Re: EXISTS variants

the attached csv describes the nature of the 566 exists variants present in
the wikidata sparql queries.
the "operators" column exclude the exists operator itself, counts one for
each bgp, one for each for each statement pattern and one join for each
pair of statement patterns.



On Thu, 10 Jul 2025 at 18:37, James Anderson <anderson.james.1955@gmail.com>
wrote:

> as a furter excursion in this direction, i applied a revised version of
> the extraction process to the archived wikidata queries.
> these, as described by the ICCL Wikidata query archive
>
>     https://iccl.inf.tu-dresden.de/web/Wikidata_SPARQL_Logs/en
>
> there were a total of 1,310,678,852 SPARQL queries, of which 626,080
> included exists operators.
> the attached graph depicts the operator count distribution
>
>
>
> On Tue, 24 Jun 2025 at 10:02, James Anderson <
> anderson.james.1955@gmail.com> wrote:
>
>> good morning;
>>
>> one of the topics last week was the possible variations evident in how
>> authors use the exists operator.
>>
>> in order to provide some information, i looked at the queries recorded
>> for several sites to which i have access.
>> the variants and the nodejs script to extract the data are present in a
>> fork of the SPARQL-exists github repository.
>>
>>     https://github.com/datagraph/SPARQL-exists/tree/main/test-tools.
>>
>> the top directory contains the .mjs script.
>> the query-statistics directory includes the results from individual hosts
>> and an aggregate csv file.
>>
>> the queries have been anonymized to hide restricted information and to
>> make the resemblances stand out.
>> the analysis is context-free.
>>
>> best regards, from berlin,
>> ---
>> james anderson | james@dydra.com | https://dydra.com
>>
>>
>>