数据已建立索引后如何更改Solr字段类型

Question

I had indexed a lot of data to solr . One field named id is indexed as multivalued and string type (id:["123"]) .

Now I want to change the field to int ie (id:123) .

Can I change the field type and how to effects the already existing data?

Answer 1

Yes, you can change the field type and also the multivalued as false by modifying the field from the schema.xml or managed-schema.

Once you modify the field type of field, you need to reindex the data.

I would suggest to create another collection using modified/different configset . This modified configset will have all the required changes to your schema.xml.

Once you upload this configSet , create a new collection and start indexing the data in your new collection.

Once indexing is complete. You can create an alias to the new collection and provide the alias name same as earlier collection, in order to avoid the downtime.

After the alias creation whatever searches will happen will be executed on the new collection.