presto-base-jdbc/src/main/java/io/prestosql/plugin/jdbc/ForwardingJdbcClient.java/ForwardingJdbcClient/addColumn
class ForwardingJdbcClient:    @Override
    public void addColumn(ConnectorSession session, JdbcTableHandle handle, ColumnMetadata column)
    {
        getDelegate().addColumn(session, handle, column);
    }