Add aggregated stat for testing

Also change aggregated stats to not filter a single tile

lib/cartodb/backends/layer-stats/mapnik-layer-stats.js

@@ -4,7 +4,7 @@ const AggregationMapConfig = require('../../models/aggregation/aggregation-mapco
 var SubstitutionTokens = require('../../utils/substitution-tokens');
 
 // Instantiate a query with tokens for a given zoom level
-function queryForZoom(sql, zoom) {
+function queryForZoom(sql, zoom, singleTile=false) {
     const tileRes = 256;
     const wmSize = 6378137.0*2*Math.PI;
     const nTiles = Math.pow(2, zoom);
@@ -12,8 +12,12 @@ function queryForZoom(sql, zoom) {
     const resolution = tileSize / tileRes;
     const scaleDenominator = resolution / 0.00028;
     const x0 = -wmSize/2, y0 = -wmSize/2;
+    let bbox = `ST_MakeEnvelope(${x0}, ${y0}, ${x0+wmSize}, ${y0+wmSize})`;
+    if (singleTile) {
+        bbox = `ST_MakeEnvelope(${x0}, ${y0}, ${x0 + tileSize}, ${y0 + tileSize})`;
+    }
     return SubstitutionTokens.replace(sql, {
-        bbox: `ST_MakeEnvelope(${x0}, ${y0}, ${x0 + tileSize}, ${y0 + tileSize})`,
+        bbox: bbox,
         scale_denominator: scaleDenominator,
         pixel_width: resolution,
         pixel_height: resolution
@@ -116,6 +120,17 @@ function firstPhaseQueries(queries, ctx) {
         );
     }
 
+    // aggrFeatureCount
+    if (ctx.metaOptions.hasOwnProperty('aggrFeatureCount')) {
+        addStat(
+            queries,
+            ctx,
+            'post', ctx.metaOptions.aggrFeatureCount || 0,
+            queryUtils.getQueryActualRowCount,
+            res => queries.results.aggrfeatureCount = res.rows[0].rows
+        );
+    }
+
     // geometryType
     if (ctx.metaOptions.geometryType && queries.results.geometryType === undefined) {
         const geometryColumn = AggregationMapConfig.getAggregationGeometryColumn();