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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-2444) Update fl syntax to support: pseudo fields, AS, transformers, and wildcards
Date Tue, 05 Apr 2011 20:41:05 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13016107#comment-13016107
] 

Yonik Seeley commented on SOLR-2444:
------------------------------------

bq. no need for the '_' with transformers – i would hope that the brackets tell you that
it is a tranformer.

Right, but it seems like the name of the transformer should match the field that it adds to
the document by default?  That's just a convention of course... for example, fl=_docid_ adds
the _docid_ field to the documents.  It seems natural to refer to the transformer that does
that as the _docid_ transformer?

bq. I still don't get this. How do you know that the literal is not referring to a field (or
invalid field)? How do you know it is an int vs float vs double vs string? Seems like too
much magic to me.

It's magic people expect, and easy to understand, because most of their programming languages
work that way. It's unlikely that float vs double would matter for returning a constant anyway
- and things like JSON don't even distinguish.  A string would be quoted, and an int would
lack characteristics of a float/doube.

We could even add float() int() double() long() functions in the future if we really need
them.

 

> Update fl syntax to support: pseudo fields, AS, transformers, and wildcards
> ---------------------------------------------------------------------------
>
>                 Key: SOLR-2444
>                 URL: https://issues.apache.org/jira/browse/SOLR-2444
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Ryan McKinley
>         Attachments: SOLR-2444-fl-parsing.patch, SOLR-2444-fl-parsing.patch
>
>
> The ReturnFields parsing needs to be improved.  It should also support wildcards

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