Re: [Virtuoso-users] Unusual execution time for query

2008-02-03 Thread Ivan Mikhailov
Rajeev, When you click 'Execution plan' button you get a report that consists of three sections. First one simply lists all lexems of query, line by line. The only purpose of the thing is to let you see things like misused quotes or special characters. 'Execution plan' section contains the full SQ

Re: [Virtuoso-users] Unusual execution time for query

2008-02-02 Thread Rajeev J Sebastian
Hi Ivan, I will send the offending query shortly; i need to collect all the relevant info first. In the meantime, could you point to some resources where some detail is given about the query analyser that is available in the sparql client in the sparql demo ? I mean, http://localhost:8890/sparql_

Re: [Virtuoso-users] Unusual execution time for query

2008-02-02 Thread Ivan Mikhailov
Hello Rajeev, It is quite probable that this change in pattern results in global change in join order of the execution plan of the query. For accurate diagnostics I need to know the full text of the query and some statistics about the data set -- total number of quads, number of distinct graphs, d

[Virtuoso-users] Unusual execution time for query

2008-02-01 Thread Rajeev J Sebastian
Hi Ivan and friends, I have a query, which takes an unusual amount of time - as far as I can tell, it never completes! When I remove a triple from the where pattern i.e., ?s ?p . and replace it with ?s ?p ?d . It executes immediately and returns a response. How can I make this faster ? Re