util/codec: encode int64 to varint if not comparable (#1448)
util/codec: encode int64 to varint if not comparable (#1448)


Nify/tidb,coocood/tidb,louishust/tidb,CodeRushing/tidb,louishust/tidb,anywhy/tidb,ngaut/tidb,8cbx/tidb,liyu4/tidb,mccxj/tidb,kyle-wang/tidb,zs634134578/tidb,8cbx/tidb,qhsong/tidb,c4pt0r/tidb,JinheLin/tidb,pingcap/tidb,ming-relax/tidb,c4pt0r/tidb,qiuyesuifeng/tidb,XuHuaiyu/tidb,yangwenmai/tidb,gaocegege/tidb,c4pt0r/tidb,astaxie/tidb,CodeRushing/tidb,spongedu/tidb,c4pt0r/tidb,coocood/tidb,pingcap/tidb,pingcap/tidb,XuHuaiyu/tidb,pingcap/tidb,EvilMcJerkface/tidb,yangwenmai/tidb,zimulala/tidb,mccxj/tidb,ngaut/tidb,Cofyc/tidb,c4pt0r/tidb,myrice/tidb,kyle-wang/tidb,kyle-wang/tidb,wusphinx/tidb,yuanwhy/tidb,pingcap/tidb,anywhy/tidb,wusphinx/tidb,Nify/tidb,JinheLin/tidb,andelf/tidb,silentred/tidb,liyu4/tidb,myrice/tidb,kyle-wang/tidb,zs634134578/tidb,qhsong/tidb,pingcap/tidb,qiuyesuifeng/tidb,Cofyc/tidb,tiancaiamao/tidb,kyle-wang/tidb,tiancaiamao/tidb,c4pt0r/tidb,ming-relax/tidb,cosmtrek/tidb,EvilMcJerkface/tidb,ngaut/tidb,ngaut/tidb,zimulala/tidb,yuanwhy/tidb,simon-xia/tidb,kyle-wang/tidb,andelf/tidb,ueizhou/tidb,silentred/tidb,cosmtrek/tidb,silenceper/tidb,ueizhou/tidb,ngaut/tidb,astaxie/tidb,silenceper/tidb,simon-xia/tidb,ngaut/tidb,gaocegege/tidb,spongedu/tidb