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https://issues.apache.org/jira/browse/SOLR-12420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17343557#comment-17343557
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David Smiley commented on SOLR-12420:
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The essence of what I want most is to eliminate the need for a version specific
to the schema file. If we are to have any configuration version at all for
Solr configuration (debatable!), then one is enough to govern the whole
configSet: solrconfig.xml + schema.xml + anything else next to it like
elevate.xml etc. I argue this is easier to maintain, and sufficient. If we
are to have a Solr wide configuration variable, then we might call this a
"solrCompatVersion" or some-such.
luceneMatchVersion is about tokenization compatibility of the index, and only a
handful of Lucene level things react to this setting.
> Propose removing schema version; use luceneMatchVersion instead
> ---------------------------------------------------------------
>
> Key: SOLR-12420
> URL: https://issues.apache.org/jira/browse/SOLR-12420
> Project: Solr
> Issue Type: Improvement
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Major
> Fix For: main (9.0)
>
>
> I propose that the schema version be removed in lieu of using
> luceneMatchVersion for this. One less thing to manage (in code, need REST
> API -- SOLR-7242, thing to document; etc.). We don't need the fidelity to
> differentiate from luceneMatchVersion. We're already using
> luceneMatchVersion for things instead of having a ton of additional version
> numbers. I can understand the point of putting a version number in in a
> config file but I don't think we should continue this practice.
> To make this happen, if the luceneMatchVersion is >= 7.4 (the release which
> we start doing this) then a non-existent schema version becomes equivalent to
> the latest schema version. Specifying the schema version becomes deprecated
> but supported; we might log a warning.
> In 8.0, strip schema version out altogether.
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