make SEARCH_PREFIX to work with complex (use_coll) charsets, namely latin1_de

myisam/mi_search.c

@@ -659,7 +659,8 @@ int _mi_compare_text(CHARSET_INFO *charset_info, uchar *a, uint a_length,
 #ifdef USE_STRCOLL
   if (use_strcoll(charset_info))
   {
-    /* QQ: This needs to work with part keys at some point */
+    if (part_key && b_length < a_length)
+      a_length=b_length;
     return my_strnncoll(charset_info, a, a_length, b, b_length);
   }
   else

mysql-test/r/ctype_latin1_de.result

@@ -192,7 +192,7 @@ strcmp('
 select strcmp('u','a'),strcmp('u','');
 strcmp('u','a')	strcmp('u','')
 1	1
-create table t1 (a varchar(10), key(a));
+create table t1 (a varchar(10), key(a), fulltext (a));
 insert into t1 values ("a"),("abc"),("abcd"),("hello"),("test");
 select * from t1 where a like "abc%";
 a
@@ -204,4 +204,7 @@ test
 select * from t1 where a like "te_t";
 a
 test
+select * from t1 where match a against ("te*" in boolean mode)+0;
+a
+test
 drop table t1;

mysql-test/t/ctype_latin1_de.test

@@ -38,9 +38,10 @@ select strcmp('u','
 # Some other simple tests with the current character set
 #
 
-create table t1 (a varchar(10), key(a));
+create table t1 (a varchar(10), key(a), fulltext (a));
 insert into t1 values ("a"),("abc"),("abcd"),("hello"),("test");
 select * from t1 where a like "abc%"; 
 select * from t1 where a like "test%"; 
 select * from t1 where a like "te_t"; 
+select * from t1 where match a against ("te*" in boolean mode)+0;
 drop table t1;