Cannot get results for Solr queries starting with stop words - json

Question

I am trying to configure the platform allowing queries that start with a stop word.
I have the following document:
{
"responseHeader":{
"status":0,
"QTime":1,
"params":{
"indent":"true",
"q":"*:*",
"wt":"json"}},
"response":{"numFound":1,"start":0,"docs":[
{
"weight_metric":0.3,
"maximumPowerDraw":9,
"beamAngle":50,
"name_de":"German",
"type":["product"],
"id":"5dac69a9-7d54-43f9-b815-0a54e519a1f0",
"name":"Aloa something"
}]
}}
With a field called name, one for English (Default) and another called name_de for German.
But I cannot understand why I do this query http://localhost:8080/solr-webapp/collection1/select?q=name_de:German%20welcher&wt=json&indent=true I am able to see the document in the results.
While if I do this other query with a stop word (welcher) at the beginning I cannot get any result http://localhost:8080/solr-webapp/collection1/select?q=name_de:welcher%20German%20welcher&wt=json&indent=true
While I would like to have the same result of the first query in both cases. However, for the default language it works fine.
Here I copy some snippets of my schema.xml
<fieldType name="text_en" class="solr.TextField" positionIncrementGap="100">
<analyzer type="index">
<tokenizer class="solr.StandardTokenizerFactory"/>
<!-- in this example, we will only use synonyms at query time
<filter class="solr.SynonymFilterFactory" synonyms="index_synonyms.txt" ignoreCase="true" expand="false"/>
-->
<!-- Case insensitive stop word removal.
add enablePositionIncrements=true in both the index and query
analyzers to leave a 'gap' for more accurate phrase queries.
-->
<filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt"
enablePositionIncrements="true"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.EnglishPossessiveFilterFactory"/>
<filter class="solr.KeywordMarkerFilterFactory" protected="protwords.txt"/>
<!-- Optionally you may want to use this less aggressive stemmer instead of PorterStemFilterFactory:
<filter class="solr.EnglishMinimalStemFilterFactory"/>
-->
<filter class="solr.PorterStemFilterFactory"/>
</analyzer>
<analyzer type="query">
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt" ignoreCase="true" expand="true"/>
<filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt"
enablePositionIncrements="true"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.EnglishPossessiveFilterFactory"/>
<filter class="solr.KeywordMarkerFilterFactory" protected="protwords.txt"/>
<!-- Optionally you may want to use this less aggressive stemmer instead of PorterStemFilterFactory:
<filter class="solr.EnglishMinimalStemFilterFactory"/>
-->
<filter class="solr.PorterStemFilterFactory"/>
</analyzer>
</fieldType>
<!-- German -->
<fieldType name="text_de" class="solr.TextField" positionIncrementGap="100">
<analyzer>
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.StopFilterFactory" ignoreCase="true" words="lang/stopwords_de.txt" format="snowball"
enablePositionIncrements="true"/>
<filter class="solr.GermanNormalizationFilterFactory"/>
<!--<filter class="solr.GermanMinimalStemFilterFactory"/>-->
</analyzer>
</fieldType>
...
<field name="name" type="text_en" stored="true" indexed="true"/>
<field name="name_de" type="text_de" stored="true" indexed="true"/>
...
<copyField source="*_de" dest="text_de"/>
<copyField source="name" dest="text"/>
...
<field name="text" type="text_general" stored="false" indexed="true" multiValued="true" termVectors="true"/>
<field name="text_de" type="text_de" stored="false" indexed="true" multiValued="true" termVectors="true"/>
Does anybody have an idea how I can fix this unwanted behavior?
(btw for the field name instead I have the expected behavior with the result http://localhost:8080/solr-webapp/collection1/select?q=name:the%20Aloa&wt=json&indent=true)

Answer 1

The problem is in your query syntax. See this example in the Lucene query syntax documentation. your query is:
name_de:welcher German welcher
Only the first query term is going to be searched in name_de. The rest will be searched in the default field (name). You're query is effectively:
name_de:welcher name:German name:welcher
Instead, try:
name_de:(welcher German welcher)