Postgres 13

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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?.

SELECT ROW(1,'Hello',false)

row

(1,Hello,f)

SELECT 1

select (ROW(1,'Hello',false)).f1

f1

1

SELECT 1

select (ROW(1,'Hello',false)).f2

ERROR:  failed to find conversion function from unknown to text

select (ROW(1,'Hello'::text,false)).f2

f2

Hello

SELECT 1

select (ROW(1,'Hello',false)).f3

f3

f

SELECT 1

-- https://dba.stackexchange.com/questions/273559/how-to-extract-fields-of-anonymous-row-type-in-postgresql