Question

I am using External File field in solr for my frequently updated types of data. I had created a file _external_<myfieldTypename> in my Index directory. And my data is like :

4950 = 150.0
4951 = 65.0
4952 = 789.0
4953 = 786.0
4954 = 5.0
4955 = 21.0

Now I had created new field as:

<fieldType name="<myfieldTypename>" class="solr.ExternalFileField" keyField="Name" defVal="1" indexed="false" stored="false" valType="float"/>

<field name="MyFieldName" type="<myfieldTypename>" indexed="true" stored="true"/>

My question is that how can I read data from my external file?

Thanks in advance.

Answer 1

Documentation :-

Solr looks for the external file in the index directory under the name
of external_<fieldname> or external_<fieldname>.*

So in your case the external field file name should be MyFieldName.txt or external_MyFieldName.txt with the data.

External fields are not searchable. They can be used only for function
queries or display.