6 files changed, 60 insertions, 3 deletions
diff --git a/src/test/regress/expected/aggregates.out b/src/test/regress/expected/aggregates.out
index 1f1ce2380af..7319945ffe3 100644
--- a/src/test/regress/expected/aggregates.out
+++ b/src/test/regress/expected/aggregates.out
@@ -680,6 +680,25 @@ SELECT sum2(q1,q2) FROM int8_tbl;
  18271560493827981
 (1 row)
 
+-- sanity checks
+SELECT sum(q1+q2), sum(q1)+sum(q2) FROM int8_tbl;
+        sum        |     ?column?      
+-------------------+-------------------
+ 18271560493827981 | 18271560493827981
+(1 row)
+
+SELECT sum(q1-q2), sum(q2-q1), sum(q1)-sum(q2) FROM int8_tbl;
+       sum        |        sum        |     ?column?     
+------------------+-------------------+------------------
+ 9135780246913245 | -9135780246913245 | 9135780246913245
+(1 row)
+
+SELECT sum(q1*2000), sum(-q1*2000), 2000*sum(q1) FROM int8_tbl;
+         sum          |          sum          |       ?column?       
+----------------------+-----------------------+----------------------
+ 27407340740741226000 | -27407340740741226000 | 27407340740741226000
+(1 row)
+
 -- test for outer-level aggregates
 -- this should work
 select ten, sum(distinct four) from onek a
diff --git a/src/test/regress/expected/timestamp.out b/src/test/regress/expected/timestamp.out
index 6aaa19c8f4e..14a9f5b56a6 100644
--- a/src/test/regress/expected/timestamp.out
+++ b/src/test/regress/expected/timestamp.out
@@ -591,6 +591,16 @@ SELECT date_trunc( 'week', timestamp '2004-02-29 15:44:17.71393' ) AS week_trunc
  Mon Feb 23 00:00:00 2004
 (1 row)
 
+SELECT date_trunc( 'week', timestamp 'infinity' ) AS inf_trunc;
+ inf_trunc 
+-----------
+ infinity
+(1 row)
+
+SELECT date_trunc( 'timezone', timestamp '2004-02-29 15:44:17.71393' ) AS notsupp_trunc;
+ERROR:  unit "timezone" not supported for type timestamp without time zone
+SELECT date_trunc( 'timezone', timestamp 'infinity' ) AS notsupp_inf_trunc;
+ERROR:  unit "timezone" not supported for type timestamp without time zone
 SELECT date_trunc( 'ago', timestamp 'infinity' ) AS invalid_trunc;
 ERROR:  unit "ago" not recognized for type timestamp without time zone
 -- verify date_bin behaves the same as date_trunc for relevant intervals
diff --git a/src/test/regress/expected/timestamptz.out b/src/test/regress/expected/timestamptz.out
index 2a69953ff25..5dc8a621f6c 100644
--- a/src/test/regress/expected/timestamptz.out
+++ b/src/test/regress/expected/timestamptz.out
@@ -760,6 +760,16 @@ SELECT date_trunc( 'week', timestamp with time zone '2004-02-29 15:44:17.71393'
  Mon Feb 23 00:00:00 2004 PST
 (1 row)
 
+SELECT date_trunc( 'week', timestamp with time zone 'infinity' ) AS inf_trunc;
+ inf_trunc 
+-----------
+ infinity
+(1 row)
+
+SELECT date_trunc( 'timezone', timestamp with time zone '2004-02-29 15:44:17.71393' ) AS notsupp_trunc;
+ERROR:  unit "timezone" not supported for type timestamp with time zone
+SELECT date_trunc( 'timezone', timestamp with time zone 'infinity' ) AS notsupp_inf_trunc;
+ERROR:  unit "timezone" not supported for type timestamp with time zone
 SELECT date_trunc( 'ago', timestamp with time zone 'infinity' ) AS invalid_trunc;
 ERROR:  unit "ago" not recognized for type timestamp with time zone
 SELECT date_trunc('day', timestamp with time zone '2001-02-16 20:38:40+00', 'Australia/Sydney') as sydney_trunc;  -- zone name
@@ -780,6 +790,14 @@ SELECT date_trunc('day', timestamp with time zone '2001-02-16 20:38:40+00', 'VET
  Thu Feb 15 20:00:00 2001 PST
 (1 row)
 
+SELECT date_trunc('timezone', timestamp with time zone 'infinity', 'GMT') AS notsupp_zone_trunc;
+ERROR:  unit "timezone" not supported for type timestamp with time zone
+SELECT date_trunc( 'week', timestamp with time zone 'infinity', 'GMT') AS inf_zone_trunc;
+ inf_zone_trunc 
+----------------
+ infinity
+(1 row)
+
 SELECT date_trunc('ago', timestamp with time zone 'infinity', 'GMT') AS invalid_zone_trunc;
 ERROR:  unit "ago" not recognized for type timestamp with time zone
 -- verify date_bin behaves the same as date_trunc for relevant intervals
diff --git a/src/test/regress/sql/aggregates.sql b/src/test/regress/sql/aggregates.sql
index 277b4b198cc..dde85d0dfb2 100644
--- a/src/test/regress/sql/aggregates.sql
+++ b/src/test/regress/sql/aggregates.sql
@@ -182,6 +182,11 @@ SELECT newcnt(*) AS cnt_1000 FROM onek;
 SELECT oldcnt(*) AS cnt_1000 FROM onek;
 SELECT sum2(q1,q2) FROM int8_tbl;
 
+-- sanity checks
+SELECT sum(q1+q2), sum(q1)+sum(q2) FROM int8_tbl;
+SELECT sum(q1-q2), sum(q2-q1), sum(q1)-sum(q2) FROM int8_tbl;
+SELECT sum(q1*2000), sum(-q1*2000), 2000*sum(q1) FROM int8_tbl;
+
 -- test for outer-level aggregates
 
 -- this should work
diff --git a/src/test/regress/sql/timestamp.sql b/src/test/regress/sql/timestamp.sql
index 55f80530ea0..313757ed041 100644
--- a/src/test/regress/sql/timestamp.sql
+++ b/src/test/regress/sql/timestamp.sql
@@ -175,7 +175,9 @@ SELECT d1 - timestamp without time zone '1997-01-02' AS diff
    FROM TIMESTAMP_TBL WHERE d1 BETWEEN '1902-01-01' AND '2038-01-01';
 
 SELECT date_trunc( 'week', timestamp '2004-02-29 15:44:17.71393' ) AS week_trunc;
-
+SELECT date_trunc( 'week', timestamp 'infinity' ) AS inf_trunc;
+SELECT date_trunc( 'timezone', timestamp '2004-02-29 15:44:17.71393' ) AS notsupp_trunc;
+SELECT date_trunc( 'timezone', timestamp 'infinity' ) AS notsupp_inf_trunc;
 SELECT date_trunc( 'ago', timestamp 'infinity' ) AS invalid_trunc;
 
 -- verify date_bin behaves the same as date_trunc for relevant intervals
diff --git a/src/test/regress/sql/timestamptz.sql b/src/test/regress/sql/timestamptz.sql
index caca3123f13..6ace851d169 100644
--- a/src/test/regress/sql/timestamptz.sql
+++ b/src/test/regress/sql/timestamptz.sql
@@ -217,15 +217,18 @@ SELECT d1 - timestamp with time zone '1997-01-02' AS diff
    FROM TIMESTAMPTZ_TBL WHERE d1 BETWEEN '1902-01-01' AND '2038-01-01';
 
 SELECT date_trunc( 'week', timestamp with time zone '2004-02-29 15:44:17.71393' ) AS week_trunc;
+SELECT date_trunc( 'week', timestamp with time zone 'infinity' ) AS inf_trunc;
+SELECT date_trunc( 'timezone', timestamp with time zone '2004-02-29 15:44:17.71393' ) AS notsupp_trunc;
+SELECT date_trunc( 'timezone', timestamp with time zone 'infinity' ) AS notsupp_inf_trunc;
 SELECT date_trunc( 'ago', timestamp with time zone 'infinity' ) AS invalid_trunc;
 
 SELECT date_trunc('day', timestamp with time zone '2001-02-16 20:38:40+00', 'Australia/Sydney') as sydney_trunc;  -- zone name
 SELECT date_trunc('day', timestamp with time zone '2001-02-16 20:38:40+00', 'GMT') as gmt_trunc;  -- fixed-offset abbreviation
 SELECT date_trunc('day', timestamp with time zone '2001-02-16 20:38:40+00', 'VET') as vet_trunc;  -- variable-offset abbreviation
+SELECT date_trunc('timezone', timestamp with time zone 'infinity', 'GMT') AS notsupp_zone_trunc;
+SELECT date_trunc( 'week', timestamp with time zone 'infinity', 'GMT') AS inf_zone_trunc;
 SELECT date_trunc('ago', timestamp with time zone 'infinity', 'GMT') AS invalid_zone_trunc;
 
-
-
 -- verify date_bin behaves the same as date_trunc for relevant intervals
 SELECT
   str,