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cluster show: don't display witness node timeline ID

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The witness node is not part of the replication cluster, so its timeline
ID is not of any relevance.
This commit is contained in:
Ian Barwick
2020-02-25 10:33:54 +09:00
parent 3b03edebb6
commit 76af2d9e08
3 changed files with 36 additions and 30 deletions
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40
dbutils.c
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@@ -5456,31 +5456,43 @@ get_replication_lag_seconds(PGconn *conn)
TimeLineID
get_node_timeline(PGconn *conn)
get_node_timeline(PGconn *conn, char *timeline_id_str)
{
TimeLineID timeline_id = UNKNOWN_TIMELINE_ID;
PGresult *res = NULL;
/*
* PG_control_checkpoint() was introduced in PostgreSQL 9.6
*/
if (PQserverVersion(conn) < 90600)
if (PQserverVersion(conn) >= 90600)
{
return UNKNOWN_TIMELINE_ID;
PGresult *res = NULL;
res = PQexec(conn, "SELECT timeline_id FROM pg_catalog.pg_control_checkpoint()");
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
log_db_error(conn, NULL, _("get_node_timeline(): unable to query pg_control_system()"));
}
else
{
timeline_id = atoi(PQgetvalue(res, 0, 0));
}
PQclear(res);
}
res = PQexec(conn, "SELECT timeline_id FROM pg_catalog.pg_control_checkpoint()");
if (PQresultStatus(res) != PGRES_TUPLES_OK)
/* If requested, format the timeline ID as a string */
if (timeline_id_str != NULL)
{
log_db_error(conn, NULL, _("get_node_timeline(): unable to query pg_control_system()"));
if (timeline_id == UNKNOWN_TIMELINE_ID)
{
strncpy(timeline_id_str, "?", MAXLEN);
}
else
{
snprintf(timeline_id_str, MAXLEN, "%i", timeline_id);
}
}
else
{
timeline_id = atoi(PQgetvalue(res, 0, 0));
}
PQclear(res);
return timeline_id;
}