Question

我正在编写一个搜索客户端，以查询postgis db。

搜索查询将是，

    SELECT tags->'name' AS name,ST_Transform(way,4326) AS pt_lonlattext 
FROM planet_osm_point WHERE lower(tags->'name') LIKE '%school%'

现在，我需要的结果是，

完全匹配的结果应优先于部分匹配的结果。例如名单中只有“学校”的结果应该在返回的列表中首先显示，然后是“小学”，“高中”等的结果。

有没有办法重新构建上述查询以获得所需的结果？

Answer 1

这样的事情？

select
    tags->'name' as name,
    ST_Transform(way,4326) as pt_lonlattext 
from planet_osm_point
where lower(tags->'name') LIKE '%school%'
order by case when lower(tags->'name') = 'school' then 0 else 1 end

或更多DRY版本：

with cte as (
    select
        tags->'name' as name,
        ST_Transform(way,4326) as pt_lonlattext 
    from planet_osm_point
)
select name, pt_lonlattext 
from cte
where lower(name) like '%school%'
order by case when lower(name) = 'school' then 0 else 1 end

PostGis对hstore标签的搜索查询

1 个答案: