generateRandom
Generates random data with given schema.
Allows to populate test tables with data.
Supports all data types that can be stored in table except LowCardinality
and AggregateFunction
.
generateRandom('name TypeName[, name TypeName]...', [, 'random_seed'[, 'max_string_length'[, 'max_array_length']]])
Arguments
name
ā Name of corresponding column.TypeName
ā Type of corresponding column.max_array_length
ā Maximum array length for all generated arrays. Defaults to10
.max_string_length
ā Maximum string length for all generated strings. Defaults to10
.random_seed
ā Specify random seed manually to produce stable results. If NULL ā seed is randomly generated.
Returned Value
A table object with requested schema.
Usage Exampleā
SELECT * FROM generateRandom('a Array(Int8), d Decimal32(4), c Tuple(DateTime64(3), UUID)', 1, 10, 2) LIMIT 3;
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ā [77] ā -124167.6723 ā ('2061-04-17 21:59:44.573','3f72f405-ec3e-13c8-44ca-66ef335f7835') ā
ā [32,110] ā -141397.7312 ā ('1979-02-09 03:43:48.526','982486d1-5a5d-a308-e525-7bd8b80ffa73') ā
ā [68] ā -67417.0770 ā ('2080-03-12 14:17:31.269','110425e5-413f-10a6-05ba-fa6b3e929f15') ā
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