chatGPT has made an interesting and useful attempt for a change [image: image.png]
On Fri, Nov 10, 2023 at 9:03 PM Andy Seaborne <[email protected]> wrote: > > > On 10/11/2023 20:35, Marco Neumann wrote: > > On Fri, Nov 10, 2023 at 5:51 PM Andy Seaborne <[email protected]> wrote: > > > >> > >> > >> On 10/11/2023 12:33, Marco Neumann wrote: > >>> Should DELETE {URI URI * } not update all matching graph patterns? > >> > >> No. > >> (and that's bad syntax) > >> > >>> I had a case where only DELETE {URI URI NODE } did execute the update > in > >>> the dataset/graph/query fuseki UI. > >>> > >>> To be precise it is a DELETE INSERT combination with an empty WHERE > >> clause. > >>> > >>> DELETE {pattern} INSERT{pattern} WHERE{ } > >> > >> the "pattern" is used as a template. > >> DELETE {template} INSERT {template} WHERE {pattern} > >> > >> If the template has variables, these variables must be set by the WHERE > >> clause. Otherwise triple patterns with unbound variables are skipped. > >> > > > > OK, yes I think this is my case, an unbound variable was used in the > > template, the "Update Success" tricked me into believing that the data > was > > actually removed. > > "Update Success" means "executed as per spec" :-) > > It's the same rule as CONSTRUCT which skips triples with any unbound > variables. > > Andy > > >> > >> There is no pattern matching in a template. > >> > >> There is a short form DELETE WHERE { pattern } which is > >> DELETE { pattern } WHERE {pattern}, using the pattern as the template. > >> > >> Andy > >> > >>> > >>> Marco > >>> > >> > > > > > -- --- Marco Neumann
