mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-16 11:22:12 +00:00
cd14f9ebcb
* split up select.md * array-join.md basic refactoring * distinct.md basic refactoring * format.md basic refactoring * from.md basic refactoring * group-by.md basic refactoring * having.md basic refactoring * additional index.md refactoring * into-outfile.md basic refactoring * join.md basic refactoring * limit.md basic refactoring * limit-by.md basic refactoring * order-by.md basic refactoring * prewhere.md basic refactoring * adjust operators/index.md links * adjust sample.md links * adjust more links * adjust operatots links * fix some links * adjust aggregate function article titles * basic refactor of remaining select clauses * absolute paths in make_links.sh * run make_links.sh * remove old select.md locations * translate docs/es * translate docs/fr * translate docs/fa * remove old operators.md location * change operators.md links * adjust links in docs/es * adjust links in docs/es * minor texts adjustments * wip * update machine translations to use new links * fix changelog * es build fixes * get rid of some select.md links * temporary adjust ru links * temporary adjust more ru links * improve curly brace handling * adjust ru as well * fa build fix * ru link fixes * zh link fixes * temporary disable part of anchor checks
123 lines
3.5 KiB
Markdown
123 lines
3.5 KiB
Markdown
---
|
|
machine_translated: true
|
|
machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
|
|
toc_priority: 53
|
|
toc_title: Travailler avec UUID
|
|
---
|
|
|
|
# Fonctions pour travailler avec UUID {#functions-for-working-with-uuid}
|
|
|
|
Les fonctions pour travailler avec UUID sont listées ci-dessous.
|
|
|
|
## generateUUIDv4 {#uuid-function-generate}
|
|
|
|
Génère le [UUID](../../sql-reference/data-types/uuid.md) de [la version 4](https://tools.ietf.org/html/rfc4122#section-4.4).
|
|
|
|
``` sql
|
|
generateUUIDv4()
|
|
```
|
|
|
|
**Valeur renvoyée**
|
|
|
|
La valeur de type UUID.
|
|
|
|
**Exemple d'utilisation**
|
|
|
|
Cet exemple montre la création d'une table avec la colonne de type UUID et l'insertion d'une valeur dans la table.
|
|
|
|
``` sql
|
|
CREATE TABLE t_uuid (x UUID) ENGINE=TinyLog
|
|
|
|
INSERT INTO t_uuid SELECT generateUUIDv4()
|
|
|
|
SELECT * FROM t_uuid
|
|
```
|
|
|
|
``` text
|
|
┌────────────────────────────────────x─┐
|
|
│ f4bf890f-f9dc-4332-ad5c-0c18e73f28e9 │
|
|
└──────────────────────────────────────┘
|
|
```
|
|
|
|
## toUUID (x) {#touuid-x}
|
|
|
|
Convertit la valeur de type de chaîne en type UUID.
|
|
|
|
``` sql
|
|
toUUID(String)
|
|
```
|
|
|
|
**Valeur renvoyée**
|
|
|
|
La valeur de type UUID.
|
|
|
|
**Exemple d'utilisation**
|
|
|
|
``` sql
|
|
SELECT toUUID('61f0c404-5cb3-11e7-907b-a6006ad3dba0') AS uuid
|
|
```
|
|
|
|
``` text
|
|
┌─────────────────────────────────uuid─┐
|
|
│ 61f0c404-5cb3-11e7-907b-a6006ad3dba0 │
|
|
└──────────────────────────────────────┘
|
|
```
|
|
|
|
## UUIDStringToNum {#uuidstringtonum}
|
|
|
|
Accepte une chaîne contenant 36 caractères dans le format `xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx`, et le renvoie comme un ensemble d'octets dans un [FixedString (16)](../../sql-reference/data-types/fixedstring.md).
|
|
|
|
``` sql
|
|
UUIDStringToNum(String)
|
|
```
|
|
|
|
**Valeur renvoyée**
|
|
|
|
FixedString (16)
|
|
|
|
**Exemples d'utilisation**
|
|
|
|
``` sql
|
|
SELECT
|
|
'612f3c40-5d3b-217e-707b-6a546a3d7b29' AS uuid,
|
|
UUIDStringToNum(uuid) AS bytes
|
|
```
|
|
|
|
``` text
|
|
┌─uuid─────────────────────────────────┬─bytes────────────┐
|
|
│ 612f3c40-5d3b-217e-707b-6a546a3d7b29 │ a/<@];!~p{jTj={) │
|
|
└──────────────────────────────────────┴──────────────────┘
|
|
```
|
|
|
|
## UUIDNumToString {#uuidnumtostring}
|
|
|
|
Accepte un [FixedString (16)](../../sql-reference/data-types/fixedstring.md) valeur, et renvoie une chaîne contenant 36 caractères au format texte.
|
|
|
|
``` sql
|
|
UUIDNumToString(FixedString(16))
|
|
```
|
|
|
|
**Valeur renvoyée**
|
|
|
|
Chaîne.
|
|
|
|
**Exemple d'utilisation**
|
|
|
|
``` sql
|
|
SELECT
|
|
'a/<@];!~p{jTj={)' AS bytes,
|
|
UUIDNumToString(toFixedString(bytes, 16)) AS uuid
|
|
```
|
|
|
|
``` text
|
|
┌─bytes────────────┬─uuid─────────────────────────────────┐
|
|
│ a/<@];!~p{jTj={) │ 612f3c40-5d3b-217e-707b-6a546a3d7b29 │
|
|
└──────────────────┴──────────────────────────────────────┘
|
|
```
|
|
|
|
## Voir Aussi {#see-also}
|
|
|
|
- [dictGetUUID](ext-dict-functions.md#ext_dict_functions-other)
|
|
|
|
[Article Original](https://clickhouse.tech/docs/en/query_language/functions/uuid_function/) <!--hide-->
|