Help wanted!
The following content of this documentation page has been machine-translated. But unlike other websites, it is not done on the fly. This translated text lives on GitHub repository alongside main ClickHouse codebase and waits for fellow native speakers to make it more human-readable. You can also use the original English version as a reference.
generateRandom
Genera datos aleatorios con un esquema dado.
Permite rellenar tablas de prueba con datos.
Admite todos los tipos de datos que se pueden almacenar en la tabla, excepto LowCardinality y AggregateFunction.
generateRandom('name TypeName[, name TypeName]...', [, 'random_seed'[, 'max_string_length'[, 'max_array_length']]]);
Parámetros
name— Name of corresponding column.TypeName— Type of corresponding column.max_array_length— Maximum array length for all generated arrays. Defaults to10.max_string_length— Maximum string length for all generated strings. Defaults to10.random_seed— Specify random seed manually to produce stable results. If NULL — seed is randomly generated.
Valor devuelto
Un objeto de tabla con el esquema solicitado.
Ejemplo de uso
SELECT * FROM generateRandom('a Array(Int8), d Decimal32(4), c Tuple(DateTime64(3), UUID)', 1, 10, 2) LIMIT 3;
┌─a────────┬────────────d─┬─c──────────────────────────────────────────────────────────────────┐
│ [77] │ -124167.6723 │ ('2061-04-17 21:59:44.573','3f72f405-ec3e-13c8-44ca-66ef335f7835') │
│ [32,110] │ -141397.7312 │ ('1979-02-09 03:43:48.526','982486d1-5a5d-a308-e525-7bd8b80ffa73') │
│ [68] │ -67417.0770 │ ('2080-03-12 14:17:31.269','110425e5-413f-10a6-05ba-fa6b3e929f15') │
└──────────┴──────────────┴────────────────────────────────────────────────────────────────────┘