Adding upstream version 13.4.upstream/13.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 442 insertions, 0 deletions

diff --git a/src/test/regress/sql/union.sql b/src/test/regress/sql/union.sql
new file mode 100644
index 0000000..5f4881d
--- /dev/null
+++ b/src/test/regress/sql/union.sql
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+--
+-- UNION (also INTERSECT, EXCEPT)
+--
+
+-- Simple UNION constructs
+
+SELECT 1 AS two UNION SELECT 2 ORDER BY 1;
+
+SELECT 1 AS one UNION SELECT 1 ORDER BY 1;
+
+SELECT 1 AS two UNION ALL SELECT 2;
+
+SELECT 1 AS two UNION ALL SELECT 1;
+
+SELECT 1 AS three UNION SELECT 2 UNION SELECT 3 ORDER BY 1;
+
+SELECT 1 AS two UNION SELECT 2 UNION SELECT 2 ORDER BY 1;
+
+SELECT 1 AS three UNION SELECT 2 UNION ALL SELECT 2 ORDER BY 1;
+
+SELECT 1.1 AS two UNION SELECT 2.2 ORDER BY 1;
+
+-- Mixed types
+
+SELECT 1.1 AS two UNION SELECT 2 ORDER BY 1;
+
+SELECT 1 AS two UNION SELECT 2.2 ORDER BY 1;
+
+SELECT 1 AS one UNION SELECT 1.0::float8 ORDER BY 1;
+
+SELECT 1.1 AS two UNION ALL SELECT 2 ORDER BY 1;
+
+SELECT 1.0::float8 AS two UNION ALL SELECT 1 ORDER BY 1;
+
+SELECT 1.1 AS three UNION SELECT 2 UNION SELECT 3 ORDER BY 1;
+
+SELECT 1.1::float8 AS two UNION SELECT 2 UNION SELECT 2.0::float8 ORDER BY 1;
+
+SELECT 1.1 AS three UNION SELECT 2 UNION ALL SELECT 2 ORDER BY 1;
+
+SELECT 1.1 AS two UNION (SELECT 2 UNION ALL SELECT 2) ORDER BY 1;
+
+--
+-- Try testing from tables...
+--
+
+SELECT f1 AS five FROM FLOAT8_TBL
+UNION
+SELECT f1 FROM FLOAT8_TBL
+ORDER BY 1;
+
+SELECT f1 AS ten FROM FLOAT8_TBL
+UNION ALL
+SELECT f1 FROM FLOAT8_TBL;
+
+SELECT f1 AS nine FROM FLOAT8_TBL
+UNION
+SELECT f1 FROM INT4_TBL
+ORDER BY 1;
+
+SELECT f1 AS ten FROM FLOAT8_TBL
+UNION ALL
+SELECT f1 FROM INT4_TBL;
+
+SELECT f1 AS five FROM FLOAT8_TBL
+  WHERE f1 BETWEEN -1e6 AND 1e6
+UNION
+SELECT f1 FROM INT4_TBL
+  WHERE f1 BETWEEN 0 AND 1000000
+ORDER BY 1;
+
+SELECT CAST(f1 AS char(4)) AS three FROM VARCHAR_TBL
+UNION
+SELECT f1 FROM CHAR_TBL
+ORDER BY 1;
+
+SELECT f1 AS three FROM VARCHAR_TBL
+UNION
+SELECT CAST(f1 AS varchar) FROM CHAR_TBL
+ORDER BY 1;
+
+SELECT f1 AS eight FROM VARCHAR_TBL
+UNION ALL
+SELECT f1 FROM CHAR_TBL;
+
+SELECT f1 AS five FROM TEXT_TBL
+UNION
+SELECT f1 FROM VARCHAR_TBL
+UNION
+SELECT TRIM(TRAILING FROM f1) FROM CHAR_TBL
+ORDER BY 1;
+
+--
+-- INTERSECT and EXCEPT
+--
+
+SELECT q2 FROM int8_tbl INTERSECT SELECT q1 FROM int8_tbl ORDER BY 1;
+
+SELECT q2 FROM int8_tbl INTERSECT ALL SELECT q1 FROM int8_tbl ORDER BY 1;
+
+SELECT q2 FROM int8_tbl EXCEPT SELECT q1 FROM int8_tbl ORDER BY 1;
+
+SELECT q2 FROM int8_tbl EXCEPT ALL SELECT q1 FROM int8_tbl ORDER BY 1;
+
+SELECT q2 FROM int8_tbl EXCEPT ALL SELECT DISTINCT q1 FROM int8_tbl ORDER BY 1;
+
+SELECT q1 FROM int8_tbl EXCEPT SELECT q2 FROM int8_tbl ORDER BY 1;
+
+SELECT q1 FROM int8_tbl EXCEPT ALL SELECT q2 FROM int8_tbl ORDER BY 1;
+
+SELECT q1 FROM int8_tbl EXCEPT ALL SELECT DISTINCT q2 FROM int8_tbl ORDER BY 1;
+
+SELECT q1 FROM int8_tbl EXCEPT ALL SELECT q1 FROM int8_tbl FOR NO KEY UPDATE;
+
+-- nested cases
+(SELECT 1,2,3 UNION SELECT 4,5,6) INTERSECT SELECT 4,5,6;
+(SELECT 1,2,3 UNION SELECT 4,5,6 ORDER BY 1,2) INTERSECT SELECT 4,5,6;
+(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
+--
+
+SELECT f1 FROM float8_tbl INTERSECT SELECT f1 FROM int4_tbl ORDER BY 1;
+
+SELECT f1 FROM float8_tbl EXCEPT SELECT f1 FROM int4_tbl ORDER BY 1;
+
+--
+-- Operator precedence and (((((extra))))) parentheses
+--
+
+SELECT q1 FROM int8_tbl INTERSECT SELECT q2 FROM int8_tbl UNION ALL SELECT q2 FROM int8_tbl  ORDER BY 1;
+
+SELECT q1 FROM int8_tbl INTERSECT (((SELECT q2 FROM int8_tbl UNION ALL SELECT q2 FROM int8_tbl))) ORDER BY 1;
+
+(((SELECT q1 FROM int8_tbl INTERSECT SELECT q2 FROM int8_tbl ORDER BY 1))) UNION ALL SELECT q2 FROM int8_tbl;
+
+SELECT q1 FROM int8_tbl UNION ALL SELECT q2 FROM int8_tbl EXCEPT SELECT q1 FROM int8_tbl ORDER BY 1;
+
+SELECT q1 FROM int8_tbl UNION ALL (((SELECT q2 FROM int8_tbl EXCEPT SELECT q1 FROM int8_tbl ORDER BY 1)));
+
+(((SELECT q1 FROM int8_tbl UNION ALL SELECT q2 FROM int8_tbl))) EXCEPT SELECT q1 FROM int8_tbl ORDER BY 1;
+
+--
+-- Subqueries with ORDER BY & LIMIT clauses
+--
+
+-- In this syntax, ORDER BY/LIMIT apply to the result of the EXCEPT
+SELECT q1,q2 FROM int8_tbl EXCEPT SELECT q2,q1 FROM int8_tbl
+ORDER BY q2,q1;
+
+-- This should fail, because q2 isn't a name of an EXCEPT output column
+SELECT q1 FROM int8_tbl EXCEPT SELECT q2 FROM int8_tbl ORDER BY q2 LIMIT 1;
+
+-- But this should work:
+SELECT q1 FROM int8_tbl EXCEPT (((SELECT q2 FROM int8_tbl ORDER BY q2 LIMIT 1))) ORDER BY 1;
+
+--
+-- New syntaxes (7.1) permit new tests
+--
+
+(((((select * from int8_tbl)))));
+
+--
+-- Check behavior with empty select list (allowed since 9.4)
+--
+
+select union select;
+select intersect select;
+select except select;
+
+-- check hashed implementation
+set enable_hashagg = true;
+set enable_sort = false;
+
+explain (costs off)
+select from generate_series(1,5) union select from generate_series(1,3);
+explain (costs off)
+select from generate_series(1,5) intersect select from generate_series(1,3);
+
+select from generate_series(1,5) union select from generate_series(1,3);
+select from generate_series(1,5) union all select from generate_series(1,3);
+select from generate_series(1,5) intersect select from generate_series(1,3);
+select from generate_series(1,5) intersect all select from generate_series(1,3);
+select from generate_series(1,5) except select from generate_series(1,3);
+select from generate_series(1,5) except all select from generate_series(1,3);
+
+-- check sorted implementation
+set enable_hashagg = false;
+set enable_sort = true;
+
+explain (costs off)
+select from generate_series(1,5) union select from generate_series(1,3);
+explain (costs off)
+select from generate_series(1,5) intersect select from generate_series(1,3);
+
+select from generate_series(1,5) union select from generate_series(1,3);
+select from generate_series(1,5) union all select from generate_series(1,3);
+select from generate_series(1,5) intersect select from generate_series(1,3);
+select from generate_series(1,5) intersect all select from generate_series(1,3);
+select from generate_series(1,5) except select from generate_series(1,3);
+select from generate_series(1,5) except all select from generate_series(1,3);
+
+reset enable_hashagg;
+reset enable_sort;
+
+--
+-- Check handling of a case with unknown constants.  We don't guarantee
+-- an undecorated constant will work in all cases, but historically this
+-- usage has worked, so test we don't break it.
+--
+
+SELECT a.f1 FROM (SELECT 'test' AS f1 FROM varchar_tbl) a
+UNION
+SELECT b.f1 FROM (SELECT f1 FROM varchar_tbl) b
+ORDER BY 1;
+
+-- This should fail, but it should produce an error cursor
+SELECT '3.4'::numeric UNION SELECT 'foo';
+
+--
+-- Test that expression-index constraints can be pushed down through
+-- UNION or UNION ALL
+--
+
+CREATE TEMP TABLE t1 (a text, b text);
+CREATE INDEX t1_ab_idx on t1 ((a || b));
+CREATE TEMP TABLE t2 (ab text primary key);
+INSERT INTO t1 VALUES ('a', 'b'), ('x', 'y');
+INSERT INTO t2 VALUES ('ab'), ('xy');
+
+set enable_seqscan = off;
+set enable_indexscan = on;
+set enable_bitmapscan = off;
+
+explain (costs off)
+ SELECT * FROM
+ (SELECT a || b AS ab FROM t1
+  UNION ALL
+  SELECT * FROM t2) t
+ WHERE ab = 'ab';
+
+explain (costs off)
+ SELECT * FROM
+ (SELECT a || b AS ab FROM t1
+  UNION
+  SELECT * FROM t2) t
+ WHERE ab = 'ab';
+
+--
+-- Test that ORDER BY for UNION ALL can be pushed down to inheritance
+-- children.
+--
+
+CREATE TEMP TABLE t1c (b text, a text);
+ALTER TABLE t1c INHERIT t1;
+CREATE TEMP TABLE t2c (primary key (ab)) INHERITS (t2);
+INSERT INTO t1c VALUES ('v', 'w'), ('c', 'd'), ('m', 'n'), ('e', 'f');
+INSERT INTO t2c VALUES ('vw'), ('cd'), ('mn'), ('ef');
+CREATE INDEX t1c_ab_idx on t1c ((a || b));
+
+set enable_seqscan = on;
+set enable_indexonlyscan = off;
+
+explain (costs off)
+  SELECT * FROM
+  (SELECT a || b AS ab FROM t1
+   UNION ALL
+   SELECT ab FROM t2) t
+  ORDER BY 1 LIMIT 8;
+
+  SELECT * FROM
+  (SELECT a || b AS ab FROM t1
+   UNION ALL
+   SELECT ab FROM t2) t
+  ORDER BY 1 LIMIT 8;
+
+reset enable_seqscan;
+reset enable_indexscan;
+reset enable_bitmapscan;
+
+-- This simpler variant of the above test has been observed to fail differently
+
+create table events (event_id int primary key);
+create table other_events (event_id int primary key);
+create table events_child () inherits (events);
+
+explain (costs off)
+select event_id
+ from (select event_id from events
+       union all
+       select event_id from other_events) ss
+ order by event_id;
+
+drop table events_child, events, other_events;
+
+reset enable_indexonlyscan;
+
+-- Test constraint exclusion of UNION ALL subqueries
+explain (costs off)
+ SELECT * FROM
+  (SELECT 1 AS t, * FROM tenk1 a
+   UNION ALL
+   SELECT 2 AS t, * FROM tenk1 b) c
+ WHERE t = 2;
+
+-- Test that we push quals into UNION sub-selects only when it's safe
+explain (costs off)
+SELECT * FROM
+  (SELECT 1 AS t, 2 AS x
+   UNION
+   SELECT 2 AS t, 4 AS x) ss
+WHERE x < 4
+ORDER BY x;
+
+SELECT * FROM
+  (SELECT 1 AS t, 2 AS x
+   UNION
+   SELECT 2 AS t, 4 AS x) ss
+WHERE x < 4
+ORDER BY x;
+
+explain (costs off)
+SELECT * FROM
+  (SELECT 1 AS t, generate_series(1,10) AS x
+   UNION
+   SELECT 2 AS t, 4 AS x) ss
+WHERE x < 4
+ORDER BY x;
+
+SELECT * FROM
+  (SELECT 1 AS t, generate_series(1,10) AS x
+   UNION
+   SELECT 2 AS t, 4 AS x) ss
+WHERE x < 4
+ORDER BY x;
+
+explain (costs off)
+SELECT * FROM
+  (SELECT 1 AS t, (random()*3)::int AS x
+   UNION
+   SELECT 2 AS t, 4 AS x) ss
+WHERE x > 3
+ORDER BY x;
+
+SELECT * FROM
+  (SELECT 1 AS t, (random()*3)::int AS x
+   UNION
+   SELECT 2 AS t, 4 AS x) ss
+WHERE x > 3
+ORDER BY x;
+
+-- Test cases where the native ordering of a sub-select has more pathkeys
+-- than the outer query cares about
+explain (costs off)
+select distinct q1 from
+  (select distinct * from int8_tbl i81
+   union all
+   select distinct * from int8_tbl i82) ss
+where q2 = q2;
+
+select distinct q1 from
+  (select distinct * from int8_tbl i81
+   union all
+   select distinct * from int8_tbl i82) ss
+where q2 = q2;
+
+explain (costs off)
+select distinct q1 from
+  (select distinct * from int8_tbl i81
+   union all
+   select distinct * from int8_tbl i82) ss
+where -q1 = q2;
+
+select distinct q1 from
+  (select distinct * from int8_tbl i81
+   union all
+   select distinct * from int8_tbl i82) ss
+where -q1 = q2;
+
+-- Test proper handling of parameterized appendrel paths when the
+-- potential join qual is expensive
+create function expensivefunc(int) returns int
+language plpgsql immutable strict cost 10000
+as $$begin return $1; end$$;
+
+create temp table t3 as select generate_series(-1000,1000) as x;
+create index t3i on t3 (expensivefunc(x));
+analyze t3;
+
+explain (costs off)
+select * from
+  (select * from t3 a union all select * from t3 b) ss
+  join int4_tbl on f1 = expensivefunc(x);
+select * from
+  (select * from t3 a union all select * from t3 b) ss
+  join int4_tbl on f1 = expensivefunc(x);
+
+drop table t3;
+drop function expensivefunc(int);
+
+-- Test handling of appendrel quals that const-simplify into an AND
+explain (costs off)
+select * from
+  (select *, 0 as x from int8_tbl a
+   union all
+   select *, 1 as x from int8_tbl b) ss
+where (x = 0) or (q1 >= q2 and q1 <= q2);
+select * from
+  (select *, 0 as x from int8_tbl a
+   union all
+   select *, 1 as x from int8_tbl b) ss
+where (x = 0) or (q1 >= q2 and q1 <= q2);