plan: only plans that have apply will add cache. (#2564)
plan: only plans that have apply will add cache. (#2564)


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