pg_upgrade: Upgrade sequence data via pg_dump

Previously, pg_upgrade migrated sequence data like tables by copying the
on-disk file.  This does not allow any changes in the on-disk format for
sequences.  It's simpler to just have pg_dump set the new sequence
values as it normally does.  To do that, create a hidden submode in
pg_dump that dumps sequence data even when a schema-only dump is
requested, and trigger that submode in binary upgrade mode.  (This new
submode could easily be exposed as a command-line option, but it has
limited use outside of pg_dump and would probably cause some confusion,
so we don't do that at this time.)

Reviewed-by: Anastasia Lubennikova <a.lubennikova@postgrespro.ru>
Reviewed-by: Michael Paquier <michael.paquier@gmail.com>

Author: petere

src/bin/pg_dump/pg_backup.h

@@ -118,6 +118,7 @@ typedef struct _restoreOptions
 
 	bool	   *idWanted;		/* array showing which dump IDs to emit */
 	int			enable_row_security;
+	int			sequence_data;	/* dump sequence data even in schema-only mode */
 } RestoreOptions;
 
 typedef struct _dumpOptions
@@ -160,6 +161,8 @@ typedef struct _dumpOptions
 	bool		outputBlobs;
 	int			outputNoOwner;
 	char	   *outputSuperuser;
+
+	int			sequence_data;	/* dump sequence data even in schema-only mode */
 } DumpOptions;
 
 /*

src/bin/pg_dump/pg_backup_archiver.c

@@ -171,6 +171,7 @@ dumpOptionsFromRestoreOptions(RestoreOptions *ropt)
 	dopt->lockWaitTimeout = ropt->lockWaitTimeout;
 	dopt->include_everything = ropt->include_everything;
 	dopt->enable_row_security = ropt->enable_row_security;
+	dopt->sequence_data = ropt->sequence_data;
 
 	return dopt;
 }
@@ -2855,7 +2856,10 @@ _tocEntryRequired(TocEntry *te, teSection curSection, RestoreOptions *ropt)
 
 	/* Mask it if we only want schema */
 	if (ropt->schemaOnly)
-		res = res & REQ_SCHEMA;
+	{
+		if (!(ropt->sequence_data && strcmp(te->desc, "SEQUENCE SET") == 0))
+			res = res & REQ_SCHEMA;
+	}
 
 	/* Mask it if we only want data */
 	if (ropt->dataOnly)

src/bin/pg_dump/pg_dump.c

@@ -216,7 +216,7 @@ static void addBoundaryDependencies(DumpableObject **dobjs, int numObjs,
 						DumpableObject *boundaryObjs);
 
 static void getDomainConstraints(Archive *fout, TypeInfo *tyinfo);
-static void getTableData(DumpOptions *dopt, TableInfo *tblinfo, int numTables, bool oids);
+static void getTableData(DumpOptions *dopt, TableInfo *tblinfo, int numTables, bool oids, char relkind);
 static void makeTableDataInfo(DumpOptions *dopt, TableInfo *tbinfo, bool oids);
 static void buildMatViewRefreshDependencies(Archive *fout);
 static void getTableDataFKConstraints(void);
@@ -546,6 +546,12 @@ main(int argc, char **argv)
 	if (dopt.column_inserts)
 		dopt.dump_inserts = 1;
 
+	/* Binary upgrade mode implies dumping sequence data even in schema-only
+	 * mode.  This is not exposed as a separate option, but kept separate
+	 * internally for clarity. */
+	if (dopt.binary_upgrade)
+		dopt.sequence_data = 1;
+
 	if (dopt.dataOnly && dopt.schemaOnly)
 	{
 		write_msg(NULL, "options -s/--schema-only and -a/--data-only cannot be used together\n");
@@ -722,12 +728,15 @@ main(int argc, char **argv)
 
 	if (!dopt.schemaOnly)
 	{
-		getTableData(&dopt, tblinfo, numTables, dopt.oids);
+		getTableData(&dopt, tblinfo, numTables, dopt.oids, 0);
 		buildMatViewRefreshDependencies(fout);
 		if (dopt.dataOnly)
 			getTableDataFKConstraints();
 	}
 
+	if (dopt.schemaOnly && dopt.sequence_data)
+		getTableData(&dopt, tblinfo, numTables, dopt.oids, RELKIND_SEQUENCE);
+
 	if (dopt.outputBlobs)
 		getBlobs(fout);
 
@@ -806,6 +815,7 @@ main(int argc, char **argv)
 	ropt->lockWaitTimeout = dopt.lockWaitTimeout;
 	ropt->include_everything = dopt.include_everything;
 	ropt->enable_row_security = dopt.enable_row_security;
+	ropt->sequence_data = dopt.sequence_data;
 
 	if (compressLevel == -1)
 		ropt->compression = 0;
@@ -2039,13 +2049,14 @@ refreshMatViewData(Archive *fout, TableDataInfo *tdinfo)
  *	  set up dumpable objects representing the contents of tables
  */
 static void
-getTableData(DumpOptions *dopt, TableInfo *tblinfo, int numTables, bool oids)
+getTableData(DumpOptions *dopt, TableInfo *tblinfo, int numTables, bool oids, char relkind)
 {
 	int			i;
 
 	for (i = 0; i < numTables; i++)
 	{
-		if (tblinfo[i].dobj.dump & DUMP_COMPONENT_DATA)
+		if (tblinfo[i].dobj.dump & DUMP_COMPONENT_DATA &&
+			(!relkind || tblinfo[i].relkind == relkind))
 			makeTableDataInfo(dopt, &(tblinfo[i]), oids);
 	}
 }

src/bin/pg_upgrade/info.c

@@ -444,7 +444,7 @@ get_rel_infos(ClusterInfo *cluster, DbInfo *dbinfo)
 			 "  SELECT c.oid, 0::oid, 0::oid "
 			 "  FROM pg_catalog.pg_class c JOIN pg_catalog.pg_namespace n "
 			 "         ON c.relnamespace = n.oid "
-			 "  WHERE relkind IN ('r', 'm', 'S') AND "
+			 "  WHERE relkind IN ('r', 'm') AND "
 	/* exclude possible orphaned temp tables */
 			 "    ((n.nspname !~ '^pg_temp_' AND "
 			 "      n.nspname !~ '^pg_toast_temp_' AND "