Question about savepoint level?

From: Japin Li <japinli(at)hotmail(dot)com>
To: "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Question about savepoint level?
Date: 2022-10-24 04:19:25
Message-ID: MEYP282MB1669B4B342EB629A9FC9F3DBB62E9@MEYP282MB1669.AUSP282.PROD.OUTLOOK.COM
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Hi, hackers

The TransactionStateData has savepointLevel field, however, I do not understand
what is savepoint level, it seems all savepoints have the same savepointLevel,
I want to know how the savepoint level changes.

--
Regrads,
Japin Li.
ChengDu WenWu Information Technology Co.,Ltd.

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