fixed classmethod decorator missing bug reported by Rob Kirkpatrick for SQLSequence
fixed classmethod decorator missing bug reported by Rob Kirkpatrick for SQLSequence

cjlee112/pygr,ctb/pygr,theoryno3/pygr,GenDataPro/pygr,ctb/pygr,RitwikGupta/pygr,ctb/pygr,theoryno3/pygr,theoryno3/pygr,cjlee112/pygr,GenDataPro/pygr,cjlee112/pygr,RitwikGupta/pygr,ctb/pygr,RitwikGupta/pygr,cjlee112/pygr,ctb/pygr,GenDataPro/pygr