add SYSTEM TRANSFER LEADER command

Author: jovezhong

docs/sql-system-transfer-leader.md

@@ -0,0 +1,16 @@
+# SYSTEM TRANSFER LEADER
+Transfer the leader of a materialized view to another node in the cluster.
+
+```sql
+SYSTEM TRANSFER LEADER [db.]materialized_view_name shard_id FROM source_node_id TO target_node_id;
+```
+
+For example:
+
+```sql
+SYSTEM TRANSFER LEADER mv1 0 FROM 3 TO 1;
+```
+
+:::info
+This feature is only available in Timeplus Enterprise v2.5.x or above. This SQL need to be run on the lead node of the cluster.
+:::

sidebars.js

@@ -351,6 +351,7 @@ const sidebars = {
             "sql-show-streams",
             "sql-system-pause",
             "sql-system-resume",
+            "sql-system-transfer-leader",
             "sql-truncate-stream",
             "sql-use",
           ],