=?gb2312?B?t7a5+sza?= <fanguoteng(at)highgo(dot)com> writes:
> I use a postgres extension plugin pg_strom to generate the plan. I select one column ¡°avg(c_acctbal)¡± in the SQL, and the generated plan changes to select two column ¡°c_acctbal, c_phone¡±.
I think you'd be better off doing that sort of thing in the rewriter
somewhere. Wherever you tried to put it in the planner is clearly
too late.
regards, tom lane