[development] how to run new .install on installed module

[andrew morton]

On Fri, Jan 9, 2009 at 12:51 AM, Tomáš Fülöpp <tjfulopp at gmail.com> wrote:
> Hi,
>
> Probably a simple problem but I don't find solution on d.o.
>
> I have a D6 contrib module that did not use database before, but now it
> does. The problem is that even though a .install file has been added, the
> database is not created in case the older version of the module is enabled
> already, not even after running /update.php.
>
> http://drupal.org/node/323314 explains that ".install file is run the first
> time a module is enabled" -- but how to make sure the initial database is
> installed on an existing module? Is the only solution to solve it via
> hook_update_N, detecting whether the table exists, and installing it -- even
> though in fact we are installing, not updating?

If you're addin a database to an existing module then you need to
define it in hook_install() for new sites and also in hook_update_N()
for sites that have already installed. If you think that they might
have the table installed for some reason then by all means call
db_table_exists() and check first. Also be aware that implementations
of hook_update_N() should *not* call hook_schema(). You need to have a
copy of the schema in the update function.

andrew