diff --git a/greenmine/projects/aggregates/filters.py b/greenmine/projects/aggregates/filters.py
new file mode 100644
index 00000000..56188c25
--- /dev/null
+++ b/greenmine/projects/aggregates/filters.py
@@ -0,0 +1,138 @@
+# -*- coding: utf-8 -*-
+
+from contextlib import closing
+from django.db import connection
+
+
+def _get_issues_tags(project):
+    extra_sql = ("select unnest(unpickle(tags)) as tagname, count(unnest(unpickle(tags))) "
+                 "from issues_issue where project_id = %s "
+                 "group by unnest(unpickle(tags)) "
+                 "order by tagname asc")
+
+    with closing(connection.cursor()) as cursor:
+        cursor.execute(extra_sql, [project.id])
+        rows = cursor.fetchall()
+
+    return dict(rows)
+
+def _get_issues_statuses(project):
+    extra_sql = ("select status_id, count(status_id) from issues_issue "
+                 "where project_id = %s group by status_id;")
+
+    extra_sql = """
+    select id, (select count(*) from issues_issue
+                    where project_id = m.project_id and status_id = m.id)
+        from projects_issuestatus as m
+        where project_id = %s;
+    """
+
+    with closing(connection.cursor()) as cursor:
+        cursor.execute(extra_sql, [project.id])
+        rows = cursor.fetchall()
+
+    return dict(rows)
+
+
+def _get_issues_priorities(project):
+    extra_sql = """
+    select id, (select count(*) from issues_issue
+                where project_id = m.project_id and priority_id = m.id)
+        from projects_priority as m
+        where project_id = %s;
+    """
+
+    with closing(connection.cursor()) as cursor:
+        cursor.execute(extra_sql, [project.id])
+        rows = cursor.fetchall()
+
+    return dict(rows)
+
+
+def _get_issues_types(project):
+    extra_sql = """
+    select id, (select count(*) from issues_issue
+                where project_id = m.project_id and type_id = m.id)
+        from projects_issuetype as m
+        where project_id = %s;
+    """
+
+    with closing(connection.cursor()) as cursor:
+        cursor.execute(extra_sql, [project.id])
+        rows = cursor.fetchall()
+
+    return dict(rows)
+
+
+def _get_issues_severities(project):
+    extra_sql = """
+    select id, (select count(*) from issues_issue
+                where project_id = m.project_id and severity_id = m.id)
+        from projects_severity as m
+        where project_id = %s;
+    """
+
+    with closing(connection.cursor()) as cursor:
+        cursor.execute(extra_sql, [project.id])
+        rows = cursor.fetchall()
+
+    return dict(rows)
+
+
+def _get_issues_assigned_to(project):
+    extra_sql = """
+    select user_id, (select count(*) from issues_issue
+                        where project_id = pm.project_id and assigned_to_id = pm.user_id)
+        from projects_membership as pm
+        where project_id = %s;
+    """
+
+    with closing(connection.cursor()) as cursor:
+        cursor.execute(extra_sql, [project.id])
+        rows = cursor.fetchall()
+
+    return dict(rows)
+
+
+def _get_issues_owners(project):
+    extra_sql = """
+    select user_id, (select count(*) from issues_issue
+                        where project_id = pm.project_id and owner_id = pm.user_id)
+        from projects_membership as pm
+        where project_id = %s;
+    """
+
+    with closing(connection.cursor()) as cursor:
+        cursor.execute(extra_sql, [project.id])
+        rows = cursor.fetchall()
+
+    return dict(rows)
+
+
+def _get_issues_created_by(project):
+    extra_sql = """
+    select user_id, (select count(*) from issues_issue
+                        where project_id = pm.project_id and owner_id = pm.user_id)
+        from projects_membership as pm
+        where project_id = %s;
+    """
+
+    with closing(connection.cursor()) as cursor:
+        cursor.execute(extra_sql, [project.id])
+        rows = cursor.fetchall()
+
+    return dict(rows)
+
+
+def get_issues_filters_data(project):
+    data = {
+        "owners": _get_issues_owners(project),
+        "tags": _get_issues_tags(project),
+        "statuses": _get_issues_statuses(project),
+        "priorities": _get_issues_priorities(project),
+        "assigned_to": _get_issues_assigned_to(project),
+        "created_by": _get_issues_created_by(project),
+        "types": _get_issues_types(project),
+        "severities": _get_issues_severities(project),
+    }
+    return data
diff --git a/greenmine/projects/api.py b/greenmine/projects/api.py
index ff733f68..b0cffa46 100644
--- a/greenmine/projects/api.py
+++ b/greenmine/projects/api.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 
-from django.db.models import Q, Count
-from django.shortcuts import get_object_or_404
+from django.db.models import Q
 
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.response import Response
@@ -14,7 +13,9 @@ from greenmine.base.notifications.api import NotificationSenderMixin
 from . import serializers
 from . import models
 from . import permissions
+
 from .aggregates import stats
+from .aggregates import filters as filters_aggr
 
 
 class ProjectViewSet(ModelCrudViewSet):
@@ -33,6 +34,11 @@ class ProjectViewSet(ModelCrudViewSet):
         project = self.get_object()
         return Response(stats.get_stats_for_project_issues(project))
 
+    @detail_route(methods=['get'])
+    def issue_filters_data(self, request, pk=None):
+        project = self.get_object()
+        return Response(filters_aggr.get_issues_filters_data(project))
+
     def get_queryset(self):
         qs = super(ProjectViewSet, self).get_queryset()
         qs = qs.filter(Q(owner=self.request.user) |
diff --git a/greenmine/projects/issues/api.py b/greenmine/projects/issues/api.py
index 854275a8..42879e7b 100644
--- a/greenmine/projects/issues/api.py
+++ b/greenmine/projects/issues/api.py
@@ -1,8 +1,12 @@
 # -*- coding: utf-8 -*-
 
+import reversion
 from django.contrib.contenttypes.models import ContentType
 
 from rest_framework.permissions import IsAuthenticated
+from rest_framework.decorators import list_route
+from rest_framework.response import Response
+from rest_framework import status
 
 from greenmine.base import filters
 from greenmine.base import exceptions as exc
@@ -16,8 +20,6 @@ from . import models
 from . import permissions
 from . import serializers
 
-import reversion
-
 
 class IssueAttachmentViewSet(ModelCrudViewSet):
     model = Attachment
@@ -90,3 +92,4 @@ class IssueViewSet(NotificationSenderMixin, ModelCrudViewSet):
                 # Update the comment in the last version
                 reversion.set_comment(self.request.DATA["comment"])
         super().post_save(obj, created)
+
diff --git a/greenmine/projects/models.py b/greenmine/projects/models.py
index 6598f9af..2a40a444 100644
--- a/greenmine/projects/models.py
+++ b/greenmine/projects/models.py
@@ -161,10 +161,6 @@ class Project(models.Model):
         role_model = get_model("users", "Role")
         return role_model.objects.all()
 
-        # TODO: do not remove this
-        # return role_model.objects.filter(id__in=list(self.memberships.values_list(
-        #                                                          "role", flat=True)))
-
     def get_users(self):
         user_model = get_user_model()
         return user_model.objects.filter(
diff --git a/sql/tags.sql b/sql/tags.sql
index 368d0b28..4a40a38d 100644
--- a/sql/tags.sql
+++ b/sql/tags.sql
@@ -1,3 +1,5 @@
+CREATE INDEX issues_unpickle_tags_index ON issues_issue USING btree (unpickle(tags));
+
 CREATE OR REPLACE FUNCTION unpickle (data text)
   RETURNS text[]
 AS $$
@@ -7,18 +9,18 @@ AS $$
     return pickle.loads(base64.b64decode(data))
 $$ LANGUAGE plpythonu;
 
-CREATE OR REPLACE FUNCTION array_uniq_join (data text[], data2 text[])
-  RETURNS text[]
-AS $$
-    tmp = set(data)
-    tmp.update(data2)
-    return tuple(tmp)
-$$ LANGUAGE plpythonu;
-
-DROP AGGREGATE array_uniq_concat (text[]);
-CREATE AGGREGATE array_uniq_concat (text[])
-(
-    sfunc = array_uniq_join,
-    stype = text[],
-    initcond = '{}'
-);
+-- CREATE OR REPLACE FUNCTION array_uniq_join (data text[], data2 text[])
+--   RETURNS text[]
+-- AS $$
+--     tmp = set(data)
+--     tmp.update(data2)
+--     return tuple(tmp)
+-- $$ LANGUAGE plpythonu;
+--
+-- DROP AGGREGATE array_uniq_concat (text[]);
+-- CREATE AGGREGATE array_uniq_concat (text[])
+-- (
+--     sfunc = array_uniq_join,
+--     stype = text[],
+--     initcond = '{}'
+-- );