virtuoso-users

[Virtuoso-users] SPARQL, backslash in URIs

[Alexey Z. <ind...@gm...>]

Hi.

I have a dataset, which has backslash character in some of the Subject URIs. Whenever I try to use such URI in SPARQL Query, Virtuoso gives me this:

    Virtuoso 37000 Error SP030: SPARQL compiler, line 0: Invalid character in SPARQL expression at '\'

Do I need to escape backslash somehow? I tried to replace it with "%5C" and "%5c" but that just gives me empty result set.

Example of URI:

<http://example.com/some/path/and\more>

Re: [Virtuoso-users] SPARQL, backslash in URIs

[Hugh W. <hwi...@op...>]

Hi Alexey,

The following param in the Virtuoso INI file controls the handling of the backslash character:

SQL_NO_CHAR_C_ESCAPE=0
This options is 0 by default and can be either 1 or 0. This option controls Virtuoso's interpretation of the backslash in PL text which is normal interpreted as escaping rather than literal.

as detailed at:

	http://docs.openlinksw.com/virtuoso/dbadm.html

Best Regards
Hugh Williams
Professional Services
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On 26 Mar 2013, at 14:04, Alexey Zakhlestin <ind...@gm...> wrote:

> Hi.
> 
> I have a dataset, which has backslash character in some of the Subject URIs. Whenever I try to use such URI in SPARQL Query, Virtuoso gives me this:
> 
>    Virtuoso 37000 Error SP030: SPARQL compiler, line 0: Invalid character in SPARQL expression at '\'
> 
> Do I need to escape backslash somehow? I tried to replace it with "%5C" and "%5c" but that just gives me empty result set.
> 
> Example of URI:
> 
> <http://example.com/some/path/and\more>
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