From: Andres Freund <andres@anarazel.de>
Date: Wed, 29 Jan 2014 16:04:12 +0000 (+0100)
Subject: Return nulls instead of InvalidTransactionId/InvalidXLogRecPtr in pg_replication_slots
X-Git-Url: http://git.postgresql.org/gitweb/?a=commitdiff_plain;h=37ee83c608866f0bb687c3ca7e52e1d6edab091c;p=users%2Frhaas%2Fpostgres.git

Return nulls instead of InvalidTransactionId/InvalidXLogRecPtr in pg_replication_slots
---

diff --git a/src/backend/replication/slotfuncs.c b/src/backend/replication/slotfuncs.c
index dba06a1061..aa44826d09 100644
--- a/src/backend/replication/slotfuncs.c
+++ b/src/backend/replication/slotfuncs.c
@@ -175,8 +175,14 @@ pg_get_replication_slots(PG_FUNCTION_ARGS)
 			values[i++] = CStringGetTextDatum("logical");
 		values[i++] = database;
 		values[i++] = BoolGetDatum(active);
-		values[i++] = TransactionIdGetDatum(data_xmin);
-		values[i++] = CStringGetTextDatum(restart_lsn_s);
+		if (data_xmin != InvalidTransactionId)
+			values[i++] = TransactionIdGetDatum(data_xmin);
+		else
+			nulls[i++] = true;
+		if (restart_lsn != InvalidTransactionId)
+			values[i++] = CStringGetTextDatum(restart_lsn_s);
+		else
+			nulls[i++] = true;
 
 		tuplestore_putvalues(tupstore, tupdesc, values, nulls);
 	}