Patch for WL#3736: Extended Table, Column and Index Comments.

The task is to 
  (a) add a comment on indexes and 
  (b) increase the maximum length of column, table and the new index comments.

The patch committed on behalf of Yoshinori Matsunobu (Yoshinori.Matsunobu@Sun.COM).

include/my_base.h

@@ -273,6 +273,7 @@ enum ha_base_keytype {
 #define HA_SPACE_PACK_USED	 4	/* Test for if SPACE_PACK used */
 #define HA_VAR_LENGTH_KEY	 8
 #define HA_NULL_PART_KEY	 64
+#define HA_USES_COMMENT          4096
 #define HA_USES_PARSER           16384  /* Fulltext index uses [pre]parser */
 #define HA_USES_BLOCK_SIZE	 ((uint) 32768)
 #define HA_SORT_ALLOWS_SAME      512    /* Intern bit when sorting records */

include/mysql_com.h

@@ -32,6 +32,14 @@
 #define SERVER_VERSION_LENGTH 60
 #define SQLSTATE_LENGTH 5
 
+/*
+  Maximum length of comments
+*/
+#define TABLE_COMMENT_INLINE_MAXLEN 180 /* pre 6.0: 60 characters */
+#define TABLE_COMMENT_MAXLEN 2048
+#define COLUMN_COMMENT_MAXLEN 1024
+#define INDEX_COMMENT_MAXLEN 1024
+
 /*
   USER_HOST_BUFF_SIZE -- length of string buffer, that is enough to contain
   username and hostname parts of the user identifier with trailing zero in

mysql-test/r/analyze.result

@@ -53,7 +53,7 @@ analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	5	NULL	NULL	YES	BTREE		
 drop table t1;
 End of 4.1 tests

mysql-test/r/compress.result

@@ -2090,7 +2090,7 @@ fld6	char(4)	latin1_swedish_ci	NO				#
 show full columns from t2 from test like 's%';
 Field	Type	Collation	Null	Key	Default	Extra	Privileges	Comment
 show keys from t2;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t2	0	PRIMARY	1	auto	A	1199	NULL	NULL		BTREE		
 t2	0	fld1	1	fld1	A	1199	NULL	NULL		BTREE		
 t2	1	fld3	1	fld3	A	NULL	NULL	NULL		BTREE		

mysql-test/r/create.result

@@ -1553,12 +1553,12 @@ CREATE TABLE t1(c1 VARCHAR(33), KEY (c1) USING BTREE);
 DROP TABLE t1;
 CREATE TABLE t1(c1 VARCHAR(33), KEY USING BTREE (c1) USING HASH) ENGINE=MEMORY;
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	c1	1	c1	NULL	0	NULL	NULL	YES	HASH		
 DROP TABLE t1;
 CREATE TABLE t1(c1 VARCHAR(33), KEY USING HASH (c1) USING BTREE) ENGINE=MEMORY;
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	c1	1	c1	A	NULL	NULL	NULL	YES	BTREE		
 DROP TABLE t1;
 create user mysqltest_1@'test@test';

mysql-test/r/ctype_mb.result

@@ -32,7 +32,7 @@ t1	CREATE TABLE `t1` (
   KEY `key_a` (`a`(3))
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 SHOW KEYS FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	key_a	1	a	A	NULL	3	NULL	YES	BTREE		
 ALTER TABLE t1 CHANGE a a CHAR(4);
 SHOW CREATE TABLE t1;
@@ -42,7 +42,7 @@ t1	CREATE TABLE `t1` (
   KEY `key_a` (`a`(3))
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 SHOW KEYS FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	key_a	1	a	A	NULL	3	NULL	YES	BTREE		
 ALTER TABLE t1 CHANGE a a CHAR(4) CHARACTER SET utf8;
 SHOW CREATE TABLE t1;
@@ -52,6 +52,6 @@ t1	CREATE TABLE `t1` (
   KEY `key_a` (`a`(3))
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 SHOW KEYS FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	key_a	1	a	A	NULL	3	NULL	YES	BTREE		
 DROP TABLE t1;

mysql-test/r/fulltext.result

@@ -6,7 +6,7 @@ INSERT INTO t1 VALUES('MySQL has now support', 'for full-text search'),
 ('Function MATCH ... AGAINST()','is used to do a search'),
 ('Full-text search in MySQL', 'implements vector space model');
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	NULL	NULL	NULL	NULL	YES	FULLTEXT		
 t1	1	a	2	b	NULL	NULL	NULL	NULL	YES	FULLTEXT		
 select * from t1 where MATCH(a,b) AGAINST ("collections");
@@ -242,7 +242,7 @@ match(ttxt.inhalt) against ('foobar');
 id
 3
 show keys from t2;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t2	1	tig	1	ticket	A	NULL	NULL	NULL	YES	BTREE		
 t2	1	tix	1	inhalt	NULL	NULL	NULL	NULL	YES	FULLTEXT		
 show create table t2;

mysql-test/r/grant4.result

@@ -87,14 +87,14 @@ use mysqltest_db1;
 ** Connect as restricted user mysqltest_u1.
 ** SELECT FROM INFORMATION_SCHEMA.STATISTICS will succeed because any privileges will do (authentication is enough).
 SELECT * FROM INFORMATION_SCHEMA.STATISTICS WHERE table_name='t5';
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 def	mysqltest_db1	t5	1	mysqltest_db1	i	1	s1	A	NULL	NULL	NULL	YES	BTREE		
 ** SHOW INDEX FROM t5 will fail because we don't have any privileges on any column combination.
 SHOW INDEX FROM t5;
 ERROR 42000: SELECT command denied to user 'mysqltest_u1'@'localhost' for table 't5'
 ** SHOW INDEX FROM t6 will succeed because there exist a privilege on a column combination on t6.
 SHOW INDEX FROM t6;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t6	1	i	1	s1	A	NULL	NULL	NULL	YES	BTREE		
 ** CHECK TABLE requires any privilege on any column combination and should succeed for t6:
 CHECK TABLE t6;

mysql-test/r/heap.result

@@ -3,7 +3,7 @@ create table t1 (a int not null,b int not null, primary key (a)) engine=heap com
 insert into t1 values(1,1),(2,2),(3,3),(4,4);
 delete from t1 where a=1 or a=0;
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	a	NULL	3	NULL	NULL		HASH		
 select * from t1;
 a	b

mysql-test/r/heap_btree.result

@@ -3,7 +3,7 @@ create table t1 (a int not null,b int not null, primary key using BTREE (a)) eng
 insert into t1 values(1,1),(2,2),(3,3),(4,4);
 delete from t1 where a=1 or a=0;
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	a	A	NULL	NULL	NULL		BTREE		
 select * from t1;
 a	b

mysql-test/r/heap_hash.result

@@ -3,7 +3,7 @@ create table t1 (a int not null,b int not null, primary key using HASH (a)) engi
 insert into t1 values(1,1),(2,2),(3,3),(4,4);
 delete from t1 where a=1 or a=0;
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	a	NULL	3	NULL	NULL		HASH		
 select * from t1;
 a	b
@@ -327,12 +327,12 @@ explain select * from t1 ignore index (btree_idx) where name='matt';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	heap_idx	heap_idx	22	const	7	Using where
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	id	NULL	91	NULL	NULL		HASH		
 t1	1	heap_idx	1	name	NULL	13	NULL	NULL		HASH		
 t1	1	btree_idx	1	name	A	NULL	NULL	NULL		BTREE		
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	id	NULL	91	NULL	NULL		HASH		
 t1	1	heap_idx	1	name	NULL	13	NULL	NULL		HASH		
 t1	1	btree_idx	1	name	A	NULL	NULL	NULL		BTREE		
@@ -344,11 +344,11 @@ key (a,b)
 ) engine=heap;
 insert into t3 select name, name from t1;
 show index from t3;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t3	1	a	1	a	NULL	NULL	NULL	NULL		HASH		
 t3	1	a	2	b	NULL	13	NULL	NULL		HASH		
 show index from t3;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t3	1	a	1	a	NULL	NULL	NULL	NULL		HASH		
 t3	1	a	2	b	NULL	13	NULL	NULL		HASH		
 explain select * from t1 ignore key(btree_idx), t3 where t1.name='matt' and t3.a = concat('',t1.name) and t3.b=t1.name;

mysql-test/r/information_schema.result

@@ -169,10 +169,10 @@ table_name
 t1
 t4
 select * from information_schema.STATISTICS where TABLE_SCHEMA = "mysqltest";
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 def	mysqltest	t1	1	mysqltest	string_data	1	b	A	NULL	NULL	NULL	YES	BTREE		
 show keys from t3 where Key_name = "a_data";
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t3	1	a_data	1	a	A	NULL	NULL	NULL	YES	BTREE		
 show tables like 't%';
 Tables_in_test (t%)
@@ -400,7 +400,7 @@ latin1_general_ci
 latin1_general_cs
 latin1_spanish_ci
 show keys from v4;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 select * from information_schema.views where TABLE_NAME like "v%";
 TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	VIEW_DEFINITION	CHECK_OPTION	IS_UPDATABLE	DEFINER	SECURITY_TYPE	CHARACTER_SET_CLIENT	COLLATION_CONNECTION
 def	test	v0	select `information_schema`.`schemata`.`SCHEMA_NAME` AS `c` from `information_schema`.`schemata`	NONE	NO	root@localhost	DEFINER	latin1	latin1_swedish_ci
@@ -620,7 +620,7 @@ user
 drop view v1;
 create view vo as select 'a' union select 'a';
 show index from vo;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 select * from information_schema.TABLE_CONSTRAINTS where
 TABLE_NAME= "vo";
 CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_SCHEMA	TABLE_NAME	CONSTRAINT_TYPE
@@ -1130,7 +1130,7 @@ describe t1;
 Field	Type	Null	Key	Default	Extra
 f1	int(11)	YES	MUL	NULL	
 show indexes from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	f1	1	f1	A	NULL	NULL	NULL	YES	BTREE		
 drop table t1;
 create table t1(f1 binary(32), f2 varbinary(64));
@@ -1533,9 +1533,9 @@ CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	UNIQUE_CONSTRAINT_CATALOG	U
 select * from information_schema.schemata where schema_name = NULL;
 CATALOG_NAME	SCHEMA_NAME	DEFAULT_CHARACTER_SET_NAME	DEFAULT_COLLATION_NAME	SQL_PATH
 select * from `information_schema`.`STATISTICS` where `TABLE_SCHEMA` = NULL;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 select * from `information_schema`.`STATISTICS` where `TABLE_NAME` = NULL;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 select * from information_schema.tables where table_schema = NULL;
 TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	TABLE_TYPE	ENGINE	VERSION	ROW_FORMAT	TABLE_ROWS	AVG_ROW_LENGTH	DATA_LENGTH	MAX_DATA_LENGTH	INDEX_LENGTH	DATA_FREE	AUTO_INCREMENT	CREATE_TIME	UPDATE_TIME	CHECK_TIME	TABLE_COLLATION	CHECKSUM	CREATE_OPTIONS	TABLE_COMMENT
 select * from information_schema.tables where table_catalog = NULL;

mysql-test/r/key.result

@@ -148,7 +148,7 @@ a	2
 drop table t1;
 create table t1 (a int not null unique, b int unique, c int, d int not null primary key, key(c), e int not null unique);
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	d	A	0	NULL	NULL		BTREE		
 t1	0	a	1	a	A	0	NULL	NULL		BTREE		
 t1	0	e	1	e	A	0	NULL	NULL		BTREE		

mysql-test/r/mdl_sync.result

@@ -2072,7 +2072,7 @@ Warning	1684	Table 'test'.'t2' was skipped since its definition is being modifie
 select table_name, table_type, auto_increment, table_comment
 from information_schema.tables where table_schema='test' and table_name='t2';
 table_name	table_type	auto_increment	table_comment
-t2	BASE TABLE	NULL	Table 'test'.'t2' was skipped since its definition is being modified by concurre
+t2	BASE TABLE	NULL	Table 'test'.'t2' was skipped since its definition is being modified by concurrent DDL statement
 # Switching to connection 'default'.
 unlock tables;
 # Switching to connection 'con46044'.

mysql-test/r/merge.result

@@ -753,7 +753,7 @@ a	b	c
 1	1	1
 1	1	0
 show index from t3;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t3	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE		
 t3	1	a	2	b	A	NULL	NULL	NULL	YES	BTREE		
 t3	1	a	3	c	A	NULL	NULL	NULL	YES	BTREE		
@@ -2044,7 +2044,7 @@ CREATE TABLE tm1 (c1 INT) ENGINE=MRG_MYISAM UNION=(t1) INSERT_METHOD=FIRST;
 SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE
 TABLE_SCHEMA = 'test' and TABLE_NAME='tm1';
 TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	TABLE_TYPE	ENGINE	VERSION	ROW_FORMAT	TABLE_ROWS	AVG_ROW_LENGTH	DATA_LENGTH	MAX_DATA_LENGTH	INDEX_LENGTH	DATA_FREE	AUTO_INCREMENT	CREATE_TIME	UPDATE_TIME	CHECK_TIME	TABLE_COLLATION	CHECKSUM	CREATE_OPTIONS	TABLE_COMMENT
-def	test	tm1	BASE TABLE	NULL	NULL	NULL	#	#	#	#	#	#	#	#	#	#	NULL	#	#	Unable to open underlying table which is differently defined or of non-MyISAM ty
+def	test	tm1	BASE TABLE	NULL	NULL	NULL	#	#	#	#	#	#	#	#	#	#	NULL	#	#	Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
 DROP TABLE tm1;
 CREATE TABLE t1(C1 INT, C2 INT, KEY C1(C1), KEY C2(C2)) ENGINE=MYISAM;
 CREATE TABLE t2(C1 INT, C2 INT, KEY C1(C1), KEY C2(C2)) ENGINE=MYISAM;

mysql-test/r/mix2_myisam.result

@@ -169,7 +169,7 @@ optimize table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	status	OK
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	id	A	#	NULL	NULL		BTREE		
 t1	1	parent_id	1	parent_id	A	#	NULL	NULL		BTREE		
 t1	1	level	1	level	A	#	NULL	NULL		BTREE		
@@ -212,7 +212,7 @@ analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	skr	1	a	A	#	NULL	NULL	YES	BTREE		
 drop table t1;
 create table t1 (a int,b varchar(20),key(a)) engine=MyISAM;
@@ -257,7 +257,7 @@ drop table t1;
 CREATE TABLE t1 (a int not null, b int not null,c int not null,
 key(a),primary key(a,b), unique(c),key(a),unique(b)) ENGINE = MyISAM;
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	a	A	#	NULL	NULL		BTREE		
 t1	0	PRIMARY	2	b	A	#	NULL	NULL		BTREE		
 t1	0	c	1	c	A	#	NULL	NULL		BTREE		
@@ -635,7 +635,7 @@ optimize table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	status	OK
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	a	A	#	NULL	NULL		BTREE		
 drop table t1;
 create table t1 (i int, j int ) ENGINE=MyISAM;

mysql-test/r/myisam.result

@@ -38,14 +38,14 @@ optimize table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	a	A	5	NULL	NULL		BTREE		
 t1	1	b	1	b	A	1	NULL	NULL		BTREE		
 optimize table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	status	Table is already up to date
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	a	A	5	NULL	NULL		BTREE		
 t1	1	b	1	b	A	1	NULL	NULL		BTREE		
 drop table t1;
@@ -336,7 +336,7 @@ optimize table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	b	1	b	A	5	NULL	NULL	YES	BTREE		
 t1	1	c	1	c	A	5	NULL	NULL	YES	BTREE		
 t1	1	a	1	a	A	1	NULL	NULL		BTREE		
@@ -575,28 +575,28 @@ Error	1146	Table 'test.t3' doesn't exist
 drop table t1,t2;
 create table t1 (a int, key (a));
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE		
 alter table t1 disable keys;
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE	disabled	
 create table t2 (a int);
 set @@rand_seed1=31415926,@@rand_seed2=2718281828;
 insert t1 select * from t2;
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE	disabled	
 alter table t1 enable keys;
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	1000	NULL	NULL	YES	BTREE		
 alter table t1 engine=heap;
 alter table t1 disable keys;
 Warnings:
 Note	1031	Table storage engine for 't1' doesn't have this option
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	NULL	500	NULL	NULL	YES	HASH		
 drop table t1,t2;
 create table t1 ( a tinytext, b char(1), index idx (a(1),b) );
@@ -640,7 +640,7 @@ analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	10	NULL	NULL	YES	BTREE		
 insert into t1 values (11);
 delete from t1 where a=11;
@@ -648,7 +648,7 @@ check table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	10	NULL	NULL	YES	BTREE		
 set myisam_stats_method=nulls_equal;
 show variables like 'myisam_stats_method';
@@ -660,7 +660,7 @@ analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	5	NULL	NULL	YES	BTREE		
 insert into t1 values (11);
 delete from t1 where a=11;
@@ -668,7 +668,7 @@ check table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	5	NULL	NULL	YES	BTREE		
 set myisam_stats_method=DEFAULT;
 show variables like 'myisam_stats_method';
@@ -680,7 +680,7 @@ analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	10	NULL	NULL	YES	BTREE		
 insert into t1 values (11);
 delete from t1 where a=11;
@@ -688,7 +688,7 @@ check table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	10	NULL	NULL	YES	BTREE		
 drop table t1;
 set myisam_stats_method=nulls_ignored;
@@ -707,7 +707,7 @@ analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	2	NULL	NULL	YES	BTREE		
 t1	1	a	2	b	A	4	NULL	NULL	YES	BTREE		
 t1	1	a	3	c	A	4	NULL	NULL	YES	BTREE		
@@ -717,7 +717,7 @@ analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	0	NULL	NULL	YES	BTREE		
 t1	1	a	2	b	A	0	NULL	NULL	YES	BTREE		
 t1	1	a	3	c	A	0	NULL	NULL	YES	BTREE		
@@ -1738,12 +1738,12 @@ analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	8	NULL	NULL	YES	BTREE		
 alter table t1 disable keys;
 alter table t1 enable keys;
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	8	NULL	NULL	YES	BTREE		
 drop table t1;
 create table t1 (c1 int) engine=myisam pack_keys=0;

mysql-test/r/mysqldump.result

@@ -15,7 +15,7 @@ INSERT INTO t1 VALUES (1), (2);
 <database name="test">
 	<table_structure name="t1">
 		<field Field="a" Type="int(11)" Null="YES" Key="MUL" Extra="" />
-		<key Table="t1" Non_unique="1" Key_name="a" Seq_in_index="1" Column_name="a" Collation="A" Null="YES" Index_type="BTREE" Comment="" />
+		<key Table="t1" Non_unique="1" Key_name="a" Seq_in_index="1" Column_name="a" Collation="A" Null="YES" Index_type="BTREE" Comment="" Index_comment="" />
 	</table_structure>
 	<table_data name="t1">
 	<row>
@@ -3631,7 +3631,7 @@ CREATE TEMPORARY TABLE `TABLES` (
   `TABLE_COLLATION` varchar(32) DEFAULT NULL,
   `CHECKSUM` bigint(21) unsigned DEFAULT NULL,
   `CREATE_OPTIONS` varchar(255) DEFAULT NULL,
-  `TABLE_COMMENT` varchar(80) NOT NULL DEFAULT ''
+  `TABLE_COMMENT` varchar(2048) NOT NULL DEFAULT ''
 ) ENGINE=MEMORY DEFAULT CHARSET=utf8;
 /*!40101 SET character_set_client = @saved_cs_client */;
 #

mysql-test/r/named_pipe.result

@@ -2084,7 +2084,7 @@ fld6	char(4)	latin1_swedish_ci	NO				#
 show full columns from t2 from test like 's%';
 Field	Type	Collation	Null	Key	Default	Extra	Privileges	Comment
 show keys from t2;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t2	0	PRIMARY	1	auto	A	1199	NULL	NULL		BTREE		
 t2	0	fld1	1	fld1	A	1199	NULL	NULL		BTREE		
 t2	1	fld3	1	fld3	A	NULL	NULL	NULL		BTREE		

mysql-test/r/partition.result

@@ -69,13 +69,13 @@ partition by list (a)
 partition p1 values in (2));
 insert into t1 values (1,1),(2,1),(2,2),(2,3);
 show indexes from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE		
 analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 show indexes from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	1	NULL	NULL	YES	BTREE		
 drop table t1;
 create table t1 (a int)

mysql-test/r/ps_1general.result

@@ -290,7 +290,7 @@ a	int(11)	NO	PRI	NULL
 create index t2_idx on t2(b);
 prepare stmt4 from ' show index from t2 from test ';
 execute stmt4;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t2	0	PRIMARY	1	a	A	0	NULL	NULL		BTREE		
 t2	1	t2_idx	1	b	A	NULL	NULL	NULL	YES	BTREE		
 prepare stmt4 from ' show table status from test like ''t2%'' ';

mysql-test/r/ps_ddl.result

@@ -2089,11 +2089,11 @@ drop table if exists t1;
 create table t1 (a int);
 prepare stmt from "show keys from t1 where (1) in (select * from t1)";
 execute stmt;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 drop table t1;
 create table t1 (x int);
 execute stmt;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 drop table t1;
 deallocate prepare stmt;
 #

mysql-test/r/repair.result

@@ -13,14 +13,14 @@ create table t1(id int PRIMARY KEY, st varchar(10), KEY st_key(st));
 insert into t1 values(1, "One");
 alter table t1 disable keys;
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	id	A	1	NULL	NULL		BTREE		
 t1	1	st_key	1	st	A	NULL	NULL	NULL	YES	BTREE	disabled	
 repair table t1 extended;
 Table	Op	Msg_type	Msg_text
 test.t1	repair	status	OK
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	id	A	1	NULL	NULL		BTREE		
 t1	1	st_key	1	st	A	NULL	NULL	NULL	YES	BTREE	disabled	
 drop table t1;
@@ -46,7 +46,7 @@ REPAIR TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	repair	status	OK
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	5	NULL	NULL	YES	BTREE		
 SET myisam_repair_threads=@@global.myisam_repair_threads;
 DROP TABLE t1;

mysql-test/r/select.result

@@ -2086,7 +2086,7 @@ fld6	char(4)	latin1_swedish_ci	NO				#
 show full columns from t2 from test like 's%';
 Field	Type	Collation	Null	Key	Default	Extra	Privileges	Comment
 show keys from t2;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t2	0	PRIMARY	1	auto	A	1199	NULL	NULL		BTREE		
 t2	0	fld1	1	fld1	A	1199	NULL	NULL		BTREE		
 t2	1	fld3	1	fld3	A	NULL	NULL	NULL		BTREE		

mysql-test/r/shm.result

@@ -2084,7 +2084,7 @@ fld6	char(4)	latin1_swedish_ci	NO				#
 show full columns from t2 from test like 's%';
 Field	Type	Collation	Null	Key	Default	Extra	Privileges	Comment
 show keys from t2;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t2	0	PRIMARY	1	auto	A	1199	NULL	NULL		BTREE		
 t2	0	fld1	1	fld1	A	1199	NULL	NULL		BTREE		
 t2	1	fld3	1	fld3	A	NULL	NULL	NULL		BTREE		

mysql-test/r/show_check.result

@@ -73,7 +73,8 @@ def	information_schema	STATISTICS	STATISTICS	PACKED	Packed	253	10	0	Y	0	0	8
 def	information_schema	STATISTICS	STATISTICS	NULLABLE	Null	253	3	0	N	1	0	8
 def	information_schema	STATISTICS	STATISTICS	INDEX_TYPE	Index_type	253	16	5	N	1	0	8
 def	information_schema	STATISTICS	STATISTICS	COMMENT	Comment	253	16	0	Y	0	0	8
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+def	information_schema	STATISTICS	STATISTICS	INDEX_COMMENT	Index_comment	253	1024	0	N	1	0	8
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	a	A	5	NULL	NULL		BTREE		
 t1	1	b	1	b	A	1	NULL	NULL		BTREE		
 t1	1	b	2	c	A	5	NULL	NULL		BTREE		
@@ -133,7 +134,7 @@ def	information_schema	TABLES	TABLES	CHECK_TIME	Check_time	12	19	0	Y	128	0	63
 def	information_schema	TABLES	TABLES	TABLE_COLLATION	Collation	253	32	0	Y	0	0	8
 def	information_schema	TABLES	TABLES	CHECKSUM	Checksum	8	21	0	Y	32800	0	63
 def	information_schema	TABLES	TABLES	CREATE_OPTIONS	Create_options	253	255	0	Y	0	0	8
-def	information_schema	TABLES	TABLES	TABLE_COMMENT	Comment	253	80	0	N	1	0	8
+def	information_schema	TABLES	TABLES	TABLE_COMMENT	Comment	253	2048	0	N	1	0	8
 Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
 show databases;
 Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
@@ -163,7 +164,7 @@ def					Msg_text	253	255	2	Y	0	31	8
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	f1	A	1	NULL	NULL		BTREE		
 t1	0	PRIMARY	2	f2	A	3	NULL	NULL		BTREE		
 t1	0	PRIMARY	3	f3	A	9	NULL	NULL		BTREE		
@@ -180,7 +181,7 @@ def					Msg_text	253	255	2	Y	0	31	8
 Table	Op	Msg_type	Msg_text
 test.t1	repair	status	OK
 show index from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	f1	A	1	NULL	NULL		BTREE		
 t1	0	PRIMARY	2	f2	A	3	NULL	NULL		BTREE		
 t1	0	PRIMARY	3	f3	A	9	NULL	NULL		BTREE		
@@ -639,7 +640,8 @@ def	information_schema	STATISTICS	STATISTICS	PACKED	Packed	253	10	0	Y	0	0	63
 def	information_schema	STATISTICS	STATISTICS	NULLABLE	Null	253	3	0	N	1	0	63
 def	information_schema	STATISTICS	STATISTICS	INDEX_TYPE	Index_type	253	16	5	N	1	0	63
 def	information_schema	STATISTICS	STATISTICS	COMMENT	Comment	253	16	0	Y	0	0	63
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+def	information_schema	STATISTICS	STATISTICS	INDEX_COMMENT	Index_comment	253	1024	0	N	1	0	63
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	field1	A	0	1000	NULL		BTREE		
 drop table t1;
 create table t1 (
@@ -904,7 +906,8 @@ def	information_schema	STATISTICS	STATISTICS	PACKED	Packed	253	30	0	Y	0	0	33
 def	information_schema	STATISTICS	STATISTICS	NULLABLE	Null	253	9	0	N	1	0	33
 def	information_schema	STATISTICS	STATISTICS	INDEX_TYPE	Index_type	253	48	5	N	1	0	33
 def	information_schema	STATISTICS	STATISTICS	COMMENT	Comment	253	48	0	Y	0	0	33
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+def	information_schema	STATISTICS	STATISTICS	INDEX_COMMENT	Index_comment	253	3072	0	N	1	0	33
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	c	A	0	NULL	NULL		BTREE		
 ----------------------------------------------------------------
 SELECT
@@ -928,7 +931,7 @@ def	information_schema	TABLES	TABLES	ENGINE	ENGINE	253	192	6	Y	0	0	33
 def	information_schema	TABLES	TABLES	ROW_FORMAT	ROW_FORMAT	253	30	5	Y	0	0	33
 def	information_schema	TABLES	TABLES	TABLE_COLLATION	TABLE_COLLATION	253	96	17	Y	0	0	33
 def	information_schema	TABLES	TABLES	CREATE_OPTIONS	CREATE_OPTIONS	253	765	0	Y	0	0	33
-def	information_schema	TABLES	TABLES	TABLE_COMMENT	TABLE_COMMENT	253	240	0	N	1	0	33
+def	information_schema	TABLES	TABLES	TABLE_COMMENT	TABLE_COMMENT	253	6144	0	N	1	0	33
 TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	TABLE_TYPE	ENGINE	ROW_FORMAT	TABLE_COLLATION	CREATE_OPTIONS	TABLE_COMMENT
 def	test	t1	BASE TABLE	MyISAM	Fixed	latin1_swedish_ci		
 ----------------------------------------------------------------
@@ -963,7 +966,7 @@ def	information_schema	COLUMNS	COLUMNS	COLUMN_TYPE	COLUMN_TYPE	252	589815	7	N	17
 def	information_schema	COLUMNS	COLUMNS	COLUMN_KEY	COLUMN_KEY	253	9	3	N	1	0	33
 def	information_schema	COLUMNS	COLUMNS	EXTRA	EXTRA	253	81	0	N	1	0	33
 def	information_schema	COLUMNS	COLUMNS	PRIVILEGES	PRIVILEGES	253	240	31	N	1	0	33
-def	information_schema	COLUMNS	COLUMNS	COLUMN_COMMENT	COLUMN_COMMENT	253	765	0	N	1	0	33
+def	information_schema	COLUMNS	COLUMNS	COLUMN_COMMENT	COLUMN_COMMENT	253	3072	0	N	1	0	33
 TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	COLUMN_DEFAULT	IS_NULLABLE	DATA_TYPE	CHARACTER_SET_NAME	COLLATION_NAME	COLUMN_TYPE	COLUMN_KEY	EXTRA	PRIVILEGES	COLUMN_COMMENT
 def	test	t1	c	NULL	NO	int	NULL	NULL	int(11)	PRI		select,insert,update,references	
 ----------------------------------------------------------------
@@ -1295,7 +1298,7 @@ show columns from `a\b` from `mysqlttest\1`;
 Field	Type	Null	Key	Default	Extra
 a	int(11)	YES		NULL	
 show keys from `mysqlttest\1`.`a\b`;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 drop table `mysqlttest\1`.`a\b`;
 drop database `mysqlttest\1`;
 show engine foobar status;

mysql-test/r/sp.result

@@ -2404,7 +2404,7 @@ Level	Code	Message
 Field	Type	Null	Key	Default	Extra
 id	char(16)	NO			
 data	int(11)	NO		NULL	
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 Database	Table	In_use	Name_locked
 Variable_name	Value
 Tables_in_test (foo)
@@ -2425,7 +2425,7 @@ Level	Code	Message
 Field	Type	Null	Key	Default	Extra
 id	char(16)	NO			
 data	int(11)	NO		NULL	
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 Database	Table	In_use	Name_locked
 Variable_name	Value
 Tables_in_test (foo)

mysql-test/r/ssl.result

@@ -2087,7 +2087,7 @@ fld6	char(4)	latin1_swedish_ci	NO				#
 show full columns from t2 from test like 's%';
 Field	Type	Collation	Null	Key	Default	Extra	Privileges	Comment
 show keys from t2;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t2	0	PRIMARY	1	auto	A	1199	NULL	NULL		BTREE		
 t2	0	fld1	1	fld1	A	1199	NULL	NULL		BTREE		
 t2	1	fld3	1	fld3	A	NULL	NULL	NULL		BTREE		

mysql-test/r/ssl_compress.result

@@ -2090,7 +2090,7 @@ fld6	char(4)	latin1_swedish_ci	NO				#
 show full columns from t2 from test like 's%';
 Field	Type	Collation	Null	Key	Default	Extra	Privileges	Comment
 show keys from t2;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t2	0	PRIMARY	1	auto	A	1199	NULL	NULL		BTREE		
 t2	0	fld1	1	fld1	A	1199	NULL	NULL		BTREE		
 t2	1	fld3	1	fld3	A	NULL	NULL	NULL		BTREE		

mysql-test/r/strict.result

@@ -1304,22 +1304,96 @@ set @@sql_mode= @org_mode;
 set @@sql_mode='traditional';
 create table t1 (i int)
 comment '123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
          123456789*123456789*123456789*123456789*123456789*';
-ERROR HY000: Comment for table 't1' is too long (max = 60)
+ERROR HY000: Comment for table 't1' is too long (max = 2048)
 create table t1 (
 i int comment
 '123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
  123456789*123456789*123456789*123456789*
  123456789*123456789*123456789*123456789*
  123456789*123456789*123456789*123456789*
  123456789*123456789*123456789*123456789*
  123456789*123456789*123456789*123456789*
  123456789*123456789*123456789*123456789*');
-ERROR HY000: Comment for field 'i' is too long (max = 255)
+ERROR HY000: Comment for field 'i' is too long (max = 1024)
 set @@sql_mode= @org_mode;
 create table t1
 (i int comment
 '123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
   123456789*123456789*123456789*123456789*
   123456789*123456789*123456789*123456789*
   123456789*123456789*123456789*123456789*
@@ -1327,7 +1401,7 @@ create table t1
   123456789*123456789*123456789*123456789*
   123456789*123456789*123456789*123456789*');
 Warnings:
-Warning	1629	Comment for field 'i' is too long (max = 255)
+Warning	1629	Comment for field 'i' is too long (max = 1024)
 select column_name, column_comment from information_schema.columns where
 table_schema = 'test' and table_name = 't1';
 column_name	column_comment
@@ -1337,6 +1411,24 @@ i	123456789*123456789*123456789*123456789*
   123456789*123456789*123456789*123456789*
   123456789*123456789*123456789*123456789*
   123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*12345
 drop table t1;
 set names utf8;
 create table t1 (i int)

mysql-test/r/type_ranges.result

@@ -68,7 +68,7 @@ longblob_col	longblob	NULL	NO		NULL		#
 options	enum('one','two','tree')	latin1_swedish_ci	NO	MUL	NULL		#	
 flags	set('one','two','tree')	latin1_swedish_ci	NO				#	
 show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	auto	A	0	NULL	NULL		BTREE		
 t1	1	utiny	1	utiny	A	NULL	NULL	NULL		BTREE		
 t1	1	tiny	1	tiny	A	NULL	NULL	NULL		BTREE		

mysql-test/r/view.result

@@ -839,7 +839,7 @@ ERROR HY000: View 'test.v1' references invalid table(s) or column(s) or function
 show table status;
 Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
 t1	MyISAM	10	Fixed	0	0	0	#	1024	0	NULL	#	#	NULL	latin1_swedish_ci	NULL		
-v1	NULL	NULL	NULL	NULL	NULL	NULL	#	NULL	NULL	NULL	#	#	NULL	NULL	NULL	NULL	View 'test.v1' references invalid table(s) or column(s) or function(s) or define
+v1	NULL	NULL	NULL	NULL	NULL	NULL	#	NULL	NULL	NULL	#	#	NULL	NULL	NULL	NULL	View 'test.v1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
 drop view v1;
 drop table t1;
 create view v1 as select 99999999999999999999999999999999999999999999999999999 as col1;
@@ -3685,7 +3685,7 @@ c1	c2
 2	2
 CREATE VIEW v1 AS SELECT c1, c2 FROM t1;
 SHOW INDEX FROM v1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 SELECT * FROM v1 USE INDEX (PRIMARY) WHERE c1=2;
 ERROR 42000: Key 'PRIMARY' doesn't exist in table 'v1'
 SELECT * FROM v1 FORCE INDEX (PRIMARY) WHERE c1=2;

mysql-test/suite/binlog/r/binlog_stm_blackhole.result

@@ -63,7 +63,7 @@ INSERT INTO t1 VALUES('MySQL has now support', 'for full-text search'),
 ('Function MATCH ... AGAINST()','is used to do a search'),
 ('Full-text search in MySQL', 'implements vector space model');
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	NULL	NULL	NULL	NULL	YES	FULLTEXT		
 t1	1	a	2	b	NULL	NULL	NULL	NULL	YES	FULLTEXT		
 select * from t1 where MATCH(a,b) AGAINST ("collections");

mysql-test/suite/funcs_1/r/is_columns.result

@@ -46,7 +46,7 @@ COLUMN_TYPE	longtext	NO		NULL
 COLUMN_KEY	varchar(3)	NO			
 EXTRA	varchar(27)	NO			
 PRIVILEGES	varchar(80)	NO			
-COLUMN_COMMENT	varchar(255)	NO			
+COLUMN_COMMENT	varchar(1024)	NO			
 SHOW CREATE TABLE information_schema.COLUMNS;
 Table	Create Table
 COLUMNS	CREATE TEMPORARY TABLE `COLUMNS` (
@@ -68,7 +68,7 @@ COLUMNS	CREATE TEMPORARY TABLE `COLUMNS` (
   `COLUMN_KEY` varchar(3) NOT NULL DEFAULT '',
   `EXTRA` varchar(27) NOT NULL DEFAULT '',
   `PRIVILEGES` varchar(80) NOT NULL DEFAULT '',
-  `COLUMN_COMMENT` varchar(255) NOT NULL DEFAULT ''
+  `COLUMN_COMMENT` varchar(1024) NOT NULL DEFAULT ''
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8
 SHOW COLUMNS FROM information_schema.COLUMNS;
 Field	Type	Null	Key	Default	Extra
@@ -90,7 +90,7 @@ COLUMN_TYPE	longtext	NO		NULL
 COLUMN_KEY	varchar(3)	NO			
 EXTRA	varchar(27)	NO			
 PRIVILEGES	varchar(80)	NO			
-COLUMN_COMMENT	varchar(255)	NO			
+COLUMN_COMMENT	varchar(1024)	NO			
 SELECT table_catalog, table_schema, table_name, column_name
 FROM information_schema.columns WHERE table_catalog IS NULL OR table_catalog <> 'def';
 table_catalog	table_schema	table_name	column_name

mysql-test/suite/funcs_1/r/is_columns_is.result

@@ -19,7 +19,7 @@ def	information_schema	COLUMNS	CHARACTER_MAXIMUM_LENGTH	9	NULL	YES	bigint	NULL	N
 def	information_schema	COLUMNS	CHARACTER_OCTET_LENGTH	10	NULL	YES	bigint	NULL	NULL	19	0	NULL	NULL	bigint(21) unsigned			select	
 def	information_schema	COLUMNS	CHARACTER_SET_NAME	13	NULL	YES	varchar	32	96	NULL	NULL	utf8	utf8_general_ci	varchar(32)			select	
 def	information_schema	COLUMNS	COLLATION_NAME	14	NULL	YES	varchar	32	96	NULL	NULL	utf8	utf8_general_ci	varchar(32)			select	
-def	information_schema	COLUMNS	COLUMN_COMMENT	19		NO	varchar	255	765	NULL	NULL	utf8	utf8_general_ci	varchar(255)			select	
+def	information_schema	COLUMNS	COLUMN_COMMENT	19		NO	varchar	1024	3072	NULL	NULL	utf8	utf8_general_ci	varchar(1024)			select	
 def	information_schema	COLUMNS	COLUMN_DEFAULT	6	NULL	YES	longtext	4294967295	4294967295	NULL	NULL	utf8	utf8_general_ci	longtext			select	
 def	information_schema	COLUMNS	COLUMN_KEY	16		NO	varchar	3	9	NULL	NULL	utf8	utf8_general_ci	varchar(3)			select	
 def	information_schema	COLUMNS	COLUMN_NAME	4		NO	varchar	64	192	NULL	NULL	utf8	utf8_general_ci	varchar(64)			select	
@@ -242,6 +242,7 @@ def	information_schema	STATISTICS	CARDINALITY	10	NULL	YES	bigint	NULL	NULL	19	0
 def	information_schema	STATISTICS	COLLATION	9	NULL	YES	varchar	1	3	NULL	NULL	utf8	utf8_general_ci	varchar(1)			select	
 def	information_schema	STATISTICS	COLUMN_NAME	8		NO	varchar	64	192	NULL	NULL	utf8	utf8_general_ci	varchar(64)			select	
 def	information_schema	STATISTICS	COMMENT	15	NULL	YES	varchar	16	48	NULL	NULL	utf8	utf8_general_ci	varchar(16)			select	
+def	information_schema	STATISTICS	INDEX_COMMENT	16		NO	varchar	1024	3072	NULL	NULL	utf8	utf8_general_ci	varchar(1024)			select	
 def	information_schema	STATISTICS	INDEX_NAME	6		NO	varchar	64	192	NULL	NULL	utf8	utf8_general_ci	varchar(64)			select	
 def	information_schema	STATISTICS	INDEX_SCHEMA	5		NO	varchar	64	192	NULL	NULL	utf8	utf8_general_ci	varchar(64)			select	
 def	information_schema	STATISTICS	INDEX_TYPE	14		NO	varchar	16	48	NULL	NULL	utf8	utf8_general_ci	varchar(16)			select	
@@ -267,7 +268,7 @@ def	information_schema	TABLES	MAX_DATA_LENGTH	11	NULL	YES	bigint	NULL	NULL	19	0
 def	information_schema	TABLES	ROW_FORMAT	7	NULL	YES	varchar	10	30	NULL	NULL	utf8	utf8_general_ci	varchar(10)			select	
 def	information_schema	TABLES	TABLE_CATALOG	1		NO	varchar	512	1536	NULL	NULL	utf8	utf8_general_ci	varchar(512)			select	
 def	information_schema	TABLES	TABLE_COLLATION	18	NULL	YES	varchar	32	96	NULL	NULL	utf8	utf8_general_ci	varchar(32)			select	
-def	information_schema	TABLES	TABLE_COMMENT	21		NO	varchar	80	240	NULL	NULL	utf8	utf8_general_ci	varchar(80)			select	
+def	information_schema	TABLES	TABLE_COMMENT	21		NO	varchar	2048	6144	NULL	NULL	utf8	utf8_general_ci	varchar(2048)			select	
 def	information_schema	TABLES	TABLE_NAME	3		NO	varchar	64	192	NULL	NULL	utf8	utf8_general_ci	varchar(64)			select	
 def	information_schema	TABLES	TABLE_ROWS	8	NULL	YES	bigint	NULL	NULL	19	0	NULL	NULL	bigint(21) unsigned			select	
 def	information_schema	TABLES	TABLE_SCHEMA	2		NO	varchar	64	192	NULL	NULL	utf8	utf8_general_ci	varchar(64)			select	
@@ -419,7 +420,7 @@ NULL	information_schema	COLUMNS	NUMERIC_SCALE	bigint	NULL	NULL	NULL	NULL	bigint(
 3.0000	information_schema	COLUMNS	COLUMN_KEY	varchar	3	9	utf8	utf8_general_ci	varchar(3)
 3.0000	information_schema	COLUMNS	EXTRA	varchar	27	81	utf8	utf8_general_ci	varchar(27)
 3.0000	information_schema	COLUMNS	PRIVILEGES	varchar	80	240	utf8	utf8_general_ci	varchar(80)
-3.0000	information_schema	COLUMNS	COLUMN_COMMENT	varchar	255	765	utf8	utf8_general_ci	varchar(255)
+3.0000	information_schema	COLUMNS	COLUMN_COMMENT	varchar	1024	3072	utf8	utf8_general_ci	varchar(1024)
 3.0000	information_schema	COLUMN_PRIVILEGES	GRANTEE	varchar	81	243	utf8	utf8_general_ci	varchar(81)
 3.0000	information_schema	COLUMN_PRIVILEGES	TABLE_CATALOG	varchar	512	1536	utf8	utf8_general_ci	varchar(512)
 3.0000	information_schema	COLUMN_PRIVILEGES	TABLE_SCHEMA	varchar	64	192	utf8	utf8_general_ci	varchar(64)
@@ -639,6 +640,7 @@ NULL	information_schema	STATISTICS	SUB_PART	bigint	NULL	NULL	NULL	NULL	bigint(3)
 3.0000	information_schema	STATISTICS	NULLABLE	varchar	3	9	utf8	utf8_general_ci	varchar(3)
 3.0000	information_schema	STATISTICS	INDEX_TYPE	varchar	16	48	utf8	utf8_general_ci	varchar(16)
 3.0000	information_schema	STATISTICS	COMMENT	varchar	16	48	utf8	utf8_general_ci	varchar(16)
+3.0000	information_schema	STATISTICS	INDEX_COMMENT	varchar	1024	3072	utf8	utf8_general_ci	varchar(1024)
 3.0000	information_schema	TABLES	TABLE_CATALOG	varchar	512	1536	utf8	utf8_general_ci	varchar(512)
 3.0000	information_schema	TABLES	TABLE_SCHEMA	varchar	64	192	utf8	utf8_general_ci	varchar(64)
 3.0000	information_schema	TABLES	TABLE_NAME	varchar	64	192	utf8	utf8_general_ci	varchar(64)
@@ -659,7 +661,7 @@ NULL	information_schema	TABLES	CHECK_TIME	datetime	NULL	NULL	NULL	NULL	datetime
 3.0000	information_schema	TABLES	TABLE_COLLATION	varchar	32	96	utf8	utf8_general_ci	varchar(32)
 NULL	information_schema	TABLES	CHECKSUM	bigint	NULL	NULL	NULL	NULL	bigint(21) unsigned
 3.0000	information_schema	TABLES	CREATE_OPTIONS	varchar	255	765	utf8	utf8_general_ci	varchar(255)
-3.0000	information_schema	TABLES	TABLE_COMMENT	varchar	80	240	utf8	utf8_general_ci	varchar(80)
+3.0000	information_schema	TABLES	TABLE_COMMENT	varchar	2048	6144	utf8	utf8_general_ci	varchar(2048)
 3.0000	information_schema	TABLESPACES	TABLESPACE_NAME	varchar	64	192	utf8	utf8_general_ci	varchar(64)
 3.0000	information_schema	TABLESPACES	ENGINE	varchar	64	192	utf8	utf8_general_ci	varchar(64)
 3.0000	information_schema	TABLESPACES	TABLESPACE_TYPE	varchar	64	192	utf8	utf8_general_ci	varchar(64)

mysql-test/suite/funcs_1/r/is_statistics.result

@@ -43,6 +43,7 @@ PACKED	varchar(10)	YES		NULL
 NULLABLE	varchar(3)	NO			
 INDEX_TYPE	varchar(16)	NO			
 COMMENT	varchar(16)	YES		NULL	
+INDEX_COMMENT	varchar(1024)	NO			
 SHOW CREATE TABLE information_schema.STATISTICS;
 Table	Create Table
 STATISTICS	CREATE TEMPORARY TABLE `STATISTICS` (
@@ -60,7 +61,8 @@ STATISTICS	CREATE TEMPORARY TABLE `STATISTICS` (
   `PACKED` varchar(10) DEFAULT NULL,
   `NULLABLE` varchar(3) NOT NULL DEFAULT '',
   `INDEX_TYPE` varchar(16) NOT NULL DEFAULT '',
-  `COMMENT` varchar(16) DEFAULT NULL
+  `COMMENT` varchar(16) DEFAULT NULL,
+  `INDEX_COMMENT` varchar(1024) NOT NULL DEFAULT ''
 ) ENGINE=MEMORY DEFAULT CHARSET=utf8
 SHOW COLUMNS FROM information_schema.STATISTICS;
 Field	Type	Null	Key	Default	Extra
@@ -79,6 +81,7 @@ PACKED	varchar(10)	YES		NULL
 NULLABLE	varchar(3)	NO			
 INDEX_TYPE	varchar(16)	NO			
 COMMENT	varchar(16)	YES		NULL	
+INDEX_COMMENT	varchar(1024)	NO			
 SELECT table_catalog, table_schema, table_name, index_schema, index_name
 FROM information_schema.statistics WHERE table_catalog IS NOT NULL;
 table_catalog	table_schema	table_name	index_schema	index_name
@@ -157,7 +160,7 @@ ENGINE = MEMORY;
 SELECT * FROM information_schema.statistics
 WHERE table_schema LIKE 'db_datadict%'
 ORDER BY table_schema,table_name,index_name,seq_in_index,column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 def	db_datadict	t1	1	db_datadict	f2_ind	1	f2	NULL	0	NULL	NULL	YES	HASH		
 def	db_datadict	t1	0	db_datadict	PRIMARY	1	f1	NULL	0	NULL	NULL		HASH		
 def	db_datadict	t2	1	db_datadict	f2_ind	1	f2	NULL	0	NULL	NULL	YES	HASH		
@@ -178,7 +181,7 @@ GRANT USAGE ON *.* TO 'testuser2'@'localhost'
 SELECT * FROM information_schema.statistics
 WHERE table_schema LIKE 'db_datadict%'
 ORDER BY table_schema,table_name,index_name,seq_in_index,column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 SHOW GRANTS FOR 'testuser1'@'localhost';
 Grants for testuser1@localhost
 GRANT USAGE ON *.* TO 'testuser1'@'localhost'
@@ -188,7 +191,7 @@ ERROR 42000: Access denied for user 'testuser1'@'localhost' to database 'mysql'
 SELECT * FROM information_schema.statistics
 WHERE table_schema LIKE 'db_datadict%'
 ORDER BY table_schema,table_name,index_name,seq_in_index,column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 SHOW GRANTS FOR 'testuser1'@'localhost';
 ERROR 42000: Access denied for user 'testuser2'@'localhost' to database 'mysql'
 SHOW GRANTS FOR 'testuser2'@'localhost';
@@ -200,7 +203,7 @@ GRANT SELECT(f1,f5) ON db_datadict_2.t3 TO 'testuser1'@'localhost';
 SELECT * FROM information_schema.statistics
 WHERE table_schema LIKE 'db_datadict%'
 ORDER BY table_schema,table_name,index_name,seq_in_index,column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 def	db_datadict	t1	1	db_datadict	f2_ind	1	f2	NULL	0	NULL	NULL	YES	HASH		
 def	db_datadict	t1	0	db_datadict	PRIMARY	1	f1	NULL	0	NULL	NULL		HASH		
 def	db_datadict	t2	1	db_datadict	f2_ind	1	f2	NULL	0	NULL	NULL	YES	HASH		
@@ -223,7 +226,7 @@ GRANT USAGE ON *.* TO 'testuser2'@'localhost'
 SELECT * FROM information_schema.statistics
 WHERE table_schema LIKE 'db_datadict%'
 ORDER BY table_schema,table_name,index_name,seq_in_index,column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 def	db_datadict	t1	1	db_datadict	f2_ind	1	f2	NULL	0	NULL	NULL	YES	HASH		
 def	db_datadict	t1	0	db_datadict	PRIMARY	1	f1	NULL	0	NULL	NULL		HASH		
 def	db_datadict_2	t3	1	db_datadict_2	f2f1_ind	1	f2	NULL	NULL	NULL	NULL	YES	HASH		
@@ -241,7 +244,7 @@ ERROR 42000: Access denied for user 'testuser1'@'localhost' to database 'mysql'
 SELECT * FROM information_schema.statistics
 WHERE table_schema LIKE 'db_datadict%'
 ORDER BY table_schema,table_name,index_name,seq_in_index,column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 SHOW GRANTS FOR 'testuser1'@'localhost';
 ERROR 42000: Access denied for user 'testuser2'@'localhost' to database 'mysql'
 SHOW GRANTS FOR 'testuser2'@'localhost';
@@ -257,7 +260,7 @@ GRANT SELECT (f5, f1) ON `db_datadict_2`.`t3` TO 'testuser1'@'localhost'
 SELECT * FROM information_schema.statistics
 WHERE table_schema LIKE 'db_datadict%'
 ORDER BY table_schema,table_name,index_name,seq_in_index,column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 def	db_datadict_2	t3	1	db_datadict_2	f2f1_ind	1	f2	NULL	NULL	NULL	NULL	YES	HASH		
 def	db_datadict_2	t3	1	db_datadict_2	f2f1_ind	2	f1	NULL	0	NULL	NULL		HASH		
 def	db_datadict_2	t3	0	db_datadict_2	f5	1	f5	NULL	0	NULL	NULL	YES	HASH		
@@ -291,7 +294,7 @@ ALTER TABLE test.t1_1 ADD PRIMARY KEY (f1,f3);
 SELECT * FROM information_schema.statistics
 WHERE table_name LIKE 't1_%'
 ORDER BY table_schema,table_name,index_name,seq_in_index,column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 def	test	t1_1	0	test	PRIMARY	1	f1	A	NULL	NULL	NULL		BTREE		
 def	test	t1_1	0	test	PRIMARY	2	f3	A	0	NULL	NULL		BTREE		
 ALTER TABLE test.t1_1 DROP PRIMARY KEY;
@@ -301,20 +304,20 @@ table_name
 ALTER TABLE test.t1_1 ADD PRIMARY KEY (f1);
 SELECT * FROM information_schema.statistics
 WHERE table_name LIKE 't1_%';
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 def	test	t1_1	0	test	PRIMARY	1	f1	A	0	NULL	NULL		BTREE		
 ALTER TABLE test.t1_1 ADD INDEX (f4);
 CREATE        INDEX f3_f1     ON test.t1_1 (f3,f1);
 CREATE UNIQUE INDEX f4x_uni   ON test.t1_1 (f4x);
 CREATE        INDEX f2_hash USING HASH ON test.t1_2 (f2);
 CREATE        INDEX f1_idx    ON test.t1_2 (f1) COMMENT = 'COMMENT';
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'COMMENT = 'COMMENT'' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '= 'COMMENT'' at line 1
 CREATE        INDEX not_null  ON test.t1_1 (f3x);
 CREATE        INDEX f2_prefix ON test.t1_1 (f2(20));
 SELECT * FROM information_schema.statistics
 WHERE table_name LIKE 't1_%' AND index_name <> 'PRIMARY'
 ORDER BY table_schema,table_name,index_name,seq_in_index,column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 def	test	t1_1	1	test	f2_prefix	1	f2	A	NULL	20	NULL	YES	BTREE		
 def	test	t1_1	1	test	f3_f1	1	f3	A	NULL	NULL	NULL		BTREE		
 def	test	t1_1	1	test	f3_f1	2	f1	A	NULL	NULL	NULL		BTREE		

mysql-test/suite/funcs_1/r/is_statistics_is.result

@@ -6,12 +6,12 @@ GRANT SELECT ON db_datadict.* TO testuser1@localhost;
 SELECT * FROM information_schema.statistics
 WHERE table_schema = 'information_schema'
 ORDER BY table_schema, table_name, index_name, seq_in_index, column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 # Establish connection testuser1 (user=testuser1)
 SELECT * FROM information_schema.statistics
 WHERE table_schema = 'information_schema'
 ORDER BY table_schema, table_name, index_name, seq_in_index, column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 # Switch to connection default and close connection testuser1
 DROP USER testuser1@localhost;
 DROP DATABASE db_datadict;

mysql-test/suite/funcs_1/r/is_statistics_mysql.result

@@ -6,7 +6,7 @@ GRANT SELECT ON db_datadict.* TO testuser1@localhost;
 SELECT * FROM information_schema.statistics
 WHERE table_schema = 'mysql'
 ORDER BY table_schema, table_name, index_name, seq_in_index, column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 def	mysql	columns_priv	0	mysql	PRIMARY	1	Host	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	columns_priv	0	mysql	PRIMARY	2	Db	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	columns_priv	0	mysql	PRIMARY	3	User	A	#CARD#	NULL	NULL		BTREE		
@@ -59,7 +59,7 @@ def	mysql	user	0	mysql	PRIMARY	2	User	A	#CARD#	NULL	NULL		BTREE
 SELECT * FROM information_schema.statistics
 WHERE table_schema = 'mysql'
 ORDER BY table_schema, table_name, index_name, seq_in_index, column_name;
-TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT
+TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT
 # Switch to connection default and close connection testuser1
 DROP USER testuser1@localhost;
 DROP DATABASE db_datadict;

mysql-test/suite/funcs_1/r/is_table_constraints.result

@@ -110,14 +110,14 @@ def	db_datadict	my_idx2	db_datadict	t1	UNIQUE
 def	db_datadict	PRIMARY	db_datadict	t1	PRIMARY KEY
 def	db_datadict	PRIMARY	db_datadict	t2	PRIMARY KEY
 SHOW INDEXES FROM db_datadict.t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	f1	###	###	###	###	###	###	###	
 t1	0	PRIMARY	2	f2	###	###	###	###	###	###	###	
 t1	0	my_idx1	1	f6	###	###	###	###	###	###	###	
 t1	0	my_idx1	2	f1	###	###	###	###	###	###	###	
 t1	0	my_idx2	1	f3	###	###	###	###	###	###	###	
 SHOW INDEXES FROM db_datadict.t2;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t2	0	PRIMARY	1	f1	###	###	###	###	###	###	###	
 t2	0	PRIMARY	2	f2	###	###	###	###	###	###	###	
 # Establish connection testuser1 (user=testuser1)
@@ -133,7 +133,7 @@ def	db_datadict	my_idx1	db_datadict	t1	UNIQUE
 def	db_datadict	my_idx2	db_datadict	t1	UNIQUE
 def	db_datadict	PRIMARY	db_datadict	t1	PRIMARY KEY
 SHOW INDEXES FROM db_datadict.t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	f1	###	###	###	###	###	###	###	
 t1	0	PRIMARY	2	f2	###	###	###	###	###	###	###	
 t1	0	my_idx1	1	f6	###	###	###	###	###	###	###	

mysql-test/suite/funcs_1/r/is_tables.result

@@ -48,7 +48,7 @@ CHECK_TIME	datetime	YES		NULL
 TABLE_COLLATION	varchar(32)	YES		NULL	
 CHECKSUM	bigint(21) unsigned	YES		NULL	
 CREATE_OPTIONS	varchar(255)	YES		NULL	
-TABLE_COMMENT	varchar(80)	NO			
+TABLE_COMMENT	varchar(2048)	NO			
 SHOW CREATE TABLE information_schema.TABLES;
 Table	Create Table
 TABLES	CREATE TEMPORARY TABLE `TABLES` (
@@ -72,7 +72,7 @@ TABLES	CREATE TEMPORARY TABLE `TABLES` (
   `TABLE_COLLATION` varchar(32) DEFAULT NULL,
   `CHECKSUM` bigint(21) unsigned DEFAULT NULL,
   `CREATE_OPTIONS` varchar(255) DEFAULT NULL,
-  `TABLE_COMMENT` varchar(80) NOT NULL DEFAULT ''
+  `TABLE_COMMENT` varchar(2048) NOT NULL DEFAULT ''
 ) ENGINE=MEMORY DEFAULT CHARSET=utf8
 SHOW COLUMNS FROM information_schema.TABLES;
 Field	Type	Null	Key	Default	Extra
@@ -96,7 +96,7 @@ CHECK_TIME	datetime	YES		NULL
 TABLE_COLLATION	varchar(32)	YES		NULL	
 CHECKSUM	bigint(21) unsigned	YES		NULL	
 CREATE_OPTIONS	varchar(255)	YES		NULL	
-TABLE_COMMENT	varchar(80)	NO			
+TABLE_COMMENT	varchar(2048)	NO			
 SELECT table_catalog, table_schema, table_name
 FROM information_schema.tables WHERE table_catalog IS NULL OR table_catalog <> 'def';
 table_catalog	table_schema	table_name

mysql-test/suite/ndb/r/ndb_alter_table3.result

@@ -4,7 +4,7 @@ engine=ndb;
 insert into t1 values (1,'one','one'), (2,'two','two'), (3,'three','three');
 create index c on t1(c);
 show indexes from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	a	A	3	NULL	NULL		BTREE		
 t1	1	b	1	b	A	3	NULL	NULL	YES	BTREE		
 t1	1	c	1	c	A	3	NULL	NULL	YES	BTREE		
@@ -13,7 +13,7 @@ a	b	c
 2	two	two
 alter table t1 drop index c;
 show indexes from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	a	A	3	NULL	NULL		BTREE		
 t1	1	b	1	b	A	3	NULL	NULL	YES	BTREE		
 select * from t1 where c = 'two';

mysql-test/suite/ndb/r/ndb_basic.result

@@ -39,11 +39,11 @@ attr2 INT,
 attr3 VARCHAR(10)
 ) ENGINE=ndbcluster;
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	pk1	A	0	NULL	NULL		BTREE		
 INSERT INTO t1 VALUES (9410,9412, NULL, '9412'), (9411,9413, 17, '9413');
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	0	PRIMARY	1	pk1	A	2	NULL	NULL		BTREE		
 SELECT pk1 FROM t1 ORDER BY pk1;
 pk1

mysql-test/suite/rpl_ndb/r/rpl_ndb_ddl.result

@@ -878,11 +878,11 @@ TEST-INFO: SLAVE:  The INSERT is committed (Succeeded)
 
 -------- switch to master -------
 SHOW INDEX FROM mysqltest1.t6;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 
 -------- switch to slave --------
 SHOW INDEX FROM mysqltest1.t6;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 
 -------- switch to master -------
 
@@ -927,12 +927,12 @@ TEST-INFO: SLAVE:  The INSERT is committed (Succeeded)
 
 -------- switch to master -------
 SHOW INDEX FROM mysqltest1.t5;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t5	1	my_idx5	1	f1	A	0	NULL	NULL	YES	BTREE		
 
 -------- switch to slave --------
 SHOW INDEX FROM mysqltest1.t5;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t5	1	my_idx5	1	f1	A	0	NULL	NULL	YES	BTREE		
 
 -------- switch to master -------

mysql-test/suite/sys_vars/r/myisam_stats_method_func.result

@@ -21,7 +21,7 @@ ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	10	NULL	NULL	YES	BTREE		
 INSERT INTO t1 VALUES (11);
 DELETE FROM t1 WHERE a = 11;
@@ -29,7 +29,7 @@ CHECK TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	10	NULL	NULL	YES	BTREE		
 'Set nulls to be equal'
 SET myisam_stats_method = nulls_equal;
@@ -39,7 +39,7 @@ ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	5	NULL	NULL	YES	BTREE		
 INSERT INTO t1 VALUES (11);
 DELETE FROM t1 WHERE a = 11;
@@ -47,7 +47,7 @@ CHECK TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	5	NULL	NULL	YES	BTREE		
 'Set nulls to be ignored'
 SET myisam_stats_method = nulls_ignored;
@@ -67,7 +67,7 @@ ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	2	NULL	NULL	YES	BTREE		
 t1	1	a	2	b	A	4	NULL	NULL	YES	BTREE		
 t1	1	a	3	c	A	4	NULL	NULL	YES	BTREE		
@@ -77,7 +77,7 @@ ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 SHOW INDEX FROM t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
 t1	1	a	1	a	A	0	NULL	NULL	YES	BTREE		
 t1	1	a	2	b	A	0	NULL	NULL	YES	BTREE		
 t1	1	a	3	c	A	0	NULL	NULL	YES	BTREE		

mysql-test/t/strict.test

@@ -1166,11 +1166,65 @@ set @@sql_mode='traditional';
 --error ER_TOO_LONG_TABLE_COMMENT
 create table t1 (i int)
 comment '123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
+         123456789*123456789*123456789*123456789*123456789*
          123456789*123456789*123456789*123456789*123456789*';
 --error ER_TOO_LONG_FIELD_COMMENT
 create table t1 (
 i int comment
 '123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
+ 123456789*123456789*123456789*123456789*
  123456789*123456789*123456789*123456789*
  123456789*123456789*123456789*123456789*
  123456789*123456789*123456789*123456789*
@@ -1181,6 +1235,26 @@ set @@sql_mode= @org_mode;
 create table t1
 (i int comment
  '123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
+  123456789*123456789*123456789*123456789*
   123456789*123456789*123456789*123456789*
   123456789*123456789*123456789*123456789*
   123456789*123456789*123456789*123456789*

sql/handler.h

@@ -1011,6 +1011,7 @@ typedef struct st_key_create_information
   enum ha_key_alg algorithm;
   ulong block_size;
   LEX_STRING parser_name;
+  LEX_STRING comment;
 } KEY_CREATE_INFO;
 
 

sql/mysql_priv.h

@@ -2317,7 +2317,7 @@ ulong next_io_size(ulong pos);
 void append_unescaped(String *res, const char *pos, uint length);
 int create_frm(THD *thd, const char *name, const char *db, const char *table,
                uint reclength, uchar *fileinfo,
-	       HA_CREATE_INFO *create_info, uint keys);
+	       HA_CREATE_INFO *create_info, uint keys, KEY *key_info);
 void update_create_info_from_table(HA_CREATE_INFO *info, TABLE *form);
 int rename_file_ext(const char * from,const char * to,const char * ext);
 bool check_db_name(LEX_STRING *db);
@@ -2327,6 +2327,7 @@ char *get_field(MEM_ROOT *mem, Field *field);
 bool get_field(MEM_ROOT *mem, Field *field, class String *res);
 int wild_case_compare(CHARSET_INFO *cs, const char *str,const char *wildstr);
 char *fn_rext(char *name);
+bool check_duplicate_warning(THD *thd, char *msg, ulong length);
 
 /* Conversion functions */
 #endif /* MYSQL_SERVER */

sql/share/errmsg-utf8.txt

@@ -6321,3 +6321,5 @@ ER_STORED_FUNCTION_PREVENTS_SWITCH_BINLOG_DIRECT
 ER_SPATIAL_MUST_HAVE_GEOM_COL 42000
   eng "A SPATIAL index may only contain a geometrical type column"
 
+ER_TOO_LONG_INDEX_COMMENT
+  eng "Comment for index '%-.64s' is too long (max = %lu)"

sql/sql_show.cc

@@ -1376,7 +1376,6 @@ int store_create_info(THD *thd, TABLE_LIST *table_list, String *packet,
       packet->append(buff, (uint) (end - buff));
     }
     
-    
     if (share->table_charset &&
 	!(thd->variables.sql_mode & MODE_MYSQL323) &&
 	!(thd->variables.sql_mode & MODE_MYSQL40))
@@ -1520,6 +1519,14 @@ static void store_key_options(THD *thd, String *packet, TABLE *table,
       end= longlong10_to_str(key_info->block_size, buff, 10);
       packet->append(buff, (uint) (end - buff));
     }
+    DBUG_ASSERT(test(key_info->flags & HA_USES_COMMENT) == 
+               (key_info->comment.length > 0));
+    if (key_info->flags & HA_USES_COMMENT)
+    {
+      packet->append(STRING_WITH_LEN(" COMMENT "));
+      append_unescaped(packet, key_info->comment.str, 
+                       key_info->comment.length);
+    }
   }
 }
 
@@ -4767,6 +4774,11 @@ static int get_schema_stat_record(THD *thd, TABLE_LIST *tables,
         else
           table->field[14]->store("", 0, cs);
         table->field[14]->set_notnull();
+        DBUG_ASSERT(test(key_info->flags & HA_USES_COMMENT) == 
+                   (key_info->comment.length > 0));
+        if (key_info->flags & HA_USES_COMMENT)
+          table->field[15]->store(key_info->comment.str, 
+                                  key_info->comment.length, cs);
         if (schema_table_store_record(thd, table))
           DBUG_RETURN(1);
       }
@@ -6725,7 +6737,8 @@ ST_FIELD_INFO tables_fields_info[]=
    (MY_I_S_MAYBE_NULL | MY_I_S_UNSIGNED), "Checksum", OPEN_FULL_TABLE},
   {"CREATE_OPTIONS", 255, MYSQL_TYPE_STRING, 0, 1, "Create_options",
    OPEN_FRM_ONLY},
-  {"TABLE_COMMENT", 80, MYSQL_TYPE_STRING, 0, 0, "Comment", OPEN_FRM_ONLY},
+  {"TABLE_COMMENT", TABLE_COMMENT_MAXLEN, MYSQL_TYPE_STRING, 0, 0, 
+   "Comment", OPEN_FRM_ONLY},
   {0, 0, MYSQL_TYPE_STRING, 0, 0, 0, SKIP_OPEN_TABLE}
 };
 
@@ -6759,7 +6772,8 @@ ST_FIELD_INFO columns_fields_info[]=
   {"COLUMN_KEY", 3, MYSQL_TYPE_STRING, 0, 0, "Key", OPEN_FRM_ONLY},
   {"EXTRA", 27, MYSQL_TYPE_STRING, 0, 0, "Extra", OPEN_FRM_ONLY},
   {"PRIVILEGES", 80, MYSQL_TYPE_STRING, 0, 0, "Privileges", OPEN_FRM_ONLY},
-  {"COLUMN_COMMENT", 255, MYSQL_TYPE_STRING, 0, 0, "Comment", OPEN_FRM_ONLY},
+  {"COLUMN_COMMENT", COLUMN_COMMENT_MAXLEN, MYSQL_TYPE_STRING, 0, 0, 
+   "Comment", OPEN_FRM_ONLY},
   {0, 0, MYSQL_TYPE_STRING, 0, 0, 0, SKIP_OPEN_TABLE}
 };
 
@@ -6917,6 +6931,8 @@ ST_FIELD_INFO stat_fields_info[]=
   {"NULLABLE", 3, MYSQL_TYPE_STRING, 0, 0, "Null", OPEN_FRM_ONLY},
   {"INDEX_TYPE", 16, MYSQL_TYPE_STRING, 0, 0, "Index_type", OPEN_FULL_TABLE},
   {"COMMENT", 16, MYSQL_TYPE_STRING, 0, 1, "Comment", OPEN_FRM_ONLY},
+  {"INDEX_COMMENT", INDEX_COMMENT_MAXLEN, MYSQL_TYPE_STRING, 0, 0, 
+   "Index_comment", OPEN_FRM_ONLY},
   {0, 0, MYSQL_TYPE_STRING, 0, 0, 0, SKIP_OPEN_TABLE}
 };
 

sql/sql_table.cc

@@ -2646,6 +2646,21 @@ CHARSET_INFO* get_sql_field_charset(Create_field *sql_field,
 }
 
 
+bool check_duplicate_warning(THD *thd, char *msg, ulong length)
+{
+  List_iterator_fast<MYSQL_ERROR> it(thd->warning_info->warn_list());
+  MYSQL_ERROR *err;
+  while ((err= it++))
+  {
+    if (strncmp(msg, err->get_message_text(), length) == 0)
+    {
+      return true;
+    }
+  }
+  return false;
+}
+
+
 /*
   Preparation for table creation
 
@@ -3486,6 +3501,40 @@ mysql_prepare_create_table(THD *thd, HA_CREATE_INFO *create_info,
       my_error(ER_TOO_LONG_KEY,MYF(0),max_key_length);
       DBUG_RETURN(TRUE);
     }
+
+    uint tmp_len= system_charset_info->cset->charpos(system_charset_info,
+                                           key->key_create_info.comment.str,
+                                           key->key_create_info.comment.str +
+                                           key->key_create_info.comment.length,
+                                           INDEX_COMMENT_MAXLEN);
+
+    if (tmp_len < key->key_create_info.comment.length)
+    {
+      if ((thd->variables.sql_mode &
+           (MODE_STRICT_TRANS_TABLES | MODE_STRICT_ALL_TABLES)))
+      {
+        my_error(ER_TOO_LONG_INDEX_COMMENT, MYF(0),
+                 key_info->name, (uint) INDEX_COMMENT_MAXLEN);
+        DBUG_RETURN(-1);
+      }
+      char warn_buff[MYSQL_ERRMSG_SIZE];
+      my_snprintf(warn_buff, sizeof(warn_buff), ER(ER_TOO_LONG_INDEX_COMMENT),
+                  key_info->name, (uint) INDEX_COMMENT_MAXLEN);
+      /* do not push duplicate warnings */
+      if (!check_duplicate_warning(thd, warn_buff, strlen(warn_buff)))
+        push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
+                     ER_TOO_LONG_INDEX_COMMENT, warn_buff);
+
+      key->key_create_info.comment.length= tmp_len;
+    }
+
+    key_info->comment.length= key->key_create_info.comment.length;
+    if (key_info->comment.length > 0)
+    {
+      key_info->flags|= HA_USES_COMMENT;
+      key_info->comment.str= key->key_create_info.comment.str;
+    }
+
     key_info++;
   }
   if (!unique_key && !primary_key &&
@@ -6196,6 +6245,8 @@ mysql_prepare_alter_table(THD *thd, TABLE *table,
         key_create_info.block_size= key_info->block_size;
       if (key_info->flags & HA_USES_PARSER)
         key_create_info.parser_name= *plugin_name(key_info->parser);
+      if (key_info->flags & HA_USES_COMMENT)
+        key_create_info.comment= key_info->comment;
 
       if (key_info->flags & HA_SPATIAL)
         key_type= Key::SPATIAL;

sql/sql_yacc.yy

@@ -6063,6 +6063,7 @@ key_using_alg:
 all_key_opt:
           KEY_BLOCK_SIZE opt_equal ulong_num
           { Lex->key_create_info.block_size= $3; }
+	| COMMENT_SYM TEXT_STRING_sys { Lex->key_create_info.comment= $2; }
         ;
 
 normal_key_opt:

sql/structs.h

@@ -102,6 +102,7 @@ typedef struct st_key {
     int  bdb_return_if_eq;
   } handler;
   TABLE *table;
+  LEX_STRING comment;
 } KEY;
 
 

sql/table.cc

@@ -517,7 +517,7 @@ int open_table_def(THD *thd, TABLE_SHARE *share, uint db_flags)
   int error, table_type;
   bool error_given;
   File file;
-  uchar head[288], *disk_buff;
+  uchar head[64], *disk_buff;
   char	path[FN_REFLEN];
   MEM_ROOT **root_ptr, *old_root;
   DBUG_ENTER("open_table_def");
@@ -660,6 +660,7 @@ static int open_binary_frm(THD *thd, TABLE_SHARE *share, uchar *head,
   uint i,j;
   bool use_hash;
   char *keynames, *names, *comment_pos;
+  uchar forminfo[288];
   uchar *record;
   uchar *disk_buff, *strpos, *null_flags, *null_pos;
   ulong pos, record_offset, *rec_per_key, rec_buff_length;
@@ -682,6 +683,9 @@ static int open_binary_frm(THD *thd, TABLE_SHARE *share, uchar *head,
   if (!(pos=get_form_pos(file,head,(TYPELIB*) 0)))
     goto err;                                   /* purecov: inspected */
 
+  mysql_file_seek(file,pos,MY_SEEK_SET,MYF(0));
+  if (mysql_file_read(file, forminfo,288,MYF(MY_NABP)))
+    goto err;
   share->frm_version= head[2];
   /*
     Check if .frm file created by MySQL 5.0. In this case we want to
@@ -827,6 +831,20 @@ static int open_binary_frm(THD *thd, TABLE_SHARE *share, uchar *head,
   keynames=(char*) key_part;
   strpos+= (strmov(keynames, (char *) strpos) - keynames)+1;
 
+  //reading index comments
+  for (keyinfo= share->key_info, i=0; i < keys; i++, keyinfo++)
+  {
+    if (keyinfo->flags & HA_USES_COMMENT)
+    {
+      keyinfo->comment.length= uint2korr(strpos);
+      keyinfo->comment.str= strmake_root(&share->mem_root, (char*) strpos+2,
+                                         keyinfo->comment.length);
+      strpos+= 2 + keyinfo->comment.length;
+    } 
+    DBUG_ASSERT(test(keyinfo->flags & HA_USES_COMMENT) == 
+               (keyinfo->comment.length > 0));
+  }
+
   share->reclength = uint2korr((head+16));
   if (*(head+26) == 1)
     share->system= 1;				/* one-record-database */
@@ -1007,6 +1025,25 @@ static int open_binary_frm(THD *thd, TABLE_SHARE *share, uchar *head,
         }
       }
     }
+    if (forminfo[46] == (uchar)255)
+    {
+      //reading long table comment
+      if (next_chunk + 2 > buff_end)
+      {
+          DBUG_PRINT("error",
+                     ("long table comment is not defined in .frm"));
+          my_free(buff, MYF(0));
+          goto err;
+      }
+      share->comment.length = uint2korr(next_chunk);
+      if (! (share->comment.str= strmake_root(&share->mem_root,
+             (char*)next_chunk + 2, share->comment.length)))
+      {
+          my_free(buff, MYF(0));
+          goto err;
+      }
+      next_chunk+= 2 + share->comment.length;
+    }
     my_free(buff, MYF(0));
   }
   share->key_block_size= uint2korr(head+62);
@@ -1023,29 +1060,30 @@ static int open_binary_frm(THD *thd, TABLE_SHARE *share, uchar *head,
                        record_offset, MYF(MY_NABP)))
     goto err;                                   /* purecov: inspected */
 
-  mysql_file_seek(file, pos, MY_SEEK_SET, MYF(0));
-  if (mysql_file_read(file, head, 288, MYF(MY_NABP)))
-    goto err;
+  mysql_file_seek(file, pos+288, MY_SEEK_SET, MYF(0));
 #ifdef HAVE_CRYPTED_FRM
   if (crypted)
   {
-    crypted->decode((char*) head+256,288-256);
-    if (sint2korr(head+284) != 0)		// Should be 0
+    crypted->decode((char*) forminfo+256,288-256);
+    if (sint2korr(forminfo+284) != 0)		// Should be 0
       goto err;                                 // Wrong password
   }
 #endif
 
-  share->fields= uint2korr(head+258);
-  pos= uint2korr(head+260);			/* Length of all screens */
-  n_length= uint2korr(head+268);
-  interval_count= uint2korr(head+270);
-  interval_parts= uint2korr(head+272);
-  int_length= uint2korr(head+274);
-  share->null_fields= uint2korr(head+282);
-  com_length= uint2korr(head+284);
-  share->comment.length=  (int) (head[46]);
-  share->comment.str= strmake_root(&share->mem_root, (char*) head+47,
+  share->fields= uint2korr(forminfo+258);
+  pos= uint2korr(forminfo+260);   /* Length of all screens */
+  n_length= uint2korr(forminfo+268);
+  interval_count= uint2korr(forminfo+270);
+  interval_parts= uint2korr(forminfo+272);
+  int_length= uint2korr(forminfo+274);
+  share->null_fields= uint2korr(forminfo+282);
+  com_length= uint2korr(forminfo+284);
+  if (forminfo[46] != (uchar)255)
+  {
+    share->comment.length=  (int) (forminfo[46]);
+    share->comment.str= strmake_root(&share->mem_root, (char*) forminfo+47,
                                      share->comment.length);
+  }
 
   DBUG_PRINT("info",("i_count: %d  i_parts: %d  index: %d  n_length: %d  int_length: %d  com_length: %d", interval_count,interval_parts, share->keys,n_length,int_length, com_length));
 
@@ -2437,12 +2475,14 @@ void append_unescaped(String *res, const char *pos, uint length)
 
 File create_frm(THD *thd, const char *name, const char *db,
                 const char *table, uint reclength, uchar *fileinfo,
-  		HA_CREATE_INFO *create_info, uint keys)
+  		HA_CREATE_INFO *create_info, uint keys, KEY *key_info)
 {
   register File file;
   ulong length;
   uchar fill[IO_SIZE];
   int create_flags= O_RDWR | O_TRUNC;
+  ulong key_comment_total_bytes= 0;
+  uint i;
 
   if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
     create_flags|= O_EXCL | O_NOFOLLOW;
@@ -2479,7 +2519,17 @@ File create_frm(THD *thd, const char *name, const char *db,
       1 byte for the NAMES_SEP_CHAR (after the last name)
       9 extra bytes (padding for safety? alignment?)
     */
-    key_length= keys * (8 + MAX_REF_PARTS * 9 + NAME_LEN + 1) + 16;
+    for (i= 0; i < keys; i++)
+    {
+      DBUG_ASSERT(test(key_info[i].flags & HA_USES_COMMENT) == 
+                 (key_info[i].comment.length > 0));
+      if (key_info[i].flags & HA_USES_COMMENT)
+        key_comment_total_bytes += 2 + key_info[i].comment.length;
+    }
+
+    key_length= keys * (8 + MAX_REF_PARTS * 9 + NAME_LEN + 1) + 16
+                + key_comment_total_bytes;
+
     length= next_io_size((ulong) (IO_SIZE+key_length+reclength+
                                   create_info->extra_size));
     int4store(fileinfo+10,length);

sql/unireg.cc

@@ -188,27 +188,6 @@ bool mysql_create_frm(THD *thd, const char *file_name,
     if (key_info[i].parser_name)
       create_info->extra_size+= key_info[i].parser_name->length + 1;
   }
-
-  if ((file=create_frm(thd, file_name, db, table, reclength, fileinfo,
-		       create_info, keys)) < 0)
-  {
-    my_free(screen_buff, MYF(0));
-    DBUG_RETURN(1);
-  }
-
-  key_buff_length= uint4korr(fileinfo+47);
-  keybuff=(uchar*) my_malloc(key_buff_length, MYF(0));
-  key_info_length= pack_keys(keybuff, keys, key_info, data_offset);
-  (void) get_form_pos(file,fileinfo,&formnames);
-  if (!(filepos=make_new_entry(file,fileinfo,&formnames,"")))
-    goto err;
-  maxlength=(uint) next_io_size((ulong) (uint2korr(forminfo)+1000));
-  int2store(forminfo+2,maxlength);
-  int4store(fileinfo+10,(ulong) (filepos+maxlength));
-  fileinfo[26]= (uchar) test((create_info->max_rows == 1) &&
-			     (create_info->min_rows == 1) && (keys == 0));
-  int2store(fileinfo+28,key_info_length);
-
   /*
     This gives us the byte-position of the character at
     (character-position, not byte-position) TABLE_COMMENT_MAXLEN.
@@ -222,33 +201,78 @@ bool mysql_create_frm(THD *thd, const char *file_name,
     string), the string is too long.
 
     For additional credit, realise that UTF-8 has 1-3 bytes before 6.0,
-    and 1-4 bytes in 6.0 (6.0 also has UTF-32). This means that the
-    inlined COMMENT supposedly does not exceed 60 character plus
-    terminator, vulgo, 181 bytes.
+    and 1-4 bytes in 6.0 (6.0 also has UTF-32).
   */
-
   tmp_len= system_charset_info->cset->charpos(system_charset_info,
                                               create_info->comment.str,
                                               create_info->comment.str +
-                                              create_info->comment.length, 60);
+                                              create_info->comment.length,
+                                              TABLE_COMMENT_MAXLEN);
+
   if (tmp_len < create_info->comment.length)
   {
+    char *real_table_name= (char*) table;
+    List_iterator<Create_field> it(create_fields);
+    Create_field *field;
+    while ((field=it++))
+    {
+      if (field->field && field->field->table &&
+         (real_table_name= field->field->table->s->table_name.str))
+        break;
+    }
     if ((thd->variables.sql_mode &
          (MODE_STRICT_TRANS_TABLES | MODE_STRICT_ALL_TABLES)))
     {
-      my_error(ER_TOO_LONG_TABLE_COMMENT, MYF(0), table, tmp_len);
-      goto err;
+      my_error(ER_TOO_LONG_TABLE_COMMENT, MYF(0),
+               real_table_name, (uint) TABLE_COMMENT_MAXLEN);
+      my_free(screen_buff,MYF(0));
+      DBUG_RETURN(1);
     }
-    push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
-                        ER_TOO_LONG_TABLE_COMMENT,
-                        ER(ER_TOO_LONG_TABLE_COMMENT),
-                        table, tmp_len);
+    char warn_buff[MYSQL_ERRMSG_SIZE];
+    my_snprintf(warn_buff, sizeof(warn_buff), ER(ER_TOO_LONG_TABLE_COMMENT),
+                real_table_name, (uint) TABLE_COMMENT_MAXLEN);
+    /* do not push duplicate warnings */
+    if (!check_duplicate_warning(current_thd, warn_buff, strlen(warn_buff)))
+      push_warning(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
+                   ER_TOO_LONG_TABLE_COMMENT, warn_buff);
     create_info->comment.length= tmp_len;
   }
-
+  /*
+    If table comment is longer than TABLE_COMMENT_INLINE_MAXLEN bytes,
+    store the comment in an extra segment (up to TABLE_COMMENT_MAXLEN bytes).
+    Pre 6.0, the limit was 60 characters, with no extra segment-handling.
+  */
+  if (create_info->comment.length > TABLE_COMMENT_INLINE_MAXLEN)
+  {
+    forminfo[46]=255;
+    create_info->extra_size+= 2 + create_info->comment.length;
+  }
+  else{
     strmake((char*) forminfo+47, create_info->comment.str ?
             create_info->comment.str : "", create_info->comment.length);
     forminfo[46]=(uchar) create_info->comment.length;
+  }
+
+  if ((file=create_frm(thd, file_name, db, table, reclength, fileinfo,
+		       create_info, keys, key_info)) < 0)
+  {
+    my_free(screen_buff, MYF(0));
+    DBUG_RETURN(1);
+  }
+
+  key_buff_length= uint4korr(fileinfo+47);
+  keybuff=(uchar*) my_malloc(key_buff_length, MYF(0));
+  key_info_length= pack_keys(keybuff, keys, key_info, data_offset);
+  (void) get_form_pos(file,fileinfo,&formnames);
+  if (!(filepos=make_new_entry(file,fileinfo,&formnames,"")))
+    goto err;
+  maxlength=(uint) next_io_size((ulong) (uint2korr(forminfo)+1000));
+  int2store(forminfo+2,maxlength);
+  int4store(fileinfo+10,(ulong) (filepos+maxlength));
+  fileinfo[26]= (uchar) test((create_info->max_rows == 1) &&
+			     (create_info->min_rows == 1) && (keys == 0));
+  int2store(fileinfo+28,key_info_length);
+
 #ifdef WITH_PARTITION_STORAGE_ENGINE
   if (part_info)
   {
@@ -309,6 +333,15 @@ bool mysql_create_frm(THD *thd, const char *file_name,
         goto err;
     }
   }
+  if (forminfo[46] == (uchar)255)
+  {
+    uchar comment_length_buff[2];
+    int2store(comment_length_buff,create_info->comment.length);
+    if (mysql_file_write(file, comment_length_buff, 2, MYF(MY_NABP)) ||
+        mysql_file_write(file, (uchar*) create_info->comment.str,
+                         create_info->comment.length, MYF(MY_NABP)))
+      goto err;
+  }
 
   mysql_file_seek(file, filepos, MY_SEEK_SET, MYF(0));
   if (mysql_file_write(file, forminfo, 288, MYF_RW) ||
@@ -561,6 +594,16 @@ static uint pack_keys(uchar *keybuff, uint key_count, KEY *keyinfo,
     pos=tmp;
   }
   *(pos++)=0;
+  for (key=keyinfo,end=keyinfo+key_count ; key != end ; key++)
+  {
+    if (key->flags & HA_USES_COMMENT)
+    {
+      int2store(pos, key->comment.length);
+      uchar *tmp= (uchar*)strnmov((char*) pos+2,key->comment.str,
+                                  key->comment.length);
+      pos= tmp;
+    }
+  }
 
   if (key_count > 127 || key_parts > 127)
   {
@@ -614,19 +657,23 @@ static bool pack_header(uchar *forminfo, enum legacy_db_type table_type,
                                                      field->comment.str,
                                                      field->comment.str +
                                                      field->comment.length,
-                                                     255);
+                                                     COLUMN_COMMENT_MAXLEN);
     if (tmp_len < field->comment.length)
     {
       if ((current_thd->variables.sql_mode &
 	   (MODE_STRICT_TRANS_TABLES | MODE_STRICT_ALL_TABLES)))
       {
-        my_error(ER_TOO_LONG_FIELD_COMMENT, MYF(0), field->field_name, tmp_len);
+        my_error(ER_TOO_LONG_FIELD_COMMENT, MYF(0),
+                 field->field_name, (uint) COLUMN_COMMENT_MAXLEN);
 	DBUG_RETURN(1);
       }
-      push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
-                          ER_TOO_LONG_FIELD_COMMENT,
-                          ER(ER_TOO_LONG_FIELD_COMMENT),
-                          field->field_name, tmp_len);
+      char warn_buff[MYSQL_ERRMSG_SIZE];
+      my_snprintf(warn_buff, sizeof(warn_buff), ER(ER_TOO_LONG_FIELD_COMMENT),
+                  field->field_name, (uint) COLUMN_COMMENT_MAXLEN);
+      /* do not push duplicate warnings */
+      if (!check_duplicate_warning(current_thd, warn_buff, strlen(warn_buff)))
+        push_warning(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
+                     ER_TOO_LONG_FIELD_COMMENT, warn_buff);
       field->comment.length= tmp_len;
     }