On 4 Jan 2017, at 12:09am, Bart Smissaert <[email protected]> wrote:

> Secondly, can the Explain statement tell me that indeed the UDF runs 100000
> times in the first SQL and only once for the second SQL?

What makes you think that this is the case ?  Why would SQLite not be running 
the UDF 100000 times in both cases ?

Did you build any caching of results into your UDF ?  If not, then SQLite has 
no idea it can optimize it by checking to see if it’s using the same parameters 
each time.

Simon.
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