Having Multiple Setup Resources Under SQL Folder

Question

Is it appropriate if maintaining the structure of setup resources folder structure as below ?

MyModule > Helper
           sql    > mymodule_customer_setup
                  > mymodule_directory_setup
                  > mymodule_setup

If above structure is fine, then how should I define in the config.xml? I am thinking to define like below:

<resources>
    <mymodule_customer_setup>
        <setup>
            <module>Package_MyModule</module>
        </setup>
    </mymodule_customer_setup>
    <mymodule_directory_setup>
        <setup>
            <module>Package_MyModule</module>
        </setup>
    </mymodule_directory_setup>
    <mymodule_setup>
        <setup>
            <module>Package_MyModule</module>
        </setup>
    </mymodule_setup>
</resources>

Answer 1

So let's step through what actually happens here.

Install scripts for all.

I created update scripts for all three resources and then in the core_resource table you get the following information.

+--------------------------+---------+--------------+
| code                     | version | data_version |
+--------------------------+---------+--------------+
| mymodule_customer_setup  | 0.7.0   | 0.7.0        |
| mymodule_directory_setup | 0.7.0   | 0.7.0        |
| mymodule_setup           | 0.7.0   | 0.7.0        |
+--------------------------+---------+--------------+

Updates for one script

I then update the version id of the config but include only one update script.

+--------------------------+---------+--------------+
| code                     | version | data_version |
+--------------------------+---------+--------------+
| mymodule_customer_setup  | 0.7.1   | 0.7.1        |
| mymodule_directory_setup | 0.7.1   | 0.7.1        |
| mymodule_setup           | 0.7.1   | 0.7.1        |
+--------------------------+---------+--------------+

So sadly as expected all the resources get updated at the same time even with only the one script :(

Technically there is nothing wrong with this approach, I have tested it and each script does get called but all version numbers get updated at the same time. It might look a bit odd having "missing" scripts in your directories but you could always put empty scripts there that simply start and end setup so as to keep the order.