[Bigdata-developers] Explain not working

[Rose B. <ros...@gm...>]

As stated at http://wiki.bigdata.com/wiki/index.php/NanoSparqlServer
one can pass "explain" as a parameter to SPARQL query passed in CURL.

curl -X POST http://localhost:8080/bigdata/sparql --data-urlencode
'query=SELECT * { ?s ?p ?o } LIMIT 1' -H 'Accept:application/rdf+xml'

However, if I use the following (which works perfectly) well for
Virtuoso, I get an error:
curl -X POST http://localhost:8080/bigdata/sparql --data-urlencode
'query=explain 'SELECT * { ?s ?p ?o } LIMIT 1'' -H
'Accept:application/rdf+xml'

Also "explain" on Bigdata workbench when executed in a browser gives
elapsed time of the time given below:
solutions=2, chunks=1, subqueries=0, elapsed=32ms.

Is the elapsed time same as the query execution time -- if not then
what is the difference? Because on the browser bigdata reports
different elapsed time as well as query execution time.