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https://issues.apache.org/jira/browse/SOLR-1925?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yonik Seeley updated SOLR-1925:
-------------------------------
Attachment: SOLR-1925.patch
Here's a patch that produces output that can correctly round-trip with the CSV
loader.
It uses the current version of commons CSV, including the CSVPrinter overhaul
I did in SANDBOX-322
Parameters:
csv.encapsulator (defaults to ")
csv.escape (defaults to none)
csv.separator (defaults to ,)
csv.header (defaults to true... if false, we skip printing out the column
headers)
csv.newline (defaults to \n)
csv.null (defaults to "")
// csv.mv params are the defaults for how multi-valued fields are encoded
// per-field overrides can be done via f.myfield.csv.separator=|
csv.mv.encapsulator (defaults to none)
csv.mv.escape (defaults to \)
csv.mv.separator (defaults to csv.separator)
Notes:
- works on fields in the index that aren't even defined in the schema
- maintains the order of fields passed in by the user (and allows the header
to be omitted)
- efficiently streamable... avoids intermediate creation of SolrDocument
instances, and reuses a single buffer & writer across all instances of
multi-valued fields for the sub-CSVPrinters
I'll start adding some tests now.
> CSV Response Writer
> -------------------
>
> Key: SOLR-1925
> URL: https://issues.apache.org/jira/browse/SOLR-1925
> Project: Solr
> Issue Type: New Feature
> Components: Response Writers
> Environment: indep. of env.
> Reporter: Chris A. Mattmann
> Assignee: Erik Hatcher
> Fix For: Next
>
> Attachments: SOLR-1925.Chheng.071410.patch.txt,
> SOLR-1925.Mattmann.053010.patch.2.txt, SOLR-1925.Mattmann.053010.patch.3.txt,
> SOLR-1925.Mattmann.053010.patch.txt, SOLR-1925.Mattmann.061110.patch.txt,
> SOLR-1925.patch
>
>
> As part of some work I'm doing, I put together a CSV Response Writer. It
> currently takes all the docs resultant from a query and then outputs their
> metadata in simple CSV format. The use of a delimeter is configurable (by
> default if there are multiple values for a particular field they are
> separated with a | symbol).
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