diff --git a/src/backend/catalog/system_views.sql b/src/backend/catalog/system_views.sql
index d406ea8118c..2bd5f5ea14a 100644
--- a/src/backend/catalog/system_views.sql
+++ b/src/backend/catalog/system_views.sql
@@ -642,16 +642,16 @@ CREATE VIEW pg_statio_all_tables AS
             pg_stat_get_blocks_fetched(T.oid) -
                     pg_stat_get_blocks_hit(T.oid) AS toast_blks_read,
             pg_stat_get_blocks_hit(T.oid) AS toast_blks_hit,
-            sum(pg_stat_get_blocks_fetched(X.indexrelid) -
-                    pg_stat_get_blocks_hit(X.indexrelid))::bigint AS tidx_blks_read,
-            sum(pg_stat_get_blocks_hit(X.indexrelid))::bigint AS tidx_blks_hit
+            pg_stat_get_blocks_fetched(X.indexrelid) -
+                    pg_stat_get_blocks_hit(X.indexrelid) AS tidx_blks_read,
+            pg_stat_get_blocks_hit(X.indexrelid) AS tidx_blks_hit
     FROM pg_class C LEFT JOIN
             pg_index I ON C.oid = I.indrelid LEFT JOIN
             pg_class T ON C.reltoastrelid = T.oid LEFT JOIN
             pg_index X ON T.oid = X.indrelid
             LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace)
     WHERE C.relkind IN ('r', 't', 'm')
-    GROUP BY C.oid, N.nspname, C.relname, T.oid, X.indrelid;
+    GROUP BY C.oid, N.nspname, C.relname, T.oid, X.indexrelid;
 
 CREATE VIEW pg_statio_sys_tables AS
     SELECT * FROM pg_statio_all_tables
diff --git a/src/test/regress/expected/rules.out b/src/test/regress/expected/rules.out
index ac31840739d..8876025aaa7 100644
--- a/src/test/regress/expected/rules.out
+++ b/src/test/regress/expected/rules.out
@@ -2216,15 +2216,15 @@ pg_statio_all_tables| SELECT c.oid AS relid,
     (sum(pg_stat_get_blocks_hit(i.indexrelid)))::bigint AS idx_blks_hit,
     (pg_stat_get_blocks_fetched(t.oid) - pg_stat_get_blocks_hit(t.oid)) AS toast_blks_read,
     pg_stat_get_blocks_hit(t.oid) AS toast_blks_hit,
-    (sum((pg_stat_get_blocks_fetched(x.indexrelid) - pg_stat_get_blocks_hit(x.indexrelid))))::bigint AS tidx_blks_read,
-    (sum(pg_stat_get_blocks_hit(x.indexrelid)))::bigint AS tidx_blks_hit
+    (pg_stat_get_blocks_fetched(x.indexrelid) - pg_stat_get_blocks_hit(x.indexrelid)) AS tidx_blks_read,
+    pg_stat_get_blocks_hit(x.indexrelid) AS tidx_blks_hit
    FROM ((((pg_class c
      LEFT JOIN pg_index i ON ((c.oid = i.indrelid)))
      LEFT JOIN pg_class t ON ((c.reltoastrelid = t.oid)))
      LEFT JOIN pg_index x ON ((t.oid = x.indrelid)))
      LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace)))
   WHERE (c.relkind = ANY (ARRAY['r'::"char", 't'::"char", 'm'::"char"]))
-  GROUP BY c.oid, n.nspname, c.relname, t.oid, x.indrelid;
+  GROUP BY c.oid, n.nspname, c.relname, t.oid, x.indexrelid;
 pg_statio_sys_indexes| SELECT pg_statio_all_indexes.relid,
     pg_statio_all_indexes.indexrelid,
     pg_statio_all_indexes.schemaname,