- From: Eric Prud'hommeaux <eric@w3.org>
- Date: Tue, 4 Jan 2011 22:43:14 -0500
- To: Andy Seaborne <andy.seaborne@epimorphics.com>
- Cc: SPARQL Working Group <public-rdf-dawg@w3.org>
* Andy Seaborne <andy.seaborne@epimorphics.com> [2011-01-04 13:01+0000] > > > On 03/01/11 17:16, Eric Prud'hommeaux wrote: > >+ > >I like using BINDINGs in subselects for getting my head around (i.e. > >debugging) aggregate queries as it puts the pre-aggregated result set > >directly in my face. I use this for didactic and testing purposes: > > http://swobjects.svn.sourceforge.net/viewvc/swobjects/branches/sparql11/tests/sparql11/groupBy-f-having-f.rq?revision=1264&view=markup > > More generally, inline data tables - i.e. the ability to put data > into a query directly. There are some ways to this - > BINDINGS+SubSELECT but also anywhere AS is used can be combined with > UNION to produce inline data. The latter may be very verbose :-) true, this validates: SELECT ?a (COUNT(?b) AS ?d) WHERE { { BIND (1 AS ?a) BIND (2 AS ?b) BIND (3 AS ?c) } UNION { BIND (4 AS ?a) BIND (5 AS ?b) BIND (6 AS ?c) } } GROUP BY ?c > A more consistent approach might be: > > TABLE ?a ?b ?c { (1 2 3) (4 5 6) } > > to put anywhere in graph pattern. > > (not a proposal for this version of the spec) Just for yucks, I tried: GraphPatternNotTriples ::= GroupOrUnionGraphPattern | OptionalGraphPattern | MinusGraphPattern | GraphGraphPattern | ServiceGraphPattern | Filter | Bind | "BINDINGS" Var* "{" ( "(" BindingValue+ ")" | NIL )* "}"¹ and got no reduce/reuse/recycle conflicts. http://www.w3.org/2005/01/yacker?name=SPARQL_11&replace=1&lang=perl#prod-SPARQL_11-GraphPatternNotTriples e.g. http://www.w3.org/2005/01/yacker/uploads/SPARQL_11?lang=perl&text=SELECT+%3Fa+%28COUNT%28%3Fb%29+AS+%3Fd%29+WHERE+{%0D%0A++BINDINGS+%3Fa+%3Fb+%3Fc+{+%281+2+3%29+%284+5+6%29+}%0D%0A}+GROUP+BY+%3Fc&action=validate+text#language ¹ This is the same as the current BindingsClause except that the BindingsClause is all optional. > Andy -- -ericP
Received on Wednesday, 5 January 2011 03:44:40 UTC