mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-04 21:42:39 +00:00
8623cb232c
* CLICKHOUSE-4063: less manual html @ index.md * CLICKHOUSE-4063: recommend markdown="1" in README.md * CLICKHOUSE-4003: manually purge custom.css for now * CLICKHOUSE-4064: expand <details> before any print (including to pdf) * CLICKHOUSE-3927: rearrange interfaces/formats.md a bit * CLICKHOUSE-3306: add few http headers * Remove copy-paste introduced in #3392 * Hopefully better chinese fonts #3392 * get rid of tabs @ custom.css * Apply comments and patch from #3384 * Add jdbc.md to ToC and some translation, though it still looks badly incomplete * minor punctuation * Add some backlinks to official website from mirrors that just blindly take markdown sources * Do not make fonts extra light * find . -name '*.md' -type f | xargs -I{} perl -pi -e 's//g' {} * find . -name '*.md' -type f | xargs -I{} perl -pi -e 's/ sql/g' {} * Remove outdated stuff from roadmap.md * Not so light font on front page too * Refactor Chinese formats.md to match recent changes in other languages
118 lines
6.3 KiB
Markdown
118 lines
6.3 KiB
Markdown
# Command-line Client
|
||
|
||
To work from the command line, you can use `clickhouse-client`:
|
||
|
||
```bash
|
||
$ clickhouse-client
|
||
ClickHouse client version 0.0.26176.
|
||
Connecting to localhost:9000.
|
||
Connected to ClickHouse server version 0.0.26176.
|
||
|
||
:)
|
||
```
|
||
|
||
The client supports command-line options and configuration files. For more information, see "[Configuring](#interfaces_cli_configuration)".
|
||
|
||
## Usage
|
||
|
||
The client can be used in interactive and non-interactive (batch) mode.
|
||
To use batch mode, specify the 'query' parameter, or send data to 'stdin' (it verifies that 'stdin' is not a terminal), or both.
|
||
Similar to the HTTP interface, when using the 'query' parameter and sending data to 'stdin', the request is a concatenation of the 'query' parameter, a line feed, and the data in 'stdin'. This is convenient for large INSERT queries.
|
||
|
||
Example of using the client to insert data:
|
||
|
||
```bash
|
||
echo -ne "1, 'some text', '2016-08-14 00:00:00'\n2, 'some more text', '2016-08-14 00:00:01'" | clickhouse-client --database=test --query="INSERT INTO test FORMAT CSV";
|
||
|
||
cat <<_EOF | clickhouse-client --database=test --query="INSERT INTO test FORMAT CSV";
|
||
3, 'some text', '2016-08-14 00:00:00'
|
||
4, 'some more text', '2016-08-14 00:00:01'
|
||
_EOF
|
||
|
||
cat file.csv | clickhouse-client --database=test --query="INSERT INTO test FORMAT CSV";
|
||
```
|
||
|
||
In batch mode, the default data format is TabSeparated. You can set the format in the FORMAT clause of the query.
|
||
|
||
By default, you can only process a single query in batch mode. To make multiple queries from a "script," use the --multiquery parameter. This works for all queries except INSERT. Query results are output consecutively without additional separators.
|
||
Similarly, to process a large number of queries, you can run 'clickhouse-client' for each query. Note that it may take tens of milliseconds to launch the 'clickhouse-client' program.
|
||
|
||
In interactive mode, you get a command line where you can enter queries.
|
||
|
||
If 'multiline' is not specified (the default):To run the query, press Enter. The semicolon is not necessary at the end of the query. To enter a multiline query, enter a backslash `\` before the line feed. After you press Enter, you will be asked to enter the next line of the query.
|
||
|
||
If multiline is specified:To run a query, end it with a semicolon and press Enter. If the semicolon was omitted at the end of the entered line, you will be asked to enter the next line of the query.
|
||
|
||
Only a single query is run, so everything after the semicolon is ignored.
|
||
|
||
You can specify `\G` instead of or after the semicolon. This indicates Vertical format. In this format, each value is printed on a separate line, which is convenient for wide tables. This unusual feature was added for compatibility with the MySQL CLI.
|
||
|
||
The command line is based on 'readline' (and 'history' or 'libedit', or without a library, depending on the build). In other words, it uses the familiar keyboard shortcuts and keeps a history.
|
||
The history is written to `~/.clickhouse-client-history`.
|
||
|
||
By default, the format used is PrettyCompact. You can change the format in the FORMAT clause of the query, or by specifying `\G` at the end of the query, using the `--format` or `--vertical` argument in the command line, or using the client configuration file.
|
||
|
||
To exit the client, press Ctrl+D (or Ctrl+C), or enter one of the following instead of a query: "exit", "quit", "logout", "exit;", "quit;", "logout;", "q", "Q", ":q"
|
||
|
||
When processing a query, the client shows:
|
||
|
||
1. Progress, which is updated no more than 10 times per second (by default). For quick queries, the progress might not have time to be displayed.
|
||
2. The formatted query after parsing, for debugging.
|
||
3. The result in the specified format.
|
||
4. The number of lines in the result, the time passed, and the average speed of query processing.
|
||
|
||
You can cancel a long query by pressing Ctrl+C. However, you will still need to wait a little for the server to abort the request. It is not possible to cancel a query at certain stages. If you don't wait and press Ctrl+C a second time, the client will exit.
|
||
|
||
The command-line client allows passing external data (external temporary tables) for querying. For more information, see the section "External data for query processing".
|
||
|
||
<a name="interfaces_cli_configuration"></a>
|
||
|
||
## Configuring
|
||
|
||
You can pass parameters to `clickhouse-client` (all parameters have a default value) using:
|
||
|
||
- From the Command Line
|
||
|
||
Command-line options override the default values and settings in configuration files.
|
||
|
||
- Configuration files.
|
||
|
||
Settings in the configuration files override the default values.
|
||
|
||
### Command Line Options
|
||
|
||
- `--host, -h` -– The server name, 'localhost' by default. You can use either the name or the IPv4 or IPv6 address.
|
||
- `--port` – The port to connect to. Default value: 9000. Note that the HTTP interface and the native interface use different ports.
|
||
- `--user, -u` – The username. Default value: default.
|
||
- `--password` – The password. Default value: empty string.
|
||
- `--query, -q` – The query to process when using non-interactive mode.
|
||
- `--database, -d` – Select the current default database. Default value: the current database from the server settings ('default' by default).
|
||
- `--multiline, -m` – If specified, allow multiline queries (do not send the query on Enter).
|
||
- `--multiquery, -n` – If specified, allow processing multiple queries separated by commas. Only works in non-interactive mode.
|
||
- `--format, -f` – Use the specified default format to output the result.
|
||
- `--vertical, -E` – If specified, use the Vertical format by default to output the result. This is the same as '--format=Vertical'. In this format, each value is printed on a separate line, which is helpful when displaying wide tables.
|
||
- `--time, -t` – If specified, print the query execution time to 'stderr' in non-interactive mode.
|
||
- `--stacktrace` – If specified, also print the stack trace if an exception occurs.
|
||
- `-config-file` – The name of the configuration file.
|
||
|
||
### Configuration Files
|
||
|
||
`clickhouse-client` uses the first existing file of the following:
|
||
|
||
- Defined in the `-config-file` parameter.
|
||
- `./clickhouse-client.xml`
|
||
- `\~/.clickhouse-client/config.xml`
|
||
- `/etc/clickhouse-client/config.xml`
|
||
|
||
Example of a config file:
|
||
|
||
```xml
|
||
<config>
|
||
<user>username</user>
|
||
<password>password</password>
|
||
</config>
|
||
```
|
||
|
||
|
||
[Original article](https://clickhouse.yandex/docs/en/interfaces/cli/) <!--hide-->
|