Use ST_DWithin()

lib/models/filter/circle.js

@@ -1,24 +1,16 @@
 'use strict';
 
 const debug = require('debug')('windshaft:filter:circle');
-function filterQueryTpl ({ sql, column, srid, lng, lat, radius } = {}) {
+function filterQueryTpl ({ sql, column, srid, lng, lat, radiusInMeters } = {}) {
     return `
         SELECT
             *
         FROM (${sql}) _cdb_circle_filter
         WHERE
-            ST_Intersects(
-                ${column},
-                ST_Transform(
-                    ST_Buffer(
-                        ST_Transform(
-                          ST_SetSRID(ST_Point(${lng},${lat}), 3857),
-                          4326
-                        )::geography,
-                        ${radius}
-                    )::geometry,
-                    ${srid}
-                )
+            ST_DWithin(
+                ${srid === 3857 ? `ST_Transform(${column}, 4326)::geography` : `${column}::geography`},
+                ST_SetSRID(ST_Point(${lng}, ${lat}), 4326)::geography,
+                ${radiusInMeters}
             )
     `;
 }
@@ -51,7 +43,7 @@ module.exports = class CircleFilter {
             srid: this.srid,
             lng: this.lng,
             lat: this.lat,
-            radius: this.radius
+            radiusInMeters: this.radius
         });
 
         debug(circleSql);