i'；我正在使用postgreSQL将long/lat转换为point，并希望与该点保持一致

我正在使用postgreSQL将long/lat转换为point，并希望与该点保持一致

select bs1.rental_shop_name,
    bs1.lon,
    bs1.lat,
    bs2.rental_shop_name,
    bs2.lon,
    bs2.lat,
    count(*),
    ST_MakeLine(ST_MakePoint(bs1.lon, bs1.lat), ST_MakePoint(bs2.lon, bs2.lat))
from bikeuser as bu
join bikestation as bs1 on bs1.rental_shop_code = bu.rental_shop_code
join bikestation as bs2 on bs2.rental_shop_code = bu.return_shop_code
group by bs1.rental_shop_name,
    bs1.lon,
    bs1.lat,
    bs2.rental_shop_name,
    bs2.lon,
    bs2.lat,
    ST_MakeLine(ST_MakePoint(bs1.lon, bs1.lat), ST_MakePoint(bs2.lon, bs2.lat))
order by count desc limit 40

但结果是失败的，消息是错误的

SQL状态：42883 st_生成点不存在，并且必须使用显式转换器

我也用这样的简单形式进行了测试

SELECT ST_MakePoint(-71.1043443253471, 42.3150676015829);

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但同样的结果

对于lat-long，仅使用ST_MakePoint是不够的。您还必须设置几何体的SRID。如果数据来自WGS84（通常是lat long的情况），则需要在几何体上应用ST_SetGrid

   ST_MakeLine(ST_SetSRID(ST_MakePoint(bs1.lon, bs1.lat),4326), ST_SetSRID(ST_MakePoint(bs2.lon, bs2.lat),4326))

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您应该考虑您自己的数据SRID。

ST_MakePoint不是标准的PostgreSQL函数，它是PostGIS的一部分，您安装了吗？