tidb_test: add where like test.
tidb_test: add where like test.

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