如何修复 Postgres 9.1 中的输入超出范围错误

Question

在 Postgres 9.1 中，以下代码会产生错误

ERROR:  input is out of range
CONTEXT:  SQL function "gc_dist1" statement 1

如何在 9.1 中修复它？

create or replace function gc_dist1(_lat1 float8, _lon1 float8, _lat2 float8, _lon2 float8) 
returns float8 as $$ 
select ACOS(SIN(radians())*SIN(radians())+COS(radians())*COS(radians())*COS(radians()-radians()))*6371; 
$$ language sql immutable;

select gc_dist1(24.6269989013672,59.3357849157094,24.6269989013672,59.3357849121094);

Answer 1

如果失败，因为 acos() 函数不能接受大于 1 的值。在你的例子中就是这种情况。

SELECT  (
        SIN(radians(24.6269989013672))
        * SIN(radians(24.6269989013672))
        + COS(radians(24.6269989013672))
        * COS(radians(24.6269989013672))
        * COS(radians(59.3357849121094)-radians(59.3357849157094))
    ) > 1 -- true

看来你的功能逻辑不对

如何修复 Postgres 9.1 中的输入超出范围错误

How to fix input is out of range error in Postgres 9.1

sql

postgresql

plpgsql

radians

postgresql-9.1