Use hash index to support some query

From: Jack Chan <chensi_04@xxxxxxx>
To: mongodb-user <mongodb-user@xxxxxxxxxxxxxxxx>
Date: Thu, 12 May 2016 02:04:02 -0700 (PDT)
Why ads?


since
{"a":"hashed"}

index has created, query such as
{ HASH(a) > low }

is needed to support,

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Why ads?