR('abcdefg',3,2);
 SUBSTR('abcdefg',3,2)
 cd
@@ -683,16 +692,16 @@ drop table t1, t2;
 create table t1 (c1 INT, c2 INT UNSIGNED);
 insert into t1 values ('21474836461','21474836461');
 Warnings:
-Warning	1264	Out of range value adjusted for column 'c1' at row 1
-Warning	1264	Out of range value adjusted for column 'c2' at row 1
+Warning	1265	Data truncated for column 'c1' at row 1
+Warning	1265	Data truncated for column 'c2' at row 1
 insert into t1 values ('-21474836461','-21474836461');
 Warnings:
-Warning	1264	Out of range value adjusted for column 'c1' at row 1
-Warning	1264	Out of range value adjusted for column 'c2' at row 1
+Warning	1265	Data truncated for column 'c1' at row 1
+Warning	1265	Data truncated for column 'c2' at row 1
 show warnings;
 Level	Code	Message
-Warning	1264	Out of range value adjusted for column 'c1' at row 1
-Warning	1264	Out of range value adjusted for column 'c2' at row 1
+Warning	1265	Data truncated for column 'c1' at row 1
+Warning	1265	Data truncated for column 'c2' at row 1
 select * from t1;
 c1	c2
 2147483647	4294967295

mysql-test/r/olap.result

@@ -307,3 +307,75 @@ day	sample	not_cancelled
 2004-06-07	1	0
 NULL	3	1
 DROP TABLE user_day;
+CREATE TABLE t1 (a int, b int);
+INSERT INTO t1 VALUES
+(1,4),
+(2,2), (2,2),
+(4,1), (4,1), (4,1), (4,1),
+(2,1), (2,1);
+SELECT SUM(b) FROM t1 GROUP BY a WITH ROLLUP;
+SUM(b)
+4
+6
+4
+14
+SELECT DISTINCT SUM(b) FROM t1 GROUP BY a WITH ROLLUP;
+SUM(b)
+4
+6
+14
+SELECT SUM(b), COUNT(DISTINCT b) FROM t1 GROUP BY a WITH ROLLUP;
+SUM(b)	COUNT(DISTINCT b)
+4	1
+6	2
+4	1
+14	3
+SELECT DISTINCT SUM(b), COUNT(DISTINCT b) FROM t1 GROUP BY a WITH ROLLUP;
+SUM(b)	COUNT(DISTINCT b)
+4	1
+6	2
+14	3
+SELECT SUM(b), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP;
+SUM(b)	COUNT(*)
+4	1
+6	4
+4	4
+14	9
+SELECT DISTINCT SUM(b), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP;
+SUM(b)	COUNT(*)
+4	1
+6	4
+4	4
+14	9
+SELECT SUM(b), COUNT(DISTINCT b), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP;
+SUM(b)	COUNT(DISTINCT b)	COUNT(*)
+4	1	1
+6	2	4
+4	1	4
+14	3	9
+SELECT DISTINCT SUM(b), COUNT(DISTINCT b), COUNT(*) FROM t1
+GROUP BY a WITH ROLLUP;
+SUM(b)	COUNT(DISTINCT b)	COUNT(*)
+4	1	1
+6	2	4
+4	1	4
+14	3	9
+SELECT a, sum(b) FROM t1 GROUP BY a,b WITH ROLLUP;
+a	sum(b)
+1	4
+1	4
+2	2
+2	4
+2	6
+4	4
+4	4
+NULL	14
+SELECT DISTINCT a, sum(b) FROM t1 GROUP BY a,b WITH ROLLUP;
+a	sum(b)
+1	4
+2	2
+2	4
+2	6
+4	4
+NULL	14
+DROP TABLE t1;

mysql-test/r/rpl000005.result

@@ -4,6 +4,9 @@ reset master;
 reset slave;
 drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
 start slave;
+SHOW VARIABLES LIKE 'relay_log_space_limit';
+Variable_name	Value
+relay_log_space_limit	0
 CREATE TABLE t1 (name varchar(64), age smallint(3));
 INSERT INTO  t1 SET name='Andy', age=31;
 INSERT t1 SET name='Jacob', age=2;

mysql-test/r/update.result

@@ -219,3 +219,10 @@ select * from t1;
 id	id_str
 1	test1
 drop table t1;
+create table t1 (a int, b char(255), key(a, b(20)));
+insert into t1 values (0, '1');
+update t1 set b = b + 1 where a = 0;
+select * from t1;
+a	b
+0	2
+drop table t1;

mysql-test/t/ctype_utf8.test

@@ -694,6 +694,15 @@ SELECT CHARSET('a');
 SELECT user, CONCAT('<', user, '>') AS c FROM t1;
 DROP TABLE t1;
 
+#
+# Bug#8785
+# the same problem with the above, but with nested CONCATs
+#
+create table t1 (f1 varchar(1) not null) default charset utf8;
+insert into t1 values (''), ('');
+select concat(concat(_latin1'->',f1),_latin1'<-') from t1;
+drop table t1;
+
 #
 # Bug#8385: utf8_general_ci treats Cyrillic letters I and SHORT I as the same
 #

mysql-test/t/func_gconcat.test

@@ -288,8 +288,16 @@ DROP TABLE t1;
 #
 # Bug #6475
 #
-
 create table t1 (a char(3), b char(20), primary key (a, b));
 insert into t1 values ('ABW', 'Dutch'), ('ABW', 'English');
 select group_concat(a) from t1 group by b;
 drop table t1;
+
+#
+# Bug #8656: Crash with group_concat on alias in outer table
+#
+create table r2 (a int, b int);
+insert into r2 values (1,1), (2,2);
+select  b x, (select group_concat(x) from r2) from  r2;
+drop table r2;
+

mysql-test/t/func_str.test

@@ -369,6 +369,15 @@ select
 show create table t1;
 drop table t1;
 
+#
+# Bug#9129
+#
+create table t1 (a char character set latin2);
+insert into t1 values (null);
+select charset(a), collation(a), coercibility(a) from t1;
+drop table t1;
+select charset(null), collation(null), coercibility(null);
+
 #
 # test for SUBSTR
 #

mysql-test/t/olap.test

@@ -125,3 +125,33 @@ SELECT
 
 DROP TABLE user_day;
 
+#
+# Tests for bugs #8616, #8615: distinct sum with rollup
+#
+
+CREATE TABLE t1 (a int, b int);
+
+INSERT INTO t1 VALUES
+  (1,4),
+  (2,2), (2,2),
+  (4,1), (4,1), (4,1), (4,1),
+  (2,1), (2,1);
+
+SELECT SUM(b) FROM t1 GROUP BY a WITH ROLLUP;
+SELECT DISTINCT SUM(b) FROM t1 GROUP BY a WITH ROLLUP;
+
+SELECT SUM(b), COUNT(DISTINCT b) FROM t1 GROUP BY a WITH ROLLUP;
+SELECT DISTINCT SUM(b), COUNT(DISTINCT b) FROM t1 GROUP BY a WITH ROLLUP;
+
+SELECT SUM(b), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP;
+SELECT DISTINCT SUM(b), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP;
+
+SELECT SUM(b), COUNT(DISTINCT b), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP;
+SELECT DISTINCT SUM(b), COUNT(DISTINCT b), COUNT(*) FROM t1
+  GROUP BY a WITH ROLLUP;
+
+SELECT a, sum(b) FROM t1 GROUP BY a,b WITH ROLLUP;
+SELECT DISTINCT a, sum(b) FROM t1 GROUP BY a,b WITH ROLLUP;
+
+DROP TABLE t1;
+

mysql-test/t/rpl000005.test

 source include/master-slave.inc;
 
+#
+# Bug#7100 relay_log_space_max missing from SHOW VARIABLES
+#
+SHOW VARIABLES LIKE 'relay_log_space_limit';
+
 CREATE TABLE t1 (name varchar(64), age smallint(3));
 INSERT INTO  t1 SET name='Andy', age=31;
 INSERT t1 SET name='Jacob', age=2;

mysql-test/t/update.test

@@ -179,3 +179,13 @@ insert into t1 (id_str) values ("test");
 update t1 set id_str = concat(id_str, id) where id = last_insert_id();
 select * from t1;
 drop table t1;
+
+#
+# Bug #8942: a problem with update and partial key part
+#
+
+create table t1 (a int, b char(255), key(a, b(20)));
+insert into t1 values (0, '1');
+update t1 set b = b + 1 where a = 0;
+select * from t1;
+drop table t1;

sql/ha_heap.cc

@@ -521,9 +521,17 @@ int ha_heap::create(const char *name, TABLE *table_arg,
 	seg->null_bit= 0;
 	seg->null_pos= 0;
       }
-      // We have to store field->key_type() as seg->type can differ from it
-      if (field->flags & AUTO_INCREMENT_FLAG)
+      if (field->flags & AUTO_INCREMENT_FLAG &&
+          table_arg->found_next_number_field &&
+          key == table_arg->next_number_index)
+      {
+        /*
+          Store key number and type for found auto_increment key
+          We have to store type as seg->type can differ from it
+        */
+        auto_key= key+ 1;
 	auto_key_type= field->key_type();
+      }
     }
   }
   mem_per_row+= MY_ALIGN(share->reclength + 1, sizeof(char*));
@@ -535,8 +543,8 @@ int ha_heap::create(const char *name, TABLE *table_arg,
     found_real_auto_increment= share->next_number_key_offset == 0;
   }
   HP_CREATE_INFO hp_create_info;
+  hp_create_info.auto_key= auto_key;
   hp_create_info.auto_key_type= auto_key_type;
-  hp_create_info.with_auto_increment= found_real_auto_increment;
   hp_create_info.auto_increment= (create_info->auto_increment_value ?
 				  create_info->auto_increment_value - 1 : 0);
   hp_create_info.max_table_size=current_thd->variables.max_heap_table_size;

sql/item.cc

@@ -586,6 +586,18 @@ Item *Item_string::safe_charset_converter(CHARSET_INFO *tocs)
     return NULL;
   }
   conv->str_value.copy();
+  /* 
+    The above line executes str_value.realloc() internally,
+    which alligns Alloced_length using ALLIGN_SIZE.
+    In the case of Item_string::str_value we don't want
+    Alloced_length to be longer than str_length.
+    Otherwise, some functions like Item_func_concat::val_str()
+    try to reuse str_value as a buffer for concatenation result
+    for optimization purposes, so our string constant become
+    corrupted. See bug#8785 for more details.
+    Let's shrink Alloced_length to str_length to avoid this problem.
+  */
+  conv->str_value.shrink_to_length();
   return conv;
 }
 

sql/item.h

@@ -790,6 +790,17 @@ class Item_null :public Item
   Item *safe_charset_converter(CHARSET_INFO *tocs);
 };
 
+class Item_null_result :public Item_null
+{
+public:
+  Field *result_field;
+  Item_null_result() : Item_null(), result_field(0) {}
+  bool is_result_field() { return result_field != 0; }
+  void save_in_result_field(bool no_conversions)
+  {
+    save_in_field(result_field, no_conversions);
+  }
+};  
 
 /* Item represents one placeholder ('?') of prepared statement */
 
@@ -1274,6 +1285,7 @@ class Item_ref :public Item_ident
   void save_org_in_field(Field *field)	{ (*ref)->save_org_in_field(field); }
   enum Item_result result_type () const { return (*ref)->result_type(); }
   enum_field_types field_type() const   { return (*ref)->field_type(); }
+  Field *get_tmp_table_field() { return result_field; }
   table_map used_tables() const		
   { 
     return depended_from ? OUTER_REF_TABLE_BIT : (*ref)->used_tables(); 

sql/item_func.cc

@@ -2096,11 +2096,6 @@ longlong Item_func_char_length::val_int()
 longlong Item_func_coercibility::val_int()
 {
   DBUG_ASSERT(fixed == 1);
-  if (args[0]->null_value)
-  {
-    null_value= 1;
-    return 0;
-  }
   null_value= 0;
   return (longlong) args[0]->collation.derivation;
 }

sql/item_strfunc.cc

@@ -267,8 +267,7 @@ String *Item_func_concat::val_str(String *str)
 			    current_thd->variables.max_allowed_packet);
 	goto null;
       }
-      if (!args[0]->const_item() && 
-          res->alloced_length() >= res->length()+res2->length())
+      if (res->alloced_length() >= res->length()+res2->length())
       {						// Use old buffer
 	res->append(*res2);
       }
@@ -2308,12 +2307,11 @@ void Item_func_set_collation::print(String *str)
 String *Item_func_charset::val_str(String *str)
 {
   DBUG_ASSERT(fixed == 1);
-  String *res = args[0]->val_str(str);
   uint dummy_errors;
 
-  if ((null_value=(args[0]->null_value || !res->charset())))
-    return 0;
-  str->copy(res->charset()->csname,strlen(res->charset()->csname),
+  CHARSET_INFO *cs= args[0]->collation.collation; 
+  null_value= 0;
+  str->copy(cs->csname, strlen(cs->csname),
 	    &my_charset_latin1, collation.collation, &dummy_errors);
   return str;
 }
@@ -2321,12 +2319,11 @@ String *Item_func_charset::val_str(String *str)
 String *Item_func_collation::val_str(String *str)
 {
   DBUG_ASSERT(fixed == 1);
-  String *res = args[0]->val_str(str);
   uint dummy_errors;
+  CHARSET_INFO *cs= args[0]->collation.collation; 
 
-  if ((null_value=(args[0]->null_value || !res->charset())))
-    return 0;
-  str->copy(res->charset()->name,strlen(res->charset()->name),
+  null_value= 0;
+  str->copy(cs->name, strlen(cs->name),
 	    &my_charset_latin1, collation.collation, &dummy_errors);
   return str;
 }
@@ -2490,6 +2487,7 @@ String* Item_func_export_set::val_str(String* str)
   uint num_set_values = 64;
   ulonglong mask = 0x1;
   str->length(0);
+  str->set_charset(collation.collation);
 
   /* Check if some argument is a NULL value */
   if (args[0]->null_value || args[1]->null_value || args[2]->null_value)

sql/key.cc

@@ -368,7 +368,7 @@ bool check_if_key_used(TABLE *table, uint idx, List<Item> &fields)
     f.rewind();
     while ((field=(Item_field*) f++))
     {
-      if (key_part->field == field->field)
+      if (key_part->field->eq(field->field))
 	return 1;
     }
   }

sql/set_var.cc

@@ -926,6 +926,7 @@ struct show_var_st init_vars[]= {
   {sys_read_rnd_buff_size.name,(char*) &sys_read_rnd_buff_size,	    SHOW_SYS},
 #ifdef HAVE_REPLICATION
   {sys_relay_log_purge.name,  (char*) &sys_relay_log_purge,         SHOW_SYS},
+  {"relay_log_space_limit",  (char*) &relay_log_space_limit,        SHOW_LONGLONG},
 #endif
   {sys_rpl_recovery_rank.name,(char*) &sys_rpl_recovery_rank,       SHOW_SYS},
   {"secure_auth",             (char*) &sys_secure_auth,             SHOW_SYS},

sql/sql_select.cc

@@ -191,7 +191,7 @@ static bool change_refs_to_tmp_fields(THD *thd, Item **ref_pointer_array,
 				      uint elements, List<Item> &items);
 static void init_tmptable_sum_functions(Item_sum **func);
 static void update_tmptable_sum_func(Item_sum **func,TABLE *tmp_table);
-static void copy_sum_funcs(Item_sum **func_ptr);
+static void copy_sum_funcs(Item_sum **func_ptr, Item_sum **end);
 static bool add_ref_to_table_cond(THD *thd, JOIN_TAB *join_tab);
 static bool setup_sum_funcs(THD *thd, Item_sum **func_ptr);
 static bool init_sum_functions(Item_sum **func, Item_sum **end);
@@ -1386,7 +1386,6 @@ JOIN::exec()
 	{
 	  DBUG_VOID_RETURN;
 	}
-	curr_join->group_list= 0;
       }
       
       thd->proc_info="Copying to group table";
@@ -1447,7 +1446,7 @@ JOIN::exec()
       if (curr_join->tmp_having)
 	curr_join->tmp_having->update_used_tables();
       if (remove_duplicates(curr_join, curr_tmp_table,
-			    curr_join->fields_list, curr_join->tmp_having))
+			    *curr_fields_list, curr_join->tmp_having))
 	DBUG_VOID_RETURN;
       curr_join->tmp_having=0;
       curr_join->select_distinct=0;
@@ -10132,26 +10131,32 @@ end_write_group(JOIN *join, JOIN_TAB *join_tab __attribute__((unused)),
     {
       if (join->procedure)
 	join->procedure->end_group();
-      if (idx < (int) join->send_group_parts)
+      int send_group_parts= join->send_group_parts;
+      if (idx < send_group_parts)
       {
 	if (!join->first_record)
 	{
 	  /* No matching rows for group function */
 	  join->clear();
 	}
-	copy_sum_funcs(join->sum_funcs);
-	if (!join->having || join->having->val_int())
+        copy_sum_funcs(join->sum_funcs,
+                       join->sum_funcs_end[send_group_parts]);
+	if (join->having && join->having->val_int() == 0)
+          error= -1;
+        else if ((error=table->file->write_row(table->record[0])))
 	{
-	  if ((error=table->file->write_row(table->record[0])))
-	  {
-	    if (create_myisam_from_heap(join->thd, table,
-					&join->tmp_table_param,
-					error, 0))
-	      DBUG_RETURN(-1);			// Not a table_is_full error
-	  }
-	  else
-	    join->send_records++;
+	  if (create_myisam_from_heap(join->thd, table,
+				      &join->tmp_table_param,
+				      error, 0))
+	    DBUG_RETURN(-1);		       
+        }
+        if (join->rollup.state != ROLLUP::STATE_NONE && error <= 0)
+	{
+	  if (join->rollup_write_data((uint) (idx+1), table))
+	    error= 1;
 	}
+	if (error > 0)
+	  DBUG_RETURN(-1);	  
 	if (end_of_records)
 	  DBUG_RETURN(0);
       }
@@ -12413,11 +12418,10 @@ update_tmptable_sum_func(Item_sum **func_ptr,
 	/* Copy result of sum functions to record in tmp_table */
 
 static void
-copy_sum_funcs(Item_sum **func_ptr)
+copy_sum_funcs(Item_sum **func_ptr, Item_sum **end_ptr)
 {
-  Item_sum *func;
-  for (; (func = *func_ptr) ; func_ptr++)
-    (void) func->save_in_result_field(1);
+  for (; func_ptr != end_ptr ; func_ptr++)
+    (void) (*func_ptr)->save_in_result_field(1);
   return;
 }
 
@@ -12539,14 +12543,16 @@ bool JOIN::rollup_init()
   */
   tmp_table_param.group_parts= send_group_parts;
 
-  if (!(rollup.fields= (List<Item>*) thd->alloc((sizeof(Item*) +
-						 sizeof(List<Item>) +
-						 ref_pointer_array_size)
-						* send_group_parts)))
+  if (!(rollup.null_items= (Item_null_result**) thd->alloc((sizeof(Item*) +
+                                                sizeof(Item**) +
+                                                sizeof(List<Item>) +
+				                ref_pointer_array_size)
+				                * send_group_parts )))
     return 1;
+  
+  rollup.fields= (List<Item>*) (rollup.null_items + send_group_parts);
   rollup.ref_pointer_arrays= (Item***) (rollup.fields + send_group_parts);
   ref_array= (Item**) (rollup.ref_pointer_arrays+send_group_parts);
-  rollup.item_null= new (thd->mem_root) Item_null();
 
   /*
     Prepare space for field list for the different levels
@@ -12554,12 +12560,16 @@ bool JOIN::rollup_init()
   */
   for (i= 0 ; i < send_group_parts ; i++)
   {
+    rollup.null_items[i]= new (thd->mem_root) Item_null_result();
     List<Item> *rollup_fields= &rollup.fields[i];
     rollup_fields->empty();
     rollup.ref_pointer_arrays[i]= ref_array;
     ref_array+= all_fields.elements;
+  }
+  for (i= 0 ; i < send_group_parts; i++)
+  {
     for (j=0 ; j < fields_list.elements ; j++)
-      rollup_fields->push_back(rollup.item_null);
+      rollup.fields[i].push_back(rollup.null_items[i]);
   }
   return 0;
 }
@@ -12663,7 +12673,8 @@ bool JOIN::rollup_make_fields(List<Item> &fields_arg, List<Item> &sel_fields,
       {
 	/* Check if this is something that is part of this group by */
 	ORDER *group_tmp;
-	for (group_tmp= start_group ; group_tmp ; group_tmp= group_tmp->next)
+	for (group_tmp= start_group, i-- ;
+             group_tmp ; group_tmp= group_tmp->next, i++)
 	{
 	  if (*group_tmp->item == item)
 	  {
@@ -12672,7 +12683,9 @@ bool JOIN::rollup_make_fields(List<Item> &fields_arg, List<Item> &sel_fields,
 	      set to NULL in this level
 	    */
 	    item->maybe_null= 1;		// Value will be null sometimes
-	    item= rollup.item_null;
+            Item_null_result *null_item= rollup.null_items[i];
+            null_item->result_field= ((Item_field *) item)->result_field;
+            item= null_item;
 	    break;
 	  }
 	}
@@ -12732,6 +12745,58 @@ int JOIN::rollup_send_data(uint idx)
   return 0;
 }
 
+/*
+  Write all rollup levels higher than the current one to a temp table
+
+  SYNOPSIS:
+    rollup_write_data()
+    idx                 Level we are on:
+                        0 = Total sum level
+                        1 = First group changed  (a)
+                        2 = Second group changed (a,b)
+    table               reference to temp table
+
+  SAMPLE
+    SELECT a, b, SUM(c) FROM t1 GROUP BY a,b WITH ROLLUP
+
+  RETURN
+    0	ok
+    1   if write_data_failed()
+*/
+
+int JOIN::rollup_write_data(uint idx, TABLE *table)
+{
+  uint i;
+  for (i= send_group_parts ; i-- > idx ; )
+  {
+    /* Get reference pointers to sum functions in place */
+    memcpy((char*) ref_pointer_array,
+	   (char*) rollup.ref_pointer_arrays[i],
+	   ref_pointer_array_size);
+    if ((!having || having->val_int()))
+    {
+      int error;
+      Item *item;
+      List_iterator_fast<Item> it(rollup.fields[i]);
+      while ((item= it++))
+      {
+        if (item->type() == Item::NULL_ITEM && item->is_result_field())
+          item->save_in_result_field(1);
+      }
+      copy_sum_funcs(sum_funcs_end[i+1], sum_funcs_end[i]);
+      if ((error= table->file->write_row(table->record[0])))
+      {
+	if (create_myisam_from_heap(thd, table, &tmp_table_param,
+				      error, 0))
+	  return 1;		     
+      }
+    }
+  }
+  /* Restore ref_pointer_array */
+  set_items_ref_array(current_ref_pointer_array);
+  return 0;
+}
+
 /*
   clear results if there are not rows found for group
   (end_send_group/end_write_group)

sql/sql_select.h

@@ -135,7 +135,7 @@ typedef struct st_rollup
 {
   enum State { STATE_NONE, STATE_INITED, STATE_READY };
   State state;
-  Item *item_null;
+  Item_null_result **null_items;
   Item ***ref_pointer_arrays;
   List<Item> *fields;
 } ROLLUP;
@@ -323,6 +323,7 @@ class JOIN :public Sql_alloc
   bool rollup_make_fields(List<Item> &all_fields, List<Item> &fields,
 			  Item_sum ***func);
   int rollup_send_data(uint idx);
+  int rollup_write_data(uint idx, TABLE *table);
   bool test_in_subselect(Item **where);
   void join_free(bool full);
   void clear();

sql/sql_string.h

@@ -205,6 +205,10 @@ class String
       }
     }
   }
+  inline void shrink_to_length()
+  {
+    Alloced_length= str_length;
+  }
   bool is_alloced() { return alloced; }
   inline String& operator = (const String &s)
   {