Bug#57737 Character sets: search fails with like, contraction, index

Problem: LIKE over an indexed column optimized away good results,
because my_like_range_utf32/utf16 returned wrong ranges for contractions.
Contraction related code was missing in my_like_range_utf32/utf16,
but did exist in my_like_range_ucs2/utf8.
It was forgotten in utf32/utf16 versions (during mysql-6.0 push/revert mess).

Fix:
The patch removes individual functions my_like_range_ucs2,
my_like_range_utf16, my_like_range_utf32 and introduces a single function
my_like_range_generic() instead. The new function handles contractions
correctly. It can handle any character set with cs->min_sort_char and
cs->max_sort_char represented in Unicode code points.

added:
  @ mysql-test/include/ctype_czech.inc
  @ mysql-test/include/ctype_like_ignorable.inc
  @ mysql-test/r/ctype_like_range.result
  @ mysql-test/t/ctype_like_range.test
  Adding tests


modified:

  @ include/m_ctype.h
  - Adding helper functions for contractions.
  - Prototypes: removing ucs2,utf16,utf32 functions, adding generic function.
  @ mysql-test/r/ctype_uca.result
  @ mysql-test/r/ctype_utf16_uca.result
  @ mysql-test/r/ctype_utf32_uca.result
  @ mysql-test/t/ctype_uca.test
  @ mysql-test/t/ctype_utf16_uca.test
  @ mysql-test/t/ctype_utf32_uca.test
  - Adding tests.

  @ strings/ctype-mb.c
  - Pad function did not put the last character.
  - Implementing my_like_range_generic() - an universal replacement
    for three separate functions
    my_like_range_ucs2(), my_like_range_utf16() and my_like_range_utf32(),
    with correct contraction handling.

  @ strings/ctype-ucs2.c
  - my_fill_mb2 did not put the high byte, as previously
    it was used to put only characters in ASCII range.
    Now it puts high byte as well
    (needed to pupulate cs->max_sort_char correctly).
  - Adding DBUG_ASSERT()
  - Removing character set specific functions:
    my_like_range_ucs2(), my_like_range_utf16() and my_like_range_utf32().
  - Using my_like_range_generic() instead of the old functions.

  @ strings/ctype-uca.c
  - Using generic function instead of the old character set specific ones.

  @ sql/item_create.cc
  @ sql/item_strfunc.cc
  @ sql/item_strfunc.h
  - Adding SQL functions LIKE_RANGE_MIN and LIKE_RANGE_MAX,
    available only in debug build to make sure like_range()
    works correctly for all character sets and collations. 

17 files changed, 3001 insertions, 344 deletions

diff --git a/include/m_ctype.h b/include/m_ctype.h
index 42e8f88cc0e..c054de8d7fd 100644
--- a/include/m_ctype.h
+++ b/include/m_ctype.h
@@ -356,6 +356,32 @@ extern CHARSET_INFO my_charset_utf8mb4_unicode_ci;
 #define MY_UTF8MB4                 "utf8mb4"
 
 
+/* Helper functions to handle contraction */
+static inline my_bool
+my_cs_have_contractions(CHARSET_INFO *cs)
+{
+  return cs->contractions != NULL;
+}
+
+static inline my_bool
+my_cs_can_be_contraction_head(CHARSET_INFO *cs, my_wc_t wc)
+{
+  return ((const char *)cs->contractions)[0x40*0x40 + (wc & 0xFF)];
+}
+
+static inline my_bool
+my_cs_can_be_contraction_tail(CHARSET_INFO *cs, my_wc_t wc)
+{
+  return ((const char *)cs->contractions)[0x40*0x40 + (wc & 0xFF)];
+}
+
+static inline uint16*
+my_cs_contraction2_weight(CHARSET_INFO *cs, my_wc_t wc1, my_wc_t wc2)
+{
+  return &cs->contractions[(wc1 - 0x40) * 0x40 + wc2 - 0x40];
+}
+
+
 /* declarations for simple charsets */
 extern size_t my_strnxfrm_simple(CHARSET_INFO *, uchar *, size_t,
                                  const uchar *, size_t); 
@@ -430,6 +456,7 @@ ulonglong my_strntoull10rnd_ucs2(CHARSET_INFO *cs,
 
 void my_fill_8bit(CHARSET_INFO *cs, char* to, size_t l, int fill);
 
+/* For 8-bit character set */
 my_bool  my_like_range_simple(CHARSET_INFO *cs,
 			      const char *ptr, size_t ptr_length,
 			      pbool escape, pbool w_one, pbool w_many,
@@ -437,6 +464,7 @@ my_bool  my_like_range_simple(CHARSET_INFO *cs,
 			      char *min_str, char *max_str,
 			      size_t *min_length, size_t *max_length);
 
+/* For ASCII-based multi-byte character sets with mbminlen=1 */
 my_bool  my_like_range_mb(CHARSET_INFO *cs,
 			  const char *ptr, size_t ptr_length,
 			  pbool escape, pbool w_one, pbool w_many,
@@ -444,26 +472,13 @@ my_bool  my_like_range_mb(CHARSET_INFO *cs,
 			  char *min_str, char *max_str,
 			  size_t *min_length, size_t *max_length);
 
-my_bool  my_like_range_ucs2(CHARSET_INFO *cs,
-			    const char *ptr, size_t ptr_length,
-			    pbool escape, pbool w_one, pbool w_many,
-			    size_t res_length,
-			    char *min_str, char *max_str,
-			    size_t *min_length, size_t *max_length);
-
-my_bool  my_like_range_utf16(CHARSET_INFO *cs,
-			     const char *ptr, size_t ptr_length,
-			     pbool escape, pbool w_one, pbool w_many,
-			     size_t res_length,
-			     char *min_str, char *max_str,
-			     size_t *min_length, size_t *max_length);
-
-my_bool  my_like_range_utf32(CHARSET_INFO *cs,
-			     const char *ptr, size_t ptr_length,
-			     pbool escape, pbool w_one, pbool w_many,
-			     size_t res_length,
-			     char *min_str, char *max_str,
-			     size_t *min_length, size_t *max_length);
+/* For other character sets, with arbitrary mbminlen and mbmaxlen numbers */
+my_bool  my_like_range_generic(CHARSET_INFO *cs,
+                               const char *ptr, size_t ptr_length,
+                               pbool escape, pbool w_one, pbool w_many,
+                               size_t res_length,
+                               char *min_str, char *max_str,
+                               size_t *min_length, size_t *max_length);
 
 int my_wildcmp_8bit(CHARSET_INFO *,
 		    const char *str,const char *str_end,
diff --git a/mysql-test/include/ctype_czech.inc b/mysql-test/include/ctype_czech.inc
new file mode 100644
index 00000000000..bc83d462a22
--- /dev/null
+++ b/mysql-test/include/ctype_czech.inc
@@ -0,0 +1,12 @@
+SELECT @@collation_connection;
+--echo #
+--echo # Bug#57737 Character sets: search fails with like, contraction, index
+--echo #
+CREATE TABLE t1 AS SELECT REPEAT(' ', 10) AS s1 LIMIT 0;
+INSERT INTO t1 VALUES ('c'),('ce'),('cé'),('ch');
+SELECT * FROM t1 WHERE s1 LIKE 'c%';
+ALTER TABLE t1 ADD KEY s1 (s1);
+SELECT * FROM t1 WHERE s1 LIKE 'c%';
+ALTER TABLE t1 DROP KEY s1, ADD KEY(s1(1));
+SELECT * FROM t1 WHERE s1 LIKE 'ch';
+DROP TABLE t1;
diff --git a/mysql-test/include/ctype_like_ignorable.inc b/mysql-test/include/ctype_like_ignorable.inc
new file mode 100644
index 00000000000..9f2fa7ae741
--- /dev/null
+++ b/mysql-test/include/ctype_like_ignorable.inc
@@ -0,0 +1,11 @@
+SELECT @@collation_connection;
+--echo #
+--echo # Bug#57737 Character sets: search fails with like, contraction, index
+--echo # Part#2 - ignorable characters
+--echo #
+CREATE TABLE t1 AS SELECT REPEAT(' ', 10) AS s1 LIMIT 0;
+INSERT INTO t1 VALUES ('a\0\0\0\0\0\t'),('a'),('b'),('c'),('d'),('e');
+SELECT HEX(s1) FROM t1 WHERE s1 LIKE 'a%';
+ALTER TABLE t1 ADD KEY s1 (s1);
+SELECT HEX(s1) FROM t1 WHERE s1 LIKE 'a%';
+DROP TABLE t1;
diff --git a/mysql-test/r/ctype_like_range.result b/mysql-test/r/ctype_like_range.result
new file mode 100644
index 00000000000..a06c6ad9ed8
--- /dev/null
+++ b/mysql-test/r/ctype_like_range.result
@@ -0,0 +1,2310 @@
+DROP TABLE IF EXISTS t1;
+DROP VIEW IF EXISTS v1;
+CREATE TABLE t1 (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, a VARBINARY(32));
+INSERT INTO t1 (a) VALUES (''),('_'),('%'),('\_'),('\%'),('\\');
+INSERT INTO t1 (a) VALUES ('a'),('c');
+INSERT INTO t1 (a) VALUES ('a_'),('c_');
+INSERT INTO t1 (a) VALUES ('a%'),('c%');
+INSERT INTO t1 (a) VALUES ('aa'),('cc'),('ch');
+INSERT INTO t1 (a) VALUES ('aa_'),('cc_'),('ch_');
+INSERT INTO t1 (a) VALUES ('aa%'),('cc%'),('ch%');
+INSERT INTO t1 (a) VALUES ('aaa'),('ccc'),('cch');
+INSERT INTO t1 (a) VALUES ('aaa_'),('ccc_'),('cch_');
+INSERT INTO t1 (a) VALUES ('aaa%'),('ccc%'),('cch%');
+INSERT INTO t1 (a) VALUES ('aaaaaaaaaaaaaaaaaaaa');
+CREATE VIEW v1 AS
+SELECT id, 'a' AS name, a AS val FROM t1
+UNION
+SELECT id, 'mn', HEX(LIKE_RANGE_MIN(a, 16)) AS min FROM t1
+UNION
+SELECT id, 'mx', HEX(LIKE_RANGE_MAX(a, 16)) AS max FROM t1
+UNION
+SELECT id, 'sp', REPEAT('-', 32) AS sep FROM t1
+ORDER BY id, name;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
+2	a	_
+2	mn	00
+2	mx	FF
+2	sp	--------------------------------
+3	a	%
+3	mn	
+3	mx	FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+3	sp	--------------------------------
+4	a	\_
+4	mn	5F
+4	mx	5F
+4	sp	--------------------------------
+5	a	\%
+5	mn	25
+5	mx	25
+5	sp	--------------------------------
+6	a	\
+6	mn	5C
+6	mx	5C
+6	sp	--------------------------------
+7	a	a
+7	mn	61
+7	mx	61
+7	sp	--------------------------------
+8	a	c
+8	mn	63
+8	mx	63
+8	sp	--------------------------------
+9	a	a_
+9	mn	6100
+9	mx	61FF
+9	sp	--------------------------------
+10	a	c_
+10	mn	6300
+10	mx	63FF
+10	sp	--------------------------------
+11	a	a%
+11	mn	61
+11	mx	61FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+11	sp	--------------------------------
+12	a	c%
+12	mn	63
+12	mx	63FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+12	sp	--------------------------------
+13	a	aa
+13	mn	6161
+13	mx	6161
+13	sp	--------------------------------
+14	a	cc
+14	mn	6363
+14	mx	6363
+14	sp	--------------------------------
+15	a	ch
+15	mn	6368
+15	mx	6368
+15	sp	--------------------------------
+16	a	aa_
+16	mn	616100
+16	mx	6161FF
+16	sp	--------------------------------
+17	a	cc_
+17	mn	636300
+17	mx	6363FF
+17	sp	--------------------------------
+18	a	ch_
+18	mn	636800
+18	mx	6368FF
+18	sp	--------------------------------
+19	a	aa%
+19	mn	6161
+19	mx	6161FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+19	sp	--------------------------------
+20	a	cc%
+20	mn	6363
+20	mx	6363FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+20	sp	--------------------------------
+21	a	ch%
+21	mn	6368
+21	mx	6368FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+21	sp	--------------------------------
+22	a	aaa
+22	mn	616161
+22	mx	616161
+22	sp	--------------------------------
+23	a	ccc
+23	mn	636363
+23	mx	636363
+23	sp	--------------------------------
+24	a	cch
+24	mn	636368
+24	mx	636368
+24	sp	--------------------------------
+25	a	aaa_
+25	mn	61616100
+25	mx	616161FF
+25	sp	--------------------------------
+26	a	ccc_
+26	mn	63636300
+26	mx	636363FF
+26	sp	--------------------------------
+27	a	cch_
+27	mn	63636800
+27	mx	636368FF
+27	sp	--------------------------------
+28	a	aaa%
+28	mn	616161
+28	mx	616161FFFFFFFFFFFFFFFFFFFFFFFFFF
+28	sp	--------------------------------
+29	a	ccc%
+29	mn	636363
+29	mx	636363FFFFFFFFFFFFFFFFFFFFFFFFFF
+29	sp	--------------------------------
+30	a	cch%
+30	mn	636368
+30	mx	636368FFFFFFFFFFFFFFFFFFFFFFFFFF
+30	sp	--------------------------------
+31	a	aaaaaaaaaaaaaaaaaaaa
+31	mn	61616161616161616161616161616161
+31	mx	61616161616161616161616161616161
+31	sp	--------------------------------
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET latin1;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
+2	a	_
+2	mn	00
+2	mx	FF
+2	sp	--------------------------------
+3	a	%
+3	mn	00000000000000000000000000000000
+3	mx	FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+3	sp	--------------------------------
+4	a	\_
+4	mn	5F
+4	mx	5F
+4	sp	--------------------------------
+5	a	\%
+5	mn	25
+5	mx	25
+5	sp	--------------------------------
+6	a	\
+6	mn	5C
+6	mx	5C
+6	sp	--------------------------------
+7	a	a
+7	mn	61
+7	mx	61
+7	sp	--------------------------------
+8	a	c
+8	mn	63
+8	mx	63
+8	sp	--------------------------------
+9	a	a_
+9	mn	6100
+9	mx	61FF
+9	sp	--------------------------------
+10	a	c_
+10	mn	6300
+10	mx	63FF
+10	sp	--------------------------------
+11	a	a%
+11	mn	61000000000000000000000000000000
+11	mx	61FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+11	sp	--------------------------------
+12	a	c%
+12	mn	63000000000000000000000000000000
+12	mx	63FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+12	sp	--------------------------------
+13	a	aa
+13	mn	6161
+13	mx	6161
+13	sp	--------------------------------
+14	a	cc
+14	mn	6363
+14	mx	6363
+14	sp	--------------------------------
+15	a	ch
+15	mn	6368
+15	mx	6368
+15	sp	--------------------------------
+16	a	aa_
+16	mn	616100
+16	mx	6161FF
+16	sp	--------------------------------
+17	a	cc_
+17	mn	636300
+17	mx	6363FF
+17	sp	--------------------------------
+18	a	ch_
+18	mn	636800
+18	mx	6368FF
+18	sp	--------------------------------
+19	a	aa%
+19	mn	61610000000000000000000000000000
+19	mx	6161FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+19	sp	--------------------------------
+20	a	cc%
+20	mn	63630000000000000000000000000000
+20	mx	6363FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+20	sp	--------------------------------
+21	a	ch%
+21	mn	63680000000000000000000000000000
+21	mx	6368FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+21	sp	--------------------------------
+22	a	aaa
+22	mn	616161
+22	mx	616161
+22	sp	--------------------------------
+23	a	ccc
+23	mn	636363
+23	mx	636363
+23	sp	--------------------------------
+24	a	cch
+24	mn	636368
+24	mx	636368
+24	sp	--------------------------------
+25	a	aaa_
+25	mn	61616100
+25	mx	616161FF
+25	sp	--------------------------------
+26	a	ccc_
+26	mn	63636300
+26	mx	636363FF
+26	sp	--------------------------------
+27	a	cch_
+27	mn	63636800
+27	mx	636368FF
+27	sp	--------------------------------
+28	a	aaa%
+28	mn	61616100000000000000000000000000
+28	mx	616161FFFFFFFFFFFFFFFFFFFFFFFFFF
+28	sp	--------------------------------
+29	a	ccc%
+29	mn	63636300000000000000000000000000
+29	mx	636363FFFFFFFFFFFFFFFFFFFFFFFFFF
+29	sp	--------------------------------
+30	a	cch%
+30	mn	63636800000000000000000000000000
+30	mx	636368FFFFFFFFFFFFFFFFFFFFFFFFFF
+30	sp	--------------------------------
+31	a	aaaaaaaaaaaaaaaaaaaa
+31	mn	61616161616161616161616161616161
+31	mx	61616161616161616161616161616161
+31	sp	--------------------------------
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf8;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
+2	a	_
+2	mn	00000000000000000000000000000000
+2	mx	EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF20
+2	sp	--------------------------------
+3	a	%
+3	mn	00000000000000000000000000000000
+3	mx	EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF20
+3	sp	--------------------------------
+4	a	\_
+4	mn	5F
+4	mx	5F
+4	sp	--------------------------------
+5	a	\%
+5	mn	25
+5	mx	25
+5	sp	--------------------------------
+6	a	\
+6	mn	5C
+6	mx	5C
+6	sp	--------------------------------
+7	a	a
+7	mn	61
+7	mx	61
+7	sp	--------------------------------
+8	a	c
+8	mn	63
+8	mx	63
+8	sp	--------------------------------
+9	a	a_
+9	mn	61000000000000000000000000000000
+9	mx	61EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+9	sp	--------------------------------
+10	a	c_
+10	mn	63000000000000000000000000000000
+10	mx	63EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+10	sp	--------------------------------
+11	a	a%
+11	mn	61000000000000000000000000000000
+11	mx	61EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+11	sp	--------------------------------
+12	a	c%
+12	mn	63000000000000000000000000000000
+12	mx	63EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+12	sp	--------------------------------
+13	a	aa
+13	mn	6161
+13	mx	6161
+13	sp	--------------------------------
+14	a	cc
+14	mn	6363
+14	mx	6363
+14	sp	--------------------------------
+15	a	ch
+15	mn	6368
+15	mx	6368
+15	sp	--------------------------------
+16	a	aa_
+16	mn	61610000000000000000000000000000
+16	mx	6161EFBFBFEFBFBFEFBFBFEFBFBF2020
+16	sp	--------------------------------
+17	a	cc_
+17	mn	63630000000000000000000000000000
+17	mx	6363EFBFBFEFBFBFEFBFBFEFBFBF2020
+17	sp	--------------------------------
+18	a	ch_
+18	mn	63680000000000000000000000000000
+18	mx	6368EFBFBFEFBFBFEFBFBFEFBFBF2020
+18	sp	--------------------------------
+19	a	aa%
+19	mn	61610000000000000000000000000000
+19	mx	6161EFBFBFEFBFBFEFBFBFEFBFBF2020
+19	sp	--------------------------------
+20	a	cc%
+20	mn	63630000000000000000000000000000
+20	mx	6363EFBFBFEFBFBFEFBFBFEFBFBF2020
+20	sp	--------------------------------
+21	a	ch%
+21	mn	63680000000000000000000000000000
+21	mx	6368EFBFBFEFBFBFEFBFBFEFBFBF2020
+21	sp	--------------------------------
+22	a	aaa
+22	mn	616161
+22	mx	616161
+22	sp	--------------------------------
+23	a	ccc
+23	mn	636363
+23	mx	636363
+23	sp	--------------------------------
+24	a	cch
+24	mn	636368
+24	mx	636368
+24	sp	--------------------------------
+25	a	aaa_
+25	mn	61616100000000000000000000000000
+25	mx	616161EFBFBFEFBFBFEFBFBFEFBFBF20
+25	sp	--------------------------------
+26	a	ccc_
+26	mn	63636300000000000000000000000000
+26	mx	636363EFBFBFEFBFBFEFBFBFEFBFBF20
+26	sp	--------------------------------
+27	a	cch_
+27	mn	63636800000000000000000000000000
+27	mx	636368EFBFBFEFBFBFEFBFBFEFBFBF20
+27	sp	--------------------------------
+28	a	aaa%
+28	mn	61616100000000000000000000000000
+28	mx	616161EFBFBFEFBFBFEFBFBFEFBFBF20
+28	sp	--------------------------------
+29	a	ccc%
+29	mn	63636300000000000000000000000000
+29	mx	636363EFBFBFEFBFBFEFBFBFEFBFBF20
+29	sp	--------------------------------
+30	a	cch%
+30	mn	63636800000000000000000000000000
+30	mx	636368EFBFBFEFBFBFEFBFBFEFBFBF20
+30	sp	--------------------------------
+31	a	aaaaaaaaaaaaaaaaaaaa
+31	mn	6161616161
+31	mx	6161616161
+31	sp	--------------------------------
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf8 COLLATE utf8_unicode_ci;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
+2	a	_
+2	mn	09090909090909090909090909090909
+2	mx	EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF20
+2	sp	--------------------------------
+3	a	%
+3	mn	09090909090909090909090909090909
+3	mx	EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF20
+3	sp	--------------------------------
+4	a	\_
+4	mn	5F
+4	mx	5F
+4	sp	--------------------------------
+5	a	\%
+5	mn	25
+5	mx	25
+5	sp	--------------------------------
+6	a	\
+6	mn	5C
+6	mx	5C
+6	sp	--------------------------------
+7	a	a
+7	mn	61
+7	mx	61
+7	sp	--------------------------------
+8	a	c
+8	mn	63
+8	mx	63
+8	sp	--------------------------------
+9	a	a_
+9	mn	61090909090909090909090909090909
+9	mx	61EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+9	sp	--------------------------------
+10	a	c_
+10	mn	63090909090909090909090909090909
+10	mx	63EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+10	sp	--------------------------------
+11	a	a%
+11	mn	61090909090909090909090909090909
+11	mx	61EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+11	sp	--------------------------------
+12	a	c%
+12	mn	63090909090909090909090909090909
+12	mx	63EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+12	sp	--------------------------------
+13	a	aa
+13	mn	6161
+13	mx	6161
+13	sp	--------------------------------
+14	a	cc
+14	mn	6363
+14	mx	6363
+14	sp	--------------------------------
+15	a	ch
+15	mn	6368
+15	mx	6368
+15	sp	--------------------------------
+16	a	aa_
+16	mn	61610909090909090909090909090909
+16	mx	6161EFBFBFEFBFBFEFBFBFEFBFBF2020
+16	sp	--------------------------------
+17	a	cc_
+17	mn	63630909090909090909090909090909
+17	mx	6363EFBFBFEFBFBFEFBFBFEFBFBF2020
+17	sp	--------------------------------
+18	a	ch_
+18	mn	63680909090909090909090909090909
+18	mx	6368EFBFBFEFBFBFEFBFBFEFBFBF2020
+18	sp	--------------------------------
+19	a	aa%
+19	mn	61610909090909090909090909090909
+19	mx	6161EFBFBFEFBFBFEFBFBFEFBFBF2020
+19	sp	--------------------------------
+20	a	cc%
+20	mn	63630909090909090909090909090909
+20	mx	6363EFBFBFEFBFBFEFBFBFEFBFBF2020
+20	sp	--------------------------------
+21	a	ch%
+21	mn	63680909090909090909090909090909
+21	mx	6368EFBFBFEFBFBFEFBFBFEFBFBF2020
+21	sp	--------------------------------
+22	a	aaa
+22	mn	616161
+22	mx	616161
+22	sp	--------------------------------
+23	a	ccc
+23	mn	636363
+23	mx	636363
+23	sp	--------------------------------
+24	a	cch
+24	mn	636368
+24	mx	636368
+24	sp	--------------------------------
+25	a	aaa_
+25	mn	61616109090909090909090909090909
+25	mx	616161EFBFBFEFBFBFEFBFBFEFBFBF20
+25	sp	--------------------------------
+26	a	ccc_
+26	mn	63636309090909090909090909090909
+26	mx	636363EFBFBFEFBFBFEFBFBFEFBFBF20
+26	sp	--------------------------------
+27	a	cch_
+27	mn	63636809090909090909090909090909
+27	mx	636368EFBFBFEFBFBFEFBFBFEFBFBF20
+27	sp	--------------------------------
+28	a	aaa%
+28	mn	61616109090909090909090909090909
+28	mx	616161EFBFBFEFBFBFEFBFBFEFBFBF20
+28	sp	--------------------------------
+29	a	ccc%
+29	mn	63636309090909090909090909090909
+29	mx	636363EFBFBFEFBFBFEFBFBFEFBFBF20
+29	sp	--------------------------------
+30	a	cch%
+30	mn	63636809090909090909090909090909
+30	mx	636368EFBFBFEFBFBFEFBFBFEFBFBF20
+30	sp	--------------------------------
+31	a	aaaaaaaaaaaaaaaaaaaa
+31	mn	6161616161
+31	mx	6161616161
+31	sp	--------------------------------
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf8 COLLATE utf8_czech_ci;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
+2	a	_
+2	mn	09090909090909090909090909090909
+2	mx	EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF20
+2	sp	--------------------------------
+3	a	%
+3	mn	09090909090909090909090909090909
+3	mx	EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF20
+3	sp	--------------------------------
+4	a	\_
+4	mn	5F
+4	mx	5F
+4	sp	--------------------------------
+5	a	\%
+5	mn	25
+5	mx	25
+5	sp	--------------------------------
+6	a	\
+6	mn	5C
+6	mx	5C
+6	sp	--------------------------------
+7	a	a
+7	mn	61
+7	mx	61
+7	sp	--------------------------------
+8	a	c
+8	mn	63
+8	mx	63
+8	sp	--------------------------------
+9	a	a_
+9	mn	61090909090909090909090909090909
+9	mx	61EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+9	sp	--------------------------------
+10	a	c_
+10	mn	09090909090909090909090909090909
+10	mx	EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF20
+10	sp	--------------------------------
+11	a	a%
+11	mn	61090909090909090909090909090909
+11	mx	61EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+11	sp	--------------------------------
+12	a	c%
+12	mn	09090909090909090909090909090909
+12	mx	EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF20
+12	sp	--------------------------------
+13	a	aa
+13	mn	6161
+13	mx	6161
+13	sp	--------------------------------
+14	a	cc
+14	mn	6363
+14	mx	6363
+14	sp	--------------------------------
+15	a	ch
+15	mn	6368
+15	mx	6368
+15	sp	--------------------------------
+16	a	aa_
+16	mn	61610909090909090909090909090909
+16	mx	6161EFBFBFEFBFBFEFBFBFEFBFBF2020
+16	sp	--------------------------------
+17	a	cc_
+17	mn	63090909090909090909090909090909
+17	mx	63EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+17	sp	--------------------------------
+18	a	ch_
+18	mn	63680909090909090909090909090909
+18	mx	6368EFBFBFEFBFBFEFBFBFEFBFBF2020
+18	sp	--------------------------------
+19	a	aa%
+19	mn	61610909090909090909090909090909
+19	mx	6161EFBFBFEFBFBFEFBFBFEFBFBF2020
+19	sp	--------------------------------
+20	a	cc%
+20	mn	63090909090909090909090909090909
+20	mx	63EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+20	sp	--------------------------------
+21	a	ch%
+21	mn	63680909090909090909090909090909
+21	mx	6368EFBFBFEFBFBFEFBFBFEFBFBF2020
+21	sp	--------------------------------
+22	a	aaa
+22	mn	616161
+22	mx	616161
+22	sp	--------------------------------
+23	a	ccc
+23	mn	636363
+23	mx	636363
+23	sp	--------------------------------
+24	a	cch
+24	mn	636368
+24	mx	636368
+24	sp	--------------------------------
+25	a	aaa_
+25	mn	61616109090909090909090909090909
+25	mx	616161EFBFBFEFBFBFEFBFBFEFBFBF20
+25	sp	--------------------------------
+26	a	ccc_
+26	mn	63630909090909090909090909090909
+26	mx	6363EFBFBFEFBFBFEFBFBFEFBFBF2020
+26	sp	--------------------------------
+27	a	cch_
+27	mn	63636809090909090909090909090909
+27	mx	636368EFBFBFEFBFBFEFBFBFEFBFBF20
+27	sp	--------------------------------
+28	a	aaa%
+28	mn	61616109090909090909090909090909
+28	mx	616161EFBFBFEFBFBFEFBFBFEFBFBF20
+28	sp	--------------------------------
+29	a	ccc%
+29	mn	63630909090909090909090909090909
+29	mx	6363EFBFBFEFBFBFEFBFBFEFBFBF2020
+29	sp	--------------------------------
+30	a	cch%
+30	mn	63636809090909090909090909090909
+30	mx	636368EFBFBFEFBFBFEFBFBFEFBFBF20
+30	sp	--------------------------------
+31	a	aaaaaaaaaaaaaaaaaaaa
+31	mn	6161616161
+31	mx	6161616161
+31	sp	--------------------------------
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf8 COLLATE utf8_danish_ci;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
+2	a	_
+2	mn	09090909090909090909090909090909
+2	mx	EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF20
+2	sp	--------------------------------
+3	a	%
+3	mn	09090909090909090909090909090909
+3	mx	EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF20
+3	sp	--------------------------------
+4	a	\_
+4	mn	5F
+4	mx	5F
+4	sp	--------------------------------
+5	a	\%
+5	mn	25
+5	mx	25
+5	sp	--------------------------------
+6	a	\
+6	mn	5C
+6	mx	5C
+6	sp	--------------------------------
+7	a	a
+7	mn	61
+7	mx	61
+7	sp	--------------------------------
+8	a	c
+8	mn	63
+8	mx	63
+8	sp	--------------------------------
+9	a	a_
+9	mn	09090909090909090909090909090909
+9	mx	EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF20
+9	sp	--------------------------------
+10	a	c_
+10	mn	63090909090909090909090909090909
+10	mx	63EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+10	sp	--------------------------------
+11	a	a%
+11	mn	09090909090909090909090909090909
+11	mx	EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF20
+11	sp	--------------------------------
+12	a	c%
+12	mn	63090909090909090909090909090909
+12	mx	63EFBFBFEFBFBFEFBFBFEFBFBFEFBFBF
+12	sp	--------------------------------
+13	a	aa
+13	mn	6161
+13	mx	6161
+13	sp	--------------------------------
+14	a	cc
+14	mn	6363
+14	mx	6363
+14	sp	--------------------------------
+15	a	ch
+15	mn	6368
+15	mx	6368
+15	sp	--------------------------------
+16	a	aa_
+16	mn	61610909090909090909090909090909
+16	mx	6161EFBFBFEFBFBFEFBFBFEFBFBF2020
+16	sp	--------------------------------
+17	a	cc_
+17	mn	63630909090909090909090909090909
+17	mx	6363EFBFBFEFBFBFEFBFBFEFBFBF2020
+17	sp	--------------------------------
+18	a	ch_
+18	mn	63680909090909090909090909090909
+18	mx	6368EFBFBFEFBFBFEFBFBFEFBFBF2020
+18	sp	--------------------------------
+19	a	aa%
+19	mn	61610909090909090909090909090909
+19	mx	6161EFBFBFEFBFBFEFBFBFEFBFBF2020
+19	sp	--------------------------------
+20	a	cc%
+20	mn	63630909090909090909090909090909
+20	mx	6363EFBFBFEFBFBFEFBFBFEFBFBF2020
+20	sp	--------------------------------
+21	a	ch%
+21	mn	63680909090909090909090909090909
+21	mx	6368EFBFBFEFBFBFEFBFBFEFBFBF2020
+21	sp	--------------------------------
+22	a	aaa
+22	mn	616161
+22	mx	616161
+22	sp	--------------------------------
+23	a	ccc
+23	mn	636363
+23	mx	636363
+23	sp	--------------------------------
+24	a	cch
+24	mn	636368
+24	mx	636368
+24	sp	--------------------------------
+25	a	aaa_
+25	mn	61610909090909090909090909090909
+25	mx	6161EFBFBFEFBFBFEFBFBFEFBFBF2020
+25	sp	--------------------------------
+26	a	ccc_
+26	mn	63636309090909090909090909090909
+26	mx	636363EFBFBFEFBFBFEFBFBFEFBFBF20
+26	sp	--------------------------------
+27	a	cch_
+27	mn	63636809090909090909090909090909
+27	mx	636368EFBFBFEFBFBFEFBFBFEFBFBF20
+27	sp	--------------------------------
+28	a	aaa%
+28	mn	61610909090909090909090909090909
+28	mx	6161EFBFBFEFBFBFEFBFBFEFBFBF2020
+28	sp	--------------------------------
+29	a	ccc%
+29	mn	63636309090909090909090909090909
+29	mx	636363EFBFBFEFBFBFEFBFBFEFBFBF20
+29	sp	--------------------------------
+30	a	cch%
+30	mn	63636809090909090909090909090909
+30	mx	636368EFBFBFEFBFBFEFBFBFEFBFBF20
+30	sp	--------------------------------
+31	a	aaaaaaaaaaaaaaaaaaaa
+31	mn	61616161090909090909090909090909
+31	mx	61616161EFBFBFEFBFBFEFBFBFEFBFBF
+31	sp	--------------------------------
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET ucs2;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
+2	a	_
+2	mn	0000
+2	mx	FFFF
+2	sp	--------------------------------
+3	a	%
+3	mn	00000000000000000000000000000000
+3	mx	FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+3	sp	--------------------------------
+4	a	\_
+4	mn	005F
+4	mx	005F
+4	sp	--------------------------------
+5	a	\%
+5	mn	0025
+5	mx	0025
+5	sp	--------------------------------
+6	a	\
+6	mn	005C
+6	mx	005C
+6	sp	--------------------------------
+7	a	a
+7	mn	0061
+7	mx	0061
+7	sp	--------------------------------
+8	a	c
+8	mn	0063
+8	mx	0063
+8	sp	--------------------------------
+9	a	a_
+9	mn	00610000
+9	mx	0061FFFF
+9	sp	--------------------------------
+10	a	c_
+10	mn	00630000
+10	mx	0063FFFF
+10	sp	--------------------------------
+11	a	a%
+11	mn	00610000000000000000000000000000
+11	mx	0061FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+11	sp	--------------------------------
+12	a	c%
+12	mn	00630000000000000000000000000000
+12	mx	0063FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+12	sp	--------------------------------
+13	a	aa
+13	mn	00610061
+13	mx	00610061
+13	sp	--------------------------------
+14	a	cc
+14	mn	00630063
+14	mx	00630063
+14	sp	--------------------------------
+15	a	ch
+15	mn	00630068
+15	mx	00630068
+15	sp	--------------------------------
+16	a	aa_
+16	mn	006100610000
+16	mx	00610061FFFF
+16	sp	--------------------------------
+17	a	cc_
+17	mn	006300630000
+17	mx	00630063FFFF
+17	sp	--------------------------------
+18	a	ch_
+18	mn	006300680000
+18	mx	00630068FFFF
+18	sp	--------------------------------
+19	a	aa%
+19	mn	00610061000000000000000000000000
+19	mx	00610061FFFFFFFFFFFFFFFFFFFFFFFF
+19	sp	--------------------------------
+20	a	cc%
+20	mn	00630063000000000000000000000000
+20	mx	00630063FFFFFFFFFFFFFFFFFFFFFFFF
+20	sp	--------------------------------
+21	a	ch%
+21	mn	00630068000000000000000000000000
+21	mx	00630068FFFFFFFFFFFFFFFFFFFFFFFF
+21	sp	--------------------------------
+22	a	aaa
+22	mn	006100610061
+22	mx	006100610061
+22	sp	--------------------------------
+23	a	ccc
+23	mn	006300630063
+23	mx	006300630063
+23	sp	--------------------------------
+24	a	cch
+24	mn	006300630068
+24	mx	006300630068
+24	sp	--------------------------------
+25	a	aaa_
+25	mn	0061006100610000
+25	mx	006100610061FFFF
+25	sp	--------------------------------
+26	a	ccc_
+26	mn	0063006300630000
+26	mx	006300630063FFFF
+26	sp	--------------------------------
+27	a	cch_
+27	mn	0063006300680000
+27	mx	006300630068FFFF
+27	sp	--------------------------------
+28	a	aaa%
+28	mn	00610061006100000000000000000000
+28	mx	006100610061FFFFFFFFFFFFFFFFFFFF
+28	sp	--------------------------------
+29	a	ccc%
+29	mn	00630063006300000000000000000000
+29	mx	006300630063FFFFFFFFFFFFFFFFFFFF
+29	sp	--------------------------------
+30	a	cch%
+30	mn	00630063006800000000000000000000
+30	mx	006300630068FFFFFFFFFFFFFFFFFFFF
+30	sp	--------------------------------
+31	a	aaaaaaaaaaaaaaaaaaaa
+31	mn	00610061006100610061006100610061
+31	mx	00610061006100610061006100610061
+31	sp	--------------------------------
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET ucs2 COLLATE ucs2_unicode_ci;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
+2	a	_
+2	mn	0009
+2	mx	FFFF
+2	sp	--------------------------------
+3	a	%
+3	mn	00090009000900090009000900090009
+3	mx	FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+3	sp	--------------------------------
+4	a	\_
+4	mn	005F
+4	mx	005F
+4	sp	--------------------------------
+5	a	\%
+5	mn	0025
+5	mx	0025
+5	sp	--------------------------------
+6	a	\
+6	mn	005C
+6	mx	005C
+6	sp	--------------------------------
+7	a	a
+7	mn	0061
+7	mx	0061
+7	sp	--------------------------------
+8	a	c
+8	mn	0063
+8	mx	0063
+8	sp	--------------------------------
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+9	mn	00610009
+9	mx	0061FFFF
+9	sp	--------------------------------
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+10	mn	00630009
+10	mx	0063FFFF
+10	sp	--------------------------------
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+11	mn	00610009000900090009000900090009
+11	mx	0061FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+11	sp	--------------------------------
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+12	mn	00630009000900090009000900090009
+12	mx	0063FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+12	sp	--------------------------------
+13	a	aa
+13	mn	00610061
+13	mx	00610061
+13	sp	--------------------------------
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+14	mn	00630063
+14	mx	00630063
+14	sp	--------------------------------
+15	a	ch
+15	mn	00630068
+15	mx	00630068
+15	sp	--------------------------------
+16	a	aa_
+16	mn	006100610009
+16	mx	00610061FFFF
+16	sp	--------------------------------
+17	a	cc_
+17	mn	006300630009
+17	mx	00630063FFFF
+17	sp	--------------------------------
+18	a	ch_
+18	mn	006300680009
+18	mx	00630068FFFF
+18	sp	--------------------------------
+19	a	aa%
+19	mn	00610061000900090009000900090009
+19	mx	00610061FFFFFFFFFFFFFFFFFFFFFFFF
+19	sp	--------------------------------
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+20	mn	00630063000900090009000900090009
+20	mx	00630063FFFFFFFFFFFFFFFFFFFFFFFF
+20	sp	--------------------------------
+21	a	ch%
+21	mn	00630068000900090009000900090009
+21	mx	00630068FFFFFFFFFFFFFFFFFFFFFFFF
+21	sp	--------------------------------
+22	a	aaa
+22	mn	006100610061
+22	mx	006100610061
+22	sp	--------------------------------
+23	a	ccc
+23	mn	006300630063
+23	mx	006300630063
+23	sp	--------------------------------
+24	a	cch
+24	mn	006300630068
+24	mx	006300630068
+24	sp	--------------------------------
+25	a	aaa_
+25	mn	0061006100610009
+25	mx	006100610061FFFF
+25	sp	--------------------------------
+26	a	ccc_
+26	mn	0063006300630009
+26	mx	006300630063FFFF
+26	sp	--------------------------------
+27	a	cch_
+27	mn	0063006300680009
+27	mx	006300630068FFFF
+27	sp	--------------------------------
+28	a	aaa%
+28	mn	00610061006100090009000900090009
+28	mx	006100610061FFFFFFFFFFFFFFFFFFFF
+28	sp	--------------------------------
+29	a	ccc%
+29	mn	00630063006300090009000900090009
+29	mx	006300630063FFFFFFFFFFFFFFFFFFFF
+29	sp	--------------------------------
+30	a	cch%
+30	mn	00630063006800090009000900090009
+30	mx	006300630068FFFFFFFFFFFFFFFFFFFF
+30	sp	--------------------------------
+31	a	aaaaaaaaaaaaaaaaaaaa
+31	mn	00610061006100610061006100610061
+31	mx	00610061006100610061006100610061
+31	sp	--------------------------------
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET ucs2 COLLATE ucs2_czech_ci;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
+2	a	_
+2	mn	0009
+2	mx	FFFF
+2	sp	--------------------------------
+3	a	%
+3	mn	00090009000900090009000900090009
+3	mx	FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+3	sp	--------------------------------
+4	a	\_
+4	mn	005F
+4	mx	005F
+4	sp	--------------------------------
+5	a	\%
+5	mn	0025
+5	mx	0025
+5	sp	--------------------------------
+6	a	\
+6	mn	005C
+6	mx	005C
+6	sp	--------------------------------
+7	a	a
+7	mn	0061
+7	mx	0061
+7	sp	--------------------------------
+8	a	c
+8	mn	0063
+8	mx	0063
+8	sp	--------------------------------
+9	a	a_
+9	mn	00610009
+9	mx	0061FFFF
+9	sp	--------------------------------
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+10	mn	00090009000900090009000900090009
+10	mx	FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+10	sp	--------------------------------
+11	a	a%
+11	mn	00610009000900090009000900090009
+11	mx	0061FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+11	sp	--------------------------------
+12	a	c%
+12	mn	00090009000900090009000900090009
+12	mx	FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+12	sp	--------------------------------
+13	a	aa
+13	mn	00610061
+13	mx	00610061
+13	sp	--------------------------------
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+14	mn	00630063
+14	mx	00630063
+14	sp	--------------------------------
+15	a	ch
+15	mn	00630068
+15	mx	00630068
+15	sp	--------------------------------
+16	a	aa_
+16	mn	006100610009
+16	mx	00610061FFFF
+16	sp	--------------------------------
+17	a	cc_
+17	mn	00630009000900090009000900090009
+17	mx	0063FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+17	sp	--------------------------------
+18	a	ch_
+18	mn	006300680009
+18	mx	00630068FFFF
+18	sp	--------------------------------
+19	a	aa%
+19	mn	00610061000900090009000900090009
+19	mx	00610061FFFFFFFFFFFFFFFFFFFFFFFF
+19	sp	--------------------------------
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+20	mn	00630009000900090009000900090009
+20	mx	0063FFFFFFFFFFFFFFFFFFFFFFFFFFFF
+20	sp	--------------------------------
+21	a	ch%
+21	mn	00630068000900090009000900090009
+21	mx	00630068FFFFFFFFFFFFFFFFFFFFFFFF
+21	sp	--------------------------------
+22	a	aaa
+22	mn	006100610061
+22	mx	006100610061
+22	sp	--------------------------------
+23	a	ccc
+23	mn	006300630063
+23	mx	006300630063
+23	sp	--------------------------------
+24	a	cch
+24	mn	006300630068
+24	mx	006300630068
+24	sp	--------------------------------
+25	a	aaa_
+25	mn	0061006100610009
+25	mx	006100610061FFFF
+25	sp	--------------------------------
+26	a	ccc_
+26	mn	00630063000900090009000900090009
+26	mx	00630063FFFFFFFFFFFFFFFFFFFFFFFF
+26	sp	--------------------------------
+27	a	cch_
+27	mn	0063006300680009
+27	mx	006300630068FFFF
+27	sp	--------------------------------
+28	a	aaa%
+28	mn	00610061006100090009000900090009
+28	mx	006100610061FFFFFFFFFFFFFFFFFFFF
+28	sp	--------------------------------
+29	a	ccc%
+29	mn	00630063000900090009000900090009
+29	mx	00630063FFFFFFFFFFFFFFFFFFFFFFFF
+29	sp	--------------------------------
+30	a	cch%
+30	mn	00630063006800090009000900090009
+30	mx	006300630068FFFFFFFFFFFFFFFFFFFF
+30	sp	--------------------------------
+31	a	aaaaaaaaaaaaaaaaaaaa
+31	mn	00610061006100610061006100610061
+31	mx	00610061006100610061006100610061
+31	sp	--------------------------------
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET ucs2 COLLATE ucs2_danish_ci;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
+2	a	_
+2	mn	0009
+2	mx	FFFF
+2	sp	--------------------------------
+3	a	%
+3	mn	00090009000900090009000900090009
+3	mx	FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+3	sp	--------------------------------
+4	a	\_
+4	mn	005F
+4	mx	005F
+4	sp	--------------------------------
+5	a	\%
+5	mn	0025
+5	mx	0025
+5	sp	--------------------------------
+6	a	\
+6	mn	005C
+6	mx	005C
+6	sp	--------------------------------
+7	a	a
+7	mn	0061
+7	mx	0061
+7	sp	--------------------------------
+8	a	c
+8	mn	0063
+8	mx	0063
+8	sp	--------------------------------
+9	a	a_
+9	mn	00090009000900090009000900090009
+9	mx	FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+9	sp	--------------------------------
+10	a	c_
+10	mn	00630009
+10	mx	0063FFFF
+10	sp	--------------------------------
+11	a	a%
+11	mn	00090009000900090009000900090009
+11	mx	FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+11	sp	--------------------------------
+12	a	c%
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+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf16;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
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+31	sp	--------------------------------
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf16 COLLATE utf16_unicode_ci;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
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+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf16 COLLATE utf16_czech_ci;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
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+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf16 COLLATE utf16_danish_ci;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
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+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf32;
+SELECT * FROM v1;
+id	name	val
+1	a	
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+1	mx	
+1	sp	--------------------------------
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+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf32 COLLATE utf32_unicode_ci;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
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+20	a	cc%
+20	mn	00000063000000630000000900000009
+20	mx	00000063000000630000FFFF0000FFFF
+20	sp	--------------------------------
+21	a	ch%
+21	mn	00000063000000680000000900000009
+21	mx	00000063000000680000FFFF0000FFFF
+21	sp	--------------------------------
+22	a	aaa
+22	mn	000000610000006100000061
+22	mx	000000610000006100000061
+22	sp	--------------------------------
+23	a	ccc
+23	mn	000000630000006300000063
+23	mx	000000630000006300000063
+23	sp	--------------------------------
+24	a	cch
+24	mn	000000630000006300000068
+24	mx	000000630000006300000068
+24	sp	--------------------------------
+25	a	aaa_
+25	mn	00000061000000610000006100000009
+25	mx	0000006100000061000000610000FFFF
+25	sp	--------------------------------
+26	a	ccc_
+26	mn	00000063000000630000006300000009
+26	mx	0000006300000063000000630000FFFF
+26	sp	--------------------------------
+27	a	cch_
+27	mn	00000063000000630000006800000009
+27	mx	0000006300000063000000680000FFFF
+27	sp	--------------------------------
+28	a	aaa%
+28	mn	00000061000000610000006100000009
+28	mx	0000006100000061000000610000FFFF
+28	sp	--------------------------------
+29	a	ccc%
+29	mn	00000063000000630000006300000009
+29	mx	0000006300000063000000630000FFFF
+29	sp	--------------------------------
+30	a	cch%
+30	mn	00000063000000630000006800000009
+30	mx	0000006300000063000000680000FFFF
+30	sp	--------------------------------
+31	a	aaaaaaaaaaaaaaaaaaaa
+31	mn	00000061000000610000006100000061
+31	mx	00000061000000610000006100000061
+31	sp	--------------------------------
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf32 COLLATE utf32_czech_ci;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
+2	a	_
+2	mn	00000009
+2	mx	0000FFFF
+2	sp	--------------------------------
+3	a	%
+3	mn	00000009000000090000000900000009
+3	mx	0000FFFF0000FFFF0000FFFF0000FFFF
+3	sp	--------------------------------
+4	a	\_
+4	mn	0000005F
+4	mx	0000005F
+4	sp	--------------------------------
+5	a	\%
+5	mn	00000025
+5	mx	00000025
+5	sp	--------------------------------
+6	a	\
+6	mn	0000005C
+6	mx	0000005C
+6	sp	--------------------------------
+7	a	a
+7	mn	00000061
+7	mx	00000061
+7	sp	--------------------------------
+8	a	c
+8	mn	00000063
+8	mx	00000063
+8	sp	--------------------------------
+9	a	a_
+9	mn	0000006100000009
+9	mx	000000610000FFFF
+9	sp	--------------------------------
+10	a	c_
+10	mn	00000009000000090000000900000009
+10	mx	0000FFFF0000FFFF0000FFFF0000FFFF
+10	sp	--------------------------------
+11	a	a%
+11	mn	00000061000000090000000900000009
+11	mx	000000610000FFFF0000FFFF0000FFFF
+11	sp	--------------------------------
+12	a	c%
+12	mn	00000009000000090000000900000009
+12	mx	0000FFFF0000FFFF0000FFFF0000FFFF
+12	sp	--------------------------------
+13	a	aa
+13	mn	0000006100000061
+13	mx	0000006100000061
+13	sp	--------------------------------
+14	a	cc
+14	mn	0000006300000063
+14	mx	0000006300000063
+14	sp	--------------------------------
+15	a	ch
+15	mn	0000006300000068
+15	mx	0000006300000068
+15	sp	--------------------------------
+16	a	aa_
+16	mn	000000610000006100000009
+16	mx	00000061000000610000FFFF
+16	sp	--------------------------------
+17	a	cc_
+17	mn	00000063000000090000000900000009
+17	mx	000000630000FFFF0000FFFF0000FFFF
+17	sp	--------------------------------
+18	a	ch_
+18	mn	000000630000006800000009
+18	mx	00000063000000680000FFFF
+18	sp	--------------------------------
+19	a	aa%
+19	mn	00000061000000610000000900000009
+19	mx	00000061000000610000FFFF0000FFFF
+19	sp	--------------------------------
+20	a	cc%
+20	mn	00000063000000090000000900000009
+20	mx	000000630000FFFF0000FFFF0000FFFF
+20	sp	--------------------------------
+21	a	ch%
+21	mn	00000063000000680000000900000009
+21	mx	00000063000000680000FFFF0000FFFF
+21	sp	--------------------------------
+22	a	aaa
+22	mn	000000610000006100000061
+22	mx	000000610000006100000061
+22	sp	--------------------------------
+23	a	ccc
+23	mn	000000630000006300000063
+23	mx	000000630000006300000063
+23	sp	--------------------------------
+24	a	cch
+24	mn	000000630000006300000068
+24	mx	000000630000006300000068
+24	sp	--------------------------------
+25	a	aaa_
+25	mn	00000061000000610000006100000009
+25	mx	0000006100000061000000610000FFFF
+25	sp	--------------------------------
+26	a	ccc_
+26	mn	00000063000000630000000900000009
+26	mx	00000063000000630000FFFF0000FFFF
+26	sp	--------------------------------
+27	a	cch_
+27	mn	00000063000000630000006800000009
+27	mx	0000006300000063000000680000FFFF
+27	sp	--------------------------------
+28	a	aaa%
+28	mn	00000061000000610000006100000009
+28	mx	0000006100000061000000610000FFFF
+28	sp	--------------------------------
+29	a	ccc%
+29	mn	00000063000000630000000900000009
+29	mx	00000063000000630000FFFF0000FFFF
+29	sp	--------------------------------
+30	a	cch%
+30	mn	00000063000000630000006800000009
+30	mx	0000006300000063000000680000FFFF
+30	sp	--------------------------------
+31	a	aaaaaaaaaaaaaaaaaaaa
+31	mn	00000061000000610000006100000061
+31	mx	00000061000000610000006100000061
+31	sp	--------------------------------
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf32 COLLATE utf32_danish_ci;
+SELECT * FROM v1;
+id	name	val
+1	a	
+1	mn	
+1	mx	
+1	sp	--------------------------------
+2	a	_
+2	mn	00000009
+2	mx	0000FFFF
+2	sp	--------------------------------
+3	a	%
+3	mn	00000009000000090000000900000009
+3	mx	0000FFFF0000FFFF0000FFFF0000FFFF
+3	sp	--------------------------------
+4	a	\_
+4	mn	0000005F
+4	mx	0000005F
+4	sp	--------------------------------
+5	a	\%
+5	mn	00000025
+5	mx	00000025
+5	sp	--------------------------------
+6	a	\
+6	mn	0000005C
+6	mx	0000005C
+6	sp	--------------------------------
+7	a	a
+7	mn	00000061
+7	mx	00000061
+7	sp	--------------------------------
+8	a	c
+8	mn	00000063
+8	mx	00000063
+8	sp	--------------------------------
+9	a	a_
+9	mn	00000009000000090000000900000009
+9	mx	0000FFFF0000FFFF0000FFFF0000FFFF
+9	sp	--------------------------------
+10	a	c_
+10	mn	0000006300000009
+10	mx	000000630000FFFF
+10	sp	--------------------------------
+11	a	a%
+11	mn	00000009000000090000000900000009
+11	mx	0000FFFF0000FFFF0000FFFF0000FFFF
+11	sp	--------------------------------
+12	a	c%
+12	mn	00000063000000090000000900000009
+12	mx	000000630000FFFF0000FFFF0000FFFF
+12	sp	--------------------------------
+13	a	aa
+13	mn	0000006100000061
+13	mx	0000006100000061
+13	sp	--------------------------------
+14	a	cc
+14	mn	0000006300000063
+14	mx	0000006300000063
+14	sp	--------------------------------
+15	a	ch
+15	mn	0000006300000068
+15	mx	0000006300000068
+15	sp	--------------------------------
+16	a	aa_
+16	mn	000000610000006100000009
+16	mx	00000061000000610000FFFF
+16	sp	--------------------------------
+17	a	cc_
+17	mn	000000630000006300000009
+17	mx	00000063000000630000FFFF
+17	sp	--------------------------------
+18	a	ch_
+18	mn	000000630000006800000009
+18	mx	00000063000000680000FFFF
+18	sp	--------------------------------
+19	a	aa%
+19	mn	00000061000000610000000900000009
+19	mx	00000061000000610000FFFF0000FFFF
+19	sp	--------------------------------
+20	a	cc%
+20	mn	00000063000000630000000900000009
+20	mx	00000063000000630000FFFF0000FFFF
+20	sp	--------------------------------
+21	a	ch%
+21	mn	00000063000000680000000900000009
+21	mx	00000063000000680000FFFF0000FFFF
+21	sp	--------------------------------
+22	a	aaa
+22	mn	000000610000006100000061
+22	mx	000000610000006100000061
+22	sp	--------------------------------
+23	a	ccc
+23	mn	000000630000006300000063
+23	mx	000000630000006300000063
+23	sp	--------------------------------
+24	a	cch
+24	mn	000000630000006300000068
+24	mx	000000630000006300000068
+24	sp	--------------------------------
+25	a	aaa_
+25	mn	00000061000000610000000900000009
+25	mx	00000061000000610000FFFF0000FFFF
+25	sp	--------------------------------
+26	a	ccc_
+26	mn	00000063000000630000006300000009
+26	mx	0000006300000063000000630000FFFF
+26	sp	--------------------------------
+27	a	cch_
+27	mn	00000063000000630000006800000009
+27	mx	0000006300000063000000680000FFFF
+27	sp	--------------------------------
+28	a	aaa%
+28	mn	00000061000000610000000900000009
+28	mx	00000061000000610000FFFF0000FFFF
+28	sp	--------------------------------
+29	a	ccc%
+29	mn	00000063000000630000006300000009
+29	mx	0000006300000063000000630000FFFF
+29	sp	--------------------------------
+30	a	cch%
+30	mn	00000063000000630000006800000009
+30	mx	0000006300000063000000680000FFFF
+30	sp	--------------------------------
+31	a	aaaaaaaaaaaaaaaaaaaa
+31	mn	00000061000000610000006100000061
+31	mx	00000061000000610000006100000061
+31	sp	--------------------------------
+DROP VIEW v1;
+DROP TABLE t1;
diff --git a/mysql-test/r/ctype_uca.result b/mysql-test/r/ctype_uca.result
index 04727f84ff2..7b9023578b3 100644
--- a/mysql-test/r/ctype_uca.result
+++ b/mysql-test/r/ctype_uca.result
@@ -2888,3 +2888,101 @@ a	hex(b)	c
 DROP TABLE t1;
 set names utf8;
 End for 5.0 tests
+#
+# Start of 5.5 tests
+#
+SET collation_connection=utf8_czech_ci;
+SELECT @@collation_connection;
+@@collation_connection
+utf8_czech_ci
+#
+# Bug#57737 Character sets: search fails with like, contraction, index
+#
+CREATE TABLE t1 AS SELECT REPEAT(' ', 10) AS s1 LIMIT 0;
+INSERT INTO t1 VALUES ('c'),('ce'),('cé'),('ch');
+SELECT * FROM t1 WHERE s1 LIKE 'c%';
+s1
+c
+ce
+cé
+ch
+ALTER TABLE t1 ADD KEY s1 (s1);
+SELECT * FROM t1 WHERE s1 LIKE 'c%';
+s1
+c
+ce
+cé
+ch
+ALTER TABLE t1 DROP KEY s1, ADD KEY(s1(1));
+SELECT * FROM t1 WHERE s1 LIKE 'ch';
+s1
+ch
+DROP TABLE t1;
+SELECT @@collation_connection;
+@@collation_connection
+utf8_czech_ci
+#
+# Bug#57737 Character sets: search fails with like, contraction, index
+# Part#2 - ignorable characters
+#
+CREATE TABLE t1 AS SELECT REPEAT(' ', 10) AS s1 LIMIT 0;
+INSERT INTO t1 VALUES ('a\0\0\0\0\0\t'),('a'),('b'),('c'),('d'),('e');
+SELECT HEX(s1) FROM t1 WHERE s1 LIKE 'a%';
+HEX(s1)
+61000000000009
+61
+ALTER TABLE t1 ADD KEY s1 (s1);
+SELECT HEX(s1) FROM t1 WHERE s1 LIKE 'a%';
+HEX(s1)
+61000000000009
+61
+DROP TABLE t1;
+SET collation_connection=ucs2_czech_ci;
+SELECT @@collation_connection;
+@@collation_connection
+ucs2_czech_ci
+#
+# Bug#57737 Character sets: search fails with like, contraction, index
+#
+CREATE TABLE t1 AS SELECT REPEAT(' ', 10) AS s1 LIMIT 0;
+INSERT INTO t1 VALUES ('c'),('ce'),('cé'),('ch');
+SELECT * FROM t1 WHERE s1 LIKE 'c%';
+s1
+c
+ce
+cé
+ch
+ALTER TABLE t1 ADD KEY s1 (s1);
+SELECT * FROM t1 WHERE s1 LIKE 'c%';
+s1
+c
+ce
+cé
+ch
+ALTER TABLE t1 DROP KEY s1, ADD KEY(s1(1));
+SELECT * FROM t1 WHERE s1 LIKE 'ch';
+s1
+ch
+DROP TABLE t1;
+SELECT @@collation_connection;
+@@collation_connection
+ucs2_czech_ci
+#
+# Bug#57737 Character sets: search fails with like, contraction, index
+# Part#2 - ignorable characters
+#
+CREATE TABLE t1 AS SELECT REPEAT(' ', 10) AS s1 LIMIT 0;
+INSERT INTO t1 VALUES ('a\0\0\0\0\0\t'),('a'),('b'),('c'),('d'),('e');
+SELECT HEX(s1) FROM t1 WHERE s1 LIKE 'a%';
+HEX(s1)
+0061000000000000000000000009
+0061
+ALTER TABLE t1 ADD KEY s1 (s1);
+SELECT HEX(s1) FROM t1 WHERE s1 LIKE 'a%';
+HEX(s1)
+0061000000000000000000000009
+0061
+DROP TABLE t1;
+#
+# End of 5.5 tests
+#
diff --git a/mysql-test/r/ctype_utf16_uca.result b/mysql-test/r/ctype_utf16_uca.result
index d83ef2af09e..18adaf2f79c 100644
--- a/mysql-test/r/ctype_utf16_uca.result
+++ b/mysql-test/r/ctype_utf16_uca.result
@@ -2368,6 +2368,52 @@ NULL
 NULL
 NULL
 drop table t1;
+SET collation_connection=utf16_czech_ci;
+SELECT @@collation_connection;
+@@collation_connection
+utf16_czech_ci
+#
+# Bug#57737 Character sets: search fails with like, contraction, index
+#
+CREATE TABLE t1 AS SELECT REPEAT(' ', 10) AS s1 LIMIT 0;
+INSERT INTO t1 VALUES ('c'),('ce'),('cé'),('ch');
+SELECT * FROM t1 WHERE s1 LIKE 'c%';
+s1
+c
+ce
+cé
+ch
+ALTER TABLE t1 ADD KEY s1 (s1);
+SELECT * FROM t1 WHERE s1 LIKE 'c%';
+s1
+c
+ce
+cé
+ch
+ALTER TABLE t1 DROP KEY s1, ADD KEY(s1(1));
+SELECT * FROM t1 WHERE s1 LIKE 'ch';
+s1
+ch
+DROP TABLE t1;
+SELECT @@collation_connection;
+@@collation_connection
+utf16_czech_ci
+#
+# Bug#57737 Character sets: search fails with like, contraction, index
+# Part#2 - ignorable characters
+#
+CREATE TABLE t1 AS SELECT REPEAT(' ', 10) AS s1 LIMIT 0;
+INSERT INTO t1 VALUES ('a\0\0\0\0\0\t'),('a'),('b'),('c'),('d'),('e');
+SELECT HEX(s1) FROM t1 WHERE s1 LIKE 'a%';
+HEX(s1)
+0061000000000000000000000009
+0061
+ALTER TABLE t1 ADD KEY s1 (s1);
+SELECT HEX(s1) FROM t1 WHERE s1 LIKE 'a%';
+HEX(s1)
+0061000000000000000000000009
+0061
+DROP TABLE t1;
 #
 # End of 5.5 tests
 #
diff --git a/mysql-test/r/ctype_utf32_uca.result b/mysql-test/r/ctype_utf32_uca.result
index 5006009fc9c..fd5a4199217 100644
--- a/mysql-test/r/ctype_utf32_uca.result
+++ b/mysql-test/r/ctype_utf32_uca.result
@@ -2368,6 +2368,52 @@ NULL
 NULL
 NULL
 drop table t1;
+SET collation_connection=utf32_czech_ci;
+SELECT @@collation_connection;
+@@collation_connection
+utf32_czech_ci
+#
+# Bug#57737 Character sets: search fails with like, contraction, index
+#
+CREATE TABLE t1 AS SELECT REPEAT(' ', 10) AS s1 LIMIT 0;
+INSERT INTO t1 VALUES ('c'),('ce'),('cé'),('ch');
+SELECT * FROM t1 WHERE s1 LIKE 'c%';
+s1
+c
+ce
+cé
+ch
+ALTER TABLE t1 ADD KEY s1 (s1);
+SELECT * FROM t1 WHERE s1 LIKE 'c%';
+s1
+c
+ce
+cé
+ch
+ALTER TABLE t1 DROP KEY s1, ADD KEY(s1(1));
+SELECT * FROM t1 WHERE s1 LIKE 'ch';
+s1
+ch
+DROP TABLE t1;
+SELECT @@collation_connection;
+@@collation_connection
+utf32_czech_ci
+#
+# Bug#57737 Character sets: search fails with like, contraction, index
+# Part#2 - ignorable characters
+#
+CREATE TABLE t1 AS SELECT REPEAT(' ', 10) AS s1 LIMIT 0;
+INSERT INTO t1 VALUES ('a\0\0\0\0\0\t'),('a'),('b'),('c'),('d'),('e');
+SELECT HEX(s1) FROM t1 WHERE s1 LIKE 'a%';
+HEX(s1)
+00000061000000000000000000000000000000000000000000000009
+00000061
+ALTER TABLE t1 ADD KEY s1 (s1);
+SELECT HEX(s1) FROM t1 WHERE s1 LIKE 'a%';
+HEX(s1)
+00000061000000000000000000000000000000000000000000000009
+00000061
+DROP TABLE t1;
 #
 # End of 5.5 tests
 #
diff --git a/mysql-test/t/ctype_like_range.test b/mysql-test/t/ctype_like_range.test
new file mode 100644
index 00000000000..34a7637222b
--- /dev/null
+++ b/mysql-test/t/ctype_like_range.test
@@ -0,0 +1,87 @@
+--source include/have_debug.inc
+--source include/have_ucs2.inc
+--source include/have_utf16.inc
+--source include/have_utf32.inc
+
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+DROP VIEW IF EXISTS v1;
+--enable_warnings
+
+CREATE TABLE t1 (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, a VARBINARY(32));
+INSERT INTO t1 (a) VALUES (''),('_'),('%'),('\_'),('\%'),('\\');
+INSERT INTO t1 (a) VALUES ('a'),('c');
+INSERT INTO t1 (a) VALUES ('a_'),('c_');
+INSERT INTO t1 (a) VALUES ('a%'),('c%');
+INSERT INTO t1 (a) VALUES ('aa'),('cc'),('ch');
+INSERT INTO t1 (a) VALUES ('aa_'),('cc_'),('ch_');
+INSERT INTO t1 (a) VALUES ('aa%'),('cc%'),('ch%');
+INSERT INTO t1 (a) VALUES ('aaa'),('ccc'),('cch');
+INSERT INTO t1 (a) VALUES ('aaa_'),('ccc_'),('cch_');
+INSERT INTO t1 (a) VALUES ('aaa%'),('ccc%'),('cch%');
+INSERT INTO t1 (a) VALUES ('aaaaaaaaaaaaaaaaaaaa');
+
+CREATE VIEW v1 AS
+  SELECT id, 'a' AS name, a AS val FROM t1
+UNION
+  SELECT id, 'mn', HEX(LIKE_RANGE_MIN(a, 16)) AS min FROM t1
+UNION
+  SELECT id, 'mx', HEX(LIKE_RANGE_MAX(a, 16)) AS max FROM t1
+UNION
+  SELECT id, 'sp', REPEAT('-', 32) AS sep FROM t1
+ORDER BY id, name;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET latin1;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf8;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf8 COLLATE utf8_unicode_ci;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf8 COLLATE utf8_czech_ci;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf8 COLLATE utf8_danish_ci;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET ucs2;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET ucs2 COLLATE ucs2_unicode_ci;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET ucs2 COLLATE ucs2_czech_ci;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET ucs2 COLLATE ucs2_danish_ci;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf16;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf16 COLLATE utf16_unicode_ci;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf16 COLLATE utf16_czech_ci;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf16 COLLATE utf16_danish_ci;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf32;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf32 COLLATE utf32_unicode_ci;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf32 COLLATE utf32_czech_ci;
+SELECT * FROM v1;
+
+ALTER TABLE t1 MODIFY a VARCHAR(32) CHARACTER SET utf32 COLLATE utf32_danish_ci;
+SELECT * FROM v1;
+
+DROP VIEW v1;
+DROP TABLE t1;
diff --git a/mysql-test/t/ctype_uca.test b/mysql-test/t/ctype_uca.test
index 11a489ba24d..723962bbb3f 100644
--- a/mysql-test/t/ctype_uca.test
+++ b/mysql-test/t/ctype_uca.test
@@ -545,3 +545,19 @@ set collation_connection=ucs2_unicode_ci;
 set names utf8;
 
 -- echo End for 5.0 tests
+
+--echo #
+--echo # Start of 5.5 tests
+--echo #
+#
+# Test my_like_range and contractions
+#
+SET collation_connection=utf8_czech_ci;
+--source include/ctype_czech.inc
+--source include/ctype_like_ignorable.inc
+SET collation_connection=ucs2_czech_ci;
+--source include/ctype_czech.inc
+--source include/ctype_like_ignorable.inc
+--echo #
+--echo # End of 5.5 tests
+--echo #
diff --git a/mysql-test/t/ctype_utf16_uca.test b/mysql-test/t/ctype_utf16_uca.test
index 5314777c6f4..a6295c82dec 100644
--- a/mysql-test/t/ctype_utf16_uca.test
+++ b/mysql-test/t/ctype_utf16_uca.test
@@ -284,6 +284,13 @@ DROP TABLE IF EXISTS t1;
 set collation_connection=utf16_unicode_ci;
 --source include/ctype_regex.inc
 
+#
+# Test my_like_range and contractions
+#
+SET collation_connection=utf16_czech_ci;
+--source include/ctype_czech.inc
+--source include/ctype_like_ignorable.inc
+
 
 --echo #
 --echo # End of 5.5 tests
diff --git a/mysql-test/t/ctype_utf32_uca.test b/mysql-test/t/ctype_utf32_uca.test
index 9386cc9e65e..a62ffbf95c7 100644
--- a/mysql-test/t/ctype_utf32_uca.test
+++ b/mysql-test/t/ctype_utf32_uca.test
@@ -286,6 +286,14 @@ set collation_connection=utf32_unicode_ci;
 --source include/ctype_regex.inc
 
 
+#
+# Test my_like_range and contractions
+#
+SET collation_connection=utf32_czech_ci;
+--source include/ctype_czech.inc
+--source include/ctype_like_ignorable.inc
+
+
 --echo #
 --echo # End of 5.5 tests
 --echo #
diff --git a/sql/item_create.cc b/sql/item_create.cc
index 672e59986d5..1ae65926013 100644
--- a/sql/item_create.cc
+++ b/sql/item_create.cc
@@ -1330,6 +1330,34 @@ protected:
 };
 
 
+#ifndef DBUG_OFF
+class Create_func_like_range_min : public Create_func_arg2
+{
+public:
+  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
+
+  static Create_func_like_range_min s_singleton;
+
+protected:
+  Create_func_like_range_min() {}
+  virtual ~Create_func_like_range_min() {}
+};
+
+
+class Create_func_like_range_max : public Create_func_arg2
+{
+public:
+  virtual Item *create(THD *thd, Item *arg1, Item *arg2);
+
+  static Create_func_like_range_max s_singleton;
+
+protected:
+  Create_func_like_range_max() {}
+  virtual ~Create_func_like_range_max() {}
+};
+#endif
+
+
 class Create_func_ln : public Create_func_arg1
 {
 public:
@@ -3836,6 +3864,26 @@ Create_func_length::create(THD *thd, Item *arg1)
 }
 
 
+#ifndef DBUG_OFF
+Create_func_like_range_min Create_func_like_range_min::s_singleton;
+
+Item*
+Create_func_like_range_min::create(THD *thd, Item *arg1, Item *arg2)
+{
+  return new (thd->mem_root) Item_func_like_range_min(arg1, arg2);
+}
+
+
+Create_func_like_range_max Create_func_like_range_max::s_singleton;
+
+Item*
+Create_func_like_range_max::create(THD *thd, Item *arg1, Item *arg2)
+{
+  return new (thd->mem_root) Item_func_like_range_max(arg1, arg2);
+}
+#endif
+
+
 Create_func_ln Create_func_ln::s_singleton;
 
 Item*
@@ -4924,6 +4972,10 @@ static Native_func_registry func_array[] =
   { { C_STRING_WITH_LEN("LCASE") }, BUILDER(Create_func_lcase)},
   { { C_STRING_WITH_LEN("LEAST") }, BUILDER(Create_func_least)},
   { { C_STRING_WITH_LEN("LENGTH") }, BUILDER(Create_func_length)},
+#ifndef DBUG_OFF
+  { { C_STRING_WITH_LEN("LIKE_RANGE_MIN") }, BUILDER(Create_func_like_range_min)},
+  { { C_STRING_WITH_LEN("LIKE_RANGE_MAX") }, BUILDER(Create_func_like_range_max)},
+#endif
   { { C_STRING_WITH_LEN("LINEFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
   { { C_STRING_WITH_LEN("LINEFROMWKB") }, GEOM_BUILDER(Create_func_geometry_from_wkb)},
   { { C_STRING_WITH_LEN("LINESTRINGFROMTEXT") }, GEOM_BUILDER(Create_func_geometry_from_text)},
diff --git a/sql/item_strfunc.cc b/sql/item_strfunc.cc
index 89c1e785c71..803a5367bc6 100644
--- a/sql/item_strfunc.cc
+++ b/sql/item_strfunc.cc
@@ -3128,6 +3128,41 @@ String *Item_func_unhex::val_str(String *str)
 }
 
 
+#ifndef DBUG_OFF
+String *Item_func_like_range::val_str(String *str)
+{
+  DBUG_ASSERT(fixed == 1);
+  longlong nbytes= args[1]->val_int();
+  String *res= args[0]->val_str(str);
+  size_t min_len, max_len;
+  CHARSET_INFO *cs= collation.collation;
+
+  if (!res || args[0]->null_value || args[1]->null_value ||
+      nbytes < 0 || nbytes > MAX_BLOB_WIDTH ||
+      min_str.alloc(nbytes) || max_str.alloc(nbytes))
+    goto err;
+  null_value=0;
+
+  if (cs->coll->like_range(cs, res->ptr(), res->length(),
+                           '\\', '_', '%', nbytes,
+                           (char*) min_str.ptr(), (char*) max_str.ptr(),
+                           &min_len, &max_len))
+    goto err;
+
+  min_str.set_charset(collation.collation);
+  max_str.set_charset(collation.collation);
+  min_str.length(min_len);
+  max_str.length(max_len);
+
+  return is_min ? &min_str : &max_str;
+
+err:
+  null_value= 1;
+  return 0;
+}
+#endif
+
+
 void Item_func_binary::print(String *str, enum_query_type query_type)
 {
   str->append(STRING_WITH_LEN("cast("));
diff --git a/sql/item_strfunc.h b/sql/item_strfunc.h
index 5dcef2e671f..d76e139883c 100644
--- a/sql/item_strfunc.h
+++ b/sql/item_strfunc.h
@@ -657,6 +657,46 @@ public:
 };
 
 
+#ifndef DBUG_OFF
+class Item_func_like_range :public Item_str_func
+{
+protected:
+  String min_str;
+  String max_str;
+  const bool is_min;
+public:
+  Item_func_like_range(Item *a, Item *b, bool is_min_arg)
+    :Item_str_func(a, b), is_min(is_min_arg)
+  { maybe_null= 1; }
+  String *val_str(String *);
+  void fix_length_and_dec()
+  {
+    collation.set(args[0]->collation);
+    decimals=0;
+    max_length= MAX_BLOB_WIDTH;
+  }
+};
+
+
+class Item_func_like_range_min :public Item_func_like_range
+{
+public:
+  Item_func_like_range_min(Item *a, Item *b) 
+    :Item_func_like_range(a, b, true) { }
+  const char *func_name() const { return "like_range_min"; }
+};
+
+
+class Item_func_like_range_max :public Item_func_like_range
+{
+public:
+  Item_func_like_range_max(Item *a, Item *b)
+    :Item_func_like_range(a, b, false) { }
+  const char *func_name() const { return "like_range_max"; }
+};
+#endif
+
+
 class Item_func_binary :public Item_str_func
 {
 public:
diff --git a/strings/ctype-mb.c b/strings/ctype-mb.c
index b2f2e3cd22e..8b985b7405b 100644
--- a/strings/ctype-mb.c
+++ b/strings/ctype-mb.c
@@ -636,7 +636,7 @@ static void pad_max_char(CHARSET_INFO *cs, char *str, char *end)
   DBUG_ASSERT(buflen > 0);
   do
   {
-    if ((str + buflen) < end)
+    if ((str + buflen) <= end)
     {
       /* Enough space for the characer */
       memcpy(str, buf, buflen);
@@ -802,6 +802,192 @@ fill_max_and_min:
 }
 
 
+/**
+   Calculate min_str and max_str that ranges a LIKE string.
+   Generic function, currently used for ucs2, utf16, utf32,
+   but should be suitable for any other character sets with
+   cs->min_sort_char and cs->max_sort_char represented in
+   Unicode code points.
+
+   @param cs           Character set and collation pointer
+   @param ptr          Pointer to LIKE pattern.
+   @param ptr_length   Length of LIKE pattern.
+   @param escape       Escape character pattern,  typically '\'.
+   @param w_one        'One character' pattern,   typically '_'.
+   @param w_many       'Many characters' pattern, typically '%'.
+   @param res_length   Length of min_str and max_str.
+
+   @param[out] min_str Smallest string that ranges LIKE.
+   @param[out] max_str Largest string that ranges LIKE.
+   @param[out] min_len Length of min_str
+   @param[out] max_len Length of max_str
+
+   @return Optimization status.
+   @retval FALSE if LIKE pattern can be optimized
+   @rerval TRUE if LIKE can't be optimized.
+*/
+my_bool
+my_like_range_generic(CHARSET_INFO *cs,
+                      const char *ptr, size_t ptr_length,
+                      pbool escape, pbool w_one, pbool w_many,
+                      size_t res_length,
+                      char *min_str,char *max_str,
+                      size_t *min_length,size_t *max_length)
+{
+  const char *end= ptr + ptr_length;
+  const char *min_org= min_str;
+  const char *max_org= max_str;
+  char *min_end= min_str + res_length;
+  char *max_end= max_str + res_length;
+  size_t charlen= res_length / cs->mbmaxlen;
+  size_t res_length_diff;
+  my_bool have_contractions= my_cs_have_contractions(cs);
+
+  for ( ; charlen > 0; charlen--)
+  {
+    my_wc_t wc, wc2;
+    int res;
+    if ((res= cs->cset->mb_wc(cs, &wc, (uchar*) ptr, (uchar*) end)) <= 0)
+    {
+      if (res == MY_CS_ILSEQ) /* Bad sequence */
+        return TRUE; /* min_length and max_length are not important */
+      break; /* End of the string */
+    }
+    ptr+= res;
+
+    if (wc == (my_wc_t) escape)
+    {
+      if ((res= cs->cset->mb_wc(cs, &wc, (uchar*) ptr, (uchar*) end)) <= 0)
+      {
+        if (res == MY_CS_ILSEQ)
+          return TRUE; /* min_length and max_length are not important */
+        /*
+           End of the string: Escape is the last character.
+           Put escape as a normal character.
+           We'll will leave the loop on the next iteration.
+        */
+      }
+      else
+        ptr+= res;
+
+      /* Put escape character to min_str and max_str  */
+      if ((res= cs->cset->wc_mb(cs, wc,
+                                (uchar*) min_str, (uchar*) min_end)) <= 0)
+        goto pad_set_lengths; /* No space */
+      min_str+= res;
+
+      if ((res= cs->cset->wc_mb(cs, wc,
+                                (uchar*) max_str, (uchar*) max_end)) <= 0)
+        goto pad_set_lengths; /* No space */
+      max_str+= res;
+      continue;
+    }
+    else if (wc == (my_wc_t) w_one)
+    {
+      if ((res= cs->cset->wc_mb(cs, cs->min_sort_char,
+                                (uchar*) min_str, (uchar*) min_end)) <= 0)
+        goto pad_set_lengths;
+      min_str+= res;
+
+      if ((res= cs->cset->wc_mb(cs, cs->max_sort_char,
+                                (uchar*) max_str, (uchar*) max_end)) <= 0)
+        goto pad_set_lengths;
+      max_str+= res;
+      continue;
+    }
+    else if (wc == (my_wc_t) w_many)
+    {
+      /*
+        Calculate length of keys:
+        a\min\min... is the smallest possible string
+        a\max\max... is the biggest possible string
+      */
+      *min_length= ((cs->state & MY_CS_BINSORT) ?
+                    (size_t) (min_str - min_org) :
+                    res_length);
+      *max_length= res_length;
+      goto pad_min_max;
+    }
+
+    if (have_contractions &&
+        my_cs_can_be_contraction_head(cs, wc) &&
+        (res= cs->cset->mb_wc(cs, &wc2, (uchar*) ptr, (uchar*) end)) > 0)
+    {
+      uint16 *weight;
+      if ((wc2 == (my_wc_t) w_one || wc2 == (my_wc_t) w_many))
+      {
+        /* Contraction head followed by a wildcard */
+        *min_length= *max_length= res_length;
+        goto pad_min_max;
+      }
+
+      if (my_cs_can_be_contraction_tail(cs, wc2) &&
+          (weight= my_cs_contraction2_weight(cs, wc, wc2)) && weight[0])
+      {
+        /* Contraction found */
+        if (charlen == 1)
+        {
+          /* contraction does not fit to result */
+          *min_length= *max_length= res_length;
+          goto pad_min_max;
+        }
+
+        ptr+= res;
+        charlen--;
+
+        /* Put contraction head */
+        if ((res= cs->cset->wc_mb(cs, wc,
+                                  (uchar*) min_str, (uchar*) min_end)) <= 0)
+          goto pad_set_lengths;
+        min_str+= res;
+
+        if ((res= cs->cset->wc_mb(cs, wc,
+                                  (uchar*) max_str, (uchar*) max_end)) <= 0)
+          goto pad_set_lengths;
+        max_str+= res;
+        wc= wc2; /* Prepare to put contraction tail */
+      }
+    }
+
+    /* Normal character, or contraction tail */
+    if ((res= cs->cset->wc_mb(cs, wc,
+                              (uchar*) min_str, (uchar*) min_end)) <= 0)
+      goto pad_set_lengths;
+    min_str+= res;
+    if ((res= cs->cset->wc_mb(cs, wc,
+                              (uchar*) max_str, (uchar*) max_end)) <= 0)
+      goto pad_set_lengths;
+    max_str+= res;
+  }
+
+pad_set_lengths:
+  *min_length= (size_t) (min_str - min_org);
+  *max_length= (size_t) (max_str - max_org);
+
+pad_min_max:
+  /*
+    Fill up max_str and min_str to res_length.
+    fill() cannot set incomplete characters and
+    requires that "length" argument is divisible to mbminlen.
+    Make sure to call fill() with proper "length" argument.
+  */
+  res_length_diff= res_length % cs->mbminlen;
+  cs->cset->fill(cs, min_str, min_end - min_str - res_length_diff,
+                 cs->min_sort_char);
+  cs->cset->fill(cs, max_str, max_end - max_str - res_length_diff,
+                 cs->max_sort_char);
+
+  /* In case of incomplete characters set the remainder to 0x00's */
+  if (res_length_diff)
+  {
+    /* Example: odd res_length for ucs2 */
+    memset(min_end - res_length_diff, 0, res_length_diff);
+    memset(max_end - res_length_diff, 0, res_length_diff);
+  }
+  return FALSE;
+}
+
+
 int
 my_wildcmp_mb_bin(CHARSET_INFO *cs,
                   const char *str,const char *str_end,
diff --git a/strings/ctype-uca.c b/strings/ctype-uca.c
index 3cf61b213eb..2f7bf030d90 100644
--- a/strings/ctype-uca.c
+++ b/strings/ctype-uca.c
@@ -8127,7 +8127,7 @@ MY_COLLATION_HANDLER my_collation_ucs2_uca_handler =
   my_strnncollsp_ucs2_uca,
   my_strnxfrm_ucs2_uca,
   my_strnxfrmlen_simple,
-  my_like_range_ucs2,
+  my_like_range_generic,
   my_wildcmp_uca,
   NULL,
   my_instr_mb,
@@ -10134,7 +10134,7 @@ MY_COLLATION_HANDLER my_collation_utf32_uca_handler =
     my_strnncollsp_any_uca,
     my_strnxfrm_any_uca,
     my_strnxfrmlen_simple,
-    my_like_range_utf32,
+    my_like_range_generic,
     my_wildcmp_uca,
     NULL,
     my_instr_mb,
@@ -10801,7 +10801,7 @@ MY_COLLATION_HANDLER my_collation_utf16_uca_handler =
     my_strnncollsp_any_uca,
     my_strnxfrm_any_uca,
     my_strnxfrmlen_simple,
-    my_like_range_utf16,
+    my_like_range_generic,
     my_wildcmp_uca,
     NULL,
     my_instr_mb,
diff --git a/strings/ctype-ucs2.c b/strings/ctype-ucs2.c
index 09652c5884e..d9f546d435e 100644
--- a/strings/ctype-ucs2.c
+++ b/strings/ctype-ucs2.c
@@ -903,7 +903,8 @@ static void
 my_fill_mb2(CHARSET_INFO *cs __attribute__((unused)),
             char *s, size_t l, int fill)
 {
-  for ( ; l >= 2; s[0]= 0, s[1]= fill, s+= 2, l-= 2);
+  DBUG_ASSERT(fill <= 0xFFFF);
+  for ( ; l >= 2; s[0]= (fill >> 8), s[1]= (fill & 0xFF), s+= 2, l-= 2);
 }
 
 
@@ -1563,98 +1564,6 @@ my_hash_sort_utf16_bin(CHARSET_INFO *cs __attribute__((unused)),
 }
 
 
-/**
-   Calculate min_str and max_str that ranges a LIKE string.
-
-   @param ptr        Pointer to LIKE pattern.
-   @param ptr_length Length of LIKE pattern.
-   @param escape     Escape character in LIKE.  (Normally '\').
-                     All escape characters should be removed
-                     from min_str and max_str.
-   @param res_length Length of min_str and max_str.
-   @param min_str    Smallest case sensitive string that ranges LIKE.
-                     Should be space padded to res_length.
-   @param max_str    Largest case sensitive string that ranges LIKE.
-                     Normally padded with the biggest character sort value.
-
-   @return Optimization status.
-     @retval FALSE if LIKE pattern can be optimized
-     @rerval TRUE if LIKE can't be optimized.
-*/
-
-my_bool
-my_like_range_utf16(CHARSET_INFO *cs,
-                    const char *ptr, size_t ptr_length,
-                    pbool escape, pbool w_one, pbool w_many,
-                    size_t res_length,
-                    char *min_str,char *max_str,
-                    size_t *min_length,size_t *max_length)
-{
-  const char *end=ptr+ptr_length;
-  char *min_org=min_str;
-  char *min_end=min_str+res_length;
-  size_t charlen= res_length / cs->mbmaxlen;
-  
-  for ( ; ptr + 1 < end && min_str + 1 < min_end && charlen > 0
-        ; ptr+=2, charlen--)
-  {
-    if (ptr[0] == '\0' && ptr[1] == escape && ptr + 1 < end)
-    {
-      ptr+=2;                                        /* Skip escape */
-      *min_str++= *max_str++ = ptr[0];
-      *min_str++= *max_str++ = ptr[1];
-      continue;
-    }
-    if (ptr[0] == '\0' && ptr[1] == w_one)        /* '_' in SQL */
-    {
-      *min_str++= (char) (cs->min_sort_char >> 8);
-      *min_str++= (char) (cs->min_sort_char & 255);
-      *max_str++= (char) (cs->max_sort_char >> 8);
-      *max_str++= (char) (cs->max_sort_char & 255);
-      continue;
-    }
-    if (ptr[0] == '\0' && ptr[1] == w_many)        /* '%' in SQL */
-    {
-      /*
-        Calculate length of keys:
-        'a\0\0... is the smallest possible string when we have space expand
-        a\ff\ff... is the biggest possible string
-      */
-      *min_length= ((cs->state & MY_CS_BINSORT) ? (size_t) (min_str - min_org) :
-                    res_length);
-      *max_length= res_length;
-      do {
-        *min_str++ = 0;
-        *min_str++ = 0;
-        *max_str++ = (char) (cs->max_sort_char >> 8);
-        *max_str++ = (char) (cs->max_sort_char & 255);
-      } while (min_str + 1 < min_end);
-      return FALSE;
-    }
-    *min_str++= *max_str++ = ptr[0];
-    *min_str++= *max_str++ = ptr[1];
-  }
-
-  /* Temporary fix for handling w_one at end of string (key compression) */
-  {
-    char *tmp;
-    for (tmp= min_str ; tmp-1 > min_org && tmp[-1] == '\0' && tmp[-2]=='\0';)
-    {
-      *--tmp=' ';
-      *--tmp='\0';
-    }
-  }
-  
-  *min_length= *max_length = (size_t) (min_str - min_org);
-  while (min_str + 1 < min_end)
-  {
-    *min_str++ = *max_str++ = '\0';
-    *min_str++ = *max_str++ = ' ';      /* Because if key compression */
-  }
-  return FALSE;
-}
-
-
 static MY_COLLATION_HANDLER my_collation_utf16_general_ci_handler =
 {
   NULL,                /* init */
@@ -1662,7 +1571,7 @@ static MY_COLLATION_HANDLER my_collation_utf16_general_ci_handler =
   my_strnncollsp_utf16,
   my_strnxfrm_unicode,
   my_strnxfrmlen_simple,
-  my_like_range_utf16,
+  my_like_range_generic,
   my_wildcmp_utf16_ci,
   my_strcasecmp_mb2_or_mb4,
   my_instr_mb,
@@ -1678,7 +1587,7 @@ static MY_COLLATION_HANDLER my_collation_utf16_bin_handler =
   my_strnncollsp_utf16_bin,
   my_strnxfrm_unicode_full_bin,
   my_strnxfrmlen_unicode_full_bin,
-  my_like_range_utf16,
+  my_like_range_generic,
   my_wildcmp_utf16_bin,
   my_strcasecmp_mb2_or_mb4,
   my_instr_mb,
@@ -2551,113 +2460,6 @@ my_strnncollsp_utf32_bin(CHARSET_INFO *cs __attribute__((unused)),
 }
 
 
-/**
-   Calculate min_str and max_str that ranges a LIKE string.
-
-   @param ptr        Pointer to LIKE pattern.
-   @param ptr_length Length of LIKE pattern.
-   @param escape     Escape character in LIKE.  (Normally '\').
-                     All escape characters should be removed
-                     from min_str and max_str.
-   @param res_length Length of min_str and max_str.
-   @param min_str    Smallest case sensitive string that ranges LIKE.
-                     Should be space padded to res_length.
-   @param max_str    Largest case sensitive string that ranges LIKE.
-                     Normally padded with the biggest character sort value.
-
-   @return Optimization status.
-     @retval FALSE if LIKE pattern can be optimized
-     @rerval TRUE if LIKE can't be optimized.
-*/
-
-my_bool
-my_like_range_utf32(CHARSET_INFO *cs,
-                    const char *ptr, size_t ptr_length,
-                    pbool escape, pbool w_one, pbool w_many,
-                    size_t res_length,
-                    char *min_str,char *max_str,
-                    size_t *min_length,size_t *max_length)
-{
-  const char *end= ptr + ptr_length;
-  char *min_org= min_str;
-  char *min_end= min_str + res_length;
-  char *max_end= max_str + res_length;
-  size_t charlen= res_length / cs->mbmaxlen;
-  
-  DBUG_ASSERT((res_length % 4) == 0);
-  
-  for ( ; charlen > 0; ptr+= 4, charlen--)
-  {
-    my_wc_t wc;
-    int res;
-    if ((res= my_utf32_uni(cs, &wc, (uchar*) ptr, (uchar*) end)) < 0)
-    {
-      my_fill_utf32(cs, min_str, min_end - min_str, cs->min_sort_char);
-      my_fill_utf32(cs, max_str, min_end - min_str, cs->max_sort_char);
-      /* min_length and max_legnth are not important */
-      return TRUE;
-    }
-    
-    if (wc == (my_wc_t) escape)
-    {
-      ptr+= 4;                                  /* Skip escape */
-      if ((res= my_utf32_uni(cs, &wc, (uchar*) ptr, (uchar*) end)) < 0)
-      {
-        my_fill_utf32(cs, min_str, min_end - min_str, cs->min_sort_char);
-        my_fill_utf32(cs, max_str, max_end - min_str, cs->max_sort_char);
-        /* min_length and max_length are not important */
-        return TRUE;
-      }
-      if (my_uni_utf32(cs, wc, (uchar*) min_str, (uchar*) min_end) != 4 ||
-          my_uni_utf32(cs, wc, (uchar*) max_str, (uchar*) max_end) != 4)
-        goto pad_set_lengths;
-      *min_str++= 4;
-      *max_str++= 4;
-      continue;
-    }
-    
-    if (wc == (my_wc_t) w_one)
-    {
-      if (my_uni_utf32(cs, cs->min_sort_char, (uchar*) min_str, (uchar*) min_end) != 4 ||
-          my_uni_utf32(cs, cs->max_sort_char, (uchar*) max_str, (uchar*) max_end) != 4)
-        goto pad_set_lengths;
-      min_str+= 4;
-      max_str+= 4;
-      continue;
-    }
-    
-    if (wc == (my_wc_t) w_many)
-    {
-      /*
-        Calculate length of keys:
-        'a\0\0... is the smallest possible string when we have space expand
-        a\ff\ff... is the biggest possible string
-      */
-      *min_length= ((cs->state & MY_CS_BINSORT) ?
-                    (size_t) (min_str - min_org) :
-                    res_length);
-      *max_length= res_length;
-      goto pad_min_max;
-    }
-    
-    /* Normal character */
-    if (my_uni_utf32(cs, wc, (uchar*) min_str, (uchar*) min_end) != 4 ||
-        my_uni_utf32(cs, wc, (uchar*) max_str, (uchar*) max_end) != 4)
-      goto pad_set_lengths;
-    min_str+= 4;
-    max_str+= 4;
-  }
-
-pad_set_lengths:
-  *min_length= *max_length= (size_t) (min_str - min_org);
-
-pad_min_max:
-  my_fill_utf32(cs, min_str, min_end - min_str, cs->min_sort_char);
-  my_fill_utf32(cs, max_str, max_end - max_str, cs->max_sort_char);
-  return FALSE;
-}
-
-
 static size_t
 my_scan_utf32(CHARSET_INFO *cs,
               const char *str, const char *end, int sequence_type)
@@ -2689,7 +2491,7 @@ static MY_COLLATION_HANDLER my_collation_utf32_general_ci_handler =
   my_strnncollsp_utf32,
   my_strnxfrm_unicode,
   my_strnxfrmlen_utf32,
-  my_like_range_utf32,
+  my_like_range_generic,
   my_wildcmp_utf32_ci,
   my_strcasecmp_mb2_or_mb4,
   my_instr_mb,
@@ -2705,7 +2507,7 @@ static MY_COLLATION_HANDLER my_collation_utf32_bin_handler =
   my_strnncollsp_utf32_bin,
   my_strnxfrm_unicode_full_bin,
   my_strnxfrmlen_unicode_full_bin,
-  my_like_range_utf32,
+  my_like_range_generic,
   my_wildcmp_utf32_bin,
   my_strcasecmp_mb2_or_mb4,
   my_instr_mb,
@@ -3252,120 +3054,6 @@ void my_hash_sort_ucs2_bin(CHARSET_INFO *cs __attribute__((unused)),
   }
 }
 
-/*
-** Calculate min_str and max_str that ranges a LIKE string.
-** Arguments:
-** ptr		Pointer to LIKE string.
-** ptr_length	Length of LIKE string.
-** escape	Escape character in LIKE.  (Normally '\').
-**		All escape characters should be removed from min_str and max_str
-** res_length	Length of min_str and max_str.
-** min_str	Smallest case sensitive string that ranges LIKE.
-**		Should be space padded to res_length.
-** max_str	Largest case sensitive string that ranges LIKE.
-**		Normally padded with the biggest character sort value.
-**
-** The function should return 0 if ok and 1 if the LIKE string can't be
-** optimized !
-*/
-
-my_bool my_like_range_ucs2(CHARSET_INFO *cs,
-			   const char *ptr, size_t ptr_length,
-			   pbool escape, pbool w_one, pbool w_many,
-			   size_t res_length,
-			   char *min_str,char *max_str,
-			   size_t *min_length,size_t *max_length)
-{
-  const char *end=ptr+ptr_length;
-  char *min_org=min_str;
-  char *min_end=min_str+res_length;
-  size_t charlen= res_length / cs->mbmaxlen;
-  const char *contraction_flags= cs->contractions ?
-             ((const char*) cs->contractions) + 0x40*0x40 : NULL;
-  
-  for ( ; ptr + 1 < end && min_str + 1 < min_end && charlen > 0
-        ; ptr+=2, charlen--)
-  {
-    if (ptr[0] == '\0' && ptr[1] == escape && ptr + 1 < end)
-    {
-      ptr+=2;					/* Skip escape */
-      *min_str++= *max_str++ = ptr[0];
-      *min_str++= *max_str++ = ptr[1];
-      continue;
-    }
-    if (ptr[0] == '\0' && ptr[1] == w_one)	/* '_' in SQL */
-    {
-      *min_str++= (char) (cs->min_sort_char >> 8);
-      *min_str++= (char) (cs->min_sort_char & 255);
-      *max_str++= (char) (cs->max_sort_char >> 8);
-      *max_str++= (char) (cs->max_sort_char & 255);
-      continue;
-    }
-    if (ptr[0] == '\0' && ptr[1] == w_many)	/* '%' in SQL */
-    {
-fill_max_and_min:
-      /*
-        Calculate length of keys:
-        'a\0\0... is the smallest possible string when we have space expand
-        a\ff\ff... is the biggest possible string
-      */
-      *min_length= ((cs->state & MY_CS_BINSORT) ? (size_t) (min_str - min_org) :
-                    res_length);
-      *max_length= res_length;
-      do {
-        *min_str++ = 0;
-	*min_str++ = 0;
-	*max_str++ = (char) (cs->max_sort_char >> 8);
-	*max_str++ = (char) (cs->max_sort_char & 255);
-      } while (min_str + 1 < min_end);
-      return 0;
-    }
-
-    if (contraction_flags && ptr + 3 < end &&
-        ptr[0] == '\0' && contraction_flags[(uchar) ptr[1]])
-    {
-      /* Contraction head found */
-      if (ptr[2] == '\0' && (ptr[3] == w_one || ptr[3] == w_many))
-      {
-        /* Contraction head followed by a wildcard, quit */
-        goto fill_max_and_min;
-      }
-      
-      /*
-        Check if the second letter can be contraction part,
-        and if two letters really produce a contraction.
-      */
-      if (ptr[2] == '\0' && contraction_flags[(uchar) ptr[3]] &&
-          cs->contractions[(ptr[1]-0x40)*0x40 + ptr[3] - 0x40])
-      {
-        /* Contraction found */
-        if (charlen == 1 || min_str + 2 >= min_end)
-        {
-          /* Full contraction doesn't fit, quit */
-          goto fill_max_and_min;
-        }
-        
-        /* Put contraction head */
-        *min_str++= *max_str++= *ptr++;
-        *min_str++= *max_str++= *ptr++;
-        charlen--;
-      }
-    }
-    /* Put contraction tail, or a single character */
-    *min_str++= *max_str++ = ptr[0];
-    *min_str++= *max_str++ = ptr[1];
-  }
-
-  *min_length= *max_length = (size_t) (min_str - min_org);
-  while (min_str + 1 < min_end)
-  {
-    *min_str++ = *max_str++ = '\0';
-    *min_str++ = *max_str++ = ' ';      /* Because if key compression */
-  }
-  return 0;
-}
-
-
 
 static MY_COLLATION_HANDLER my_collation_ucs2_general_ci_handler =
 {
@@ -3374,7 +3062,7 @@ static MY_COLLATION_HANDLER my_collation_ucs2_general_ci_handler =
     my_strnncollsp_ucs2,
     my_strnxfrm_unicode,
     my_strnxfrmlen_simple,
-    my_like_range_ucs2,
+    my_like_range_generic,
     my_wildcmp_ucs2_ci,
     my_strcasecmp_mb2_or_mb4,
     my_instr_mb,
@@ -3390,7 +3078,7 @@ static MY_COLLATION_HANDLER my_collation_ucs2_bin_handler =
     my_strnncollsp_ucs2_bin,
     my_strnxfrm_unicode,
     my_strnxfrmlen_simple,
-    my_like_range_ucs2,
+    my_like_range_generic,
     my_wildcmp_ucs2_bin,
     my_strcasecmp_mb2_or_mb4,
     my_instr_mb,