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https://issues.apache.org/jira/browse/SOLR-1033?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12675564#action_12675564
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Noble Paul commented on SOLR-1033:
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the output of one transformer can be consumed from other.
example
{code}
<entity transformer="TemplateTransformer,RegexTransformer">
<field column="a" template="hello"/>
<field column="b" regex="(.*)" sourceColName="a"/>
</entity>
{code}
in this case , the output of TemplateTransformer goes to 'a' . The
RegexTransformer can read from column 'a' and it can be put into column 'b' .
It is still possible to have another transformer which reads from 'b' and puts
the value into 'c'
Is this the usecase? or am I missing something?
> DIH transformers cannot reuse output from previous transformations
> ------------------------------------------------------------------
>
> Key: SOLR-1033
> URL: https://issues.apache.org/jira/browse/SOLR-1033
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Affects Versions: 1.4
> Environment: All operating systems and software platforms
> Reporter: Fergus McMenemie
> Fix For: 1.4
>
> Attachments: SOLR-1033.patch
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> It can be very useful to reuse the output from a DIH template in other
> templates and or regex transformers. Currently this cannot be done. The
> resolver is initialized at the start of the transformer run with what ever
> values exist for a column name at that instant. As the transformer executes
> it may define new values for column names. My change is intended to update
> the hash used by the resolver after each successful transformation.
> This only applies to the template and regex transformers.
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