Re: Convert string to float in a SPARQL query
As Andy has pointed out it is the decimal separator that is the problem. SPARQL defers to XML Schema Datatypes for its datatype support and that mandates certain lexical forms for datatypes including the use of ‘.’ As the decimal separator as opposed to ‘,’ in your data. Assuming that you control the source of the data prior to it becoming RDF it would be best to try and fix the conversion of the data at that stage. If you don’t control the data then your best option is probably to create an extension function within Jena that is capable of parsing the Values in the format given in the data and use this in place of the xsd:float() function. Please see the following documentation for more guidance: http://jena.apache.org/documentation/query/extension.html#value-functions Rob On 16/09/2016 09:33, "Andy Seaborne" wrote: On 15/09/16 22:56, lookman sanni wrote: > Hi all, > > I am trying to perform a filter in a SPARQL query, through the below code: > > FILTER ( abs(xsd:float(?tAmount1)) = abs(xsd:float(?tAmount2)) ) > > The query is being parsed correctly, but I am not getting the expected > result. Any clue why this would not convert and compare those amounts > properly ? The amounts are formatted like this: "+8644,00". > > Thanks in advance for the help. > In XSD, floats have "." not "," for the decimal separator. Andy
Re: Convert string to float in a SPARQL query
On 15/09/16 22:56, lookman sanni wrote: Hi all, I am trying to perform a filter in a SPARQL query, through the below code: FILTER ( abs(xsd:float(?tAmount1)) = abs(xsd:float(?tAmount2)) ) The query is being parsed correctly, but I am not getting the expected result. Any clue why this would not convert and compare those amounts properly ? The amounts are formatted like this: "+8644,00". Thanks in advance for the help. In XSD, floats have "." not "," for the decimal separator. Andy
Re: Convert string to float in a SPARQL query
good morning; > On 2016-09-15, at 23:56, lookman sanni wrote: > > Hi all, > > I am trying to perform a filter in a SPARQL query, through the below code: > > FILTER ( abs(xsd:float(?tAmount1)) = abs(xsd:float(?tAmount2)) ) > > The query is being parsed correctly, but I am not getting the expected > result. Any clue why this would not convert and compare those amounts > properly ? The amounts are formatted like this: "+8644,00". > > Thanks in advance for the help. have you tried to use the query itself to diagnose the issue? if you make it have it return the solution bindings for the cases which do not match your expectation, perhaps extended with converted values, you may see that there is some assumption embedded in your query which is not reflected in your data. it is also possible the discrepancy between the result and your expectation arises somewhere else in the query. if you are in a position to post it in its entirety, it might be possible to shed light on that. best regards, from berlin --- james anderson | ja...@dydra.com | http://dydra.com
Re: Convert string to float in a SPARQL query
I am trying to convert some text values to numeric so that I can compare their absolute values. Hopefully it is clearer. Le 16 sept. 2016 00:01, "A. Soroka" a écrit : > https://stackoverflow.com/help/mcve > > What data are you using? What is the complete action you are exercising? > What results do you expect? What results do you get? > > --- > A. Soroka > The University of Virginia Library > > > On Sep 15, 2016, at 5:56 PM, lookman sanni wrote: > > > > Hi all, > > > > I am trying to perform a filter in a SPARQL query, through the below > code: > > > > FILTER ( abs(xsd:float(?tAmount1)) = abs(xsd:float(?tAmount2)) ) > > > > The query is being parsed correctly, but I am not getting the expected > > result. Any clue why this would not convert and compare those amounts > > properly ? The amounts are formatted like this: "+8644,00". > > > > Thanks in advance for the help. > > > > -- > > Best Regards > > > > Lookman SANNI > >
Re: Convert string to float in a SPARQL query
https://stackoverflow.com/help/mcve What data are you using? What is the complete action you are exercising? What results do you expect? What results do you get? --- A. Soroka The University of Virginia Library > On Sep 15, 2016, at 5:56 PM, lookman sanni wrote: > > Hi all, > > I am trying to perform a filter in a SPARQL query, through the below code: > > FILTER ( abs(xsd:float(?tAmount1)) = abs(xsd:float(?tAmount2)) ) > > The query is being parsed correctly, but I am not getting the expected > result. Any clue why this would not convert and compare those amounts > properly ? The amounts are formatted like this: "+8644,00". > > Thanks in advance for the help. > > -- > Best Regards > > Lookman SANNI
