Justin Pryzby <pry...@telsasoft.com> writes:
> On Fri, Jul 10, 2020 at 04:54:40PM -0400, Tom Lane wrote:
>> This works about 99% of the time, in fact.  It falls down in the --clean

> Note that this fails for me (sometimes) even without --clean.

Oh, I was thinking that REVOKE would only be issued in the --clean
case, but apparently that's not so.  Doesn't really affect the fix
proposal though.  I just finished a patch for HEAD, as attached.

(I flushed the "CatalogId objCatId" argument of dumpACL, which was
not used.)

I'm not sure how far to back-patch it -- I think the parallel restore
of ACLs behavior is not very old, but we might want to teach older
pg_dump versions to insert the extra dependency anyway, for safety.

                        regards, tom lane

diff --git a/src/bin/pg_dump/common.c b/src/bin/pg_dump/common.c
index 4ea59f5494..08239dde4f 100644
--- a/src/bin/pg_dump/common.c
+++ b/src/bin/pg_dump/common.c
@@ -28,7 +28,7 @@
  */
 static DumpableObject **dumpIdMap = NULL;
 static int	allocedDumpIds = 0;
-static DumpId lastDumpId = 0;
+static DumpId lastDumpId = 0;	/* Note: 0 is InvalidDumpId */
 
 /*
  * Variables for mapping CatalogId to DumpableObject
diff --git a/src/bin/pg_dump/pg_backup.h b/src/bin/pg_dump/pg_backup.h
index b17c9dbb8b..1017abbbe5 100644
--- a/src/bin/pg_dump/pg_backup.h
+++ b/src/bin/pg_dump/pg_backup.h
@@ -233,6 +233,12 @@ typedef struct
 
 typedef int DumpId;
 
+#define InvalidDumpId 0
+
+/*
+ * Function pointer prototypes for assorted callback methods.
+ */
+
 typedef int (*DataDumperPtr) (Archive *AH, void *userArg);
 
 typedef void (*SetupWorkerPtrType) (Archive *AH);
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index 8bca147a33..e758b5c50a 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -220,11 +220,11 @@ static void dumpUserMappings(Archive *fout,
 							 const char *owner, CatalogId catalogId, DumpId dumpId);
 static void dumpDefaultACL(Archive *fout, DefaultACLInfo *daclinfo);
 
-static void dumpACL(Archive *fout, CatalogId objCatId, DumpId objDumpId,
-					const char *type, const char *name, const char *subname,
-					const char *nspname, const char *owner,
-					const char *acls, const char *racls,
-					const char *initacls, const char *initracls);
+static DumpId dumpACL(Archive *fout, DumpId objDumpId, DumpId altDumpId,
+					  const char *type, const char *name, const char *subname,
+					  const char *nspname, const char *owner,
+					  const char *acls, const char *racls,
+					  const char *initacls, const char *initracls);
 
 static void getDependencies(Archive *fout);
 static void BuildArchiveDependencies(Archive *fout);
@@ -2992,7 +2992,7 @@ dumpDatabase(Archive *fout)
 	 * Dump ACL if any.  Note that we do not support initial privileges
 	 * (pg_init_privs) on databases.
 	 */
-	dumpACL(fout, dbCatId, dbDumpId, "DATABASE",
+	dumpACL(fout, dbDumpId, InvalidDumpId, "DATABASE",
 			qdatname, NULL, NULL,
 			dba, datacl, rdatacl, "", "");
 
@@ -3477,7 +3477,7 @@ dumpBlob(Archive *fout, BlobInfo *binfo)
 
 	/* Dump ACL if any */
 	if (binfo->blobacl && (binfo->dobj.dump & DUMP_COMPONENT_ACL))
-		dumpACL(fout, binfo->dobj.catId, binfo->dobj.dumpId, "LARGE OBJECT",
+		dumpACL(fout, binfo->dobj.dumpId, InvalidDumpId, "LARGE OBJECT",
 				binfo->dobj.name, NULL,
 				NULL, binfo->rolname, binfo->blobacl, binfo->rblobacl,
 				binfo->initblobacl, binfo->initrblobacl);
@@ -10155,7 +10155,7 @@ dumpNamespace(Archive *fout, NamespaceInfo *nspinfo)
 					 nspinfo->dobj.catId, 0, nspinfo->dobj.dumpId);
 
 	if (nspinfo->dobj.dump & DUMP_COMPONENT_ACL)
-		dumpACL(fout, nspinfo->dobj.catId, nspinfo->dobj.dumpId, "SCHEMA",
+		dumpACL(fout, nspinfo->dobj.dumpId, InvalidDumpId, "SCHEMA",
 				qnspname, NULL, NULL,
 				nspinfo->rolname, nspinfo->nspacl, nspinfo->rnspacl,
 				nspinfo->initnspacl, nspinfo->initrnspacl);
@@ -10439,7 +10439,7 @@ dumpEnumType(Archive *fout, TypeInfo *tyinfo)
 					 tyinfo->dobj.catId, 0, tyinfo->dobj.dumpId);
 
 	if (tyinfo->dobj.dump & DUMP_COMPONENT_ACL)
-		dumpACL(fout, tyinfo->dobj.catId, tyinfo->dobj.dumpId, "TYPE",
+		dumpACL(fout, tyinfo->dobj.dumpId, InvalidDumpId, "TYPE",
 				qtypname, NULL,
 				tyinfo->dobj.namespace->dobj.name,
 				tyinfo->rolname, tyinfo->typacl, tyinfo->rtypacl,
@@ -10565,7 +10565,7 @@ dumpRangeType(Archive *fout, TypeInfo *tyinfo)
 					 tyinfo->dobj.catId, 0, tyinfo->dobj.dumpId);
 
 	if (tyinfo->dobj.dump & DUMP_COMPONENT_ACL)
-		dumpACL(fout, tyinfo->dobj.catId, tyinfo->dobj.dumpId, "TYPE",
+		dumpACL(fout, tyinfo->dobj.dumpId, InvalidDumpId, "TYPE",
 				qtypname, NULL,
 				tyinfo->dobj.namespace->dobj.name,
 				tyinfo->rolname, tyinfo->typacl, tyinfo->rtypacl,
@@ -10637,7 +10637,7 @@ dumpUndefinedType(Archive *fout, TypeInfo *tyinfo)
 					 tyinfo->dobj.catId, 0, tyinfo->dobj.dumpId);
 
 	if (tyinfo->dobj.dump & DUMP_COMPONENT_ACL)
-		dumpACL(fout, tyinfo->dobj.catId, tyinfo->dobj.dumpId, "TYPE",
+		dumpACL(fout, tyinfo->dobj.dumpId, InvalidDumpId, "TYPE",
 				qtypname, NULL,
 				tyinfo->dobj.namespace->dobj.name,
 				tyinfo->rolname, tyinfo->typacl, tyinfo->rtypacl,
@@ -10918,7 +10918,7 @@ dumpBaseType(Archive *fout, TypeInfo *tyinfo)
 					 tyinfo->dobj.catId, 0, tyinfo->dobj.dumpId);
 
 	if (tyinfo->dobj.dump & DUMP_COMPONENT_ACL)
-		dumpACL(fout, tyinfo->dobj.catId, tyinfo->dobj.dumpId, "TYPE",
+		dumpACL(fout, tyinfo->dobj.dumpId, InvalidDumpId, "TYPE",
 				qtypname, NULL,
 				tyinfo->dobj.namespace->dobj.name,
 				tyinfo->rolname, tyinfo->typacl, tyinfo->rtypacl,
@@ -11074,7 +11074,7 @@ dumpDomain(Archive *fout, TypeInfo *tyinfo)
 					 tyinfo->dobj.catId, 0, tyinfo->dobj.dumpId);
 
 	if (tyinfo->dobj.dump & DUMP_COMPONENT_ACL)
-		dumpACL(fout, tyinfo->dobj.catId, tyinfo->dobj.dumpId, "TYPE",
+		dumpACL(fout, tyinfo->dobj.dumpId, InvalidDumpId, "TYPE",
 				qtypname, NULL,
 				tyinfo->dobj.namespace->dobj.name,
 				tyinfo->rolname, tyinfo->typacl, tyinfo->rtypacl,
@@ -11296,7 +11296,7 @@ dumpCompositeType(Archive *fout, TypeInfo *tyinfo)
 					 tyinfo->dobj.catId, 0, tyinfo->dobj.dumpId);
 
 	if (tyinfo->dobj.dump & DUMP_COMPONENT_ACL)
-		dumpACL(fout, tyinfo->dobj.catId, tyinfo->dobj.dumpId, "TYPE",
+		dumpACL(fout, tyinfo->dobj.dumpId, InvalidDumpId, "TYPE",
 				qtypname, NULL,
 				tyinfo->dobj.namespace->dobj.name,
 				tyinfo->rolname, tyinfo->typacl, tyinfo->rtypacl,
@@ -11596,7 +11596,7 @@ dumpProcLang(Archive *fout, ProcLangInfo *plang)
 					 plang->dobj.catId, 0, plang->dobj.dumpId);
 
 	if (plang->lanpltrusted && plang->dobj.dump & DUMP_COMPONENT_ACL)
-		dumpACL(fout, plang->dobj.catId, plang->dobj.dumpId, "LANGUAGE",
+		dumpACL(fout, plang->dobj.dumpId, InvalidDumpId, "LANGUAGE",
 				qlanname, NULL, NULL,
 				plang->lanowner, plang->lanacl, plang->rlanacl,
 				plang->initlanacl, plang->initrlanacl);
@@ -12306,7 +12306,7 @@ dumpFunc(Archive *fout, FuncInfo *finfo)
 					 finfo->dobj.catId, 0, finfo->dobj.dumpId);
 
 	if (finfo->dobj.dump & DUMP_COMPONENT_ACL)
-		dumpACL(fout, finfo->dobj.catId, finfo->dobj.dumpId, keyword,
+		dumpACL(fout, finfo->dobj.dumpId, InvalidDumpId, keyword,
 				funcsig, NULL,
 				finfo->dobj.namespace->dobj.name,
 				finfo->rolname, finfo->proacl, finfo->rproacl,
@@ -14304,7 +14304,7 @@ dumpAgg(Archive *fout, AggInfo *agginfo)
 	aggsig = format_function_signature(fout, &agginfo->aggfn, true);
 
 	if (agginfo->aggfn.dobj.dump & DUMP_COMPONENT_ACL)
-		dumpACL(fout, agginfo->aggfn.dobj.catId, agginfo->aggfn.dobj.dumpId,
+		dumpACL(fout, agginfo->aggfn.dobj.dumpId, InvalidDumpId,
 				"FUNCTION", aggsig, NULL,
 				agginfo->aggfn.dobj.namespace->dobj.name,
 				agginfo->aggfn.rolname, agginfo->aggfn.proacl,
@@ -14706,7 +14706,7 @@ dumpForeignDataWrapper(Archive *fout, FdwInfo *fdwinfo)
 
 	/* Handle the ACL */
 	if (fdwinfo->dobj.dump & DUMP_COMPONENT_ACL)
-		dumpACL(fout, fdwinfo->dobj.catId, fdwinfo->dobj.dumpId,
+		dumpACL(fout, fdwinfo->dobj.dumpId, InvalidDumpId,
 				"FOREIGN DATA WRAPPER", qfdwname, NULL,
 				NULL, fdwinfo->rolname,
 				fdwinfo->fdwacl, fdwinfo->rfdwacl,
@@ -14795,7 +14795,7 @@ dumpForeignServer(Archive *fout, ForeignServerInfo *srvinfo)
 
 	/* Handle the ACL */
 	if (srvinfo->dobj.dump & DUMP_COMPONENT_ACL)
-		dumpACL(fout, srvinfo->dobj.catId, srvinfo->dobj.dumpId,
+		dumpACL(fout, srvinfo->dobj.dumpId, InvalidDumpId,
 				"FOREIGN SERVER", qsrvname, NULL,
 				NULL, srvinfo->rolname,
 				srvinfo->srvacl, srvinfo->rsrvacl,
@@ -14988,8 +14988,9 @@ dumpDefaultACL(Archive *fout, DefaultACLInfo *daclinfo)
 /*----------
  * Write out grant/revoke information
  *
- * 'objCatId' is the catalog ID of the underlying object.
  * 'objDumpId' is the dump ID of the underlying object.
+ * 'altDumpId' can be a second dumpId that the ACL entry must also depend on,
+ *		or InvalidDumpId if there is no need for a second dependency.
  * 'type' must be one of
  *		TABLE, SEQUENCE, FUNCTION, LANGUAGE, SCHEMA, DATABASE, TABLESPACE,
  *		FOREIGN DATA WRAPPER, SERVER, or LARGE OBJECT.
@@ -15012,25 +15013,29 @@ dumpDefaultACL(Archive *fout, DefaultACLInfo *daclinfo)
  * NB: initacls/initracls are needed because extensions can set privileges on
  * an object during the extension's script file and we record those into
  * pg_init_privs as that object's initial privileges.
+ *
+ * Returns the dump ID assigned to the ACL TocEntry, or InvalidDumpId if
+ * no ACL entry was created.
  *----------
  */
-static void
-dumpACL(Archive *fout, CatalogId objCatId, DumpId objDumpId,
+static DumpId
+dumpACL(Archive *fout, DumpId objDumpId, DumpId altDumpId,
 		const char *type, const char *name, const char *subname,
 		const char *nspname, const char *owner,
 		const char *acls, const char *racls,
 		const char *initacls, const char *initracls)
 {
+	DumpId		aclDumpId = InvalidDumpId;
 	DumpOptions *dopt = fout->dopt;
 	PQExpBuffer sql;
 
 	/* Do nothing if ACL dump is not enabled */
 	if (dopt->aclsSkip)
-		return;
+		return InvalidDumpId;
 
 	/* --data-only skips ACLs *except* BLOB ACLs */
 	if (dopt->dataOnly && strcmp(type, "LARGE OBJECT") != 0)
-		return;
+		return InvalidDumpId;
 
 	sql = createPQExpBuffer();
 
@@ -15062,25 +15067,36 @@ dumpACL(Archive *fout, CatalogId objCatId, DumpId objDumpId,
 	if (sql->len > 0)
 	{
 		PQExpBuffer tag = createPQExpBuffer();
+		DumpId		aclDeps[2];
+		int			nDeps = 0;
 
 		if (subname)
 			appendPQExpBuffer(tag, "COLUMN %s.%s", name, subname);
 		else
 			appendPQExpBuffer(tag, "%s %s", type, name);
 
-		ArchiveEntry(fout, nilCatalogId, createDumpId(),
+		aclDeps[nDeps++] = objDumpId;
+		if (altDumpId != InvalidDumpId)
+			aclDeps[nDeps++] = altDumpId;
+
+		aclDumpId = createDumpId();
+
+		ArchiveEntry(fout, nilCatalogId, aclDumpId,
 					 ARCHIVE_OPTS(.tag = tag->data,
 								  .namespace = nspname,
 								  .owner = owner,
 								  .description = "ACL",
 								  .section = SECTION_NONE,
 								  .createStmt = sql->data,
-								  .deps = &objDumpId,
-								  .nDeps = 1));
+								  .deps = aclDeps,
+								  .nDeps = nDeps));
+
 		destroyPQExpBuffer(tag);
 	}
 
 	destroyPQExpBuffer(sql);
+
+	return aclDumpId;
 }
 
 /*
@@ -15406,6 +15422,7 @@ static void
 dumpTable(Archive *fout, TableInfo *tbinfo)
 {
 	DumpOptions *dopt = fout->dopt;
+	DumpId		tableAclDumpId = InvalidDumpId;
 	char	   *namecopy;
 
 	/*
@@ -15427,11 +15444,12 @@ dumpTable(Archive *fout, TableInfo *tbinfo)
 		const char *objtype =
 		(tbinfo->relkind == RELKIND_SEQUENCE) ? "SEQUENCE" : "TABLE";
 
-		dumpACL(fout, tbinfo->dobj.catId, tbinfo->dobj.dumpId,
-				objtype, namecopy, NULL,
-				tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
-				tbinfo->relacl, tbinfo->rrelacl,
-				tbinfo->initrelacl, tbinfo->initrrelacl);
+		tableAclDumpId =
+			dumpACL(fout, tbinfo->dobj.dumpId, InvalidDumpId,
+					objtype, namecopy, NULL,
+					tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
+					tbinfo->relacl, tbinfo->rrelacl,
+					tbinfo->initrelacl, tbinfo->initrrelacl);
 	}
 
 	/*
@@ -15515,8 +15533,13 @@ dumpTable(Archive *fout, TableInfo *tbinfo)
 			char	   *attnamecopy;
 
 			attnamecopy = pg_strdup(fmtId(attname));
-			/* Column's GRANT type is always TABLE */
-			dumpACL(fout, tbinfo->dobj.catId, tbinfo->dobj.dumpId,
+
+			/*
+			 * Column's GRANT type is always TABLE.  Each column ACL depends
+			 * on the table-level ACL, since we can restore column ACLs in
+			 * parallel but the table-level ACL has to be done first.
+			 */
+			dumpACL(fout, tbinfo->dobj.dumpId, tableAclDumpId,
 					"TABLE", namecopy, attnamecopy,
 					tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					attacl, rattacl, initattacl, initrattacl);

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