longer myisam keys

include/myisam.h

@@ -38,7 +38,7 @@ extern "C" {
 /* The following defines can be increased if necessary */
 #define MI_MAX_KEY	32		/* Max allowed keys */
 #define MI_MAX_KEY_SEG	16		/* Max segments for key */
-#define MI_MAX_KEY_LENGTH 500
+#define MI_MAX_KEY_LENGTH 1000
 
 #define MI_MAX_KEY_BUFF  (MI_MAX_KEY_LENGTH+MI_MAX_KEY_SEG*6+8+8)
 #define MI_MAX_POSSIBLE_KEY_BUFF (1024+6+6)	/* For myisam_chk */

mysql-test/r/ctype_utf8.result

@@ -167,5 +167,5 @@ select hex(s1) from t1;
 hex(s1)
 41
 drop table t1;
-create table t1 (a char(160) character set utf8, primary key(a));
-ERROR 42000: Specified key was too long; max key length is 255 bytes
+create table t1 (a text character set utf8, primary key(a(360)));
+ERROR 42000: Specified key was too long; max key length is 1000 bytes

mysql-test/r/key.result

@@ -185,3 +185,24 @@ NULL	2
 a	1
 a	2
 drop table t1;
+create table t1 (i int, a char(200), b text, unique (a), unique (b(300))) charset utf8;
+insert t1 values (1, repeat('a',210), repeat('b', 310));
+Warnings:
+Warning	1265	Data truncated for column 'a' at row 1
+insert t1 values (2, repeat(0xD0B1,215), repeat(0xD0B1, 310));
+Warnings:
+Warning	1265	Data truncated for column 'a' at row 1
+select i, length(a), length(b), char_length(a), char_length(b) from t1;
+i	length(a)	length(b)	char_length(a)	char_length(b)
+1	200	310	200	310
+2	400	620	200	310
+select i from t1 where a=repeat(_utf8 'a',200);
+i
+1
+select i from t1 where a=repeat(_utf8 0xD0B1,200);
+i
+2
+select i from t1 where b=repeat(_utf8 'b',310);
+i
+1
+drop table t1;

mysql-test/r/myisam.result

@@ -322,11 +322,11 @@ CHECK TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
 drop table t1;
-CREATE TABLE t1 (a varchar(255), b varchar(255), c varchar(255), KEY t1 (a, b, c));
-ERROR 42000: Specified key was too long; max key length is 500 bytes
-CREATE TABLE t1 (a varchar(255), b varchar(255), c varchar(255));
-ALTER TABLE t1 ADD INDEX t1 (a, b, c);
-ERROR 42000: Specified key was too long; max key length is 500 bytes
+CREATE TABLE t1 (a varchar(255), b varchar(255), c varchar(255), d varchar(255), e varchar(255), KEY t1 (a, b, c, d, e));
+ERROR 42000: Specified key was too long; max key length is 1000 bytes
+CREATE TABLE t1 (a varchar(255), b varchar(255), c varchar(255), d varchar(255), e varchar(255));
+ALTER TABLE t1 ADD INDEX t1 (a, b, c, d, e);
+ERROR 42000: Specified key was too long; max key length is 1000 bytes
 DROP TABLE t1;
 CREATE TABLE t1 (a int not null, b int, c int, key(b), key(c), key(a,b), key(c,a));
 INSERT into t1 values (0, null, 0), (0, null, 1), (0, null, 2), (0, null,3), (1,1,4);

mysql-test/r/type_blob.result

@@ -346,16 +346,16 @@ HELLO MY	1
 a	1
 hello	1
 drop table t1;
-create table t1 (a text, unique (a(300)));
-ERROR 42000: Specified key was too long; max key length is 255 bytes
-create table t1 (a text, key (a(300)));
+create table t1 (a text, unique (a(2100)));
+ERROR 42000: Specified key was too long; max key length is 1000 bytes
+create table t1 (a text, key (a(2100)));
 Warnings:
-Warning	1071	Specified key was too long; max key length is 255 bytes
+Warning	1071	Specified key was too long; max key length is 1000 bytes
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
   `a` text,
-  KEY `a` (`a`(255))
+  KEY `a` (`a`(1000))
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 drop table t1;
 CREATE TABLE t1 (

mysql-test/t/ctype_utf8.test

@@ -104,4 +104,4 @@ drop table t1;
 # UTF8 breaks primary keys for cols > 85 characters
 #
 --error 1071
-create table t1 (a char(160) character set utf8, primary key(a));
+create table t1 (a text character set utf8, primary key(a(360)));

mysql-test/t/key.test

@@ -191,3 +191,16 @@ SELECT * FROM t1;
 INSERT INTO t1 (c) VALUES ('a'),('a');
 SELECT * FROM t1;
 drop table t1;
+
+#
+# longer keys
+#
+create table t1 (i int, a char(200), b text, unique (a), unique (b(300))) charset utf8;
+insert t1 values (1, repeat('a',210), repeat('b', 310));
+insert t1 values (2, repeat(0xD0B1,215), repeat(0xD0B1, 310));
+select i, length(a), length(b), char_length(a), char_length(b) from t1;
+select i from t1 where a=repeat(_utf8 'a',200);
+select i from t1 where a=repeat(_utf8 0xD0B1,200);
+select i from t1 where b=repeat(_utf8 'b',310);
+drop table t1;
+

mysql-test/t/myisam.test

@@ -337,10 +337,10 @@ drop table t1;
 #
 
 --error 1071
-CREATE TABLE t1 (a varchar(255), b varchar(255), c varchar(255), KEY t1 (a, b, c));
-CREATE TABLE t1 (a varchar(255), b varchar(255), c varchar(255));
+CREATE TABLE t1 (a varchar(255), b varchar(255), c varchar(255), d varchar(255), e varchar(255), KEY t1 (a, b, c, d, e));
+CREATE TABLE t1 (a varchar(255), b varchar(255), c varchar(255), d varchar(255), e varchar(255));
 --error 1071
-ALTER TABLE t1 ADD INDEX t1 (a, b, c);   
+ALTER TABLE t1 ADD INDEX t1 (a, b, c, d, e);
 DROP TABLE t1;
 
 #

mysql-test/t/type_blob.test

@@ -122,8 +122,8 @@ select d,count(*) from t1 group by d;
 drop table t1;
 
 -- error 1071
-create table t1 (a text, unique (a(300))); # should give an error
-create table t1 (a text, key (a(300)));    # key is auto-truncated
+create table t1 (a text, unique (a(2100))); # should give an error
+create table t1 (a text, key (a(2100)));    # key is auto-truncated
 show create table t1;
 drop table t1;
 

sql/ha_myisam.h

@@ -65,6 +65,7 @@ class ha_myisam: public handler
   uint max_keys()          const { return MI_MAX_KEY; }
   uint max_key_parts()     const { return MAX_REF_PARTS; }
   uint max_key_length()    const { return MI_MAX_KEY_LENGTH; }
+  uint max_key_part_length() { return MI_MAX_KEY_LENGTH; }
   uint checksum() const;
 
   int open(const char *name, int mode, uint test_if_locked);