ManPau said...Hello Tim,
is there a way to disable the automtic creation of column group statistics?
There is a patch that back-ports the new control parameters from 12.2 to 12.1, which allows you to prevent them. Alternatively, set the equivalent underscore parameters. See:
@sqlchaser said...Great write up Tim (as always). Kind of shocking to me that this solution changes your metadata/data definition to make things faster. I've seen this cause myriad issues for schema upgrades. I suppose it is arguable that the relationship should have been defined for Oracle ahead of time...
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