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https://issues.apache.org/jira/browse/SOLR-2841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13174566#comment-13174566
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Lance Norskog commented on SOLR-2841:
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+1
Another use case for scripting at the top level is "multi-query" queries:
where the app creates the second based on the first. Would your proposal handle
this problem?
Many use cases for grouping/collapsing can be implemented with 2 queries.
Perhaps the guts of collapsing could be simplified if the more outré use cases
could be pushed out into multiple queries.
> Scriptable UpdateRequestChain
> -----------------------------
>
> Key: SOLR-2841
> URL: https://issues.apache.org/jira/browse/SOLR-2841
> Project: Solr
> Issue Type: New Feature
> Components: update
> Reporter: Jan Høydahl
>
> UpdateProcessorChains must currently be defined with XML in solrconfig.xml.
> We should explore a scriptable chain implementation with a DSL that allows
> for full flexibility. The first step would be to make UpdateChain
> implementations pluggable in solrconfig.xml, for backward compat support.
> Benefits and possibilities with a Scriptable UpdateChain:
> * A compact DSL for defining Processors and Chains (Workflows would be a
> better, less limited term here)
> * Keeping update processor config separate from solrconfig.xml gives better
> separations of roles
> * Use this as an opportunity to natively support scripting language
> Processors (ideas from SOLR-1725)
> This issue is spun off from SOLR-2823.
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