I want to create a custom table in avuser schema for storing the user data.
Can any upgrades wipe out this table or cause any other issues.
As far as I know upgrades don't affect custom tables. However, some pseudo-official statement would be also welcome.
Agree with Zoltan.
I'm pretty sure that DB export cover also the custom tables.
Having said that:
Tested by upgraded from 6.9.1 to 7.0.2. Custom Table was intact.
Retrieving data ...