mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-13 09:52:38 +00:00
2e1f6bc56d
* replace exit with assert in test_single_page * improve save_raw_single_page docs option * More grammar fixes * "Built from" link in new tab * fix mistype * Example of include in docs * add anchor to meeting form * Draft of translation helper * WIP on translation helper * Replace some fa docs content with machine translation * add normalize-en-markdown.sh * normalize some en markdown * normalize some en markdown * admonition support * normalize * normalize * normalize * support wide tables * normalize * normalize * normalize * normalize * normalize * normalize * normalize * normalize * normalize * normalize * normalize * normalize * normalize * lightly edited machine translation of introdpection.md * lightly edited machhine translation of lazy.md * WIP on translation utils * Normalize ru docs * Normalize other languages * some fixes * WIP on normalize/translate tools * add requirements.txt * [experimental] add es docs language as machine translated draft * remove duplicate script * Back to wider tab-stop (narrow renders not so well)
75 lines
3.1 KiB
Markdown
75 lines
3.1 KiB
Markdown
# clickhouse-local {#clickhouse-local}
|
||
|
||
The `clickhouse-local` program enables you to perform fast processing on local files, without having to deploy and configure the ClickHouse server.
|
||
|
||
Accepts data that represent tables and queries them using [ClickHouse SQL dialect](../../query_language/index.md).
|
||
|
||
`clickhouse-local` uses the same core as ClickHouse server, so it supports most of the features and the same set of formats and table engines.
|
||
|
||
By default `clickhouse-local` does not have access to data on the same host, but it supports loading server configuration using `--config-file` argument.
|
||
|
||
!!! warning "Warning"
|
||
It is not recommended to load production server configuration into `clickhouse-local` because data can be damaged in case of human error.
|
||
|
||
## Usage {#usage}
|
||
|
||
Basic usage:
|
||
|
||
``` bash
|
||
$ clickhouse-local --structure "table_structure" --input-format "format_of_incoming_data" -q "query"
|
||
```
|
||
|
||
Arguments:
|
||
|
||
- `-S`, `--structure` — table structure for input data.
|
||
- `-if`, `--input-format` — input format, `TSV` by default.
|
||
- `-f`, `--file` — path to data, `stdin` by default.
|
||
- `-q` `--query` — queries to execute with `;` as delimeter.
|
||
- `-N`, `--table` — table name where to put output data, `table` by default.
|
||
- `-of`, `--format`, `--output-format` — output format, `TSV` by default.
|
||
- `--stacktrace` — whether to dump debug output in case of exception.
|
||
- `--verbose` — more details on query execution.
|
||
- `-s` — disables `stderr` logging.
|
||
- `--config-file` — path to configuration file in same format as for ClickHouse server, by default the configuration empty.
|
||
- `--help` — arguments references for `clickhouse-local`.
|
||
|
||
Also there are arguments for each ClickHouse configuration variable which are more commonly used instead of `--config-file`.
|
||
|
||
## Examples {#examples}
|
||
|
||
``` bash
|
||
$ echo -e "1,2\n3,4" | clickhouse-local -S "a Int64, b Int64" -if "CSV" -q "SELECT * FROM table"
|
||
Read 2 rows, 32.00 B in 0.000 sec., 5182 rows/sec., 80.97 KiB/sec.
|
||
1 2
|
||
3 4
|
||
```
|
||
|
||
Previous example is the same as:
|
||
|
||
``` bash
|
||
$ echo -e "1,2\n3,4" | clickhouse-local -q "CREATE TABLE table (a Int64, b Int64) ENGINE = File(CSV, stdin); SELECT a, b FROM table; DROP TABLE table"
|
||
Read 2 rows, 32.00 B in 0.000 sec., 4987 rows/sec., 77.93 KiB/sec.
|
||
1 2
|
||
3 4
|
||
```
|
||
|
||
Now let’s output memory user for each Unix user:
|
||
|
||
``` bash
|
||
$ ps aux | tail -n +2 | awk '{ printf("%s\t%s\n", $1, $4) }' | clickhouse-local -S "user String, mem Float64" -q "SELECT user, round(sum(mem), 2) as memTotal FROM table GROUP BY user ORDER BY memTotal DESC FORMAT Pretty"
|
||
```
|
||
|
||
``` text
|
||
Read 186 rows, 4.15 KiB in 0.035 sec., 5302 rows/sec., 118.34 KiB/sec.
|
||
┏━━━━━━━━━━┳━━━━━━━━━━┓
|
||
┃ user ┃ memTotal ┃
|
||
┡━━━━━━━━━━╇━━━━━━━━━━┩
|
||
│ bayonet │ 113.5 │
|
||
├──────────┼──────────┤
|
||
│ root │ 8.8 │
|
||
├──────────┼──────────┤
|
||
...
|
||
```
|
||
|
||
[Original article](https://clickhouse.tech/docs/en/operations/utils/clickhouse-local/) <!--hide-->
|