Custom nodetype index

[Roy Teeuwen]

Hey,

I would like to add a custom nodetype / mixintype to be indexed. I have seen 
there is a nodetype index, but I don't want to change the OOTB one because this 
would be hard to maintain.

I have found the following page but this actually makes it even worse:

https://jackrabbit.apache.org/oak/docs/query/ootb-index-change.html

This would mean that when we do an upgrade of our product, we would have to 
keep in mind that the upgraded nodetype index has to be taken into account to 
make a new custom nodetype index.

What is the reason that you cant just make a second nodetype index that adds to 
the OOTB one, or is there a workaround to make it work? For example:

<?xml version="1.0" encoding="UTF-8"?>
<jcr:root xmlns:oak="http://jackrabbit.apache.org/oak/ns/1.0"; 
xmlns:jcr="http://www.jcp.org/jcr/1.0";
          jcr:primaryType="oak:QueryIndexDefinition"
          type="property"
          propertyNames="{Name}[jcr:mixinTypes]"
          declaringNodeTypes="{Name}[mix:customMixin]"
          nodeTypeListDefined="{Boolean}true"
          async="async"
          forceReindex="{Boolean}true"/>

Thanks!
Roy