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483d26930b
There are a number of bugs in this area. Two of them are fixed here, namely: 1. get_relation_idx_constraint_oid does not restrict the type of constraint that's returned, so with sufficient bad luck it can return the OID of a foreign key constraint. This has the effect that a primary key in a partition can end up as a child of a foreign key, which makes no sense (it needs to be the child of the equivalent primary key.) Change the API contract so that only index-backed constraints are returned, mimicking get_constraint_index(). 2. Both CloneFkReferenced and CloneFkReferencing clone a self-referencing foreign key, so the partition ends up with a duplicate foreign key. Change the former function to ignore such constraints. Add some tests to verify that things are better now. (However, these new tests show some additional misbehavior that will be fixed later -- namely that there's a constraint marked NOT VALID.) Backpatch to 12, where these constraints are possible at all. Author: Jehan-Guillaume de Rorthais <jgdr@dalibo.com> Discussion: https://postgr.es/m/20220603154232.1715b14c@karst |
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