[development] Debugging updates

[Gábor Hojtsy]

On 10/19/07, Karen Stevenson <karen at elderweb.com> wrote:
> Does anyone have ideas for ways to debug update functions in the install file figure out what's going on when they don't work as expected or when I get reports of problems?
>
> Is there any way to see the query logs that the devel module creates from within updates? If I use update_sql() I can tell what queries ran, but there are times when I need to use db_query() instead and I can get no clue to what is going on when that runs. And I can't find any way to display messages back to myself or see results of print_r() or any of the other things I do elsewhere to debug scripts.
>
> I've tried to execute the update() script directly from within a normal page, but that won't work either.

Depending on the project and version you need to debug your updates
between, you might be able to use watchdog() to log data and then
inspect your logs.

Gabor