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repmgrd: store upstream node ID in shared memory

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This commit is contained in:
Ian Barwick
2019-04-04 14:55:25 +09:00
parent 5a8741199f
commit 008bd00a59
6 changed files with 86 additions and 8 deletions
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32
dbutils.c
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@@ -1940,6 +1940,31 @@ get_wal_receiver_pid(PGconn *conn)
return wal_receiver_pid;
}
int
repmgrd_get_upstream_node_id(PGconn *conn)
{
PGresult *res = NULL;
int upstream_node_id = UNKNOWN_NODE_ID;
const char *sqlquery = "SELECT repmgr.get_upstream_node_id()";
res = PQexec(conn, sqlquery);
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
log_db_error(conn, sqlquery, _("repmgrd_get_upstream_node_id(): unable to execute query"));
}
else if (!PQgetisnull(res, 0, 0))
{
upstream_node_id = atoi(PQgetvalue(res, 0, 0));
}
PQclear(res);
return upstream_node_id;
}
/* ================ */
/* result functions */
/* ================ */
@@ -5234,15 +5259,16 @@ is_downstream_node_attached(PGconn *conn, char *node_name)
void
set_upstream_last_seen(PGconn *conn)
set_upstream_last_seen(PGconn *conn, int upstream_node_id)
{
PQExpBufferData query;
PGresult *res = NULL;
initPQExpBuffer(&query);
appendPQExpBufferStr(&query,
"SELECT repmgr.set_upstream_last_seen()");
appendPQExpBuffer(&query,
"SELECT repmgr.set_upstream_last_seen(%i)",
upstream_node_id);
res = PQexec(conn, query.data);