bdr: Disallow calling setval() on distributed sequences.

We actually allow setval() to be called, as long as it's not changing
values. That's required because the relevant code is called from other
contexts as well.

diff --git a/bdr_seq.c b/bdr_seq.c
index 5fed563a904763f55c7041016a5c269806edd7cb..57c6bbb3f68091ece12561ea4ad6a8366730198d 100644 (file)
--- a/bdr_seq.c
+++ b/bdr_seq.c
@@ -1263,6 +1263,15 @@ bdr_sequence_setval(PG_FUNCTION_ARGS)
    Page        page = BufferGetPage(buf);
    Form_pg_sequence seq = (Form_pg_sequence) GETSTRUCT(seqtuple);
 
+   if (seq->last_value != next ||
+       seq->is_called != iscalled)
+       ereport(ERROR,
+               (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+                errmsg("cannot call setval() on global sequence %s.%s ",
+                       get_namespace_name(RelationGetNamespace(seqrel)),
+                       RelationGetRelationName(seqrel))));
+
+
    /* ready to change the on-disk (or really, in-buffer) tuple */
    START_CRIT_SECTION();