方案一
select Lon,Lat from pntsnew order by greatCircleDistance(Lon,Lat,-120.419219,34.889755999999998) limit 1
方案二
CREATE TABLE pntsnew ENGINE = MergeTree() order by (geohash,Lon,Lat) AS select geohashEncode(Lon, Lat,4) geohash, Lon,Lat from pnts
CREATE TABLE geohashP ENGINE = MergeTree() order by (geohash,lon,lat) AS select geohash,tupleElement(geohashDecode(geohash ),1) lon,tupleElement(geohashDecode(geohash ),2) lat from pntsnew group by geohash
select Lon,Lat from pntsnew where geohash in (select geohash from geohashP order by greatCircleDistance(lon,lat ,-120.419219,34.889755999999998) limit 1) order by greatCircleDistance(Lon,Lat ,-120.419219,34.889755999999998) limit 1
select geoToH3( toFloat64(Lon), toFloat64(Lat),3) geoh3,toFloat64(Lon) Lon, toFloat64(Lat) Lat,id from pnts group by geohash
CREATE TABLE pntsh3 ENGINE = MergeTree() order by (h3,Lon,Lat) AS select geoToH3(Lon, Lat,4) h3, Lon,Lat from pnts
方案三
CREATE TABLE pntsnew ENGINE = MergeTree() PARTITION BY (geohash) order by (geohash,Lon,Lat) AS select geohashEncode(Lon, Lat,3) geohash, Lon,Lat from pnts
CREATE TABLE geohashP ENGINE = MergeTree() order by (geohash,lon,lat) AS select geohash,tupleElement(geohashDecode(geohash ),1) lon,tupleElement(geohashDecode(geohash ),2) lat from pntsnew group by geohash
select Lon,Lat from pntsnew where geohash in (select geohash from geohashP order by greatCircleDistance(lon,lat ,-120.419219,34.889755999999998) limit 1) order by greatCircleDistance(Lon,Lat ,-120.419219,34.889755999999998) limit 1
