Hi all,
I want to export triples from virtuoso line by line (efficient streaming
into another process)
in NT format.
I came with the following code ($1), where is a sparql query filled in by
bash
CREATE PROCEDURE dump_query_tmp( )
{
DECLARE col BLOB;
DECLARE env, ses any;
RESULT_NAMES(col);
SET ISOLATION = 'uncommitted';
ses := string_output ();
env := vector (0, 0, 0);
FOR (SELECT * FROM ( SPARQL DEFINE input:storage ""
SELECT ?s ?p ?o { $1}
) AS sub OPTION (LOOP)) DO
{
http_rewrite(ses);
http_nt_triple (env, "s", "p", "o", ses);
result(string_output_string (ses));
}
end_result();
};
All goes well, except when a line is longer than 2000 characters.
Warning 01004: [Virtuoso Driver]CL077: Data truncated in column 1 of the
result-se(col, type 254)
at line 33 of Command-Line-Load /tmp/the_query.sparql:
dump_query_tmp()
I changed the type of he object given to result_names to just about
anything I could think off, but no avail. I can work around it of course
(split it out etc) but I am doing something wrong of is this some
limitation?
If someone has an entirely different way to accomplish exactly the same: by
my guest to show me!
Thanks in advance!
Kenny
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