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pg_upgrade: force timeline 1 in the new cluster

Previously, this prevented promoted standby servers from being upgradedbecause of a missing WAL history file. (Timeline 1 doesn't need ahistory file, and we don't copy WAL files anyway.)Report by Christian Echerer(?), Alexey KlyukinBackpatch through 9.0

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contrib/pg_upgrade
- pg_upgrade.c

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`‎contrib/pg_upgrade/pg_upgrade.c`

Lines changed: 3 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -659,8 +659,9 @@ copy_clog_xlog_xid(void)`
`659`	`659`	`/* now reset the wal archives in the new cluster */`
`660`	`660`	`prep_status("Resetting WAL archives");`
`661`	`661`	`exec_prog(UTILITY_LOG_FILE,NULL, true,`
`662`		`-"\"%s/pg_resetxlog\" -l %s \"%s\"",new_cluster.bindir,`
`663`		`-old_cluster.controldata.nextxlogfile,`
	`662`	`+/* use timeline 1 to match controldata and no WAL history file */`
	`663`	`+"\"%s/pg_resetxlog\" -l 00000001%s \"%s\"",new_cluster.bindir,`
	`664`	`+old_cluster.controldata.nextxlogfile+8,`
`664`	`665`	`new_cluster.pgdata);`
`665`	`666`	`check_ok();`
`666`	`667`	`}`

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Commitbffbeec

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`‎contrib/pg_upgrade/pg_upgrade.c`

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