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From "Ryan McKinley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-2444) Update fl syntax to support: pseudo fields, AS, transformers, and wildcards
Date Mon, 04 Apr 2011 19:03:05 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13015551#comment-13015551
] 

Ryan McKinley commented on SOLR-2444:
-------------------------------------

bq, For user directly asking for functions, we'll support (as we already do today)
bq. fl=a,b,foo(c),d]
bq. And if the user wants to change the name, they can use "mykey:foo(c)"

With the addition of the inline transformer syntax

fl=a,b,[explain]

fl=a,b,price:[value:10]


I don't think we can treat the pseudo fields as a totally different issue since the field
list parsing depends on the pseudo fields.  That is, if you have fl=id,foo(c)&fl.pseudo.foo(c)=field_name
 we never actually parse foo(c) as a function -- it needs to  get mapped to the field 'field_name'

I think the fl parser needs a few passes:
1. split fl into tokens (or whatever we call them)
2. each token may get replaced with the value from fl.pseudo.token
3. check if the token is a function, transformer, or wildcard

but yes, it is a conceptually different issue.










> 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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