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List:       postgresql-hackers
Subject:    Re: SPI isolation changes
From:       Tom Lane <tgl () sss ! pgh ! pa ! us>
Date:       2023-06-30 16:47:10
Message-ID: 1770512.1688143630 () sss ! pgh ! pa ! us
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Seino Yuki <seinoyu@oss.nttdata.com> writes:
> Of course, executing SET TRANSACTION ISOLATION LEVEL with SPI_execute 
> will result in error.
> ---
> SPI_execute("SET TRANSACTION ISOLATION LEVEL SERIALIZABLE", false, 0);

> (Log Output)
> ERROR:  SET TRANSACTION ISOLATION LEVEL must be called before any query
> CONTEXT:  SQL statement "SET TRANSACTION ISOLATION LEVEL SERIALIZABLE"

Even if you just did SPI_commit?  That *should* fail if you just do
it right off the bat in a SPI-using procedure, because you're already
within the transaction that called the procedure.  But I think it
will work if you do SPI_commit followed by this SPI_execute.

			regards, tom lane


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