How to retrieve page ids based on type using FQL?

I want to retrieve page ids of all those pages whose type is Musician/Band. I tried to retrive it from page table as

SELECT page_id from page where type='MUSICIAN开发者_StackOverflow/BAND'

but it is not allowing that.Its giving error:

Your statement is not indexable. The WHERE clause must contain an indexable column.

How to go about this?

You simply cannot do that query. You need to include at least one of the indexable columns in your query (page_id or name).