[jira] [Created] (SOLR-12505) Streaming expressions - fetch() does not work as expected

["Dariusz Wojtas (JIRA)" <ji...@apache.org>]

Dariusz Wojtas created SOLR-12505:
-------------------------------------

             Summary: Streaming expressions - fetch() does not work as expected
                 Key: SOLR-12505
                 URL: https://issues.apache.org/jira/browse/SOLR-12505
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
    Affects Versions: 7.3.1
         Environment: Windows 10, Java 10, Solr Cloud 7.3.1
            Reporter: Dariusz Wojtas


The issue:
 # when I try to use fetch() within a streaming expression, it does not enrich the inner source data. The result is exactly the same as if there was no surrounding fetch() function.
 # but it works if I try to do a leftOuterJoin() function instead.

Use the attached 'names' collection configuration.
 SOLR works in _cloud_ mode, streaming expressions do work, ie. stream(), join(), etc

Data to be inserted:
 ==
{code:xml}
 <add>
 <doc>
 <field name="id">1</field>
 <field name="type">entity</field>
 <field name="name">Orignal Darek name</field>
 <field name="country">uk</field>
 <doc>
 <field name="id">N001</field>
 <field name="parentId">1</field>
 <field name="type">alternate</field>
 <field name="alias">Darek</field>
 </doc>
 <doc>
 <field name="id">N002</field>
 <field name="parentId">1</field>
 <field name="type">alternate</field>
 <field name="alias">Darke</field>
 </doc>
 <doc>
 <field name="id">N003</field>
 <field name="parentId">1</field>
 <field name="type">alternate</field>
 <field name="alias">Darko</field>
 </doc>
 </doc>
 <doc>
 <field name="id">2</field>
 <field name="type">entity</field>
 <field name="name">Texaco</field>
 <field name="country">de</field>
 <doc>
 <field name="id">N0011</field>
 <field name="parentId">2</field>
 <field name="type">alternate</field>
 <field name="alias">Texxo</field>
 </doc>
 <doc>
 <field name="id">N0012</field>
 <field name="parentId">2</field>
 <field name="type">alternate</field>
 <field name="alias">Texoco</field>
 </doc>
 </doc>
 </add>
{code}
==
 The streaming query to execute.
 Simplified, as the mainsearch usually does more complext stuff.
 ==
{noformat}
 fetch( 
 names,
 search(names,
 qt="/select",
 q="*:*",
 fq="type:alternate",
 fl="parentId, alias",
 rows=10,
 sort="parentId asc"), 
 on="parentId=id",
 fl="name,country"
 )
{noformat}
==

*Result*:
 * Collection of attributes: parentId, alias

*Expected result*:
 * Collection of attributes: parentId, alias, name, country



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