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author Thomas Munro <tmunro@postgresql.org>

2021年1月20日 09:31:26 +0000 (22:31 +1300)

committer Thomas Munro <tmunro@postgresql.org>

2021年1月20日 09:38:24 +0000 (22:38 +1300)

Since commit f0f13a3a08b2757997410f3a1c38bdc22973c525, we estimate
ModifyTable paths without a RETURNING clause differently. Update an
example from the manual that showed the old behavior.

Author: Takayuki Tsunakawa <tsunakawa.takay@fujitsu.com>
Reviewed-by: Laurenz Albe <laurenz.albe@cybertec.at>
Discussion: https://postgr.es/m/TYAPR01MB29905674F41693BBA9DA28CAFEA20%40TYAPR01MB2990.jpnprd01.prod.outlook.com

doc/src/sgml/perform.sgml patch | blob | blame | history

diff --git a/doc/src/sgml/perform.sgml b/doc/src/sgml/perform.sgml

index 117a1f7ff92a696970e3e498689e2f69e7639a53..aca1fe86a7c80852ae847d0968c7ead14120e568 100644 (file)

--- a/doc/src/sgml/perform.sgml

+++ b/doc/src/sgml/perform.sgml

@@ -773,7 +773,7 @@ EXPLAIN ANALYZE UPDATE tenk1 SET hundred = hundred + 1 WHERE unique1 < 100;

QUERY PLAN

-------------------------------------------------------------------&zwsp;-------------------------------------------------------------

- Update on tenk1 (cost=5.07..229.46 rows=101 width=250) (actual time=14.628..14.628 rows=0 loops=1)

+ Update on tenk1 (cost=5.07..229.46 rows=0 width=0) (actual time=14.628..14.628 rows=0 loops=1)

-> Bitmap Heap Scan on tenk1 (cost=5.07..229.46 rows=101 width=250) (actual time=0.101..0.439 rows=100 loops=1)

Recheck Cond: (unique1 < 100)

-> Bitmap Index Scan on tenk1_unique1 (cost=0.00..5.04 rows=101 width=0) (actual time=0.043..0.043 rows=100 loops=1)

@@ -809,7 +809,7 @@ ROLLBACK;

EXPLAIN UPDATE parent SET f2 = f2 + 1 WHERE f1 = 101;

QUERY PLAN

-------------------------------------------------------------------&zwsp;----------------

- Update on parent (cost=0.00..24.53 rows=4 width=14)

+ Update on parent (cost=0.00..24.53 rows=0 width=0)

Update on parent

Update on child1

Update on child2

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