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Posted to users@jena.apache.org by Bob DuCharme <bo...@snee.com> on 2012/12/24 18:05:39 UTC

"BGP" vs. "Reorder" in INFO log messages

When I execute the following query with ARQ and the -v parameter,

    PREFIX : <http://some/uri/>

    SELECT * WHERE {
      OPTIONAL { ?s :comment ?comment . }
      ?s :firstName ?firstName ; :lastName ?lastName .
    }

I see the following in the output:

   11:53:02 INFO  exec     :: BGP :: (?s <http://some/uri/firstName> 
?firstName) (?s <http://some/uri/lastName> ?lastName)
   11:53:03 INFO  exec     :: Reorder :: (?s <http://some/uri/firstName> 
?firstName) (?s <http://some/uri/lastName> ?lastName)
   11:53:03 INFO  exec     :: BGP :: (?s <http://some/uri/comment> ?comment)
   11:53:03 INFO  exec     :: Reorder :: (?s <http://some/uri/comment> 
?comment)

I can see the reordering that was done (especially if I rerun the query 
with optimize=off) but can someone tell me or point me to documentation 
of what "BGP" vs. "Reorder" mean in these INFO messages?

Thanks,

Bob

Re: "BGP" vs. "Reorder" in INFO log messages

Posted by Andy Seaborne <an...@apache.org>.
On 27/12/12 16:35, Bob DuCharme wrote:
> Thanks Andy! And, I take it from the timestamps that they're shown in
> the order in which they're executed.

In the order logged - logging happens "live" as the engine runs.  Don't 
forget ARQ may be using an iterative pipeline so things seem to occur 
multiple times.

	Andy

>
> Bob
>
> On 12/24/2012 12:35 PM, Andy Seaborne wrote:
>> On 24/12/12 17:05, Bob DuCharme wrote:
>>> When I execute the following query with ARQ and the -v parameter,
>>>
>>>     PREFIX : <http://some/uri/>
>>>
>>>     SELECT * WHERE {
>>>       OPTIONAL { ?s :comment ?comment . }
>>>       ?s :firstName ?firstName ; :lastName ?lastName .
>>>     }
>>>
>>> I see the following in the output:
>>>
>>>    11:53:02 INFO  exec     :: BGP :: (?s <http://some/uri/firstName>
>>> ?firstName) (?s <http://some/uri/lastName> ?lastName)
>>>    11:53:03 INFO  exec     :: Reorder :: (?s <http://some/uri/firstName>
>>> ?firstName) (?s <http://some/uri/lastName> ?lastName)
>>>    11:53:03 INFO  exec     :: BGP :: (?s <http://some/uri/comment>
>>> ?comment)
>>>    11:53:03 INFO  exec     :: Reorder :: (?s <http://some/uri/comment>
>>> ?comment)
>>>
>>> I can see the reordering that was done (especially if I rerun the query
>>> with optimize=off) but can someone tell me or point me to documentation
>>> of what "BGP" vs. "Reorder" mean in these INFO messages?
>>
>> "BGP" is the BGP to be executed; "Reorder" is the same BGP but after
>> reordering.
>>
>>     Andy
>>
>>>
>>> Thanks,
>>>
>>> Bob
>>>
>>>
>

Re: "BGP" vs. "Reorder" in INFO log messages

Posted by Bob DuCharme <bo...@snee.com>.
Thanks Andy! And, I take it from the timestamps that they're shown in 
the order in which they're executed.

Bob

On 12/24/2012 12:35 PM, Andy Seaborne wrote:
> On 24/12/12 17:05, Bob DuCharme wrote:
>> When I execute the following query with ARQ and the -v parameter,
>>
>>     PREFIX : <http://some/uri/>
>>
>>     SELECT * WHERE {
>>       OPTIONAL { ?s :comment ?comment . }
>>       ?s :firstName ?firstName ; :lastName ?lastName .
>>     }
>>
>> I see the following in the output:
>>
>>    11:53:02 INFO  exec     :: BGP :: (?s <http://some/uri/firstName>
>> ?firstName) (?s <http://some/uri/lastName> ?lastName)
>>    11:53:03 INFO  exec     :: Reorder :: (?s <http://some/uri/firstName>
>> ?firstName) (?s <http://some/uri/lastName> ?lastName)
>>    11:53:03 INFO  exec     :: BGP :: (?s <http://some/uri/comment>
>> ?comment)
>>    11:53:03 INFO  exec     :: Reorder :: (?s <http://some/uri/comment>
>> ?comment)
>>
>> I can see the reordering that was done (especially if I rerun the query
>> with optimize=off) but can someone tell me or point me to documentation
>> of what "BGP" vs. "Reorder" mean in these INFO messages?
>
> "BGP" is the BGP to be executed; "Reorder" is the same BGP but after 
> reordering.
>
>     Andy
>
>>
>> Thanks,
>>
>> Bob
>>
>>

Re: "BGP" vs. "Reorder" in INFO log messages

Posted by Andy Seaborne <an...@apache.org>.
On 24/12/12 17:05, Bob DuCharme wrote:
> When I execute the following query with ARQ and the -v parameter,
>
>     PREFIX : <http://some/uri/>
>
>     SELECT * WHERE {
>       OPTIONAL { ?s :comment ?comment . }
>       ?s :firstName ?firstName ; :lastName ?lastName .
>     }
>
> I see the following in the output:
>
>    11:53:02 INFO  exec     :: BGP :: (?s <http://some/uri/firstName>
> ?firstName) (?s <http://some/uri/lastName> ?lastName)
>    11:53:03 INFO  exec     :: Reorder :: (?s <http://some/uri/firstName>
> ?firstName) (?s <http://some/uri/lastName> ?lastName)
>    11:53:03 INFO  exec     :: BGP :: (?s <http://some/uri/comment>
> ?comment)
>    11:53:03 INFO  exec     :: Reorder :: (?s <http://some/uri/comment>
> ?comment)
>
> I can see the reordering that was done (especially if I rerun the query
> with optimize=off) but can someone tell me or point me to documentation
> of what "BGP" vs. "Reorder" mean in these INFO messages?

"BGP" is the BGP to be executed; "Reorder" is the same BGP but after 
reordering.

	Andy

>
> Thanks,
>
> Bob
>
>