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https://issues.apache.org/jira/browse/SOLR-7560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14590518#comment-14590518
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Christine Poerschke commented on SOLR-7560:
-------------------------------------------
Looked into and learnt some more on this. The original {{'ant resolve'}} error
was
{code}
[ivy:retrieve] ::::::::::::::::::::::::::::::::::::::::::::::
[ivy:retrieve] :: UNRESOLVED DEPENDENCIES ::
[ivy:retrieve] ::::::::::::::::::::::::::::::::::::::::::::::
[ivy:retrieve] :: com.facebook.presto#presto-parser;0.107:
configuration not found in com.facebook.presto#presto-parser;0.107: 'master'.
It was required from org.apache.solr#core;working@hostname compile.hadoop
[ivy:retrieve] ::::::::::::::::::::::::::::::::::::::::::::::
{code}
and i found
http://wrongnotes.blogspot.co.uk/2014/02/simplest-explanation-of-ivy.html
useful to understand the meaning of the error and what the
{{conf="compile->*"}} attribute addition means (still in combination with
customised {{lucene/ivy-settings.xml}} though).
Following on from that, i cleared my ivy cache and tried this alternative,
shorter dependency declaration
{code}
- <dependency org="com.facebook.presto" name="presto-parser"
rev="${/com.facebook.presto/presto-parser}"/>
- <dependency org="org.antlr" name="antlr4-runtime"
rev="${/org.antlr/antlr4-runtime}"/>
- <dependency org="io.airlift" name="slice" rev="${/io.airlift/slice}"/>
+ <dependency org="com.facebook.presto" name="presto-parser"
rev="${/com.facebook.presto/presto-parser}" conf="compile.hadoop->*"/>
{code}
and that also worked but since the
https://repo1.maven.org/maven2/com/facebook/presto/presto-parser/0.107/presto-parser-0.107.pom
file has additional dependencies apart from {{org.antlr antlr4-runtime}} and
{{io.airlift slice}} the shorter alternative is perhaps/probably not equivalent
to the original dependency trio.
> Parallel SQL Support
> --------------------
>
> Key: SOLR-7560
> URL: https://issues.apache.org/jira/browse/SOLR-7560
> Project: Solr
> Issue Type: New Feature
> Components: clients - java, search
> Reporter: Joel Bernstein
> Fix For: 5.3
>
> Attachments: SOLR-7560.patch, SOLR-7560.patch, SOLR-7560.patch,
> SOLR-7560.patch
>
>
> This ticket provides support for executing *Parallel SQL* queries across
> SolrCloud collections. The SQL engine will be built on top of the Streaming
> API (SOLR-7082), which provides support for *parallel relational algebra* and
> *real-time map-reduce*.
> Basic design:
> 1) A new SQLHandler will be added to process SQL requests. The SQL statements
> will be compiled to live Streaming API objects for parallel execution across
> SolrCloud worker nodes.
> 2) SolrCloud collections will be abstracted as *Relational Tables*.
> 3) The Presto SQL parser will be used to parse the SQL statements.
> 4) A JDBC thin client will be added as a Solrj client.
> This ticket will focus on putting the framework in place and providing basic
> SELECT support and GROUP BY aggregate support.
> Future releases will build on this framework to provide additional SQL
> features.
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