Where are the detoast function called in select * from table_name case?

From: Rui Hai Jiang <ruihaijiang(at)msn(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Where are the detoast function called in select * from table_name case?
Date: 2015-05-06 13:00:06
Message-ID: BLU436-SMTP158608B068424F10E23CC16A0D00@phx.gbl
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Hello,

I've been reading the PostgreSQL code for weeks to figure out how TOAST
works.
I couldn't find where are the TOAST function called to detoast a tuple
comes from a select query, for example, select * from table_name.
Does anyone know this? Can you give me some help? And any help would
save me a lot of time.

Thanks,
Rui Hai

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