planner: fix unexpected bad plan when IndexJoin inner side estRow is 0. (#21084)
planner: fix unexpected bad plan when IndexJoin inner side estRow is 0. (#21084)

 
kyle-wang/tidb,kyle-wang/tidb,ngaut/tidb,ngaut/tidb,ngaut/tidb,c4pt0r/tidb,pingcap/tidb,pingcap/tidb,ngaut/tidb,pingcap/tidb,ngaut/tidb,coocood/tidb,c4pt0r/tidb,c4pt0r/tidb,kyle-wang/tidb,kyle-wang/tidb,kyle-wang/tidb,pingcap/tidb,c4pt0r/tidb,c4pt0r/tidb,pingcap/tidb,kyle-wang/tidb,c4pt0r/tidb,pingcap/tidb,ngaut/tidb,coocood/tidb