Thanks for the advice
I'll try this construct --- liemyu say it it is easier to read and
understand).
Ian
On 23/12/2013 05:43, Quentin wrote:
Ian,
It may not be being truncated. Some but not all of the sparql
compilation entries from trace_on() are truncated but it's only the
debug output that is being truncated, not the query itself. This has
caused me confusion before.
Not guaranteed to work but you might try an alternate construct, if
nothing else it's easier to read and since it's a little more
orthodox, it's more likely to be well understood by the query
optimiser. A post from Hugh last week suggests that there may be
additional optimisation for IN based lookups comoing though they may
or may not apply to this usage.
select ?thing ?x ?y ?z
where {
?thing predicate1 ?x .
?thing predicate2 ?y .
?thing predicate3 ?z .
filter (?thing in (
<http://host/id/thing/1>,
<http://host/id/thing/2>,
...
))
}
On 19 December 2013 00:15, Ian Harrison <i...@big-data-analytics.com
<mailto:i...@big-data-analytics.com>> wrote:
I'm hitting a problem with Virtuoso 7 with the use of large filters
...... the scenario is that I'm setting a query variable value to
be one
of many things ... rather than returning all values for that query
variable
e.g. select ?yhing ?x ?y ?x where {?thing predicate1 ?x . ?thing
predicate2 ?y . ?thing predicate3 ?z filter (? thing =
<http://host/id/thing/1> || ?thing = <http://host/id/thing/2> ||
?thing
= <http://host/id/thing/3> || ?thing = <http://host/id/thing/4> ||
?thing = <http://host/id/thing/5> || ....
there might be 100-200 things in the filter list ... but there may be
millions of instances of ?thing.
The error thrown is:
Virtuoso 37000 Error SQ156: Internal Optimized compiler error :
unknown
table for a column dfe in sqldf.c:1422.
Please report the statement compiled.
SPARQL query:
Virtuoso 37000 Error SQ156: Internal Optimized compiler error :
unknown
table for a column dfe in sqldf.c:1422.
Please report the statement compiled.
With trace_on() setup, it l;ooks like the filter is being
truncated. Can
you try and replicate such a test case. It's important for my
application, as I'm using the OR filter pattern, as a way of
delivering
data services of the form ... do a search to identify a set of
things of
interest and then return lots of data about the items that have been
returned by the search ..... I'm open to suggestions of a workaround
tpo, if this is aknown problem, to be able to handle such a data
pattern.
Ian
--
Ian Harrison Email: i...@big-data-analytics.com
<mailto:i...@big-data-analytics.com>
Tel: +44 (0)7580 618125 <tel:%2B44%20%280%297580%20618125>
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--
Quentin | Clear Blue Water Pty Ltd
quent...@clearbluewater.com.au <mailto:quent...@clearbluewater.com.au>
--
Ian Harrison Email: i...@big-data-analytics.com
Tel: +44 (0)7580 618125
------------------------------------------------------------------------------
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organizations don't have a clear picture of how application performance
affects their revenue. With AppDynamics, you get 100% visibility into your
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