Question

我的代码中出现上述错误，表示＆＃39; while＆＃39;线。我试图在一些gis数据上找到一条线的交点数。我已经逐字复制了代码，postgis代码不应该影响问题。（如果我试图以一种非常愚蠢的方式做到这一点，请说。我只是一个初学者）

create or replace function border() returns table(x real, sum bigint) as $$
declare x real;
begin   
    x := -35.5724;
    while x > -36.4 do
        return query select x,sum(st_npoints(st_intersection(the_geom,st_setsrid(st_makeline(st_point(173.3,x),st_point(175,x)),4167)))) from auckland_numberlines;
        x := x - 0.1;
    end while
end
$$ language plpgsql;

Answer 1

 while x > -36.4 do
    return query select x,sum(st_npoints(st_intersection(the_geom,st_setsrid(st_makeline(st_point(173.3,x),st_point(175,x)),4167)))) from auckland_numberlines;
        x := x - 0.1;    
    end while

应该是

WHILE x > -36.4 LOOP
    return query select x,sum(st_npoints(st_intersection(the_geom,st_setsrid(st_makeline(st_point(173.3,x),st_point(175,x)),4167)))) from auckland_numberlines;
        x := x - 0.1;
END LOOP ;

错误：在SQL表达式结束时缺少“LOOP”

1 个答案: