Custom Extension

<Biml xmlns="http://schemas.varigence.com/biml.xsd">
    <Tables>
        <!-- Custom Extensions are custom SSIS tasks which can run after table creation -->
        <Table Name="SampleChild" ConnectionName="TableConnection">
            <Columns>
                <Column Name="Column1" DataType="Int32"/>
            </Columns>
            <CustomExtensions>
                <CustomExtension Name="CustomExtension" ConstraintMode="Linear">
                    <Tasks>
                        <ExecuteSQL Name="SimpleTask" ConnectionName="TableConnection">
                            <DirectInput>
                                ALTER TABLE SampleChild ADD Column2 BIGINT NULL
                            </DirectInput>
                        </ExecuteSQL>
                    </Tasks>
                </CustomExtension>
            </CustomExtensions>
        </Table> 
    </Tables>
</Biml>