Select Solr Indexes and update them by Query

Question

I simple want to select numerous indexes and update their int values by Query for example, to delete an index we use a query below.

http://localhost:8983/solr/update?stream.body=
<delete><query>id:298253</query></delete>&commit=true

like above, I want to select indexes which contain int value(chid:128) and change their sectioncode to 2118.

the below is my current query first it selects chid and change their section code to 2118. but It didn't work.

http://localhost:8983/solr/new_core/update?stream.body=<query>chid:128</query>
<set>
<field name="sectioncode" >2118</field>
</set>&commit=true

please give me your kind advises

Answer 1

Atomic updates [1] should be a feature that sounds like what you need, but have a look at the description and see if that fits your needs.

[1] https://wiki.apache.org/solr/Atomic_Updates