Lifetime of commit timestamps

From: Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>
To: pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Lifetime of commit timestamps
Date: 2018-06-22 08:21:32
Message-ID: 20180622.172132.230342845.horiguchi.kyotaro@lab.ntt.co.jp
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Hello.

I don't find any description in the documentation about the
guaranteed lifetime of commit timestamps. I think they are
preserved until corresponding xid goes beyond the freeze horizen,
even though they are actually preserved longer for several
reasons.

If it is not, I think such description is required in
pg_xact_commit_timestamp().

regards.

--
Kyotaro Horiguchi
NTT Open Source Software Center

Attachment Content-Type Size
commit_ts_lifetime_doc_v0.patch text/x-patch 712 bytes

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