DOCAPI-6550: Some clarifications.

This commit is contained in:
BayoNet 2019-05-07 17:56:46 +03:00
parent 78672f43e1
commit 95626b068d
2 changed files with 13 additions and 3 deletions

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@ -135,7 +135,7 @@ If you specified `decompress=1` in the URL, the server decompresses the same dat
It is also possible to use other compression methods for HTTP data. To send a `POST` request compressed, append the request header `Content-Encoding: compression_method`. In order for ClickHouse to compress the response, you must append `Accept-Encoding: compression_method`. You can use the following compression methods: It is also possible to use other compression methods for HTTP data. To send a `POST` request compressed, append the request header `Content-Encoding: compression_method`. In order for ClickHouse to compress the response, you must append `Accept-Encoding: compression_method`. You can use the following compression methods:
- Standard `gzip`-based [HTTP compression](https://en.wikipedia.org/wiki/HTTP_compression) (`compression_method = gzip`). - Common gzip-based [HTTP compression](https://en.wikipedia.org/wiki/HTTP_compression) (`compression_method = gzip`).
You should use the ClickHouse [enable_http_compression](../operations/settings/settings.md#settings-enable_http_compression) setting. You can configure the compression level of the data with the [http_zlib_compression_level](#settings-http_zlib_compression_level) setting. You should use the ClickHouse [enable_http_compression](../operations/settings/settings.md#settings-enable_http_compression) setting. You can configure the compression level of the data with the [http_zlib_compression_level](#settings-http_zlib_compression_level) setting.

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@ -6,12 +6,14 @@ Returns a string with the name of the host that this function was performed on.
## basename ## basename
Extracts trailing part of a string after the last slash or backslash. Extracts trailing part of a string after the last slash or backslash. This function if often used to extract the filename from the path.
``` ```
basename( expr ) basename( expr )
``` ```
Backslashes should be escaped in `expr`.
**Parameters** **Parameters**
`expr` — Expression, resulting in the [String](../../data_types/string.md)-type value. `expr` — Expression, resulting in the [String](../../data_types/string.md)-type value.
@ -21,7 +23,7 @@ basename( expr )
A string-type value that contains: A string-type value that contains:
- Trailing part of a string after the last slash or backslash in it. - Trailing part of a string after the last slash or backslash in it.
- Original string if there is no slashes or backslashes in it. - Original string if there are no slashes or backslashes in it.
**Example** **Example**
@ -34,6 +36,14 @@ SELECT basename(a), 'some/long/path/to/file' AS a
└────────────────────────────────────┴────────────────────────┘ └────────────────────────────────────┴────────────────────────┘
``` ```
```sql ```sql
SELECT basename(a), 'some\\long\\path\\to\\file' AS a
```
```text
┌─basename('some\\long\\path\\to\\file')─┬─a──────────────────────┐
│ file │ some\long\path\to\file │
└────────────────────────────────────────┴────────────────────────┘
```
```sql
SELECT basename(a), 'some-file-name' AS a SELECT basename(a), 'some-file-name' AS a
``` ```
```text ```text