Fix for BUG#8560: Set max_sort_char for any 8-bit charset with binary...

Fix for BUG#8560: Set max_sort_char for any 8-bit charset with binary collation. max_sort_char is needed by
my_like_range_simple to produce upper bound constants for LIKE "str_%" and similar expressions.

mysql-test/r/ctype_cp1251.result

@@ -54,3 +54,19 @@ select collation(a), collation(b), collation(binary 'ccc') from t1 limit 1;
 collation(a)	collation(b)	collation(binary 'ccc')
 cp1251_bin	binary	binary
 drop table t1;
+create table t1 (
+a varchar(16) character set cp1251 collate cp1251_bin not null,
+b int(10) default null,
+primary key(a)
+) charset=cp1251;
+insert into t1 (a) values ('air'),
+('we'),('g'),('we_toshko'), ('s0urce'),('we_ivo'),('we_iliyan'),
+('we_martin'),('vw_grado'),('vw_vasko'),('tn_vili'),('tn_kalina'),
+('tn_fakira'),('vw_silvia'),('vw_starshi'),('vw_geo'),('vw_b0x1');
+select * from t1 where a like 'we_%';
+a	b
+we_iliyan	NULL
+we_ivo	NULL
+we_martin	NULL
+we_toshko	NULL
+drop table t1;

mysql-test/t/ctype_cp1251.test

@@ -32,3 +32,17 @@ select * from t1 where lower(b)='bbb';
 select charset(a), charset(b), charset(binary 'ccc') from t1 limit 1;
 select collation(a), collation(b), collation(binary 'ccc') from t1 limit 1;
 drop table t1;
+
+# Test for BUG#8560
+create table t1 (
+ a varchar(16) character set cp1251 collate cp1251_bin not null,
+ b int(10) default null,
+ primary key(a)
+) charset=cp1251;
+insert into t1 (a) values ('air'),
+  ('we'),('g'),('we_toshko'), ('s0urce'),('we_ivo'),('we_iliyan'),
+  ('we_martin'),('vw_grado'),('vw_vasko'),('tn_vili'),('tn_kalina'),
+  ('tn_fakira'),('vw_silvia'),('vw_starshi'),('vw_geo'),('vw_b0x1');
+
+select * from t1 where a like 'we_%';
+drop table t1;

strings/ctype-bin.c

@@ -67,6 +67,13 @@ static uchar bin_char_array[] =
 };
 
 
+static my_bool 
+my_coll_init_8bit_bin(CHARSET_INFO *cs,
+                      void *(*alloc)(uint) __attribute__((unused)))
+{
+  cs->max_sort_char=255; 
+  return FALSE;
+}
 
 static int my_strnncoll_binary(CHARSET_INFO * cs __attribute__((unused)),
                                const uchar *s, uint slen,
@@ -428,7 +435,7 @@ uint my_instr_bin(CHARSET_INFO *cs __attribute__((unused)),
 
 MY_COLLATION_HANDLER my_collation_8bit_bin_handler =
 {
-    NULL,			/* init */
+    my_coll_init_8bit_bin,
     my_strnncoll_8bit_bin,
     my_strnncollsp_8bit_bin,
     my_strnxfrm_8bit_bin,