source-*-batch: No longer run discovery during Validate #1298
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Description:
I have reason to believe that running discovery is causing publication failures for at least one user whose database has a lot of stuff in it, and there's no strong need to run the full discovery process as part of validation -- it was just an easy-to-implement way of getting a bunch of sanity checking done all at once.
So the call to
Discover()
is removed, in favor of merely parsing the config and connecting to the database. The database connect function has been modified in each connector so that it now runs a no-opSELECT true;
query, to make sure that we don't introduce some sort of subtle failure mode where validation passes but the user doesn't actually have the ability to execute queries at all.This change is