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Fix unstable aggregate regression test

Buildfarm member avocet has shown a plan change by switching thefinalize aggregate stage to use a GroupAggregate rather than aHashAggregate. This is consistent with autovacuum having triggered onthe table, per analysis by Alexander Lakhin.Fix this by disabling autovacuum on the table.Reported-by: Alexander LakhinDiscussion:https://postgr.es/m/d4493a28-589a-5328-fed5-250f2d7d3e2a@gmail.comBackpatch-through: 16, where this test was added.

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src/test/regress
- expected
  - aggregates.out
- sql
  - aggregates.sql

2 files changed

-2

lines changed

`‎src/test/regress/expected/aggregates.out`

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -1930,7 +1930,7 @@ select string_agg(v, decode('ee', 'hex')) from bytea_test_table;`
`1930`	`1930`
`1931`	`1931`	`drop table bytea_test_table;`
`1932`	`1932`	`-- Test parallel string_agg and array_agg`
`1933`		`-create table pagg_test (x int, y int);`
	`1933`	`+create table pagg_test (x int, y int) with (autovacuum_enabled = off);`
`1934`	`1934`	`insert into pagg_test`
`1935`	`1935`	`select (case x % 4 when 1 then null else x end), x % 10`
`1936`	`1936`	`from generate_series(1,5000) x;`

`‎src/test/regress/sql/aggregates.sql`

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -749,7 +749,7 @@ select string_agg(v, decode('ee', 'hex')) from bytea_test_table;`
`749`	`749`	`droptable bytea_test_table;`
`750`	`750`
`751`	`751`	`-- Test parallel string_agg and array_agg`
`752`		`-createtablepagg_test (xint, yint);`
	`752`	`+createtablepagg_test (xint, yint) with (autovacuum_enabled= off);`
`753`	`753`	`insert into pagg_test`
`754`	`754`	`select (case x %4 when1 thennull else x end), x %10`
`755`	`755`	`from generate_series(1,5000) x;`

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Commitd6a6957

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2 files changed

2 files changed

`‎src/test/regress/expected/aggregates.out`

`‎src/test/regress/sql/aggregates.sql`

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