Seems like a good reason to introduce a way to query the existence of a 
particular pragma command, something like:
PRAGMA exists('user_version');
or
PRAGMA exists='user_version';
--
Marco Bambini
http://www.sqlabs.com
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> On 6 Apr 2017, at 13:42, Richard Hipp <[email protected]> wrote:
> 
> On Thu, 06 Apr 2017 12:11 +0100, Tim Streater <[email protected]> wrote:
>> 
>> I keep reading that the continued
>> existence of any particular PRAGMA is completely un-guaranteed.
>> 
> 
> We say that.  But in practice, if we were to remove a pragma it would
> break thousands, perhaps millions, of applications, so they are all
> there for the long haul.  Especially "PRAGMA user_version" you can
> count on being there.
> -- 
> D. Richard Hipp
> [email protected]
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