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--
-- 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;
rollback;
select sum(tenthous) as s1, sum(tenthous) + random()*0 as s2
from tenk1 group by thousand order by thousand limit 3;
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;
-- leave these views
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