using pre-core properties in dih config

[Robert Stewart]

I have a multi-core setup, and for each core I have a shared
data-config.xml which specifies a SQL query for data import.  What I
want to do is have the same data-config.xml file shared between my
cores (linked to same physical file). I'd like to specify core
properties in solr.xml such that each core loads a different set of
data from SQL.  So my query might look like this:

query="select * from index_values where mod(index_id,${NUM_CORES})=${CORE_ID}"

So I want to have NUM_CORES and CORE_ID specified as properties in
solr.xml, something like:

<solr ...>
  <cores ..>
     <property name="NUM_CORES" value="3"/>
     <core name="index0" ...>
        <property name="CORE_ID" value="0"/>
     </core>
     <core name="index1" ...>
        <property name="CORE_ID" value="1"/>
     </core>
     <core name="index2" ...>
        <property name="CORE_ID" value="2"/>
     </core>
  </cores>

</solr>

So my question is, is this possible, and if so what is exact syntax to
make it work?

Thanks,
Bob