Fix assorted confusion between Oid and int32.

In passing, also make some debugging elog's in pgstat.c a bit more
consistently worded.

Back-patch as far as applicable (9.3 or 9.4; none of these mistakes are
really old).

Mark Dilger identified and patched the type violations; the message
rewordings are mine.

src/backend/access/heap/tuptoaster.c

@@ -2155,7 +2155,7 @@ toast_open_indexes(Relation toastrel,
 	 * wrong if there is nothing.
 	 */
 	if (!found)
-		elog(ERROR, "no valid index found for toast relation with Oid %d",
+		elog(ERROR, "no valid index found for toast relation with Oid %u",
 			 RelationGetRelid(toastrel));
 
 	return res;

src/backend/postmaster/pgstat.c

@@ -3600,7 +3600,7 @@ pgstat_write_statsfiles(bool permanent, bool allDbs)
 	const char *statfile = permanent ? PGSTAT_STAT_PERMANENT_FILENAME : pgstat_stat_filename;
 	int			rc;
 
-	elog(DEBUG2, "writing statsfile '%s'", statfile);
+	elog(DEBUG2, "writing stats file \"%s\"", statfile);
 
 	/*
 	 * Open the statistics temp file to write out the current values.
@@ -3777,7 +3777,7 @@ pgstat_write_db_statsfile(PgStat_StatDBEntry *dbentry, bool permanent)
 	get_dbstat_filename(permanent, true, dbid, tmpfile, MAXPGPATH);
 	get_dbstat_filename(permanent, false, dbid, statfile, MAXPGPATH);
 
-	elog(DEBUG2, "writing statsfile '%s'", statfile);
+	elog(DEBUG2, "writing stats file \"%s\"", statfile);
 
 	/*
 	 * Open the statistics temp file to write out the current values.
@@ -3858,7 +3858,7 @@ pgstat_write_db_statsfile(PgStat_StatDBEntry *dbentry, bool permanent)
 	{
 		get_dbstat_filename(false, false, dbid, statfile, MAXPGPATH);
 
-		elog(DEBUG2, "removing temporary stat file '%s'", statfile);
+		elog(DEBUG2, "removing temporary stats file \"%s\"", statfile);
 		unlink(statfile);
 	}
 }
@@ -4070,7 +4070,7 @@ done:
 	/* If requested to read the permanent file, also get rid of it. */
 	if (permanent)
 	{
-		elog(DEBUG2, "removing permanent stats file '%s'", statfile);
+		elog(DEBUG2, "removing permanent stats file \"%s\"", statfile);
 		unlink(statfile);
 	}
 
@@ -4228,7 +4228,7 @@ done:
 
 	if (permanent)
 	{
-		elog(DEBUG2, "removing permanent stats file '%s'", statfile);
+		elog(DEBUG2, "removing permanent stats file \"%s\"", statfile);
 		unlink(statfile);
 	}
 
@@ -4540,7 +4540,7 @@ pgstat_recv_inquiry(PgStat_MsgInquiry *msg, int len)
 	DBWriteRequest *newreq;
 	PgStat_StatDBEntry *dbentry;
 
-	elog(DEBUG2, "received inquiry for %d", msg->databaseid);
+	elog(DEBUG2, "received inquiry for database %u", msg->databaseid);
 
 	/*
 	 * Find the last write request for this DB.  If it's older than the
@@ -4598,7 +4598,7 @@ pgstat_recv_inquiry(PgStat_MsgInquiry *msg, int len)
 			writetime = pstrdup(timestamptz_to_str(dbentry->stats_timestamp));
 			mytime = pstrdup(timestamptz_to_str(cur_ts));
 			elog(LOG,
-			"stats_timestamp %s is later than collector's time %s for db %d",
+				 "stats_timestamp %s is later than collector's time %s for database %u",
 				 writetime, mytime, dbentry->databaseid);
 			pfree(writetime);
 			pfree(mytime);
@@ -4770,7 +4770,7 @@ pgstat_recv_dropdb(PgStat_MsgDropdb *msg, int len)
 
 		get_dbstat_filename(false, false, dbid, statfile, MAXPGPATH);
 
-		elog(DEBUG2, "removing %s", statfile);
+		elog(DEBUG2, "removing stats file \"%s\"", statfile);
 		unlink(statfile);
 
 		if (dbentry->tables != NULL)

src/backend/replication/logical/reorderbuffer.c

@@ -2458,7 +2458,7 @@ ReorderBufferToastAppendChunk(ReorderBuffer *rb, ReorderBufferTXN *txn,
 	Pointer		chunk;
 	TupleDesc	desc = RelationGetDescr(relation);
 	Oid			chunk_id;
-	Oid			chunk_seq;
+	int32		chunk_seq;
 
 	if (txn->toast_hash == NULL)
 		ReorderBufferToastInitHash(rb, txn);

src/bin/pg_dump/parallel.c

@@ -821,7 +821,7 @@ lockTableNoWait(ArchiveHandle *AH, TocEntry *te)
 					  "       pg_class.relname "
 					  "  FROM pg_class "
 					"  JOIN pg_namespace on pg_namespace.oid = relnamespace "
-					  " WHERE pg_class.oid = %d", te->catalogId.oid);
+					  " WHERE pg_class.oid = %u", te->catalogId.oid);
 
 	res = PQexec(AH->connection, query->data);