Added Start and Commit transaction command
Added Start and Commit transaction command


Former-commit-id: 058256393076aa1c6a1f666fd70d6257672a96f9
jessesleeping/iso_peloton,vittvolt/peloton,AngLi-Leon/peloton,wangziqi2016/peloton,yingjunwu/peloton,AllisonWang/peloton,AngLi-Leon/peloton,PauloAmora/peloton,vittvolt/15721-peloton,apavlo/peloton,vittvolt/peloton,eric-haibin-lin/peloton-1,AngLi-Leon/peloton,phisiart/peloton-p3,cmu-db/peloton,malin1993ml/peloton,prashasthip/peloton,vittvolt/peloton,wangziqi2016/peloton,wangziqi2016/peloton,prashasthip/peloton,wangziqi2016/peloton,prashasthip/peloton,ShuxinLin/peloton,apavlo/peloton,seojungmin/peloton,PauloAmora/peloton,AllisonWang/peloton,malin1993ml/peloton,seojungmin/peloton,cmu-db/peloton,seojungmin/peloton,AllisonWang/peloton,yingjunwu/peloton,cmu-db/peloton,seojungmin/peloton,eric-haibin-lin/peloton-1,vittvolt/15721-peloton,jessesleeping/iso_peloton,seojungmin/peloton,prashasthip/peloton,AngLi-Leon/peloton,wangziqi2016/peloton,seojungmin/peloton,PauloAmora/peloton,malin1993ml/peloton,jessesleeping/iso_peloton,jessesleeping/iso_peloton,malin1993ml/peloton,wangziqi2016/peloton,vittvolt/15721-peloton,yingjunwu/peloton,prashasthip/peloton,PauloAmora/peloton,apavlo/peloton,vittvolt/peloton,malin1993ml/peloton,yingjunwu/peloton,vittvolt/15721-peloton,eric-haibin-lin/peloton-1,yingjunwu/peloton,jessesleeping/iso_peloton,AllisonWang/peloton,prashasthip/peloton,eric-haibin-lin/peloton-1,ShuxinLin/peloton,malin1993ml/peloton,phisiart/peloton-p3,vittvolt/peloton,haojin2/peloton,phisiart/peloton-p3,eric-haibin-lin/peloton-1,cmu-db/peloton,PauloAmora/peloton,apavlo/peloton,jessesleeping/iso_peloton,phisiart/peloton-p3,vittvolt/peloton,yingjunwu/peloton,ShuxinLin/peloton,haojin2/peloton,phisiart/peloton-p3,eric-haibin-lin/peloton-1,vittvolt/15721-peloton,apavlo/peloton,AllisonWang/peloton,ShuxinLin/peloton,AngLi-Leon/peloton,ShuxinLin/peloton,AngLi-Leon/peloton,haojin2/peloton,haojin2/peloton,phisiart/peloton-p3,cmu-db/peloton,vittvolt/15721-peloton,cmu-db/peloton,haojin2/peloton,PauloAmora/peloton,AllisonWang/peloton,haojin2/peloton,jessesleeping/iso_peloton,apavlo/peloton,ShuxinLin/peloton