Merge

BitKeeper/etc/logging_ok:
  auto-union
innobase/trx/trx0trx.c:
  Auto merged
mysql-test/r/ctype_collate.result:
  Auto merged
mysql-test/r/func_system.result:
  Auto merged
mysql-test/r/type_blob.result:
  Auto merged
sql/ha_innodb.cc:
  Auto merged
sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_create.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_strfunc.cc:
  Auto merged
sql/item_strfunc.h:
  Auto merged
sql/opt_sum.cc:
  Auto merged
innobase/ut/ut0mem.c:
  e
  merge from 4.1
mysql-test/r/func_group.result:
  merge from 4.1
mysql-test/r/func_str.result:
  merge from 4.1
mysql-test/t/func_group.test:
  merge from 4.1

18 files changed, 424 insertions, 37 deletions

diff --git a/BitKeeper/etc/logging_ok b/BitKeeper/etc/logging_ok
index 89e1ff4bd48..ec66e9ef2eb 100644
--- a/BitKeeper/etc/logging_ok
+++ b/BitKeeper/etc/logging_ok
@@ -71,6 +71,7 @@ hf@deer.(none)
 hf@deer.mysql.r18.ru
 hf@genie.(none)
 igor@hundin.mysql.fi
+igor@linux.local
 igor@rurik.mysql.com
 ingo@mysql.com
 jan@hundin.mysql.fi
diff --git a/innobase/trx/trx0trx.c b/innobase/trx/trx0trx.c
index 344fe280711..dd4da33abb5 100644
--- a/innobase/trx/trx0trx.c
+++ b/innobase/trx/trx0trx.c
@@ -262,6 +262,20 @@ trx_free(
 		putc('\n', stderr);
 	}
 
+	if (trx->n_mysql_tables_in_use != 0
+	    || trx->mysql_n_tables_locked != 0) {
+
+		ut_print_timestamp(stderr);
+		fprintf(stderr,
+"  InnoDB: Error: MySQL is freeing a thd\n"
+"InnoDB: though trx->n_mysql_tables_in_use is %lu\n"
+"InnoDB: and trx->mysql_n_tables_locked is %lu.\n",
+			(ulong)trx->n_mysql_tables_in_use,
+			(ulong)trx->mysql_n_tables_locked);
+
+		trx_print(stderr, trx);		
+	}
+
 	ut_a(trx->magic_n == TRX_MAGIC_N);
 
 	trx->magic_n = 11112222;
@@ -272,9 +286,6 @@ trx_free(
 
 	ut_a(trx->insert_undo == NULL); 
 	ut_a(trx->update_undo == NULL); 
-
-	ut_a(trx->n_mysql_tables_in_use == 0);
-	ut_a(trx->mysql_n_tables_locked == 0);
 	
 	if (trx->undo_no_arr) {
 		trx_undo_arr_free(trx->undo_no_arr);
diff --git a/innobase/ut/ut0mem.c b/innobase/ut/ut0mem.c
index 9e026ed0011..69d4f586ff7 100644
--- a/innobase/ut/ut0mem.c
+++ b/innobase/ut/ut0mem.c
@@ -14,6 +14,7 @@ Created 5/11/1994 Heikki Tuuri
 
 #include "mem0mem.h"
 #include "os0sync.h"
+#include "os0thread.h"
 
 /* This struct is placed first in every allocated memory block */
 typedef struct ut_mem_block_struct ut_mem_block_t;
@@ -66,6 +67,7 @@ ut_malloc_low(
 	ibool	assert_on_error) /* in: if TRUE, we crash mysqld if the memory
 				cannot be allocated */
 {
+	ulint	retry_count	= 0;
 	void*	ret;
 
 	ut_ad((sizeof(ut_mem_block_t) % 8) == 0); /* check alignment ok */
@@ -73,24 +75,26 @@ ut_malloc_low(
 	if (!ut_mem_block_list_inited) {
 	        ut_mem_block_list_init();
 	}
-
+retry:
 	os_fast_mutex_lock(&ut_list_mutex);
 
 	ret = malloc(n + sizeof(ut_mem_block_t));
 
-	if (ret == NULL) {
-		ut_print_timestamp(stderr);
-		fprintf(stderr,
-		"  InnoDB: Fatal error: cannot allocate %lu bytes of\n"
+	if (ret == NULL && retry_count < 60) {
+		if (retry_count == 0) {
+			ut_print_timestamp(stderr);
+
+			fprintf(stderr,
+		"  InnoDB: Error: cannot allocate %lu bytes of\n"
 		"InnoDB: memory with malloc! Total allocated memory\n"
 		"InnoDB: by InnoDB %lu bytes. Operating system errno: %lu\n"
-		"InnoDB: Cannot continue operation!\n"
 		"InnoDB: Check if you should increase the swap file or\n"
 		"InnoDB: ulimits of your operating system.\n"
 		"InnoDB: On FreeBSD check you have compiled the OS with\n"
 		"InnoDB: a big enough maximum process size.\n"
 		"InnoDB: Note that in most 32-bit computers the process\n"
 		"InnoDB: memory space is limited to 2 GB or 4 GB.\n",
+		"InnoDB: We keep retrying the allocation for 60 seconds...\n",
 		                  (ulong) n, (ulong) ut_total_allocated_memory,
 #ifdef __WIN__
 			(ulong) GetLastError()
@@ -98,7 +102,21 @@ ut_malloc_low(
 			(ulong) errno
 #endif
 			);
+		}
+
+		os_fast_mutex_unlock(&ut_list_mutex);
 
+		/* Sleep for a second and retry the allocation; maybe this is
+		just a temporary shortage of memory */
+
+		os_thread_sleep(1000000);
+		
+		retry_count++;
+
+		goto retry;
+	}
+
+	if (ret == NULL) {
 		/* Flush stderr to make more probable that the error
 		message gets in the error file before we generate a seg
 		fault */
@@ -113,8 +131,10 @@ ut_malloc_low(
 		by graceful exit handling in ut_a(). */
 #if (!defined __NETWARE__) 
 		if (assert_on_error) {
+			ut_print_timestamp(stderr);
+
 			fprintf(stderr,
-		"InnoDB: We now intentionally generate a seg fault so that\n"
+		"  InnoDB: We now intentionally generate a seg fault so that\n"
 		"InnoDB: on Linux we get a stack trace.\n");
 
 			if (*ut_mem_null_ptr) ut_mem_null_ptr = 0;
diff --git a/mysql-test/r/ctype_collate.result b/mysql-test/r/ctype_collate.result
index 201e1c6de08..e3130888a05 100644
--- a/mysql-test/r/ctype_collate.result
+++ b/mysql-test/r/ctype_collate.result
@@ -514,7 +514,7 @@ Variable_name	Value
 character_set_client	latin1
 SELECT charset('a'),collation('a'),coercibility('a'),'a'='A';
 charset('a')	collation('a')	coercibility('a')	'a'='A'
-latin1	latin1_swedish_ci	3	1
+latin1	latin1_swedish_ci	4	1
 explain extended SELECT charset('a'),collation('a'),coercibility('a'),'a'='A';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
@@ -525,7 +525,7 @@ SHOW VARIABLES LIKE 'collation_client';
 Variable_name	Value
 SELECT charset('a'),collation('a'),coercibility('a'),'a'='A';
 charset('a')	collation('a')	coercibility('a')	'a'='A'
-latin1	latin1_swedish_ci	3	1
+latin1	latin1_swedish_ci	4	1
 SET CHARACTER SET 'DEFAULT';
 ERROR 42000: Unknown character set: 'DEFAULT'
 DROP TABLE t1;
diff --git a/mysql-test/r/func_group.result b/mysql-test/r/func_group.result
index ea299455364..d3498340191 100644
--- a/mysql-test/r/func_group.result
+++ b/mysql-test/r/func_group.result
@@ -831,4 +831,29 @@ select id, stddev_pop(value1), var_pop(value1), stddev_samp(value1), var_samp(va
 id	stddev_pop(value1)	var_pop(value1)	stddev_samp(value1)	var_samp(value1)
 1	0.816497	0.666667	1.000000	1.000000
 2	1.118034	1.250000	1.290994	1.666667
+CREATE TABLE t1(
+id int PRIMARY KEY,
+a  int,
+b  int,
+INDEX i_b_id(a,b,id),
+INDEX i_id(a,id)
+);
+INSERT INTO t1 VALUES 
+(1,1,4), (2,2,1), (3,1,3), (4,2,1), (5,1,1);
+SELECT MAX(id) FROM t1 WHERE id < 3 AND a=2 AND b=6;
+MAX(id)
+NULL
+DROP TABLE t1;
+CREATE TABLE t1(
+id int PRIMARY KEY,
+a  int,
+b  int,
+INDEX i_id(a,id),
+INDEX i_b_id(a,b,id)
+);
+INSERT INTO t1 VALUES 
+(1,1,4), (2,2,1), (3,1,3), (4,2,1), (5,1,1);
+SELECT MAX(id) FROM t1 WHERE id < 3 AND a=2 AND b=6;
+MAX(id)
+NULL
 DROP TABLE t1;
diff --git a/mysql-test/r/func_str.result b/mysql-test/r/func_str.result
index 85a0c2c55f9..49f81deea89 100644
--- a/mysql-test/r/func_str.result
+++ b/mysql-test/r/func_str.result
@@ -693,6 +693,277 @@ 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
+ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT) and (latin1_bin,EXPLICIT) for operation 'substr_index'
+select _latin1'B' between _latin1'a' and _latin1'c';
+_latin1'B' between _latin1'a' and _latin1'c'
+1
+select _latin1'B' collate latin1_bin between _latin1'a' and _latin1'c';
+_latin1'B' collate latin1_bin between _latin1'a' and _latin1'c'
+0
+select _latin1'B' between _latin1'a' collate latin1_bin and _latin1'c';
+_latin1'B' between _latin1'a' collate latin1_bin and _latin1'c'
+0
+select _latin1'B' between _latin1'a' and _latin1'c' collate latin1_bin;
+_latin1'B' between _latin1'a' and _latin1'c' collate latin1_bin
+0
+select _latin2'B' between _latin1'a' and _latin1'b';
+ERROR HY000: Illegal mix of collations (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation 'between'
+select _latin1'B' between _latin2'a' and _latin1'b';
+ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation 'between'
+select _latin1'B' between _latin1'a' and _latin2'b';
+ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE) for operation 'between'
+select _latin1'B' collate latin1_general_ci between _latin1'a' collate latin1_bin and _latin1'b';
+ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_bin,EXPLICIT), (latin1_swedish_ci,COERCIBLE) for operation 'between'
+select _latin1'B' in (_latin1'a',_latin1'b');
+_latin1'B' in (_latin1'a',_latin1'b')
+1
+select _latin1'B' collate latin1_bin in (_latin1'a',_latin1'b');
+_latin1'B' collate latin1_bin in (_latin1'a',_latin1'b')
+0
+select _latin1'B' in (_latin1'a' collate latin1_bin,_latin1'b');
+_latin1'B' in (_latin1'a' collate latin1_bin,_latin1'b')
+0
+select _latin1'B' in (_latin1'a',_latin1'b' collate latin1_bin);
+_latin1'B' in (_latin1'a',_latin1'b' collate latin1_bin)
+0
+select _latin2'B' in (_latin1'a',_latin1'b');
+ERROR HY000: Illegal mix of collations (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation ' IN '
+select _latin1'B' in (_latin2'a',_latin1'b');
+ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation ' IN '
+select _latin1'B' in (_latin1'a',_latin2'b');
+ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE) for operation ' IN '
+select _latin1'B' COLLATE latin1_general_ci in (_latin1'a' COLLATE latin1_bin,_latin1'b');
+ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_bin,EXPLICIT), (latin1_swedish_ci,COERCIBLE) for operation ' IN '
+select _latin1'B' COLLATE latin1_general_ci in (_latin1'a',_latin1'b' COLLATE latin1_bin);
+ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_swedish_ci,COERCIBLE), (latin1_bin,EXPLICIT) for operation ' IN '
+select collation(bin(130)), coercibility(bin(130));
+collation(bin(130))	coercibility(bin(130))
+latin1_swedish_ci	4
+select collation(oct(130)), coercibility(oct(130));
+collation(oct(130))	coercibility(oct(130))
+latin1_swedish_ci	4
+select collation(conv(130,16,10)), coercibility(conv(130,16,10));
+collation(conv(130,16,10))	coercibility(conv(130,16,10))
+latin1_swedish_ci	4
+select collation(hex(130)), coercibility(hex(130));
+collation(hex(130))	coercibility(hex(130))
+latin1_swedish_ci	4
+select collation(char(130)), coercibility(hex(130));
+collation(char(130))	coercibility(hex(130))
+latin1_swedish_ci	4
+select collation(format(130,10)), coercibility(format(130,10));
+collation(format(130,10))	coercibility(format(130,10))
+latin1_swedish_ci	4
+select collation(lcase(_latin2'a')), coercibility(lcase(_latin2'a'));
+collation(lcase(_latin2'a'))	coercibility(lcase(_latin2'a'))
+latin2_general_ci	4
+select collation(ucase(_latin2'a')), coercibility(ucase(_latin2'a'));
+collation(ucase(_latin2'a'))	coercibility(ucase(_latin2'a'))
+latin2_general_ci	4
+select collation(left(_latin2'a',1)), coercibility(left(_latin2'a',1));
+collation(left(_latin2'a',1))	coercibility(left(_latin2'a',1))
+latin2_general_ci	4
+select collation(right(_latin2'a',1)), coercibility(right(_latin2'a',1));
+collation(right(_latin2'a',1))	coercibility(right(_latin2'a',1))
+latin2_general_ci	4
+select collation(substring(_latin2'a',1,1)), coercibility(substring(_latin2'a',1,1));
+collation(substring(_latin2'a',1,1))	coercibility(substring(_latin2'a',1,1))
+latin2_general_ci	4
+select collation(concat(_latin2'a',_latin2'b')), coercibility(concat(_latin2'a',_latin2'b'));
+collation(concat(_latin2'a',_latin2'b'))	coercibility(concat(_latin2'a',_latin2'b'))
+latin2_general_ci	4
+select collation(lpad(_latin2'a',4,_latin2'b')), coercibility(lpad(_latin2'a',4,_latin2'b'));
+collation(lpad(_latin2'a',4,_latin2'b'))	coercibility(lpad(_latin2'a',4,_latin2'b'))
+latin2_general_ci	4
+select collation(rpad(_latin2'a',4,_latin2'b')), coercibility(rpad(_latin2'a',4,_latin2'b'));
+collation(rpad(_latin2'a',4,_latin2'b'))	coercibility(rpad(_latin2'a',4,_latin2'b'))
+latin2_general_ci	4
+select collation(concat_ws(_latin2'a',_latin2'b')), coercibility(concat_ws(_latin2'a',_latin2'b'));
+collation(concat_ws(_latin2'a',_latin2'b'))	coercibility(concat_ws(_latin2'a',_latin2'b'))
+latin2_general_ci	4
+select collation(make_set(255,_latin2'a',_latin2'b',_latin2'c')), coercibility(make_set(255,_latin2'a',_latin2'b',_latin2'c'));
+collation(make_set(255,_latin2'a',_latin2'b',_latin2'c'))	coercibility(make_set(255,_latin2'a',_latin2'b',_latin2'c'))
+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
+select collation(trim(_latin2' a ')), coercibility(trim(_latin2' a '));
+collation(trim(_latin2' a '))	coercibility(trim(_latin2' a '))
+latin2_general_ci	4
+select collation(ltrim(_latin2' a ')), coercibility(ltrim(_latin2' a '));
+collation(ltrim(_latin2' a '))	coercibility(ltrim(_latin2' a '))
+latin2_general_ci	4
+select collation(rtrim(_latin2' a ')), coercibility(rtrim(_latin2' a '));
+collation(rtrim(_latin2' a '))	coercibility(rtrim(_latin2' a '))
+latin2_general_ci	4
+select collation(trim(LEADING _latin2' ' FROM _latin2'a')), coercibility(trim(LEADING _latin2'a' FROM _latin2'a'));
+collation(trim(LEADING _latin2' ' FROM _latin2'a'))	coercibility(trim(LEADING _latin2'a' FROM _latin2'a'))
+latin2_general_ci	4
+select collation(trim(TRAILING _latin2' ' FROM _latin2'a')), coercibility(trim(TRAILING _latin2'a' FROM _latin2'a'));
+collation(trim(TRAILING _latin2' ' FROM _latin2'a'))	coercibility(trim(TRAILING _latin2'a' FROM _latin2'a'))
+latin2_general_ci	4
+select collation(trim(BOTH _latin2' ' FROM _latin2'a')), coercibility(trim(BOTH _latin2'a' FROM _latin2'a'));
+collation(trim(BOTH _latin2' ' FROM _latin2'a'))	coercibility(trim(BOTH _latin2'a' FROM _latin2'a'))
+latin2_general_ci	4
+select collation(repeat(_latin2'a',10)), coercibility(repeat(_latin2'a',10));
+collation(repeat(_latin2'a',10))	coercibility(repeat(_latin2'a',10))
+latin2_general_ci	4
+select collation(reverse(_latin2'ab')), coercibility(reverse(_latin2'ab'));
+collation(reverse(_latin2'ab'))	coercibility(reverse(_latin2'ab'))
+latin2_general_ci	4
+select collation(quote(_latin2'ab')), coercibility(quote(_latin2'ab'));
+collation(quote(_latin2'ab'))	coercibility(quote(_latin2'ab'))
+latin2_general_ci	4
+select collation(soundex(_latin2'ab')), coercibility(soundex(_latin2'ab'));
+collation(soundex(_latin2'ab'))	coercibility(soundex(_latin2'ab'))
+latin2_general_ci	4
+select collation(substring(_latin2'ab',1)), coercibility(substring(_latin2'ab',1));
+collation(substring(_latin2'ab',1))	coercibility(substring(_latin2'ab',1))
+latin2_general_ci	4
+select collation(insert(_latin2'abcd',2,3,_latin2'ef')), coercibility(insert(_latin2'abcd',2,3,_latin2'ef'));
+collation(insert(_latin2'abcd',2,3,_latin2'ef'))	coercibility(insert(_latin2'abcd',2,3,_latin2'ef'))
+latin2_general_ci	4
+select collation(replace(_latin2'abcd',_latin2'b',_latin2'B')), coercibility(replace(_latin2'abcd',_latin2'b',_latin2'B'));
+collation(replace(_latin2'abcd',_latin2'b',_latin2'B'))	coercibility(replace(_latin2'abcd',_latin2'b',_latin2'B'))
+latin2_general_ci	4
+select collation(encode('abcd','ab')), coercibility(encode('abcd','ab'));
+collation(encode('abcd','ab'))	coercibility(encode('abcd','ab'))
+binary	4
+create table t1 
+select
+bin(130),
+oct(130),
+conv(130,16,10),
+hex(130),
+char(130),
+format(130,10),
+left(_latin2'a',1),
+right(_latin2'a',1), 
+lcase(_latin2'a'), 
+ucase(_latin2'a'),
+substring(_latin2'a',1,1),
+concat(_latin2'a',_latin2'b'),
+lpad(_latin2'a',4,_latin2'b'),
+rpad(_latin2'a',4,_latin2'b'),
+concat_ws(_latin2'a',_latin2'b'),
+make_set(255,_latin2'a',_latin2'b',_latin2'c'),
+export_set(255,_latin2'y',_latin2'n',_latin2' '),
+trim(_latin2' a '),
+ltrim(_latin2' a '),
+rtrim(_latin2' a '),
+trim(LEADING _latin2' ' FROM _latin2' a '),
+trim(TRAILING _latin2' ' FROM _latin2' a '),
+trim(BOTH _latin2' ' FROM _latin2' a '),
+repeat(_latin2'a',10),
+reverse(_latin2'ab'),
+quote(_latin2'ab'),
+soundex(_latin2'ab'),
+substring(_latin2'ab',1),
+insert(_latin2'abcd',2,3,_latin2'ef'),
+replace(_latin2'abcd',_latin2'b',_latin2'B'),
+encode('abcd','ab')
+;
+Warnings:
+Warning	1265	Data truncated for column 'format(130,10)' at row 1
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `bin(130)` char(64) NOT NULL default '',
+  `oct(130)` char(64) NOT NULL default '',
+  `conv(130,16,10)` char(64) NOT NULL default '',
+  `hex(130)` char(6) NOT NULL default '',
+  `char(130)` char(1) NOT NULL default '',
+  `format(130,10)` char(4) NOT NULL default '',
+  `left(_latin2'a',1)` char(1) character set latin2 NOT NULL default '',
+  `right(_latin2'a',1)` char(1) character set latin2 NOT NULL default '',
+  `lcase(_latin2'a')` char(1) character set latin2 NOT NULL default '',
+  `ucase(_latin2'a')` char(1) character set latin2 NOT NULL default '',
+  `substring(_latin2'a',1,1)` char(1) character set latin2 NOT NULL default '',
+  `concat(_latin2'a',_latin2'b')` char(2) character set latin2 NOT NULL default '',
+  `lpad(_latin2'a',4,_latin2'b')` char(4) character set latin2 NOT NULL default '',
+  `rpad(_latin2'a',4,_latin2'b')` char(4) character set latin2 NOT NULL default '',
+  `concat_ws(_latin2'a',_latin2'b')` char(1) character set latin2 NOT NULL default '',
+  `make_set(255,_latin2'a',_latin2'b',_latin2'c')` char(5) character set latin2 NOT NULL default '',
+  `export_set(255,_latin2'y',_latin2'n',_latin2' ')` char(127) character set latin2 NOT NULL default '',
+  `trim(_latin2' a ')` char(3) character set latin2 NOT NULL default '',
+  `ltrim(_latin2' a ')` char(3) character set latin2 NOT NULL default '',
+  `rtrim(_latin2' a ')` char(3) character set latin2 NOT NULL default '',
+  `trim(LEADING _latin2' ' FROM _latin2' a ')` char(3) character set latin2 NOT NULL default '',
+  `trim(TRAILING _latin2' ' FROM _latin2' a ')` char(3) character set latin2 NOT NULL default '',
+  `trim(BOTH _latin2' ' FROM _latin2' a ')` char(3) character set latin2 NOT NULL default '',
+  `repeat(_latin2'a',10)` char(10) character set latin2 NOT NULL default '',
+  `reverse(_latin2'ab')` char(2) character set latin2 NOT NULL default '',
+  `quote(_latin2'ab')` char(6) character set latin2 NOT NULL default '',
+  `soundex(_latin2'ab')` char(4) character set latin2 NOT NULL default '',
+  `substring(_latin2'ab',1)` char(2) character set latin2 NOT NULL default '',
+  `insert(_latin2'abcd',2,3,_latin2'ef')` char(6) character set latin2 NOT NULL default '',
+  `replace(_latin2'abcd',_latin2'b',_latin2'B')` char(4) character set latin2 NOT NULL default '',
+  `encode('abcd','ab')` binary(4) NOT NULL default ''
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+drop table t1;
+select SUBSTR('abcdefg',3,2);
+SUBSTR('abcdefg',3,2)
+cd
+select SUBSTRING('abcdefg',3,2);
+SUBSTRING('abcdefg',3,2)
+cd
+select SUBSTR('abcdefg',-3,2) FROM DUAL;
+SUBSTR('abcdefg',-3,2)
+ef
+select SUBSTR('abcdefg',-1,5) FROM DUAL;
+SUBSTR('abcdefg',-1,5)
+g
+select SUBSTR('abcdefg',0,0) FROM DUAL;
+SUBSTR('abcdefg',0,0)
+
+select SUBSTR('abcdefg',-1,-1) FROM DUAL;
+SUBSTR('abcdefg',-1,-1)
+
+select SUBSTR('abcdefg',1,-1) FROM DUAL;
+SUBSTR('abcdefg',1,-1)
+
+create table t7 (s1 char);
+select * from t7
+where concat(s1 collate latin1_general_ci,s1 collate latin1_swedish_ci) = 'AA';
+ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT) and (latin1_swedish_ci,EXPLICIT) for operation 'concat'
+drop table t7;
+select substring_index("1abcd;2abcd;3abcd;4abcd", ';', 2),substring_index("1abcd;2abcd;3abcd;4abcd", ';', -2);
+substring_index("1abcd;2abcd;3abcd;4abcd", ';', 2)	substring_index("1abcd;2abcd;3abcd;4abcd", ';', -2)
+1abcd;2abcd	3abcd;4abcd
+explain extended select md5('hello'), sha('abc'), sha1('abc'), soundex(''), 'mood' sounds like 'mud', aes_decrypt(aes_encrypt('abc','1'),'1'),concat('*',space(5),'*'), reverse('abc'), rpad('a',4,'1'), lpad('a',4,'1'),  concat_ws(',','',NULL,'a'),make_set(255,_latin2'a',_latin2'b',_latin2'c'),elt(2,1),locate("a","b",2),format(130,10),char(0),conv(130,16,10),hex(130),binary 'HE', export_set(255,_latin2'y',_latin2'n',_latin2' '),FIELD('b' COLLATE latin1_bin,'A','B'),FIND_IN_SET(_latin1'B',_latin1'a,b,c,d'),collation(conv(130,16,10)), coercibility(conv(130,16,10)),length('\n\t\r\b\0\_\%\\'),bit_length('\n\t\r\b\0\_\%\\'),bit_length('\n\t\r\b\0\_\%\\'),concat('monty',' was here ','again'),length('hello'),char(ascii('h')),ord('h'),quote(1/0),crc32("123"),replace('aaaa','a','b'),insert('txs',2,1,'hi'),left(_latin2'a',1),right(_latin2'a',1),lcase(_latin2'a'),ucase(_latin2'a'),SUBSTR('abcdefg',3,2),substring_index("1abcd;2abcd;3abcd;4abcd", ';', 2),trim(_latin2' a '),ltrim(_latin2' a '),rtrim(_latin2' a '), decode(encode(repeat("a",100000),"monty"),"monty");
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+Warnings:
+Note	1003	select md5(_latin1'hello') AS `md5('hello')`,sha(_latin1'abc') AS `sha('abc')`,sha(_latin1'abc') AS `sha1('abc')`,soundex(_latin1'') AS `soundex('')`,(soundex(_latin1'mood') = soundex(_latin1'mud')) AS `'mood' sounds like 'mud'`,aes_decrypt(aes_encrypt(_latin1'abc',_latin1'1'),_latin1'1') AS `aes_decrypt(aes_encrypt('abc','1'),'1')`,concat(_latin1'*',repeat(_latin1' ',5),_latin1'*') AS `concat('*',space(5),'*')`,reverse(_latin1'abc') AS `reverse('abc')`,rpad(_latin1'a',4,_latin1'1') AS `rpad('a',4,'1')`,lpad(_latin1'a',4,_latin1'1') AS `lpad('a',4,'1')`,concat_ws(_latin1',',_latin1'',NULL,_latin1'a') AS `concat_ws(',','',NULL,'a')`,make_set(255,_latin2'a',_latin2'b',_latin2'c') AS `make_set(255,_latin2'a',_latin2'b',_latin2'c')`,elt(2,1) AS `elt(2,1)`,locate(_latin1'a',_latin1'b',2) AS `locate("a","b",2)`,format(130,10) AS `format(130,10)`,char(0) AS `char(0)`,conv(130,16,10) AS `conv(130,16,10)`,hex(130) AS `hex(130)`,cast(_latin1'HE' as char charset binary) AS `binary 'HE'`,export_set(255,_latin2'y',_latin2'n',_latin2' ') AS `export_set(255,_latin2'y',_latin2'n',_latin2' ')`,field((_latin1'b' collate _latin1'latin1_bin'),_latin1'A',_latin1'B') AS `FIELD('b' COLLATE latin1_bin,'A','B')`,find_in_set(_latin1'B',_latin1'a,b,c,d') AS `FIND_IN_SET(_latin1'B',_latin1'a,b,c,d')`,collation(conv(130,16,10)) AS `collation(conv(130,16,10))`,coercibility(conv(130,16,10)) AS `coercibility(conv(130,16,10))`,length(_latin1'\n	\r\0\\_\\%\\') AS `length('\n\t\r\b\0\_\%\\')`,bit_length(_latin1'\n	\r\0\\_\\%\\') AS `bit_length('\n\t\r\b\0\_\%\\')`,bit_length(_latin1'\n	\r\0\\_\\%\\') AS `bit_length('\n\t\r\b\0\_\%\\')`,concat(_latin1'monty',_latin1' was here ',_latin1'again') AS `concat('monty',' was here ','again')`,length(_latin1'hello') AS `length('hello')`,char(ascii(_latin1'h')) AS `char(ascii('h'))`,ord(_latin1'h') AS `ord('h')`,quote((1 / 0)) AS `quote(1/0)`,crc32(_latin1'123') AS `crc32("123")`,replace(_latin1'aaaa',_latin1'a',_latin1'b') AS `replace('aaaa','a','b')`,insert(_latin1'txs',2,1,_latin1'hi') AS `insert('txs',2,1,'hi')`,left(_latin2'a',1) AS `left(_latin2'a',1)`,right(_latin2'a',1) AS `right(_latin2'a',1)`,lcase(_latin2'a') AS `lcase(_latin2'a')`,ucase(_latin2'a') AS `ucase(_latin2'a')`,substr(_latin1'abcdefg',3,2) AS `SUBSTR('abcdefg',3,2)`,substr_index(_latin1'1abcd;2abcd;3abcd;4abcd',_latin1';',2) AS `substring_index("1abcd;2abcd;3abcd;4abcd", ';', 2)`,trim(_latin2' a ') AS `trim(_latin2' a ')`,ltrim(_latin2' a ') AS `ltrim(_latin2' a ')`,rtrim(_latin2' a ') AS `rtrim(_latin2' a ')`,decode(encode(repeat(_latin1'a',100000))) AS `decode(encode(repeat("a",100000),"monty"),"monty")`
+SELECT lpad(12345, 5, "#");
+lpad(12345, 5, "#")
+12345
+SELECT conv(71, 10, 36), conv('1Z', 36, 10);
+conv(71, 10, 36)	conv('1Z', 36, 10)
+1Z	71
+create table t1 (id int(1), str varchar(10)) DEFAULT CHARSET=utf8;
+insert into t1 values (1,'aaaaaaaaaa'), (2,'bbbbbbbbbb');
+create table t2 (id int(1), str varchar(10)) DEFAULT CHARSET=utf8;
+insert into t2 values (1,'cccccccccc'), (2,'dddddddddd');
+select substring(concat(t1.str, t2.str), 1, 15) "name" from t1, t2 
+where t2.id=t1.id order by name;
+name
+aaaaaaaaaaccccc
+bbbbbbbbbbddddd
+drop table t1, t2;
+create table t1 (c1 INT, c2 INT UNSIGNED);
+insert into t1 values ('21474836461','21474836461');
+Warnings:
+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	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	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
diff --git a/mysql-test/r/func_system.result b/mysql-test/r/func_system.result
index 0f827913780..9aa936f1c78 100644
--- a/mysql-test/r/func_system.result
+++ b/mysql-test/r/func_system.result
@@ -68,3 +68,11 @@ drop table t1;
 select TRUE,FALSE,NULL;
 TRUE	FALSE	NULL
 1	0	NULL
+create table t1 (a char(10)) character set latin1;
+select * from t1 where a=version();
+a
+select * from t1 where a=database();
+a
+select * from t1 where a=user();
+a
+drop table t1;
diff --git a/mysql-test/r/type_blob.result b/mysql-test/r/type_blob.result
index 7b9a94ba998..a9b90617bcc 100644
--- a/mysql-test/r/type_blob.result
+++ b/mysql-test/r/type_blob.result
@@ -509,7 +509,7 @@ charset(load_file('../../std_data/words.dat')),
 collation(load_file('../../std_data/words.dat')),
 coercibility(load_file('../../std_data/words.dat'));
 charset(load_file('../../std_data/words.dat'))	collation(load_file('../../std_data/words.dat'))	coercibility(load_file('../../std_data/words.dat'))
-binary	binary	3
+binary	binary	4
 explain extended select 
 charset(load_file('../../std_data/words.dat')),
 collation(load_file('../../std_data/words.dat')),
diff --git a/mysql-test/t/func_group.test b/mysql-test/t/func_group.test
index 96fd297dc20..dce4d8c142e 100644
--- a/mysql-test/t/func_group.test
+++ b/mysql-test/t/func_group.test
@@ -536,4 +536,32 @@ drop table t1, t2, t3;
 CREATE TABLE t1 (id int(11),value1 float(10,2));
 INSERT INTO t1 VALUES (1,0.00),(1,1.00), (1,2.00), (2,10.00), (2,11.00), (2,12.00), (2,13.00);
 select id, stddev_pop(value1), var_pop(value1), stddev_samp(value1), var_samp(value1) from t1 group by id;
+#
+# Bug 8893: wrong result for min/max optimization with 2 indexes
+#
+
+CREATE TABLE t1(
+  id int PRIMARY KEY,
+  a  int,
+  b  int,
+  INDEX i_b_id(a,b,id),
+  INDEX i_id(a,id)
+);
+INSERT INTO t1 VALUES 
+  (1,1,4), (2,2,1), (3,1,3), (4,2,1), (5,1,1);
+SELECT MAX(id) FROM t1 WHERE id < 3 AND a=2 AND b=6;
+DROP TABLE t1;
+
+# change the order of the last two index definitions
+
+CREATE TABLE t1(
+  id int PRIMARY KEY,
+  a  int,
+  b  int,
+  INDEX i_id(a,id),
+  INDEX i_b_id(a,b,id)
+);
+INSERT INTO t1 VALUES 
+  (1,1,4), (2,2,1), (3,1,3), (4,2,1), (5,1,1);
+SELECT MAX(id) FROM t1 WHERE id < 3 AND a=2 AND b=6;
 DROP TABLE t1;
diff --git a/mysql-test/t/func_system.test b/mysql-test/t/func_system.test
index a05b80ca56b..7fff165e057 100644
--- a/mysql-test/t/func_system.test
+++ b/mysql-test/t/func_system.test
@@ -30,3 +30,12 @@ show create table t1;
 drop table t1;
 
 select TRUE,FALSE,NULL;
+
+#
+# Bug#8291 Illegal collation mix with USER() function
+#
+create table t1 (a char(10)) character set latin1;
+select * from t1 where a=version();
+select * from t1 where a=database();
+select * from t1 where a=user();
+drop table t1;
diff --git a/sql/ha_innodb.cc b/sql/ha_innodb.cc
index 93876a49a5c..4dee14c27b4 100644
--- a/sql/ha_innodb.cc
+++ b/sql/ha_innodb.cc
@@ -2632,6 +2632,7 @@ ha_innobase::write_row(
                 table->timestamp_field->set_time();
 
 	if ((user_thd->lex->sql_command == SQLCOM_ALTER_TABLE
+	    || user_thd->lex->sql_command == SQLCOM_OPTIMIZE
 	    || user_thd->lex->sql_command == SQLCOM_CREATE_INDEX
 	    || user_thd->lex->sql_command == SQLCOM_DROP_INDEX)
 	    && num_write_row >= 10000) {
diff --git a/sql/item.cc b/sql/item.cc
index 2e8b16a4f9d..ef3cc5105ef 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -724,7 +724,6 @@ void Item::split_sum_func2(THD *thd, Item **ref_pointer_array,
 */
 bool DTCollation::aggregate(DTCollation &dt, uint flags)
 {
-  nagg++;
   if (!my_charset_same(collation, dt.collation))
   {
     /* 
@@ -740,7 +739,6 @@ bool DTCollation::aggregate(DTCollation &dt, uint flags)
       else
       {
 	set(dt); 
-        strong= nagg;
       }
     }
     else if (dt.collation == &my_charset_bin)
@@ -748,7 +746,6 @@ bool DTCollation::aggregate(DTCollation &dt, uint flags)
       if (dt.derivation <= derivation)
       {
         set(dt);
-        strong= nagg;
       }
       else
        ; // Do nothing
@@ -764,20 +761,18 @@ bool DTCollation::aggregate(DTCollation &dt, uint flags)
              dt.collation->state & MY_CS_UNICODE)
     {
       set(dt);
-      strong= nagg;
     }
     else if ((flags & MY_COLL_ALLOW_COERCIBLE_CONV) &&
              derivation < dt.derivation &&
-             dt.derivation >= DERIVATION_COERCIBLE)
+             dt.derivation >= DERIVATION_SYSCONST)
     {
       // Do nothing;
     }
     else if ((flags & MY_COLL_ALLOW_COERCIBLE_CONV) &&
              dt.derivation < derivation &&
-             derivation >= DERIVATION_COERCIBLE)
+             derivation >= DERIVATION_SYSCONST)
     {
       set(dt);
-      strong= nagg;
     }
     else
     {
@@ -793,7 +788,6 @@ bool DTCollation::aggregate(DTCollation &dt, uint flags)
   else if (dt.derivation < derivation)
   {
     set(dt);
-    strong= nagg;
   }
   else
   { 
diff --git a/sql/item.h b/sql/item.h
index 157c48393ba..97913e40916 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -32,8 +32,9 @@ class Item_field;
 
 enum Derivation
 {
-  DERIVATION_IGNORABLE= 4,
-  DERIVATION_COERCIBLE= 3,
+  DERIVATION_IGNORABLE= 5,
+  DERIVATION_COERCIBLE= 4,
+  DERIVATION_SYSCONST= 3,
   DERIVATION_IMPLICIT= 2,
   DERIVATION_NONE= 1,
   DERIVATION_EXPLICIT= 0
@@ -62,22 +63,16 @@ class DTCollation {
 public:
   CHARSET_INFO     *collation;
   enum Derivation derivation;
-  uint nagg;    // Total number of aggregated collations.
-  uint strong;  // Number of the strongest collation.
   
   DTCollation()
   {
     collation= &my_charset_bin;
     derivation= DERIVATION_NONE;
-    nagg= 0;
-    strong= 0;
   }
   DTCollation(CHARSET_INFO *collation_arg, Derivation derivation_arg)
   {
     collation= collation_arg;
     derivation= derivation_arg;
-    nagg= 0;
-    strong= 0;
   }
   void set(DTCollation &dt)
   { 
@@ -103,6 +98,7 @@ public:
       case DERIVATION_IGNORABLE: return "IGNORABLE";
       case DERIVATION_COERCIBLE: return "COERCIBLE";
       case DERIVATION_IMPLICIT:  return "IMPLICIT";
+      case DERIVATION_SYSCONST:  return "SYSCONST";
       case DERIVATION_EXPLICIT:  return "EXPLICIT";
       case DERIVATION_NONE:      return "NONE";
       default: return "UNKNOWN";
diff --git a/sql/item_create.cc b/sql/item_create.cc
index 6bd5c0c9a52..35cc46989f7 100644
--- a/sql/item_create.cc
+++ b/sql/item_create.cc
@@ -434,7 +434,7 @@ Item *create_func_version(void)
 {
   return new Item_static_string_func("version()", server_version,
 			 (uint) strlen(server_version),
-			 system_charset_info, DERIVATION_IMPLICIT);
+			 system_charset_info, DERIVATION_SYSCONST);
 }
 
 Item *create_func_weekday(Item* a)
diff --git a/sql/item_func.cc b/sql/item_func.cc
index e5e9fcd5dbf..cc4d25bc5af 100644
--- a/sql/item_func.cc
+++ b/sql/item_func.cc
@@ -82,8 +82,6 @@ bool Item_func::agg_arg_collations(DTCollation &c, Item **av, uint count,
                                    uint flags)
 {
   uint i;
-  c.nagg= 0;
-  c.strong= 0;
   c.set(av[0]->collation);
   for (i= 1; i < count; i++)
   {
diff --git a/sql/item_strfunc.cc b/sql/item_strfunc.cc
index 536ee46f4db..03aa56128ca 100644
--- a/sql/item_strfunc.cc
+++ b/sql/item_strfunc.cc
@@ -1515,6 +1515,23 @@ String *Item_func_decode::val_str(String *str)
 }
 
 
+Item *Item_func_sysconst::safe_charset_converter(CHARSET_INFO *tocs)
+{
+  Item_string *conv;
+  uint conv_errors;
+  String tmp, cstr, *ostr= val_str(&tmp);
+  cstr.copy(ostr->ptr(), ostr->length(), ostr->charset(), tocs, &conv_errors);
+  if (conv_errors || !(conv= new Item_string(cstr.ptr(), cstr.length(),
+                                             cstr.charset(),
+                                             collation.derivation)))
+  {
+    return NULL;
+  }
+  conv->str_value.copy();
+  return conv;
+}
+
+
 String *Item_func_database::val_str(String *str)
 {
   DBUG_ASSERT(fixed == 1);
diff --git a/sql/item_strfunc.h b/sql/item_strfunc.h
index dc50c9a4ccd..ea8a78c528a 100644
--- a/sql/item_strfunc.h
+++ b/sql/item_strfunc.h
@@ -337,10 +337,18 @@ public:
 };
 
 
-class Item_func_database :public Item_str_func
+class Item_func_sysconst :public Item_str_func
 {
 public:
-  Item_func_database() { collation.set(system_charset_info,DERIVATION_IMPLICIT); }
+  Item_func_sysconst()
+  { collation.set(system_charset_info,DERIVATION_SYSCONST); }
+  Item *safe_charset_converter(CHARSET_INFO *tocs);
+};
+
+class Item_func_database :public Item_func_sysconst
+{
+public:
+  Item_func_database() :Item_func_sysconst() {}
   String *val_str(String *);
   void fix_length_and_dec()
   {
@@ -350,10 +358,10 @@ public:
   const char *func_name() const { return "database"; }
 };
 
-class Item_func_user :public Item_str_func
+class Item_func_user :public Item_func_sysconst
 {
 public:
-  Item_func_user() { collation.set(system_charset_info, DERIVATION_IMPLICIT); }
+  Item_func_user() :Item_func_sysconst() {}
   String *val_str(String *);
   void fix_length_and_dec() 
   { 
diff --git a/sql/opt_sum.cc b/sql/opt_sum.cc
index ef9babf7713..134d3564ef8 100644
--- a/sql/opt_sum.cc
+++ b/sql/opt_sum.cc
@@ -638,7 +638,6 @@ static bool find_key_for_maxmin(bool max_fl, TABLE_REF *ref,
 {
   if (!(field->flags & PART_KEY_FLAG))
     return 0;                                        // Not key field
-  *prefix_len= 0;
 
   TABLE *table= field->table;
   uint idx= 0;
@@ -651,6 +650,7 @@ static bool find_key_for_maxmin(bool max_fl, TABLE_REF *ref,
     KEY_PART_INFO *part,*part_end;
     key_part_map key_part_to_use= 0;
     uint jdx= 0;
+    *prefix_len= 0;
     for (part= keyinfo->key_part, part_end= part+keyinfo->key_parts ;
          part != part_end ;
          part++, jdx++, key_part_to_use= (key_part_to_use << 1) | 1)