chore: import upstream snapshot with attribution
This commit is contained in:
wehub-resource-sync
@@ -0,0 +1,201 @@
|
||||
--
|
||||
-- LIMIT
|
||||
-- Check the LIMIT/OFFSET feature of SELECT
|
||||
--
|
||||
|
||||
SELECT ''::text AS two, unique1, unique2, stringu1
|
||||
FROM onek WHERE unique1 > 50
|
||||
ORDER BY unique1 LIMIT 2;
|
||||
SELECT ''::text AS five, unique1, unique2, stringu1
|
||||
FROM onek WHERE unique1 > 60
|
||||
ORDER BY unique1 LIMIT 5;
|
||||
SELECT ''::text AS two, unique1, unique2, stringu1
|
||||
FROM onek WHERE unique1 > 60 AND unique1 < 63
|
||||
ORDER BY unique1 LIMIT 5;
|
||||
SELECT ''::text AS three, unique1, unique2, stringu1
|
||||
FROM onek WHERE unique1 > 100
|
||||
ORDER BY unique1 LIMIT 3 OFFSET 20;
|
||||
SELECT ''::text AS zero, unique1, unique2, stringu1
|
||||
FROM onek WHERE unique1 < 50
|
||||
ORDER BY unique1 DESC LIMIT 8 OFFSET 99;
|
||||
SELECT ''::text AS eleven, unique1, unique2, stringu1
|
||||
FROM onek WHERE unique1 < 50
|
||||
ORDER BY unique1 DESC LIMIT 20 OFFSET 39;
|
||||
SELECT ''::text AS ten, unique1, unique2, stringu1
|
||||
FROM onek
|
||||
ORDER BY unique1 OFFSET 990;
|
||||
SELECT ''::text AS five, unique1, unique2, stringu1
|
||||
FROM onek
|
||||
ORDER BY unique1 OFFSET 990 LIMIT 5;
|
||||
SELECT ''::text AS five, unique1, unique2, stringu1
|
||||
FROM onek
|
||||
ORDER BY unique1 LIMIT 5 OFFSET 900;
|
||||
|
||||
-- Test null limit and offset. The planner would discard a simple null
|
||||
-- constant, so to ensure executor is exercised, do this:
|
||||
select * from int8_tbl limit (case when random() < 0.5 then null::bigint end);
|
||||
select * from int8_tbl offset (case when random() < 0.5 then null::bigint end);
|
||||
|
||||
-- Test assorted cases involving backwards fetch from a LIMIT plan node
|
||||
begin;
|
||||
|
||||
declare c1 cursor for select * from int8_tbl limit 10;
|
||||
fetch all in c1;
|
||||
fetch 1 in c1;
|
||||
fetch backward 1 in c1;
|
||||
fetch backward all in c1;
|
||||
fetch backward 1 in c1;
|
||||
fetch all in c1;
|
||||
|
||||
declare c2 cursor for select * from int8_tbl limit 3;
|
||||
fetch all in c2;
|
||||
fetch 1 in c2;
|
||||
fetch backward 1 in c2;
|
||||
fetch backward all in c2;
|
||||
fetch backward 1 in c2;
|
||||
fetch all in c2;
|
||||
|
||||
declare c3 cursor for select * from int8_tbl offset 3;
|
||||
fetch all in c3;
|
||||
fetch 1 in c3;
|
||||
fetch backward 1 in c3;
|
||||
fetch backward all in c3;
|
||||
fetch backward 1 in c3;
|
||||
fetch all in c3;
|
||||
|
||||
declare c4 cursor for select * from int8_tbl offset 10;
|
||||
fetch all in c4;
|
||||
fetch 1 in c4;
|
||||
fetch backward 1 in c4;
|
||||
fetch backward all in c4;
|
||||
fetch backward 1 in c4;
|
||||
fetch all in c4;
|
||||
|
||||
declare c5 cursor for select * from int8_tbl order by q1 fetch first 2 rows with ties;
|
||||
fetch all in c5;
|
||||
fetch 1 in c5;
|
||||
fetch backward 1 in c5;
|
||||
fetch backward 1 in c5;
|
||||
fetch all in c5;
|
||||
fetch backward all in c5;
|
||||
fetch all in c5;
|
||||
fetch backward all in c5;
|
||||
|
||||
rollback;
|
||||
|
||||
-- Stress test for variable LIMIT in conjunction with bounded-heap sorting
|
||||
|
||||
SELECT
|
||||
(SELECT n
|
||||
FROM (VALUES (1)) AS x,
|
||||
(SELECT n FROM generate_series(1,10) AS n
|
||||
ORDER BY n LIMIT 1 OFFSET s-1) AS y) AS z
|
||||
FROM generate_series(1,10) AS s;
|
||||
|
||||
--
|
||||
-- Test behavior of volatile and set-returning functions in conjunction
|
||||
-- with ORDER BY and LIMIT.
|
||||
--
|
||||
|
||||
create temp sequence testseq;
|
||||
|
||||
explain (verbose, costs off)
|
||||
select unique1, unique2, nextval('testseq')
|
||||
from tenk1 order by unique2 limit 10;
|
||||
|
||||
select unique1, unique2, nextval('testseq')
|
||||
from tenk1 order by unique2 limit 10;
|
||||
|
||||
select currval('testseq');
|
||||
|
||||
explain (verbose, costs off)
|
||||
select unique1, unique2, nextval('testseq')
|
||||
from tenk1 order by tenthous limit 10;
|
||||
|
||||
select unique1, unique2, nextval('testseq')
|
||||
from tenk1 order by tenthous limit 10;
|
||||
|
||||
select currval('testseq');
|
||||
|
||||
explain (verbose, costs off)
|
||||
select unique1, unique2, generate_series(1,10)
|
||||
from tenk1 order by unique2 limit 7;
|
||||
|
||||
select unique1, unique2, generate_series(1,10)
|
||||
from tenk1 order by unique2 limit 7;
|
||||
|
||||
explain (verbose, costs off)
|
||||
select unique1, unique2, generate_series(1,10)
|
||||
from tenk1 order by tenthous limit 7;
|
||||
|
||||
select unique1, unique2, generate_series(1,10)
|
||||
from tenk1 order by tenthous limit 7;
|
||||
|
||||
-- use of random() is to keep planner from folding the expressions together
|
||||
explain (verbose, costs off)
|
||||
select generate_series(0,2) as s1, generate_series((random()*.1)::int,2) as s2;
|
||||
|
||||
select generate_series(0,2) as s1, generate_series((random()*.1)::int,2) as s2;
|
||||
|
||||
explain (verbose, costs off)
|
||||
select generate_series(0,2) as s1, generate_series((random()*.1)::int,2) as s2
|
||||
order by s2 desc;
|
||||
|
||||
select generate_series(0,2) as s1, generate_series((random()*.1)::int,2) as s2
|
||||
order by s2 desc;
|
||||
|
||||
-- test for failure to set all aggregates' aggtranstype
|
||||
explain (verbose, costs off)
|
||||
select sum(tenthous) as s1, sum(tenthous) + random()*0 as s2
|
||||
from tenk1 group by thousand order by thousand limit 3;
|
||||
|
||||
select sum(tenthous) as s1, sum(tenthous) + random()*0 as s2
|
||||
from tenk1 group by thousand order by thousand limit 3;
|
||||
|
||||
--
|
||||
-- FETCH FIRST
|
||||
-- Check the WITH TIES clause
|
||||
--
|
||||
|
||||
SELECT thousand
|
||||
FROM onek WHERE thousand < 5
|
||||
ORDER BY thousand FETCH FIRST 2 ROW WITH TIES;
|
||||
|
||||
SELECT thousand
|
||||
FROM onek WHERE thousand < 5
|
||||
ORDER BY thousand FETCH FIRST ROWS WITH TIES;
|
||||
|
||||
SELECT thousand
|
||||
FROM onek WHERE thousand < 5
|
||||
ORDER BY thousand FETCH FIRST 1 ROW WITH TIES;
|
||||
|
||||
SELECT thousand
|
||||
FROM onek WHERE thousand < 5
|
||||
ORDER BY thousand FETCH FIRST 2 ROW ONLY;
|
||||
|
||||
-- SKIP LOCKED and WITH TIES are incompatible
|
||||
SELECT thousand
|
||||
FROM onek WHERE thousand < 5
|
||||
ORDER BY thousand FETCH FIRST 1 ROW WITH TIES FOR UPDATE SKIP LOCKED;
|
||||
|
||||
-- should fail
|
||||
SELECT ''::text AS two, unique1, unique2, stringu1
|
||||
FROM onek WHERE unique1 > 50
|
||||
FETCH FIRST 2 ROW WITH TIES;
|
||||
|
||||
-- test ruleutils
|
||||
CREATE VIEW limit_thousand_v_1 AS SELECT thousand FROM onek WHERE thousand < 995
|
||||
ORDER BY thousand FETCH FIRST 5 ROWS WITH TIES OFFSET 10;
|
||||
\d+ limit_thousand_v_1
|
||||
CREATE VIEW limit_thousand_v_2 AS SELECT thousand FROM onek WHERE thousand < 995
|
||||
ORDER BY thousand OFFSET 10 FETCH FIRST 5 ROWS ONLY;
|
||||
\d+ limit_thousand_v_2
|
||||
CREATE VIEW limit_thousand_v_3 AS SELECT thousand FROM onek WHERE thousand < 995
|
||||
ORDER BY thousand FETCH FIRST NULL ROWS WITH TIES; -- fails
|
||||
CREATE VIEW limit_thousand_v_3 AS SELECT thousand FROM onek WHERE thousand < 995
|
||||
ORDER BY thousand FETCH FIRST (NULL+1) ROWS WITH TIES;
|
||||
\d+ limit_thousand_v_3
|
||||
CREATE VIEW limit_thousand_v_4 AS SELECT thousand FROM onek WHERE thousand < 995
|
||||
ORDER BY thousand FETCH FIRST NULL ROWS ONLY;
|
||||
\d+ limit_thousand_v_4
|
||||
-- leave these views
|
||||
Reference in New Issue
Block a user