in client/sql/dataframe.go [243:254]
func (df *dataFrameImpl) createPlan() *proto.Plan {
return &proto.Plan{
OpType: &proto.Plan_Root{
Root: &proto.Relation{
Common: &proto.RelationCommon{
PlanId: newPlanId(),
},
RelType: df.relation.RelType,
},
},
}
}