Moreover if I make field LIKE 'AA%' and I use INDEXED BY index_on_field
shell return me "Error: no query solution"
so it's seams sqlite with LIKE operator can't use index on field
Selea s.r.l.
Michele Pradella R&D
SELEA s.r.l.
Via Aldo Moro 69
Italy - 46019 Cicognara (MN)
Tel +39 0375 889091
Fax +39 0375 889080
*michele.pradella at selea.com* <mailto:michele.pradella at selea.com>
*http://www.selea.com*
Il 12/02/2016 11.39, Michele Pradella ha scritto:
> Ok understood...anyway trying with sqlite shell it's seams that (filed
> LIKE 'AA%') is slower than (field>='AAA' AND field<='AAZ')
> do you think there's a way I can check if the optimization is working?
>
> Selea s.r.l.
>
>
> Michele Pradella R&D
>
>
> SELEA s.r.l.
>
> Via Aldo Moro 69
> Italy - 46019 Cicognara (MN)
> Tel +39 0375 889091
> Fax +39 0375 889080
> *michele.pradella at selea.com* <mailto:michele.pradella at selea.com>
> *http://www.selea.com*
> Il 12/02/2016 11.23, Simon Slavin ha scritto:
>> On 12 Feb 2016, at 10:14am, Michele Pradella
>> <michele.pradella at selea.com> wrote:
>>
>>> I can make the query:
>>> SELECT field FROM car_plates WHERE
>>> (field>='EX011A')AND(field<='EX011Z');
>>> now I can use the index the query is faster.
>> SQLite makes this optimization for you. See section 4.0 of
>>
>> <https://www.sqlite.org/optoverview.html>
>>
>> Simon.
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>
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