fix clickhouse calls (#1536)

queries/analytics/pageview/getPageviewMetrics.js

@@ -43,7 +43,7 @@ async function clickhouseQuery(website_id, { startDate, endDate, column, filters
     `select ${column} x, count(*) y
     from event
     where website_id= $1
-      ${column !== 'event_name' ? `and event_name = ''` : ''}
+      ${column !== 'event_name' ? `and event_name = ''` : `and event_name != ''`}
       and ${getBetweenDates('created_at', startDate, endDate)}
       ${pageviewQuery}
       ${sessionQuery}

queries/analytics/pageview/getPageviewStats.js

@@ -59,10 +59,10 @@ async function clickhouseQuery(
     from
       (select 
         ${getDateQuery('created_at', unit, timezone)} t,
-        count(${count !== '*' ? 'session_uuid' : count}) y
+        count(${count !== '*' ? 'distinct session_uuid' : count}) y
       from event
-      where website_id= $1
-        
+      where event_name = ''
+        and website_id= $1        
         and ${getBetweenDates('created_at', start_at, end_at)}
         ${pageviewQuery}
         ${sessionQuery}

queries/analytics/pageview/getPageviews.js

@@ -33,7 +33,7 @@ async function clickhouseQuery(websites, start_at) {
         url
       from event
       where event_name = ''
-      and website_id in (${websites.join[',']}
-      and created_at >= ${clickhouse.getDateFormat(start_at)})`,
+      and ${websites && websites.length > 0 ? `website_id in (${websites.join(',')})` : '0 = 0'}
+      and created_at >= ${clickhouse.getDateFormat(start_at)}`,
   );
 }