Petr Křemen created JENA-2341:
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Summary: Configurable CSV format of SPARQL query output
Key: JENA-2341
URL: https://issues.apache.org/jira/browse/JENA-2341
Project: Apache Jena
Issue Type: New Feature
Components: ARQ, Jena
Affects Versions: Jena 4.5.0
Reporter: Petr Křemen
org.apache.jena.riot.resultset.rw.ResultsWriter outputs a CSV where some fields
are double quoted and some are not, based on their content (this is fully
compliant with [RFC-4180|https://datatracker.ietf.org/doc/html/rfc4180]), for
example:
entity,language
[http://test.org/c1],"";
[http://test.org/c2,en]
Output format configuration makes it more flexible for subsequent processing.
For example, parsing of CSVs which contain double quotes all the times
simplifies their processing, once a custom parser needs to be used:
This feature request is to allow the ResultsWriter clients to decide when to
use double quotes - e.g. like
[https://commons.apache.org/proper/commons-csv/apidocs/org/apache/commons/csv/QuoteMode.html]
However, given this minimal requirement, an option would be to have a fully
OpenCSV compliant implementation of CSV output similarly to CSV parsing
(JENA-699) and allow other configurations too (e.g. the quote symbol, as per
[https://commons.apache.org/proper/commons-csv/apidocs/org/apache/commons/csv/CSVFormat.html|https://commons.apache.org/proper/commons-csv/apidocs/org/apache/commons/csv/CSVFormat.html#EXCEL]).
(The discussion to this issue can be found at JENA-2338)
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