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https://issues.apache.org/jira/browse/LUCENE-4591?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13511425#comment-13511425
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Renaud Delbru commented on LUCENE-4591:
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{quote}
How would you do that? As far as I know, the only way to access stored fields
is through the StoredFieldVisitor API
{quote}
Yes, but we can pass our own implementation of StoredFieldVisitor with our own
specific information about what to retrieve.
So from Adrien and Robert feedback, it looks like you do not really want to see
a perfield StoredFieldsFormat mechanism. that's fine and understandable.
Could we instead try to open/extend the current code base so that we are more
free to extend it on our side ? For example, opening
CompressingStoredFieldsWriter and CompressingStoredFieldsReader, as well as
making them configurable with a segment suffixes ? That would greatly help.
> Make StoredFieldsFormat more configurable
> -----------------------------------------
>
> Key: LUCENE-4591
> URL: https://issues.apache.org/jira/browse/LUCENE-4591
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/codecs
> Affects Versions: 4.1
> Reporter: Renaud Delbru
> Fix For: 4.1
>
>
> The current StoredFieldsFormat are implemented with the assumption that only
> one type of StoredfieldsFormat is used by the index.
> We would like to be able to configure a StoredFieldsFormat per field,
> similarly to the PostingsFormat.
> There is a few issues that need to be solved for allowing that:
> 1) allowing to configure a segment suffix to the StoredFieldsFormat
> 2) implement SPI interface in StoredFieldsFormat
> 3) create a PerFieldStoredFieldsFormat
> We are proposing to start first with 1) by modifying the signature of
> StoredFieldsFormat#fieldsReader and StoredFieldsFormat#fieldsWriter so that
> they use SegmentReadState and SegmentWriteState instead of the current set of
> parameters.
> Let us know what you think about this idea. If this is of interest, we can
> contribute with a first path for 1).
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