WL#3700: Handler API change: all index search methods - that is,

index_read(), index_read_idx(), index_read_last(), and
records_in_range() - instead of 'uint keylen' argument take
'ulonglong keypart_map', a bitmap showing which keyparts are
present in the key value.
Fallback method is provided for handlers that are lagging behind.

sql/sql_insert.cc

@@ -1165,9 +1165,7 @@ int write_record(THD *thd, TABLE *table,COPY_INFO *info)
 	}
 	key_copy((byte*) key,table->record[0],table->key_info+key_nr,0);
 	if ((error=(table->file->index_read_idx(table->record[1],key_nr,
-						(byte*) key,
-						table->key_info[key_nr].
-						key_length,
+						(byte*) key, ~ULL(0),
 						HA_READ_KEY_EXACT))))
 	  goto err;
       }