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Merge pull request #64534 from ClickHouse/evillique-patch-1

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Unify SYSTEM query docs
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Konstantin Bogdanov 2024-05-28 17:43:35 +00:00 committed by GitHub
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docs/en/sql-reference/statements/system.md
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@ -206,6 +206,32 @@ Enables background data distribution when inserting data into distributed tables
SYSTEM START DISTRIBUTED SENDS [db.]<distributed_table_name> [ON CLUSTER cluster_name] SYSTEM START DISTRIBUTED SENDS [db.]<distributed_table_name> [ON CLUSTER cluster_name]
``` ```
### STOP LISTEN
Closes the socket and gracefully terminates the existing connections to the server on the specified port with the specified protocol.
However, if the corresponding protocol settings were not specified in the clickhouse-server configuration, this command will have no effect.
```sql
SYSTEM STOP LISTEN [ON CLUSTER cluster_name] [QUERIES ALL | QUERIES DEFAULT | QUERIES CUSTOM | TCP | TCP WITH PROXY | TCP SECURE | HTTP | HTTPS | MYSQL | GRPC | POSTGRESQL | PROMETHEUS | CUSTOM 'protocol']
```
- If `CUSTOM 'protocol'` modifier is specified, the custom protocol with the specified name defined in the protocols section of the server configuration will be stopped.
- If `QUERIES ALL [EXCEPT .. [,..]]` modifier is specified, all protocols are stopped, unless specified with `EXCEPT` clause.
- If `QUERIES DEFAULT [EXCEPT .. [,..]]` modifier is specified, all default protocols are stopped, unless specified with `EXCEPT` clause.
- If `QUERIES CUSTOM [EXCEPT .. [,..]]` modifier is specified, all custom protocols are stopped, unless specified with `EXCEPT` clause.
### START LISTEN
Allows new connections to be established on the specified protocols.
However, if the server on the specified port and protocol was not stopped using the SYSTEM STOP LISTEN command, this command will have no effect.
```sql
SYSTEM START LISTEN [ON CLUSTER cluster_name] [QUERIES ALL | QUERIES DEFAULT | QUERIES CUSTOM | TCP | TCP WITH PROXY | TCP SECURE | HTTP | HTTPS | MYSQL | GRPC | POSTGRESQL | PROMETHEUS | CUSTOM 'protocol']
```
## Managing MergeTree Tables ## Managing MergeTree Tables
ClickHouse can manage background processes in [MergeTree](../../engines/table-engines/mergetree-family/mergetree.md) tables. ClickHouse can manage background processes in [MergeTree](../../engines/table-engines/mergetree-family/mergetree.md) tables.
@ -463,30 +489,16 @@ Will do sync syscall.
SYSTEM SYNC FILE CACHE [ON CLUSTER cluster_name] SYSTEM SYNC FILE CACHE [ON CLUSTER cluster_name]
``` ```
### UNLOAD PRIMARY KEY
## SYSTEM STOP LISTEN Unload the primary keys for the given table or for all tables.
Closes the socket and gracefully terminates the existing connections to the server on the specified port with the specified protocol.
However, if the corresponding protocol settings were not specified in the clickhouse-server configuration, this command will have no effect.
```sql ```sql
SYSTEM STOP LISTEN [ON CLUSTER cluster_name] [QUERIES ALL | QUERIES DEFAULT | QUERIES CUSTOM | TCP | TCP WITH PROXY | TCP SECURE | HTTP | HTTPS | MYSQL | GRPC | POSTGRESQL | PROMETHEUS | CUSTOM 'protocol'] SYSTEM UNLOAD PRIMARY KEY [db.]name
``` ```
- If `CUSTOM 'protocol'` modifier is specified, the custom protocol with the specified name defined in the protocols section of the server configuration will be stopped.
- If `QUERIES ALL [EXCEPT .. [,..]]` modifier is specified, all protocols are stopped, unless specified with `EXCEPT` clause.
- If `QUERIES DEFAULT [EXCEPT .. [,..]]` modifier is specified, all default protocols are stopped, unless specified with `EXCEPT` clause.
- If `QUERIES CUSTOM [EXCEPT .. [,..]]` modifier is specified, all custom protocols are stopped, unless specified with `EXCEPT` clause.
## SYSTEM START LISTEN
Allows new connections to be established on the specified protocols.
However, if the server on the specified port and protocol was not stopped using the SYSTEM STOP LISTEN command, this command will have no effect.
```sql ```sql
SYSTEM START LISTEN [ON CLUSTER cluster_name] [QUERIES ALL | QUERIES DEFAULT | QUERIES CUSTOM | TCP | TCP WITH PROXY | TCP SECURE | HTTP | HTTPS | MYSQL | GRPC | POSTGRESQL | PROMETHEUS | CUSTOM 'protocol'] SYSTEM UNLOAD PRIMARY KEY
``` ```
## Managing Refreshable Materialized Views {#refreshable-materialized-views} ## Managing Refreshable Materialized Views {#refreshable-materialized-views}
@ -495,7 +507,7 @@ Commands to control background tasks performed by [Refreshable Materialized View
Keep an eye on [`system.view_refreshes`](../../operations/system-tables/view_refreshes.md) while using them. Keep an eye on [`system.view_refreshes`](../../operations/system-tables/view_refreshes.md) while using them.
### SYSTEM REFRESH VIEW ### REFRESH VIEW
Trigger an immediate out-of-schedule refresh of a given view. Trigger an immediate out-of-schedule refresh of a given view.
@ -503,7 +515,7 @@ Trigger an immediate out-of-schedule refresh of a given view.
SYSTEM REFRESH VIEW [db.]name SYSTEM REFRESH VIEW [db.]name
``` ```
### SYSTEM STOP VIEW, SYSTEM STOP VIEWS ### STOP VIEW, STOP VIEWS
Disable periodic refreshing of the given view or all refreshable views. If a refresh is in progress, cancel it too. Disable periodic refreshing of the given view or all refreshable views. If a refresh is in progress, cancel it too.
@ -514,7 +526,7 @@ SYSTEM STOP VIEW [db.]name
SYSTEM STOP VIEWS SYSTEM STOP VIEWS
``` ```
### SYSTEM START VIEW, SYSTEM START VIEWS ### START VIEW, START VIEWS
Enable periodic refreshing for the given view or all refreshable views. No immediate refresh is triggered. Enable periodic refreshing for the given view or all refreshable views. No immediate refresh is triggered.
@ -525,22 +537,10 @@ SYSTEM START VIEW [db.]name
SYSTEM START VIEWS SYSTEM START VIEWS
``` ```
### SYSTEM CANCEL VIEW ### CANCEL VIEW
If there's a refresh in progress for the given view, interrupt and cancel it. Otherwise do nothing. If there's a refresh in progress for the given view, interrupt and cancel it. Otherwise do nothing.
```sql ```sql
SYSTEM CANCEL VIEW [db.]name SYSTEM CANCEL VIEW [db.]name
``` ```
### SYSTEM UNLOAD PRIMARY KEY
Unload the primary keys for the given table or for all tables.
```sql
SYSTEM UNLOAD PRIMARY KEY [db.]name
```
```sql
SYSTEM UNLOAD PRIMARY KEY
```