coverity#735811 Dereference after null check

We always have a DB collection.

Change-Id: I8933be3a01b4c2e63b852361d5d2438e6fca4d05
coverity#735320 Unchecked return value

assert if fouled

Change-Id: I1bc38690c755b8bc6eab16c8aa33c8f568e0c854
coverity#735311 Unchecked return value

assert if fouled

Change-Id: Id3a160ff08907cc7792e93eea9f91997bcc0e2c3