FRONTENDS

frontends

Name

frontends

description

Table-Value-Function, generate a temporary table named frontends. This tvf is used to view the information of BE nodes in the doris cluster.

This function is used in FROM clauses.

syntax

frontends()

The table schema of frontends() tvf：

mysql> desc function frontends();
+-------------------+------+------+-------+---------+-------+
| Field             | Type | Null | Key   | Default | Extra |
+-------------------+------+------+-------+---------+-------+
| Name              | TEXT | No   | false | NULL    | NONE  |
| Host              | TEXT | No   | false | NULL    | NONE  |
| EditLogPort       | TEXT | No   | false | NULL    | NONE  |
| HttpPort          | TEXT | No   | false | NULL    | NONE  |
| QueryPort         | TEXT | No   | false | NULL    | NONE  |
| RpcPort           | TEXT | No   | false | NULL    | NONE  |
| ArrowFlightSqlPort| TEXT | No   | false | NULL    | NONE  |
| Role              | TEXT | No   | false | NULL    | NONE  |
| IsMaster          | TEXT | No   | false | NULL    | NONE  |
| ClusterId         | TEXT | No   | false | NULL    | NONE  |
| Join              | TEXT | No   | false | NULL    | NONE  |
| Alive             | TEXT | No   | false | NULL    | NONE  |
| ReplayedJournalId | TEXT | No   | false | NULL    | NONE  |
| LastHeartbeat     | TEXT | No   | false | NULL    | NONE  |
| IsHelper          | TEXT | No   | false | NULL    | NONE  |
| ErrMsg            | TEXT | No   | false | NULL    | NONE  |
| Version           | TEXT | No   | false | NULL    | NONE  |
| CurrentConnected  | TEXT | No   | false | NULL    | NONE  |
+-------------------+------+------+-------+---------+-------+
17 rows in set (0.022 sec)

The information displayed by the frontends tvf is basically consistent with the information displayed by the show frontends statement. However, the types of each field in the frontends tvf are more specific, and you can use the frontends tvf to perform operations such as filtering and joining.

The information displayed by the frontends tvf is authenticated, which is consistent with the behavior of show frontends, user must have ADMIN/OPERATOR privelege.

example

mysql> select * from frontends()\G
*************************** 1. row ***************************
             Name: fe_5fa8bf19_fd6b_45cb_89c5_25a5ebc45582
               IP: 10.xx.xx.14
      EditLogPort: 9013
         HttpPort: 8034
        QueryPort: 9033
          RpcPort: 9023
ArrowFlightSqlPort: 9040
             Role: FOLLOWER
         IsMaster: true
        ClusterId: 1258341841
             Join: true
            Alive: true
ReplayedJournalId: 186
    LastHeartbeat: 2023-06-15 16:53:12
         IsHelper: true
           ErrMsg: 
          Version: doris-0.0.0-trunk-4b18cde0c7
 CurrentConnected: Yes
1 row in set (0.060 sec)

keywords

frontends