Re: Repeatable Read Isolation Level "transaction start time"

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От Greg Sabino Mullane
Тема Re: Repeatable Read Isolation Level "transaction start time"
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Msg-id CAKAnmmLt2ezcf7-LgJkO_oeqK+Ei+XB6F3pHk2mnyadRq3corQ@mail.gmail.com
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Ответ на Re: Repeatable Read Isolation Level "transaction start time"  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: Repeatable Read Isolation Level "transaction start time"
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On Tue, Sep 24, 2024 at 10:28 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
It's even looser than that, really: it's the first statement that
requires an MVCC snapshot.

Hm....so why does "SELECT 1;" work as a transaction start marker then, as opposed to "SHOW work_mem;", which does not? Do we simply consider anything with a SELECT as needing a snapshot?

Cheers,
Greg

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