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https://issues.apache.org/jira/browse/SOLR-7938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14995429#comment-14995429
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Dennis Gove edited comment on SOLR-7938 at 11/7/15 10:42 PM:
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-Still need to update
https://cwiki.apache.org/confluence/display/solr/Streaming+Expressions with the
updated functionality.-
The page at that link is marked as "This Unreleased Guide Will Cover Apache
Solr 5.4". As this patch has only been added to trunk at this point I believe
that page shouldn't actually be updated.
I did look at the backporting of this to branch_5x but it depends on a new
interface added in SOLR-7707 which has not been backported. Going to
investigate splitting that patch up into pieces which can be backported to
branch_5x.
was (Author: dpgove):
Still need to update
https://cwiki.apache.org/confluence/display/solr/Streaming+Expressions with the
updated functionality.
> MergeStream to support N streams
> --------------------------------
>
> Key: SOLR-7938
> URL: https://issues.apache.org/jira/browse/SOLR-7938
> Project: Solr
> Issue Type: Improvement
> Components: SolrJ
> Affects Versions: Trunk
> Reporter: Dennis Gove
> Assignee: Dennis Gove
> Priority: Minor
> Labels: streaming
> Attachments: SOLR-7938.patch
>
>
> Enhances MergeStream to support merging N streams. This was previously
> limited to merging just two streams but with this enhancement it can now
> accept any number of streams to merge.
> Based on the comparator, if more than one stream could provide the next value
> then the selected value will follow the order of the streams as they appear
> in the expression or were added to the MergeStream object.
> {code}
> merge(
> search(collection1, q="id:(0 4)", fl="id,a_s,a_i,a_f", sort="a_f asc, a_s
> asc"),
> search(collection1, q="id:(1)", fl="id,a_s,a_i,a_f", sort="a_f asc, a_s
> asc"),
> search(collection1, q="id:(2)", fl="id,a_s,a_i,a_f", sort="a_f asc, a_s
> asc"),
> on="a_f asc"
> )
> {code}
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