I had difficulties getting this to work, so hopefully this will help others
having the same issue.
My environment:
Solr 3.1
MySQL 5.0.77
Schema:
<fieldType name="location" class="solr.LatLonType"
subFieldSuffix="_coordinate"/>
<field name="latlng" type="location" indexed="true" stored="true"/>
<dynamicField name="*_coordinate" type="tdouble" indexed="true"
stored="false"/>
DIH data-config:
<dataSource driver="java.lang.String"
url="jdbc:mysql://xxx.xxx.xxx.xxx/db1" user="user" password="secret"
readOnly="true" batchSize="-1"/>
<entity name="practice" pk="id" query="select id, name, concat_ws(',',
lat, lng) as latlng from practice "></entity>
I kept getting build errors similar to this:
org.apache.solr.common.SolrException:
org.apache.lucene.spatial.tier.InvalidGeoException: incompatible dimension
(2) and values ([B@2964a05d). Only 0 values specified
at org.apache.solr.schema.PointType.createFields(PointType.java:77)
at org.apache.solr.update.DocumentBuilder.addField(DocumentBuilder.java:199)
at
org.apache.solr.update.DocumentBuilder.toDocument(DocumentBuilder.java:277)
at
org.apache.solr.update.processor.RunUpdateProcessor.processAdd(RunUpdateProc
essorFactory.java:60)
at org.apache.solr.handler.dataimport.SolrWriter.upload(SolrWriter.java:73)
at
org.apache.solr.handler.dataimport.DataImportHandler$1.upload(DataImportHand
ler.java:291)
at
org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:
625)
at
org.apache.solr.handler.dataimport.DocBuilder.doFullDump(DocBuilder.java:265
)
at
org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:184)
at
org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.ja
va:335)
at
org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:393
)
at
org.apache.solr.handler.dataimport.DataImporter$1.run(DataImporter.java:374)
Caused by: org.apache.lucene.spatial.tier.InvalidGeoException: incompatible
dimension (2) and values ([B@2964a05d). Only 0 values specified
at
org.apache.lucene.spatial.DistanceUtils.parsePoint(DistanceUtils.java:376)
at org.apache.solr.schema.PointType.createFields(PointType.java:75)
This would happen regardless of whether I used PointType, LatLonType, or
GeoHashField.
So I thought maybe I should pay attention to what the error says -
"incompatible dimension (2) and values ([B@2964a05d). Only 0 values
specified". Looking at the code, this revealed that it's trying to parse
"B@2964a05d" into a spatial field. So my DIH was getting bad values
apparently, there's a bug in MySQL 5.0:
http://bugs.mysql.com/bug.php?id=12030 where concat changes the character
set to binary.
To solve this, you can either:
* upgrade to MySQL 5.5 (according to the bug page, it was fixed in 5.5, but
I haven't tested it).
* Or you can typecast before you concat:
> * <entity name="practice" pk="id" query="select id, name, concat_ws(',',
> cast(lat as char), cast(lng as char)) as latlng from practice "></entity>
Eric
