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Check criticalSharedRelcachesBuilt in GetSharedSecurityLabel().
An extension may want to call GetSecurityLabel() on a shared object before the shared relcaches are fully initialized. For instance, a ClientAuthentication_hook might want to retrieve the security label on a role. Discussion: https://postgr.es/m/ecb7af0b26e3be1d96d291c8453a86f1f82d9061.camel@j-davis.com Backpatch-through: 9.6
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@ -169,8 +169,8 @@ GetSharedSecurityLabel(const ObjectAddress *object, const char *provider)
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pg_shseclabel = heap_open(SharedSecLabelRelationId, AccessShareLock);
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scan = systable_beginscan(pg_shseclabel, SharedSecLabelObjectIndexId, true,
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NULL, 3, keys);
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scan = systable_beginscan(pg_shseclabel, SharedSecLabelObjectIndexId,
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criticalSharedRelcachesBuilt, NULL, 3, keys);
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tuple = systable_getnext(scan);
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if (HeapTupleIsValid(tuple))
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