[t:4635] ::truncate_dictionary should keep the old row type

git-svn-id: file:///svn/mysql/tokudb-engine/tokudb-engine@41540 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/ha_tokudb.cc

@@ -8044,6 +8044,7 @@ int ha_tokudb::truncate_dictionary( uint keynr, DB_TXN* txn ) {
     int error;
     bool is_pk = (keynr == primary_key);
 
+    enum row_type type = get_row_type();
     error = share->key_file[keynr]->close(share->key_file[keynr], 0);
     assert(error == 0);
 
@@ -8073,6 +8074,8 @@ int ha_tokudb::truncate_dictionary( uint keynr, DB_TXN* txn ) {
         if (error) { goto cleanup; }
     }
 
+    table->s->row_type = type; // ensure newly created dictionary has the original compression type
+
     if (is_pk) {
         error = create_main_dictionary(share->table_name, table, txn, &share->kc_info);
     }