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Tweak new regression test case for better portability.

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Buildfarm says we get different plans on 32-bit and 64-bit platforms,
probably because of MAXALIGN-related differences in memory-consumption
calculations.  Add some dummy WHERE clauses so that the planner estimates
different sizes for the three generate_series() relations; that should
stabilize the choice of join order.
This commit is contained in:
Tom Lane
2014-06-04 21:31:41 -04:00
parent 4c8ab1b91d
commit d4d48a5edd
2 changed files with 8 additions and 2 deletions
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8
src/test/regress/expected/pg_lsn.out
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@@ -70,6 +70,7 @@ SELECT DISTINCT (i || '/' || j)::pg_lsn f
FROM generate_series(1, 10) i, FROM generate_series(1, 10) i,
generate_series(1, 10) j, generate_series(1, 10) j,
generate_series(1, 5) k generate_series(1, 5) k
WHERE i <= 10 AND j > 0 AND j <= 10
ORDER BY f; ORDER BY f;
QUERY PLAN QUERY PLAN
-------------------------------------------------------------------------- --------------------------------------------------------------------------
@@ -81,14 +82,17 @@ SELECT DISTINCT (i || '/' || j)::pg_lsn f
-> Function Scan on generate_series k -> Function Scan on generate_series k
-> Materialize -> Materialize
-> Nested Loop -> Nested Loop
-> Function Scan on generate_series i
-> Function Scan on generate_series j -> Function Scan on generate_series j
(10 rows) Filter: ((j > 0) AND (j <= 10))
-> Function Scan on generate_series i
Filter: (i <= 10)
(12 rows)
SELECT DISTINCT (i || '/' || j)::pg_lsn f SELECT DISTINCT (i || '/' || j)::pg_lsn f
FROM generate_series(1, 10) i, FROM generate_series(1, 10) i,
generate_series(1, 10) j, generate_series(1, 10) j,
generate_series(1, 5) k generate_series(1, 5) k
WHERE i <= 10 AND j > 0 AND j <= 10
ORDER BY f; ORDER BY f;
f f
------- -------

2
src/test/regress/sql/pg_lsn.sql
View File

@@ -30,10 +30,12 @@ SELECT DISTINCT (i || '/' || j)::pg_lsn f
FROM generate_series(1, 10) i, FROM generate_series(1, 10) i,
generate_series(1, 10) j, generate_series(1, 10) j,
generate_series(1, 5) k generate_series(1, 5) k
WHERE i <= 10 AND j > 0 AND j <= 10
ORDER BY f; ORDER BY f;
SELECT DISTINCT (i || '/' || j)::pg_lsn f SELECT DISTINCT (i || '/' || j)::pg_lsn f
FROM generate_series(1, 10) i, FROM generate_series(1, 10) i,
generate_series(1, 10) j, generate_series(1, 10) j,
generate_series(1, 5) k generate_series(1, 5) k
WHERE i <= 10 AND j > 0 AND j <= 10
ORDER BY f; ORDER BY f;