Read up on the edismax query parser first:
http://wiki.apache.org/solr/ExtendedDisMax
The "^" operator is known as boosting or field boosting and is used to
influence document scores for relevancy.
It has no analog in SQL.
-- Jack Krupansky
-----Original Message-----
From: nativecoder
Sent: Monday, May 5, 2014 9:11 AM
To: solr-user@lucene.apache.org
Subject: Help to Understand a Solr Query
Hi All
I am completely new to solr and hoping to understand the basics. Can one of
you help me to understand what the following query does, in which order it
is getting executed
I understand that when this query is executed fields mentioned in fieldList
will be returned. What I don't understand is how the "samplestring1" and
"samplestring2" will get searched with the query fields specified
I think I will be able to understand how the search happens if this can be
illustrated in SQL ( Just to understand what happens behind the scene)
Following is the query. Please have a look at it and let me know how this
works internally.
query=samplestring1 AND samplestring2
defType: edismax
queryFields: Exact_Field1^1.0 Exact_Field2^0.9 Field1^0.8 Field2^0.7
fieldList: Column1, Column2
resultRows: 10
startRow: 0
P.S samplestring1 AND samplestring2 are some test strings in the query
Sample of Schema for fields
<fieldType name="sampletype1" class="solr.TextField"
positionIncrementGap="100"><analyzer type="index"><tokenizer
class="solr.KeywordTokenizerFactory"/><filter
class="solr.LowerCaseFilterFactory"/><filter class="solr.NGramFilterFactory"
minGramSize="5" maxGramSize="10"/></analyzer><analyzer
type="query"><tokenizer class="solr.KeywordTokenizerFactory"/><filter
class="solr.LowerCaseFilterFactory"/></analyzer></fieldType>
<fieldtype name="sampletype2" class="solr.TextField" sortMissingLast="true"
omitNorms="true"><analyzer><tokenizer
class="solr.KeywordTokenizerFactory"/><filter
class="solr.LowerCaseFilterFactory"/></analyzer></fieldtype>
<field name="Field1" compressed="true" type="sampletype1"
multiValued="false" indexed="true" stored="true" required="true"
omitNorms="true"/>
<field name="Field2" compressed="true" type="sampletype1"
multiValued="false" indexed="true" stored="true" required="true"
omitNorms="true"/>
<field name="Exact_Field1" omitPositions="true" termVectors="false"
omitTermFreqAndPositions="true" compressed="true" type="sampletype2"
multiValued="false" indexed="true" stored="true" required="true"
omitNorms="true"/>
<field name="Exact_Field2" omitPositions="true" termVectors="false"
omitTermFreqAndPositions="true" compressed="true" type="sampletype2"
multiValued="false" indexed="true" stored="true" required="false"
omitNorms="true"/>
<copyField source="Field1" dest="Exact_Field1"/>
<copyField source="Field2" dest="Exact_Field2"/>
--
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