BUG#13835: max key length is 1000 bytes when trying to create a fulltext index

Allow fulltext index on VARCHAR columns longer than max key length.

mysql-test/r/fulltext.result

@@ -437,3 +437,11 @@ SELECT a FROM t1 WHERE MATCH a AGAINST('testword\'\'' IN BOOLEAN MODE);
 a
 testword''
 DROP TABLE t1;
+CREATE TABLE t1 (a VARCHAR(10000), FULLTEXT(a));
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(10000) default NULL,
+  FULLTEXT KEY `a` (`a`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1;

mysql-test/t/fulltext.test

@@ -357,4 +357,12 @@ SELECT a FROM t1 WHERE MATCH a AGAINST('testword' IN BOOLEAN MODE);
 SELECT a FROM t1 WHERE MATCH a AGAINST('testword\'\'' IN BOOLEAN MODE);
 DROP TABLE t1;
 
+#
+# BUG#13835: max key length is 1000 bytes when trying to create
+#            a fulltext index
+#
+CREATE TABLE t1 (a VARCHAR(10000), FULLTEXT(a));
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
 # End of 4.1 tests

sql/sql_table.cc

@@ -1296,7 +1296,7 @@ static int mysql_prepare_table(THD *thd, HA_CREATE_INFO *create_info,
 	my_error(ER_WRONG_KEY_COLUMN, MYF(0), column->field_name);
 	  DBUG_RETURN(-1);
       }
-      if (length > file->max_key_part_length())
+      if (length > file->max_key_part_length() && key->type != Key::FULLTEXT)
       {
 	length=file->max_key_part_length();
 	if (key->type == Key::MULTIPLE)