2020-06-22 08:45:22 +00:00
|
|
|
|
---
|
|
|
|
|
machine_translated: true
|
|
|
|
|
machine_translated_rev: 5decc73b5dc60054f19087d3690c4eb99446a6c3
|
|
|
|
|
---
|
|
|
|
|
|
2021-06-24 12:47:02 +00:00
|
|
|
|
# system.zookeeper {#system-zookeeper}
|
2020-06-22 08:45:22 +00:00
|
|
|
|
|
2021-06-24 12:47:02 +00:00
|
|
|
|
如果未配置ZooKeeper,则该表不存在。 允许从配置中定义的ZooKeeper集群读取数据。
|
|
|
|
|
查询必须具有 ‘path’ WHERE子句中的相等条件。 这是ZooKeeper中您想要获取数据的子路径。
|
2020-06-22 08:45:22 +00:00
|
|
|
|
|
2021-06-24 12:47:02 +00:00
|
|
|
|
查询 `SELECT * FROM system.zookeeper WHERE path = '/clickhouse'` 输出`/clickhouse`节点的对所有子路径的数据。
|
|
|
|
|
要输出所有根节点的数据,使用path= ‘/’.
|
2020-06-22 08:45:22 +00:00
|
|
|
|
如果在指定的路径 ‘path’ 不存在,将引发异常。
|
|
|
|
|
|
2021-02-05 09:46:08 +00:00
|
|
|
|
查询`SELECT * FROM system.zookeeper WHERE path IN ('/', '/clickhouse')` 输出`/` 和 `/clickhouse`节点上所有子节点的数据。
|
|
|
|
|
如果在指定的 ‘path’ 集合中有不存在的路径,将引发异常。
|
|
|
|
|
它可以用来做一批ZooKeeper路径查询。
|
|
|
|
|
|
2020-06-22 08:45:22 +00:00
|
|
|
|
列:
|
|
|
|
|
|
2021-06-24 12:47:02 +00:00
|
|
|
|
- `name` (String) — 节点的名字。
|
|
|
|
|
- `path` (String) — 节点的路径。
|
2021-07-29 15:20:55 +00:00
|
|
|
|
- `value` (String) — 节点的值。
|
2021-06-24 12:47:02 +00:00
|
|
|
|
- `dataLength` (Int32) — 节点的值长度。
|
|
|
|
|
- `numChildren` (Int32) — 子节点的个数。
|
|
|
|
|
- `czxid` (Int64) — 创建该节点的事务ID。
|
|
|
|
|
- `mzxid` (Int64) — 最后修改该节点的事务ID。
|
|
|
|
|
- `pzxid` (Int64) — 最后删除或者增加子节点的事务ID。
|
2021-07-29 15:20:55 +00:00
|
|
|
|
- `ctime` (DateTime) — 节点的创建时间。
|
|
|
|
|
- `mtime` (DateTime) — 节点的最后修改时间。
|
2021-06-24 12:47:02 +00:00
|
|
|
|
- `version` (Int32) — 节点版本:节点被修改的次数。
|
|
|
|
|
- `cversion` (Int32) — 增加或删除子节点的个数。
|
|
|
|
|
- `aversion` (Int32) — ACL的修改次数。
|
|
|
|
|
- `ephemeralOwner` (Int64) — 针对临时节点,拥有该节点的事务ID。
|
2020-06-22 08:45:22 +00:00
|
|
|
|
|
|
|
|
|
示例:
|
|
|
|
|
|
|
|
|
|
``` sql
|
|
|
|
|
SELECT *
|
|
|
|
|
FROM system.zookeeper
|
|
|
|
|
WHERE path = '/clickhouse/tables/01-08/visits/replicas'
|
|
|
|
|
FORMAT Vertical
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
``` text
|
|
|
|
|
Row 1:
|
|
|
|
|
──────
|
|
|
|
|
name: example01-08-1.yandex.ru
|
|
|
|
|
value:
|
|
|
|
|
czxid: 932998691229
|
|
|
|
|
mzxid: 932998691229
|
|
|
|
|
ctime: 2015-03-27 16:49:51
|
|
|
|
|
mtime: 2015-03-27 16:49:51
|
|
|
|
|
version: 0
|
|
|
|
|
cversion: 47
|
|
|
|
|
aversion: 0
|
|
|
|
|
ephemeralOwner: 0
|
|
|
|
|
dataLength: 0
|
|
|
|
|
numChildren: 7
|
|
|
|
|
pzxid: 987021031383
|
|
|
|
|
path: /clickhouse/tables/01-08/visits/replicas
|
|
|
|
|
|
|
|
|
|
Row 2:
|
|
|
|
|
──────
|
|
|
|
|
name: example01-08-2.yandex.ru
|
|
|
|
|
value:
|
|
|
|
|
czxid: 933002738135
|
|
|
|
|
mzxid: 933002738135
|
|
|
|
|
ctime: 2015-03-27 16:57:01
|
|
|
|
|
mtime: 2015-03-27 16:57:01
|
|
|
|
|
version: 0
|
|
|
|
|
cversion: 37
|
|
|
|
|
aversion: 0
|
|
|
|
|
ephemeralOwner: 0
|
|
|
|
|
dataLength: 0
|
|
|
|
|
numChildren: 7
|
|
|
|
|
pzxid: 987021252247
|
|
|
|
|
path: /clickhouse/tables/01-08/visits/replicas
|
|
|
|
|
```
|
2021-06-24 12:47:02 +00:00
|
|
|
|
[原文](https://clickhouse.tech/docs/zh/operations/system-tables/zookeeper) <!--hide-->
|