da...@andl.org wrote:
> I am attempting to create a new language implementation. The language is Andl 
> (andl.org), so the
> handler is plandl.
> This is a question about executing SPI queries from inside plandl.
> 
> The documentation makes it clear that SPI allows nested queries; that in some 
> instances it will be
> necessary to call SPI_push() and SPI_pop(), but in others this will be 
> handled automatically. Se
> http://www.postgresql.org/docs/9.5/interactive/spi-spi-push.html.
> 
> It is an important design feature of plandl to allow nested queries.
> 
> My question is: where are the transaction boundaries if the inner/outer query 
> do or do not contain
> BEGIN/ABORT/COMMIT? Do they nest, or does an inner COMMIT finish a 
> transaction started by an outer
> BEGIN, or is it ignored?

You cannot have BEGIN or COMMIT inside a function.

Yours,
Laurenz Albe

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