diff --git a/dhp-workflows/dhp-stats-update/src/main/resources/eu/dnetlib/dhp/oa/graph/stats/oozie_app/scripts/step16.sql b/dhp-workflows/dhp-stats-update/src/main/resources/eu/dnetlib/dhp/oa/graph/stats/oozie_app/scripts/step16.sql
index 3d21a9d68..33849b960 100644
--- a/dhp-workflows/dhp-stats-update/src/main/resources/eu/dnetlib/dhp/oa/graph/stats/oozie_app/scripts/step16.sql
+++ b/dhp-workflows/dhp-stats-update/src/main/resources/eu/dnetlib/dhp/oa/graph/stats/oozie_app/scripts/step16.sql
@@ -1,19 +1,7 @@
 ----------------------------------------------------
 -- Shortcuts for various definitions in stats db ---
--- since these statements are executed using Impala,
--- we'll have to compute the stats for the tables we use
 ----------------------------------------------------
 
-COMPUTE STATS result;
-COMPUTE STATS result_sources;
-COMPUTE STATS datasource;
-COMPUTE STATS result_datasources;
-COMPUTE STATS datasource_sources;
-COMPUTE STATS country;
-COMPUTE STATS result_organization;
-COMPUTE STATS organization;
-COMPUTE STATS datasource_organizations;
-
 -- Peer reviewed:
 -- Results that have been collected from Crossref
 create table ${stats_db_name}.result_peerreviewed as
@@ -28,9 +16,8 @@ from peer_reviewed
 union all
 select distinct r.id as id, false as peer_reviewed
 from ${stats_db_name}.result r
-where r.id not in (select id from peer_reviewed);
-
-COMPUTE STATS result_peerreviewed;
+left outer join peer_reviewed pr on pr.id=r.id
+where pr.id is null;
 
 -- Green OA:
 -- OA results that are hosted by an Institutional repository and have NOT been harvested from a DOAJ journal.
@@ -40,20 +27,21 @@ with result_green as (
     from ${stats_db_name}.result r
     join ${stats_db_name}.result_datasources rd on rd.id=r.id
     join ${stats_db_name}.datasource d on d.id=rd.datasource
-    where r.bestlicence in ('Open Access', 'Open Source') and d.type='Institutional Repository' and not exists (
-        select 1 from ${stats_db_name}.result_datasources rd
+    left outer join (
+        select rd.id from ${stats_db_name}.result_datasources rd
         join ${stats_db_name}.datasource d on rd.datasource=d.id
         join ${stats_db_name}.datasource_sources sds on sds.id=d.id
         join ${stats_db_name}.datasource sd on sd.id=sds.datasource
-        where sd.name='DOAJ-ARTICLES' and rd.id=r.id))
+        where sd.name='DOAJ-ARTICLES'
+    ) as doaj on doaj.id=r.id
+    where r.bestlicence in ('Open Access', 'Open Source') and d.type='Institutional Repository' and doaj.id is null)
 select distinct result_green.id, true as green
 from result_green
 union all
 select distinct r.id as id, false as green
 from ${stats_db_name}.result r
-where r.id not in (select id from result_green);
-
-COMPUTE STATS result_greenoa;
+left outer join result_green rg on rg.id=r.id
+where rg.id  is null;
 
 -- GOLD OA:
 -- OA results that have been harvested from a DOAJ journal.
@@ -73,8 +61,6 @@ select distinct r.id, false as gold
 from ${stats_db_name}.result r
 where r.id not in (select id from result_gold);
 
-COMPUTE STATS result_gold;
-
 -- shortcut result-country through the organization affiliation
 create table ${stats_db_name}.result_affiliated_country as
 select r.id as id, o.country as country
@@ -83,8 +69,6 @@ join ${stats_db_name}.result_organization ro on ro.id=r.id
 join ${stats_db_name}.organization o on o.id=ro.organization
 where o.country is not null and o.country!='';
 
-COMPUTE STATS result_affiliated_country;
-
 -- shortcut result-country through datasource of deposition
 create table ${stats_db_name}.result_deposited_country as
 select r.id as id, o.country as country
@@ -93,6 +77,4 @@ join ${stats_db_name}.result_datasources rd on rd.id=r.id
 join ${stats_db_name}.datasource d on d.id=rd.datasource
 join ${stats_db_name}.datasource_organizations dor on dor.id=d.id
 join ${stats_db_name}.organization o on o.id=dor.organization
-where o.country is not null and o.country!='';
-
-COMPUTE STATS result_deposited_country;
\ No newline at end of file
+where o.country is not null and o.country!='';
\ No newline at end of file
diff --git a/dhp-workflows/dhp-stats-update/src/main/resources/eu/dnetlib/dhp/oa/graph/stats/oozie_app/workflow.xml b/dhp-workflows/dhp-stats-update/src/main/resources/eu/dnetlib/dhp/oa/graph/stats/oozie_app/workflow.xml
index 296241569..174d78901 100644
--- a/dhp-workflows/dhp-stats-update/src/main/resources/eu/dnetlib/dhp/oa/graph/stats/oozie_app/workflow.xml
+++ b/dhp-workflows/dhp-stats-update/src/main/resources/eu/dnetlib/dhp/oa/graph/stats/oozie_app/workflow.xml
@@ -215,31 +215,17 @@
 			<param>stats_db_name=${stats_db_name}</param>
 			<param>openaire_db_name=${openaire_db_name}</param>
         </hive2>
-        <ok to="Step15_5"/>
-        <error to="Kill"/>
-    </action>
-
-    <action name="Step15_5">
-        <hive2 xmlns="uri:oozie:hive2-action:0.1">
-            <jdbc-url>${hive_jdbc_url}</jdbc-url>
-            <script>scripts/step15_5.sql</script>
-            <param>stats_db_name=${stats_db_name}</param>
-            <param>openaire_db_name=${openaire_db_name}</param>
-        </hive2>
         <ok to="Step16"/>
         <error to="Kill"/>
     </action>
 
     <action name="Step16">
-        <shell xmlns="uri:oozie:shell-action:0.1">
-            <job-tracker>${jobTracker}</job-tracker>
-            <name-node>${nameNode}</name-node>
-            <exec>impala-shell.sh</exec>
-            <argument>${stats_db_name}</argument>
-            <argument>step16.sql</argument>
-            <argument>/user/${wf:user()}/oa/graph/stats/oozie_app/scripts/step16.sql</argument>
-            <file>impala-shell.sh</file>
-        </shell>
+        <hive2 xmlns="uri:oozie:hive2-action:0.1">
+            <jdbc-url>${hive_jdbc_url}</jdbc-url>
+            <script>scripts/step16.sql</script>
+            <param>stats_db_name=${stats_db_name}</param>
+            <param>openaire_db_name=${openaire_db_name}</param>
+        </hive2>
         <ok to="Step16_5"/>
         <error to="Kill"/>
     </action>