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IMHO bad practice is:
- providing system tables without needed indexes
- reading tables in "arrival sequence" (whatever this might be meaning) - its even worse for system tables (or other foreign tables), reuse deleted records could change, or indexes could be added by the owner of the tables.
adding views and indexes to system tables isn't best practice, but if needed indexes are not provided by system it might be some kind of self-defense.

D*B

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