Postgres 14

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Help with an interesting Postgres question: Why isn't an Index Only Scan used on a partition accessed via the parent table?.

ERROR:  operator does not exist: jsonb - jsonb
LINE 4: select new - old
                   ^
HINT:  No operator matches the given name and argument types. You might need to add explicit type casts.

?column?
"name"=>"bar"

SELECT 1