OK, so the online documentation is wrong.
https://docs.4d.com/4Dv17/4D/17.2/Preemptive-4D-processes.300-4386982.en.html
Thanks.
> Date: Tue, 6 Aug 2019 18:02:54 +0000
> From: Timothy Penner <[email protected] <mailto:[email protected]>>
> Hi Richard,
>
> Beginning with 4D v17 R4, Begin SQL, End SQL, and the associated SQL
> statements used with an internal database are now preemptive compliant.
> https://blog.4d.com/begin-end-sql-in-preemptive-mode/
> <https://blog.4d.com/begin-end-sql-in-preemptive-mode/>
>
> -Tim
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