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https://issues.apache.org/jira/browse/SOLR-12010?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amrit Sarkar updated SOLR-12010:
--------------------------------
Attachment: SOLR-12010.patch
> Better error handling for Parallel SQL queries
> ----------------------------------------------
>
> Key: SOLR-12010
> URL: https://issues.apache.org/jira/browse/SOLR-12010
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Parallel SQL
> Affects Versions: master (8.0)
> Reporter: Amrit Sarkar
> Priority: Minor
> Attachments: SOLR-12010.patch
>
>
> While building examples in Parallel SQL queries, we encountered strange error
> messages which didn't make sense unless you look deeply into the code, in my
> case, using debugger on source code to understand better.
> e.g.
> {code}
> curl --data-urlencode 'stmt=select emp_no_s,emp_no_s from salaries
> group by emp_no_s
> limit 10'
> http://localhost:8983/solr/employees/sql?aggregationMode=map_reduce
> {code}
> aggregate-field 'emp_no_s' is asked to group-by twice and hence this is
> runtime SQL error, while error message received in solr logs:
> {code}
> Caused by: java.sql.SQLException: Error while executing SQL "select
> emp_no_s,emp_no_s from salaries
> group by emp_no_s
> limit 10": 1
> at org.apache.calcite.avatica.Helper.createException(Helper.java:56)
> at org.apache.calcite.avatica.Helper.createException(Helper.java:41)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:156)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeQuery(AvaticaStatement.java:218)
> at
> org.apache.solr.client.solrj.io.stream.JDBCStream.open(JDBCStream.java:269)
> ... 41 more
> Caused by: java.lang.ArrayIndexOutOfBoundsException: 1
> at
> org.apache.solr.handler.sql.SolrTable.buildBuckets(SolrTable.java:559)
> at
> org.apache.solr.handler.sql.SolrTable.handleGroupByMapReduce(SolrTable.java:445)
> at org.apache.solr.handler.sql.SolrTable.query(SolrTable.java:135)
> at org.apache.solr.handler.sql.SolrTable.access$100(SolrTable.java:64)
> at
> org.apache.solr.handler.sql.SolrTable$SolrQueryable.query(SolrTable.java:859)
> at Baz.bind(Unknown Source)
> at
> org.apache.calcite.jdbc.CalcitePrepare$CalciteSignature.enumerable(CalcitePrepare.java:335)
> at
> org.apache.calcite.jdbc.CalciteConnectionImpl.enumerable(CalciteConnectionImpl.java:294)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl._createIterable(CalciteMetaImpl.java:559)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.createIterable(CalciteMetaImpl.java:550)
> at
> org.apache.calcite.avatica.AvaticaResultSet.execute(AvaticaResultSet.java:204)
> at
> org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:67)
> at
> org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:44)
> at
> org.apache.calcite.avatica.AvaticaConnection$1.execute(AvaticaConnection.java:630)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:607)
> at
> org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:638)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:149)
> ... 43 more
> {code}
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