Use template string for dateOverrideBasicsQueryTpl

lib/cartodb/models/dataview/histogram.js

@@ -210,25 +210,25 @@ const dateBasicsQueryTpl = ctx => `
     )
 `;
 
-var dateOverrideBasicsQueryTpl = dot.template([
-    '__cdb_basics AS (',
-    '    SELECT',
-    '        max({{=it._end}}) AS __cdb_max_val,',
-    '        min({{=it._start}}) AS __cdb_min_val,',
-    '        avg(date_part(\'epoch\', {{=it._column}})) AS __cdb_avg_val,',
-    '        min(',
-    '           date_trunc(',
-    '               \'{{=it._aggregation}}\',',
-    '               TO_TIMESTAMP({{=it._start}})::timestamp AT TIME ZONE \'{{=it._offset}}\'',
-    '           )',
-    '        ) AS __cdb_start_date,',
-    '        max(',
-    '           TO_TIMESTAMP({{=it._end}})::timestamp AT TIME ZONE \'{{=it._offset}}\'',
-    '        ) AS __cdb_end_date,',
-    '        count(1) AS __cdb_total_rows',
-    '    FROM ({{=it._query}}) __cdb_basics_query',
-    ')'
-].join(' \n'));
+const dateOverrideBasicsQueryTpl = ctx => `
+    __cdb_basics AS (
+        SELECT
+            max(${ctx._end}) AS __cdb_max_val,
+            min(${ctx._start}) AS __cdb_min_val,
+            avg(date_part('epoch', ${ctx._column})) AS __cdb_avg_val,
+            min(
+                date_trunc(
+                    '${ctx._aggregation}',
+                    TO_TIMESTAMP(${ctx._start})::timestamp AT TIME ZONE '${ctx._offset}'
+                )
+            ) AS __cdb_start_date,
+            max(
+                TO_TIMESTAMP(${ctx._end})::timestamp AT TIME ZONE '${ctx._offset}'
+            ) AS __cdb_end_date,
+            count(1) AS __cdb_total_rows
+        FROM (${ctx._query}) __cdb_basics_query
+    )
+`;
 
 var dateBinsQueryTpl = dot.template([
     '__cdb_bins AS (',