addresses #973

just unpacking key has problems when the key is a substring of a column. MySQL still reports that it is a covering index, must back out previous change

git-svn-id: file:///svn/mysql/tokudb-engine/src@4782 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/ha_tokudb.cc

@@ -2331,12 +2331,7 @@ int ha_tokudb::read_row(int error, uchar * buf, uint keynr, DBT * row, DBT * fou
         unpack_row(buf, &current_row, &key);
     }
     else {
-        if (key_read && !hidden_primary_key) {
-            unpack_key(buf, found_key, keynr);
-        }
-        else {
-            unpack_row(buf, row, found_key);
-        }
+        unpack_row(buf, row, found_key);
     }
     if (found_key) { DBUG_DUMP("read row key", (uchar *) found_key->data, found_key->size); }
     TOKUDB_DBUG_RETURN(0);