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Repair interaction between IN-join processing and subselect pullup that

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I inadvertently broke a few days ago (per report from Sean Thomas).
Add regression test case to try to catch any similar breakage in future.
This commit is contained in:
Tom Lane
2003-10-18 16:52:15 +00:00
parent c02036b1d8
commit eda80f09ff
3 changed files with 63 additions and 6 deletions
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36
src/test/regress/expected/subselect.out
View File

@@ -165,3 +165,39 @@ from int8_tbl group by q1 order by q1;
4567890123456789 | 0.6
(2 rows)
--
-- Test cases to catch unpleasant interactions between IN-join processing
-- and subquery pullup.
--
select count(*) from
(select 1 from tenk1 a
where unique1 IN (select hundred from tenk1 b)) ss;
count
-------
100
(1 row)
select count(distinct ss.ten) from
(select ten from tenk1 a
where unique1 IN (select hundred from tenk1 b)) ss;
count
-------
10
(1 row)
select count(*) from
(select 1 from tenk1 a
where unique1 IN (select distinct hundred from tenk1 b)) ss;
count
-------
100
(1 row)
select count(distinct ss.ten) from
(select ten from tenk1 a
where unique1 IN (select distinct hundred from tenk1 b)) ss;
count
-------
10
(1 row)

18
src/test/regress/sql/subselect.sql
View File

@@ -75,3 +75,21 @@ SELECT '' AS eight, ss.f1 AS "Correlated Field", ss.f3 AS "Second Field"
select q1, float8(count(*)) / (select count(*) from int8_tbl)
from int8_tbl group by q1 order by q1;
--
-- Test cases to catch unpleasant interactions between IN-join processing
-- and subquery pullup.
--
select count(*) from
(select 1 from tenk1 a
where unique1 IN (select hundred from tenk1 b)) ss;
select count(distinct ss.ten) from
(select ten from tenk1 a
where unique1 IN (select hundred from tenk1 b)) ss;
select count(*) from
(select 1 from tenk1 a
where unique1 IN (select distinct hundred from tenk1 b)) ss;
select count(distinct ss.ten) from
(select ten from tenk1 a
where unique1 IN (select distinct hundred from tenk1 b)) ss;