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Commitac2d0e4

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Add test case for bug #8410.
Per Andres Freund.
1 parent8e2b71d commitac2d0e4

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2 files changed

+61
-0
lines changed

2 files changed

+61
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lines changed

‎src/test/regress/expected/inherit.out

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@@ -1350,6 +1350,47 @@ ORDER BY x, y;
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-> Index Only Scan using tenk1_unique2 on tenk1 b
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(6 rows)
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-- exercise rescan code path via a repeatedly-evaluated subquery
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explain (costs off)
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SELECT
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(SELECT g.i FROM (
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(SELECT * FROM generate_series(1, 2) ORDER BY 1)
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UNION ALL
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(SELECT * FROM generate_series(1, 2) ORDER BY 1)
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) f(i)
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ORDER BY f.i LIMIT 1)
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FROM generate_series(1, 3) g(i);
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QUERY PLAN
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------------------------------------------------------------------------------------
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Function Scan on generate_series g
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SubPlan 1
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-> Limit
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-> Result
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-> Merge Append
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Sort Key: generate_series.generate_series
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-> Sort
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Sort Key: generate_series.generate_series
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-> Function Scan on generate_series
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-> Sort
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Sort Key: generate_series_1.generate_series
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-> Function Scan on generate_series generate_series_1
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(12 rows)
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SELECT
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(SELECT g.i FROM (
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(SELECT * FROM generate_series(1, 2) ORDER BY 1)
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UNION ALL
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(SELECT * FROM generate_series(1, 2) ORDER BY 1)
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) f(i)
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ORDER BY f.i LIMIT 1)
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FROM generate_series(1, 3) g(i);
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i
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---
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1
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2
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3
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(3 rows)
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reset enable_seqscan;
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reset enable_indexscan;
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reset enable_bitmapscan;

‎src/test/regress/sql/inherit.sql

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@@ -439,6 +439,26 @@ SELECT x, y FROM
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SELECT unique2AS x, unique2AS yFROM tenk1 b) s
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ORDER BY x, y;
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-- exercise rescan code path via a repeatedly-evaluated subquery
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explain (costs off)
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SELECT
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(SELECTg.iFROM (
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(SELECT*FROM generate_series(1,2)ORDER BY1)
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UNION ALL
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(SELECT*FROM generate_series(1,2)ORDER BY1)
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) f(i)
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ORDER BYf.iLIMIT1)
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FROM generate_series(1,3) g(i);
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SELECT
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(SELECTg.iFROM (
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(SELECT*FROM generate_series(1,2)ORDER BY1)
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UNION ALL
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(SELECT*FROM generate_series(1,2)ORDER BY1)
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) f(i)
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ORDER BYf.iLIMIT1)
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FROM generate_series(1,3) g(i);
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reset enable_seqscan;
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reset enable_indexscan;
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reset enable_bitmapscan;

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