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Add regression tests exercising the non-hashed code paths in nodeSetop.c.
author Tom Lane <tgl@sss.pgh.pa.us>
2017年8月11日 20:52:12 +0000 (16:52 -0400)
committer Tom Lane <tgl@sss.pgh.pa.us>
2017年8月11日 21:28:01 +0000 (17:28 -0400)
Perusal of the code coverage report shows that the existing regression
test cases for INTERSECT and EXCEPT seemingly all prefer the SETOP_HASHED
implementation. Add some test cases in which we force use of the
SETOP_SORTED mode.

src/test/regress/expected/union.out patch | blob | blame | history
src/test/regress/sql/union.sql patch | blob | blame | history

diff --git a/src/test/regress/expected/union.out b/src/test/regress/expected/union.out
index 5c4edd1c16645b30daf530e8c8f05839dc46d2ee..ee26b163f7d5773bc5432ced99edfae200d9f2a0 100644 (file)
--- a/src/test/regress/expected/union.out
+++ b/src/test/regress/expected/union.out
@@ -345,6 +345,96 @@ ERROR: FOR NO KEY UPDATE is not allowed with UNION/INTERSECT/EXCEPT
1 | 2 | 3
(1 row)
+-- exercise both hashed and sorted implementations of INTERSECT/EXCEPT
+set enable_hashagg to on;
+explain (costs off)
+select count(*) from
+ ( select unique1 from tenk1 intersect select fivethous from tenk1 ) ss;
+ QUERY PLAN
+------------------------------------------------------------------------------------
+ Aggregate
+ -> Subquery Scan on ss
+ -> HashSetOp Intersect
+ -> Append
+ -> Subquery Scan on "*SELECT* 2"
+ -> Seq Scan on tenk1
+ -> Subquery Scan on "*SELECT* 1"
+ -> Index Only Scan using tenk1_unique1 on tenk1 tenk1_1
+(8 rows)
+
+select count(*) from
+ ( select unique1 from tenk1 intersect select fivethous from tenk1 ) ss;
+ count
+-------
+ 5000
+(1 row)
+
+explain (costs off)
+select unique1 from tenk1 except select unique2 from tenk1 where unique2 != 10;
+ QUERY PLAN
+------------------------------------------------------------------------
+ HashSetOp Except
+ -> Append
+ -> Subquery Scan on "*SELECT* 1"
+ -> Index Only Scan using tenk1_unique1 on tenk1
+ -> Subquery Scan on "*SELECT* 2"
+ -> Index Only Scan using tenk1_unique2 on tenk1 tenk1_1
+ Filter: (unique2 <> 10)
+(7 rows)
+
+select unique1 from tenk1 except select unique2 from tenk1 where unique2 != 10;
+ unique1
+---------
+ 10
+(1 row)
+
+set enable_hashagg to off;
+explain (costs off)
+select count(*) from
+ ( select unique1 from tenk1 intersect select fivethous from tenk1 ) ss;
+ QUERY PLAN
+------------------------------------------------------------------------------------------
+ Aggregate
+ -> Subquery Scan on ss
+ -> SetOp Intersect
+ -> Sort
+ Sort Key: "*SELECT* 2".fivethous
+ -> Append
+ -> Subquery Scan on "*SELECT* 2"
+ -> Seq Scan on tenk1
+ -> Subquery Scan on "*SELECT* 1"
+ -> Index Only Scan using tenk1_unique1 on tenk1 tenk1_1
+(10 rows)
+
+select count(*) from
+ ( select unique1 from tenk1 intersect select fivethous from tenk1 ) ss;
+ count
+-------
+ 5000
+(1 row)
+
+explain (costs off)
+select unique1 from tenk1 except select unique2 from tenk1 where unique2 != 10;
+ QUERY PLAN
+------------------------------------------------------------------------------
+ SetOp Except
+ -> Sort
+ Sort Key: "*SELECT* 1".unique1
+ -> Append
+ -> Subquery Scan on "*SELECT* 1"
+ -> Index Only Scan using tenk1_unique1 on tenk1
+ -> Subquery Scan on "*SELECT* 2"
+ -> Index Only Scan using tenk1_unique2 on tenk1 tenk1_1
+ Filter: (unique2 <> 10)
+(9 rows)
+
+select unique1 from tenk1 except select unique2 from tenk1 where unique2 != 10;
+ unique1
+---------
+ 10
+(1 row)
+
+reset enable_hashagg;
--
-- Mixed types
--
diff --git a/src/test/regress/sql/union.sql b/src/test/regress/sql/union.sql
index 5e0eff2ca301b8bfc1eadbdd185c0233782a61d6..c0317cccb4ba359463c1546800eaa04c28c43de8 100644 (file)
--- a/src/test/regress/sql/union.sql
+++ b/src/test/regress/sql/union.sql
@@ -118,6 +118,34 @@ SELECT q1 FROM int8_tbl EXCEPT ALL SELECT q1 FROM int8_tbl FOR NO KEY UPDATE;
(SELECT 1,2,3 UNION SELECT 4,5,6) EXCEPT SELECT 4,5,6;
(SELECT 1,2,3 UNION SELECT 4,5,6 ORDER BY 1,2) EXCEPT SELECT 4,5,6;
+-- exercise both hashed and sorted implementations of INTERSECT/EXCEPT
+
+set enable_hashagg to on;
+
+explain (costs off)
+select count(*) from
+ ( select unique1 from tenk1 intersect select fivethous from tenk1 ) ss;
+select count(*) from
+ ( select unique1 from tenk1 intersect select fivethous from tenk1 ) ss;
+
+explain (costs off)
+select unique1 from tenk1 except select unique2 from tenk1 where unique2 != 10;
+select unique1 from tenk1 except select unique2 from tenk1 where unique2 != 10;
+
+set enable_hashagg to off;
+
+explain (costs off)
+select count(*) from
+ ( select unique1 from tenk1 intersect select fivethous from tenk1 ) ss;
+select count(*) from
+ ( select unique1 from tenk1 intersect select fivethous from tenk1 ) ss;
+
+explain (costs off)
+select unique1 from tenk1 except select unique2 from tenk1 where unique2 != 10;
+select unique1 from tenk1 except select unique2 from tenk1 where unique2 != 10;
+
+reset enable_hashagg;
+
--
-- Mixed types
--
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