OrientDB中布尔类型的最佳索引选择

Question

I'm setting a flag on my records to see which ones have already been processed by my import script, and am wondering what type of index I should use. My thought is to use NOTUNIQUE_HASH_INDEX . Is that best?

Answer 1

Depends by what you need. All *_HASH_INDEX types are super fast but don't allow range queries like:

select from Invoice where date between '2014-01-01 00:00:00.000' and 
                                       '2014-12-31 00:00:00.000'

While classic index (sb-tree) can do it. About UNIQUE and NOT-UNIQUE depends if you can have duplication against the indexed fields. Like RDBMS.