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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3251) dynamically add field to schema
Date Thu, 04 Apr 2013 22:32:16 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13622903#comment-13622903
] 

Robert Muir commented on SOLR-3251:
-----------------------------------

Well here's how i see it honestly (given the situation the schema is currently mutable and
if you gave me enough beers, i bet i could find piles of code in the current tree that have
subtle reliance upon that fact):

* option A: immutable
* option B: mutable, but we drink those beers and look for those pieces of code and discuss
and fix them.

I'm just having trouble seeing how option B can really work.

Typically in a case like this, you'd just add some "safeguards", e.g. shit like clone()/freeze()/factor
out abstract schema+unmodifiable()/whatever: then these pieces of code can get immutable "snapshots"
and go about their merry way.

but if you do this, then it really doesn't fix the problem, simply brings back bugs like SOLR-4417
all over again: "you can add your new field to the schema, and its instant, but just dont
index any documents with it without doing a core reload first, or all kinds of shit like similarity
and codecs doesnt work"

                
> dynamically add field to schema
> -------------------------------
>
>                 Key: SOLR-3251
>                 URL: https://issues.apache.org/jira/browse/SOLR-3251
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Yonik Seeley
>            Assignee: Steve Rowe
>         Attachments: SOLR-3251.patch, SOLR-3251.patch
>
>
> One related piece of functionality needed for SOLR-3250 is the ability to dynamically
add a field to the schema.

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