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30 lines
2.1 KiB
Markdown
30 lines
2.1 KiB
Markdown
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---
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slug: /en/operations/system-tables/zookeeper_connection
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---
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#zookeeper_connection
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This table does not exist if ZooKeeper is not configured. The 'system.zookeeper_connection' table shows current connections to ZooKeeper (including auxiliary ZooKeepers). Each row shows information about one connection.
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Columns:
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- `name` ([String](../../sql-reference/data-types/string.md)) — ZooKeeper cluster's name.
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- `host` ([String](../../sql-reference/data-types/string.md)) — The hostname/IP of the ZooKeeper node that ClickHouse connected to.
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- `port` ([String](../../sql-reference/data-types/string.md)) — The port of the ZooKeeper node that ClickHouse connected to.
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- `index` ([UInt8](../../sql-reference/data-types/int-uint.md)) — The index of the ZooKeeper node that ClickHouse connected to. The index is from ZooKeeper config.
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- `connected_time` ([String](../../sql-reference/data-types/string.md)) — When the connection was established
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- `is_expired` ([UInt8](../../sql-reference/data-types/int-uint.md)) — Is the current connection expired.
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- `keeper_api_version` ([String](../../sql-reference/data-types/string.md)) — Keeper API version.
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- `client_id` ([UInt64](../../sql-reference/data-types/int-uint.md)) — Session id of the connection.
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Example:
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``` sql
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SELECT * FROM system.zookeeper_connection;
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```
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``` text
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┌─name──────────────┬─host─────────┬─port─┬─index─┬──────connected_time─┬─is_expired─┬─keeper_api_version─┬──────────client_id─┐
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│ default_zookeeper │ 127.0.0.1 │ 2181 │ 0 │ 2023-05-19 14:30:16 │ 0 │ 0 │ 216349144108826660 │
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└───────────────────┴──────────────┴──────┴───────┴─────────────────────┴────────────┴────────────────────┴────────────────────┘
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```
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