[6.x] Fix pg_constraint oid duplication (#8166) #8167
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Multiple of our invested constraints were being given the same oid which caused problems. One specific problem was generating bogus pgdumps, which annoyingly mostly only showed up in inplace-upgrade tests: https://github.com/edgedb/edgedb/actions/runs/12442350513/job/34740389082?pr=8159 The problem was that pg_get_constraintdef was returning a constraint definition for the "wrong" object; the defining query would return 3 rows, and postgres silently returns the first. Fix this by adding some bits to the oid separate from the uuid of the link, and test that the fix works by putting the body of pg_get_constraintdef into a subquery. This hopefully will unblock #8159.
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Multiple of our invested constraints were being given the same oid
which caused problems.
One specific problem was generating bogus pgdumps, which annoyingly
mostly only showed up in inplace-upgrade tests:
https://github.com/edgedb/edgedb/actions/runs/12442350513/job/34740389082?pr=8159
The problem was that pg_get_constraintdef was returning a constraint
definition for the "wrong" object; the defining query would return 3
rows, and postgres silently returns the first.
Fix this by adding some bits to the oid separate from the uuid of the
link, and test that the fix works by putting the body of
pg_get_constraintdef into a subquery.
This hopefully will unblock #8159.