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fsync pg_logical/mappings in CheckPointLogicalRewriteHeap().

While individual logical rewrite files were synced to disk, the directory wasnot. On some filesystems that could lead to loosing directory entries after acrash.Reported-By: Tom Lane <tgl@sss.pgh.pa.us>Author: Nathan Bossart <bossartn@amazon.com>Discussion:https://postgr.es/m/867F2E29-2782-4869-970E-B984C6D35A8F@amazon.comBackpatch: 10-

1 parent1c0452c commit1c6d055Copy full SHA for 1c6d055

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src/backend/access/heap
- rewriteheap.c

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`‎src/backend/access/heap/rewriteheap.c`

Lines changed: 3 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1312,4 +1312,7 @@ CheckPointLogicalRewriteHeap(void)`
`1312`	`1312`	`}`
`1313`	`1313`	`}`
`1314`	`1314`	`FreeDir(mappings_dir);`
	`1315`	`+`
	`1316`	`+/* persist directory entries to disk */`
	`1317`	`+fsync_fname("pg_logical/mappings", true);`
`1315`	`1318`	`}`

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Commit1c6d055

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`‎src/backend/access/heap/rewriteheap.c`

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