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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
1.7 KiB
1.7 KiB
machine_translated | machine_translated_rev | toc_priority | toc_title |
---|---|---|---|
true | 72537a2d52 |
46 | GenerateRandom |
Generaterandom
El motor de tabla GenerateRandom produce datos aleatorios para el esquema de tabla determinado.
Ejemplos de uso:
- Se usa en la prueba para poblar una tabla grande reproducible.
- Generar entrada aleatoria para pruebas de fuzzing.
Uso en el servidor ClickHouse
ENGINE = GenerateRandom(random_seed, max_string_length, max_array_length)
El max_array_length
y max_string_length
parámetros especifican la longitud máxima de todos
columnas y cadenas de matriz correspondientemente en los datos generados.
Generar motor de tabla sólo admite SELECT
consulta.
Es compatible con todos Tipos de datos que se pueden almacenar en una tabla excepto LowCardinality
y AggregateFunction
.
Ejemplo:
1. Configurar el generate_engine_table
tabla:
CREATE TABLE generate_engine_table (name String, value UInt32) ENGINE = GenerateRandom(1, 5, 3)
2. Consultar los datos:
SELECT * FROM generate_engine_table LIMIT 3
┌─name─┬──────value─┐
│ c4xJ │ 1412771199 │
│ r │ 1791099446 │
│ 7#$ │ 124312908 │
└──────┴────────────┘
Detalles de la implementación
- No soportado:
ALTER
SELECT ... SAMPLE
INSERT
- Indice
- Replicación