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In v19, pg_stat_autovacuum_scores computes a TOAST table's scores from its own storage parameters alone. On the other hand, autovacuum falls back to the main table's parameters when the TOAST table has none. This means that the view may report scores that don't match what autovacuum would calculate. This contradicts the documented promise that the view generates its results the same way autovacuum workers do. To fix, teach the view to do the same fallback. As in do_autovacuum(), we must make a preliminary pass over pg_class to collect the main tables' parameters, since the pg_class scan may see TOAST tables before their main tables. Commitfad70a09fffor v20 improved autovacuum's handling of TOAST storage parameters and adjusted the view to match, but it was deemed too intrusive to back-patch. This fix is for v19 only. Oversight in commit87f61f0c82. Reported-by: Masahiko Sawada <sawada.mshk@gmail.com> Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com> Discussion: https://postgr.es/m/CAD21AoB1CJRVfCDh8qYuD3eueiygXxk7F3nybgjN0RZXSD-QUw%40mail.gmail.com Backpatch-through: 19 only