Обсуждение: Run a transaction block through SPI_execute

When I try to run a transaction block (similar) to below through SPI_execute:
BEGIN; set transaction read write; ....; COMMIT

I get an error: SPI_ERROR_TRANSACTION.

I see that SPI interface does not support transaction manipulation commands.

Documentation:  https://www.postgresql.org/docs/current/spi-spi-execute.html

Can you please suggest me how to achieve run the above transaction
block using SPI_ interface?

Transaction management support only SPI_commit/SPI_rollback.
I'm more interested in setting `set transaction read write;` through
SPI interface.


Thanks,
Mahendrakar.

mahendrakar s <mahendrakarforpg@gmail.com> writes:
> When I try to run a transaction block (similar) to below through SPI_execute:
> BEGIN; set transaction read write; ....; COMMIT
> I get an error: SPI_ERROR_TRANSACTION.
> I see that SPI interface does not support transaction manipulation commands.

Yup; you can't execute begin/commit that way.

> Transaction management support only SPI_commit/SPI_rollback.
> I'm more interested in setting `set transaction read write;` through
> SPI interface.

You could look at how plpgsql handles it.  I think though that as
long as you do BEGIN and COMMIT in the approved way, you can feed
the SET through SPI_execute or one of its siblings.

            regards, tom lane