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[ZEPPELIN-3644] SPARQL-Interpreter support via Apache Jena ARQ #3480

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commented Oct 9, 2019

What is this PR for?

Interpreter for SPARQL-queries on any SPARQL-endpoint via Apache Jena ARQ.

SPARQL is an RDF query language able to retrieve and manipulate data stored in Resource Description Framework (RDF) format.

What type of PR is it?



  • - Task

What is the Jira issue?

How should this be tested?

Screenshots (if appropriate)



  • Does the licenses files need update? Yes, added in PR
  • Is there breaking changes for older versions? No
  • Does this needs documentation? Yes, added in PR
public InterpreterResult interpret(String queryString, InterpreterContext context) {
final String serviceEndpoint = getProperty(SPARQL_SERVICE_ENDPOINT);
final String replaceURIs = getProperty(SPARQL_REPLACE_URIS);
final String removeDatatypes = getProperty(SPARQL_REMOVE_DATATYPES);

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zjffdu Oct 17, 2019


These variables should be initialized in open method

public void cancel(InterpreterContext context) {

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zjffdu Oct 17, 2019


cancel is unable to be supported ? Or do you have plan to support it ?

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