mirror of
https://github.com/ClickHouse/ClickHouse.git
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Add new function generateRandomStructure
This commit is contained in:
avogar
parent
dee3156e0c
commit
067bfb8844
@ -2609,3 +2609,73 @@ Result:
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│ 286 │
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└──────────────────────────┘
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```
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## generateRandomStructure
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Generates random table structure in a format `column1_name column1_type, column2_name column2_type, ...`.
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**Syntax**
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``` sql
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generateRandomStructure([number_of_columns, seed])
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```
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**Arguments**
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- `number_of_columns` — The desired number of columns in the result table structure. If set to 0, the number of columns will be random from 1 to 128. Default value - 0.
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- `seed` - Random seed to produce stable results. If seed is not specified, it is randomly generated.
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All arguments must be constant.
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**Returned value**
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- Randomly generated table structure.
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Type: [String](../../sql-reference/data-types/string.md).
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**Examples**
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Query:
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``` sql
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SELECT generateRandomStructure()
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```
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Result:
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``` text
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┌─generateRandomStructure()─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
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│ c1 Decimal32(5), c2 Date, c3 Tuple(LowCardinality(String), Int128, UInt64, UInt16, UInt8, IPv6), c4 Array(UInt128), c5 UInt32, c6 IPv4, c7 Decimal256(64), c8 Decimal128(3), c9 UInt256, c10 UInt64, c11 DateTime │
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└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
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```
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Query:
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``` sql
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SELECT generateRandomStructure(1)
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```
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Result:
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``` text
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┌─generateRandomStructure(1)─┐
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│ c1 Map(UInt256, UInt16) │
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└────────────────────────────┘
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```
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Query:
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``` sql
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SELECT generateRandomStructure(0, 11)
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```
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Result:
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``` text
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┌─generateRandomStructure(0, 11)──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
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│ c1 Date32, c2 String, c3 IPv6, c4 DateTime, c5 UInt16, c6 Tuple(e1 UInt32, e2 Date, e3 Date, e4 IPv6, e5 Nested(e1 DateTime, e2 FixedString(110), e3 Int256, e4 Array(Decimal64(4)), e5 Decimal128(18), e6 Enum16('v0' = 0, 'v1' = 1, 'v2' = 2, 'v3' = 3, 'v4' = 4)), e6 DateTime64(4)), c7 DateTime, c8 DateTime64(6), c9 Bool │
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└─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
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```
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This function can be used together with [generateRandom](../../sql-reference/table-functions/generate.md) to generate completely random tables.
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@ -53,5 +53,19 @@ SELECT * FROM random;
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└──────────────────────────────┴──────────────┴────────────────────────────────────────────────────────────────────┘
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```
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In combination with [generateRandomStructure](../../sql-reference/functions/other-functions.md#generateRandomStructure):
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```sql
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SELECT * FROM generateRandom(generateRandomStructure(3, 24), 24) LIMIT 3;
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```
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```text
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┌─────────────────────────c1─┬─────c2─┬───────────────────c3─┬───────────────────────────────────────c4─┐
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│ 2085-07-05 23:48:43.345759 │ -20656 │ 1632406185424686785 │ -210464718903845545171230673454802.15238 │
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│ 1971-07-17 16:32:36.390777 │ -27071 │ -1553021742787219162 │ 1095158319964381336405161704296125.08074 │
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│ 2024-02-19 13:14:32.902513 │ 24913 │ 7727442383333447640 │ 1090748832613398997057187200834127.07109 │
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└────────────────────────────┴────────┴──────────────────────┴──────────────────────────────────────────┘
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```
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## Related content
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- Blog: [Generating random data in ClickHouse](https://clickhouse.com/blog/generating-random-test-distribution-data-for-clickhouse)
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@ -71,7 +71,7 @@ std::string extractTableName(const std::string & nested_name)
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}
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Block flatten(const Block & block)
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static Block flattenImpl(const Block & block, bool flatten_named_tuple)
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{
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Block res;
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@ -114,7 +114,7 @@ Block flatten(const Block & block)
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else
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res.insert(elem);
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}
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else if (const DataTypeTuple * type_tuple = typeid_cast<const DataTypeTuple *>(elem.type.get()))
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else if (const DataTypeTuple * type_tuple = typeid_cast<const DataTypeTuple *>(elem.type.get()); type_tuple && flatten_named_tuple)
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{
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if (type_tuple->haveExplicitNames())
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{
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@ -143,6 +143,17 @@ Block flatten(const Block & block)
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return res;
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}
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Block flatten(const Block & block)
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{
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return flattenImpl(block, true);
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}
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Block flattenArrayOfTuples(const Block & block)
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{
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return flattenImpl(block, false);
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}
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namespace
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{
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@ -23,6 +23,9 @@ namespace Nested
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/// 2) For an Array with named Tuple element column, a Array(Tuple(x ..., y ..., ...)), replace it with multiple Array Columns, a.x ..., a.y ..., ...
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Block flatten(const Block & block);
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/// Same as flatten but only for Array with named Tuple element column.
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Block flattenArrayOfTuples(const Block & block);
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/// Collect Array columns in a form of `column_name.element_name` to single Array(Tuple(...)) column.
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NamesAndTypesList collect(const NamesAndTypesList & names_and_types);
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343
src/Functions/generateRandomStructure.cpp
Normal file
343
src/Functions/generateRandomStructure.cpp
Normal file
@ -0,0 +1,343 @@
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#include "config.h"
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#include <Columns/ColumnString.h>
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#include <DataTypes/DataTypeString.h>
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#include <DataTypes/DataTypeFixedString.h>
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#include <Functions/FunctionFactory.h>
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#include <Functions/FunctionHelpers.h>
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#include <Functions/IFunction.h>
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#include <Interpreters/Context.h>
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#include <Common/randomSeed.h>
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#include <pcg_random.hpp>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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extern const int ILLEGAL_TYPE_OF_ARGUMENT;
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extern const int ILLEGAL_COLUMN;
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extern const int BAD_ARGUMENTS;
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}
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class FunctionGenerateRandomStructure : public IFunction
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{
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private:
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enum class SimpleTypes
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{
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Int8,
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UInt8,
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Bool,
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Int16,
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UInt16,
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Int32,
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UInt32,
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Int64,
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UInt64,
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Int128,
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UInt128,
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Int256,
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UInt256,
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Float32,
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Float64,
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DateTime64,
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Decimal32,
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Decimal64,
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Decimal128,
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Decimal256,
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Date,
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Date32,
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DateTime,
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String,
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FixedString,
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Enum8,
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Enum16,
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IPv4,
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IPv6,
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};
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enum class ComplexTypes
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{
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Nullable,
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LowCardinality,
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Array,
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Tuple,
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Map,
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Nested,
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};
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enum class MapKeyTypes
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{
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Int8,
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UInt8,
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Bool,
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Int16,
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UInt16,
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Int32,
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UInt32,
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Int64,
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UInt64,
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Int128,
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UInt128,
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Int256,
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UInt256,
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Date,
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Date32,
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DateTime,
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String,
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FixedString,
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};
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static constexpr size_t MAX_NUMBER_OF_COLUMNS = 128;
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static constexpr size_t MAX_TUPLE_ELEMENTS = 16;
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static constexpr size_t MAX_DATETIME64_PRECISION = 9;
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static constexpr size_t MAX_DECIMAL32_PRECISION = 9;
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static constexpr size_t MAX_DECIMAL64_PRECISION = 18;
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static constexpr size_t MAX_DECIMAL128_PRECISION = 38;
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static constexpr size_t MAX_DECIMAL256_PRECISION = 76;
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static constexpr size_t MAX_DEPTH = 32;
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public:
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static constexpr auto name = "generateRandomStructure";
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static FunctionPtr create(ContextPtr /*context*/)
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{
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return std::make_shared<FunctionGenerateRandomStructure>();
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}
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String getName() const override { return name; }
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size_t getNumberOfArguments() const override { return 0; }
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bool isVariadic() const override { return true; }
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bool isDeterministic() const override { return false; }
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bool isDeterministicInScopeOfQuery() const override { return false; }
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
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ColumnNumbers getArgumentsThatAreAlwaysConstant() const override { return {0, 1}; }
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
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{
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if (arguments.size() > 2)
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throw Exception(
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ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH,
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"Number of arguments for function {} doesn't match: passed {}, should be 0, 1 or 2.",
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getName(), arguments.size());
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if (arguments.size() > 1 && !isUnsignedInteger(arguments[0]))
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{
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throw Exception(
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of the first argument of function {}, expected unsigned integer",
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arguments[0]->getName(),
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getName());
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}
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if (arguments.size() > 2 && !isUnsignedInteger(arguments[1]))
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{
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throw Exception(
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of the second argument of function {}, expected unsigned integer",
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arguments[1]->getName(),
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getName());
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}
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return std::make_shared<DataTypeString>();
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}
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bool useDefaultImplementationForConstants() const override { return false; }
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
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{
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size_t seed = randomSeed();
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size_t number_of_columns = 0;
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if (!arguments.empty())
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{
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const auto & first_arg = arguments[0];
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if (!isUnsignedInteger(first_arg.type))
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throw Exception(
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of the first argument of function {}, expected unsigned integer",
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first_arg.type->getName(),
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getName());
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number_of_columns = first_arg.column->getUInt(0);
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if (number_of_columns > MAX_NUMBER_OF_COLUMNS)
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "Maximum allowed number of columns is {}, got {}", MAX_NUMBER_OF_COLUMNS, number_of_columns);
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if (arguments.size() == 2)
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{
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const auto & second_arg = arguments[1];
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if (!isUnsignedInteger(second_arg.type))
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throw Exception(
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of the second argument of function {}, expected unsigned integer",
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second_arg.type->getName(),
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getName());
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seed = second_arg.column->getUInt(0);
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}
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}
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pcg64 rng(seed);
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if (number_of_columns == 0)
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number_of_columns = generateNumberOfColumns(rng);
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auto col_res = ColumnString::create();
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String generated_structure = "";
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for (size_t i = 0; i != number_of_columns; ++i)
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{
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if (i != 0)
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generated_structure += ", ";
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auto type = generateRandomType(rng);
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generated_structure += "c" + std::to_string(i + 1) + " " + type;
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}
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col_res->insert(generated_structure);
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return ColumnConst::create(std::move(col_res), input_rows_count);
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}
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private:
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size_t generateNumberOfColumns(pcg64 & rng) const
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{
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return rng() % MAX_NUMBER_OF_COLUMNS + 1;
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}
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String generateRandomType(pcg64 & rng, bool allow_complex_types = true, size_t depth = 0) const
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{
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constexpr size_t simple_types_size = magic_enum::enum_count<SimpleTypes>();
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constexpr size_t complex_types_size = magic_enum::enum_count<ComplexTypes>();
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size_t type_index;
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if (allow_complex_types)
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type_index = rng() % (simple_types_size + complex_types_size);
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else
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type_index = rng() % simple_types_size;
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if (type_index < simple_types_size)
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{
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auto type = magic_enum::enum_value<SimpleTypes>(type_index);
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switch (type)
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{
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case SimpleTypes::FixedString:
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return "FixedString(" + std::to_string(rng() % MAX_FIXEDSTRING_SIZE_WITHOUT_SUSPICIOUS + 1) + ")";
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case SimpleTypes::DateTime64:
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return "DateTime64(" + std::to_string(rng() % MAX_DATETIME64_PRECISION) + ")";
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case SimpleTypes::Decimal32:
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return "Decimal32(" + std::to_string(rng() % MAX_DECIMAL32_PRECISION) + ")";
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case SimpleTypes::Decimal64:
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return "Decimal64(" + std::to_string(rng() % MAX_DECIMAL64_PRECISION) + ")";
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case SimpleTypes::Decimal128:
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return "Decimal128(" + std::to_string(rng() % MAX_DECIMAL128_PRECISION) + ")";
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case SimpleTypes::Decimal256:
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return "Decimal256(" + std::to_string(rng() % MAX_DECIMAL256_PRECISION) + ")";
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case SimpleTypes::Enum8:
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return "Enum8(" + generateEnumValues(rng) + ")";
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case SimpleTypes::Enum16:
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return "Enum16(" + generateEnumValues(rng) + ")";
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default:
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return String(magic_enum::enum_name<SimpleTypes>(type));
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}
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}
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auto complex_type = magic_enum::enum_value<ComplexTypes>(type_index - simple_types_size);
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switch (complex_type)
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{
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case ComplexTypes::LowCardinality:
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return "LowCardinality(" + generateLowCardinalityNestedType(rng) + ")";
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case ComplexTypes::Nullable:
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return "Nullable(" + generateRandomType(rng, false, depth + 1) + ")";
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case ComplexTypes::Array:
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return "Array(" + generateRandomType(rng, true, depth + 1) + ")";
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case ComplexTypes::Map:
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return "Map(" + generateMapKeyType(rng) + ", " + generateRandomType(rng, true, depth + 1) + ")";
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case ComplexTypes::Tuple:
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{
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size_t elements = rng() % MAX_TUPLE_ELEMENTS + 1;
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bool named_tuple = rng() % 2;
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String tuple_type = "Tuple(";
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for (size_t i = 0; i != elements; ++i)
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{
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if (i != 0)
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tuple_type += ", ";
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if (named_tuple)
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tuple_type += "e" + std::to_string(i + 1) + " ";
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tuple_type += generateRandomType(rng, true, depth + 1);
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}
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return tuple_type + ")";
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}
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case ComplexTypes::Nested:
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{
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size_t elements = rng() % MAX_TUPLE_ELEMENTS + 1;
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String nested_type = "Nested(";
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for (size_t i = 0; i != elements; ++i)
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{
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if (i != 0)
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nested_type += ", ";
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nested_type += "e" + std::to_string(i + 1) + " " + generateRandomType(rng, true, depth + 1);
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}
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return nested_type + ")";
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}
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}
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}
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String generateMapKeyType(pcg64 & rng) const
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{
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constexpr size_t map_keys_types_size = magic_enum::enum_count<MapKeyTypes>();
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auto type = magic_enum::enum_value<MapKeyTypes>(rng() % map_keys_types_size);
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if (type == MapKeyTypes::FixedString)
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return "FixedString(" + std::to_string(rng() % MAX_FIXEDSTRING_SIZE_WITHOUT_SUSPICIOUS + 1) + ")";
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return String(magic_enum::enum_name<MapKeyTypes>(type));
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}
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String generateLowCardinalityNestedType(pcg64 & rng) const
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{
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/// Support only String and FixedString.
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String nested_type;
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if (rng() % 2)
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nested_type = "String";
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else
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nested_type = "FixedString(" + std::to_string(rng() % MAX_FIXEDSTRING_SIZE_WITHOUT_SUSPICIOUS + 1) + ")";
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return rng() % 2 ? nested_type : "Nullable(" + nested_type + ")";
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}
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String generateEnumValues(pcg64 & rng) const
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{
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/// Don't generate big enums, because it will lead to really big strings
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/// and slowness of this function, and it can lead to `Max query size exceeded`
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/// while using this function with generateRandom.
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ssize_t num_values = rng() % 16 + 1;
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String result;
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for (ssize_t i = 0; i != num_values; ++i)
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{
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if (i != 0)
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result += ", ";
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result += "'v" + std::to_string(i) + "' = " + std::to_string(i);
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}
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return result;
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}
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};
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||||
|
||||
REGISTER_FUNCTION(GenerateRandomStructure)
|
||||
{
|
||||
factory.registerFunction<FunctionGenerateRandomStructure>(
|
||||
{
|
||||
R"(
|
||||
Generates a random table structure.
|
||||
This function takes an optional constant argument, the number of column in the result structure.
|
||||
If argument is now specified, the number of columns is random. The maximum number of columns is 1024.
|
||||
The function returns a value of type String.
|
||||
)",
|
||||
Documentation::Examples{
|
||||
{"random", "SELECT generateRandomStructure()"},
|
||||
{"with specified number of arguments", "SELECT generateRandomStructure(10)"}},
|
||||
Documentation::Categories{"Random"}
|
||||
},
|
||||
FunctionFactory::CaseSensitive);
|
||||
}
|
||||
|
||||
}
|
||||
@ -422,7 +422,7 @@ class GenerateSource : public ISource
|
||||
{
|
||||
public:
|
||||
GenerateSource(UInt64 block_size_, UInt64 max_array_length_, UInt64 max_string_length_, UInt64 random_seed_, Block block_header_, ContextPtr context_)
|
||||
: ISource(Nested::flatten(prepareBlockToFill(block_header_)))
|
||||
: ISource(Nested::flattenArrayOfTuples(prepareBlockToFill(block_header_)))
|
||||
, block_size(block_size_), max_array_length(max_array_length_), max_string_length(max_string_length_)
|
||||
, block_to_fill(std::move(block_header_)), rng(random_seed_), context(context_) {}
|
||||
|
||||
@ -437,7 +437,7 @@ protected:
|
||||
for (const auto & elem : block_to_fill)
|
||||
columns.emplace_back(fillColumnWithRandomData(elem.type, block_size, max_array_length, max_string_length, rng, context));
|
||||
|
||||
columns = Nested::flatten(block_to_fill.cloneWithColumns(columns)).getColumns();
|
||||
columns = Nested::flattenArrayOfTuples(block_to_fill.cloneWithColumns(columns)).getColumns();
|
||||
return {std::move(columns), block_size};
|
||||
}
|
||||
|
||||
|
||||
@ -13,6 +13,7 @@
|
||||
#include <TableFunctions/TableFunctionFactory.h>
|
||||
#include <TableFunctions/TableFunctionGenerateRandom.h>
|
||||
#include <Interpreters/parseColumnsListForTableFunction.h>
|
||||
#include <Interpreters/evaluateConstantExpression.h>
|
||||
|
||||
#include "registerTableFunctions.h"
|
||||
|
||||
@ -28,7 +29,7 @@ namespace ErrorCodes
|
||||
extern const int CANNOT_EXTRACT_TABLE_STRUCTURE;
|
||||
}
|
||||
|
||||
void TableFunctionGenerateRandom::parseArguments(const ASTPtr & ast_function, ContextPtr /*context*/)
|
||||
void TableFunctionGenerateRandom::parseArguments(const ASTPtr & ast_function, ContextPtr context)
|
||||
{
|
||||
ASTs & args_func = ast_function->children;
|
||||
|
||||
@ -45,6 +46,9 @@ void TableFunctionGenerateRandom::parseArguments(const ASTPtr & ast_function, Co
|
||||
"Table function '{}' requires at most four arguments: "
|
||||
" structure, [random_seed, max_string_length, max_array_length].", getName());
|
||||
|
||||
/// Allow constant expression for structure argument, it can be generated using generateRandomStructure function.
|
||||
args[0] = evaluateConstantExpressionAsLiteral(args[0], context);
|
||||
|
||||
// All the arguments must be literals.
|
||||
for (const auto & arg : args)
|
||||
{
|
||||
|
||||
14
tests/queries/0_stateless/02584_compressor_codecs.reference
Normal file
14
tests/queries/0_stateless/02584_compressor_codecs.reference
Normal file
@ -0,0 +1,14 @@
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
34
tests/queries/0_stateless/02584_compressor_codecs.sh
Executable file
34
tests/queries/0_stateless/02584_compressor_codecs.sh
Executable file
@ -0,0 +1,34 @@
|
||||
#!/usr/bin/env bash
|
||||
|
||||
CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
|
||||
# shellcheck source=../shell_config.sh
|
||||
. "$CURDIR"/../shell_config.sh
|
||||
|
||||
echo "Hello, World!" > 02584_test_data
|
||||
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'Delta' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "BAD_ARGUMENTS";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'Delta(5)' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "ILLEGAL_CODEC_PARAMETER";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'Delta([1,2])' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "ILLEGAL_CODEC_PARAMETER";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'Delta(4)' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out';
|
||||
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'DoubleDelta' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "BAD_ARGUMENTS";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'DoubleDelta(5)' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "ILLEGAL_CODEC_PARAMETER";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'DoubleDelta([1,2])' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "ILLEGAL_CODEC_PARAMETER";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'DoubleDelta(4)' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out';
|
||||
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'Gorilla' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "BAD_ARGUMENTS";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'Gorilla(5)' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "ILLEGAL_CODEC_PARAMETER";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'Gorilla([1,2])' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "ILLEGAL_CODEC_PARAMETER";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'Gorilla(4)' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out';
|
||||
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'FPC' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "BAD_ARGUMENTS";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'FPC(5)' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "BAD_ARGUMENTS";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'FPC(5, 1)' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "ILLEGAL_CODEC_PARAMETER";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'FPC([1,2,3])' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "ILLEGAL_CODEC_PARAMETER";
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'FPC(5, 4)' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out';
|
||||
|
||||
|
||||
$CLICKHOUSE_COMPRESSOR --codec 'T64' --codec 'LZ4' --input '02584_test_data' --output '02584_test_out' 2>&1 | grep -c "ILLEGAL_SYNTAX_FOR_CODEC_TYPE";
|
||||
|
||||
rm 02584_test_data 02584_test_out
|
||||
|
||||
@ -0,0 +1,4 @@
|
||||
c1 Int256, c2 Bool, c3 Int16, c4 Map(Int64, Array(Bool)), c5 Enum16(\'v0\' = 0, \'v1\' = 1, \'v2\' = 2, \'v3\' = 3, \'v4\' = 4, \'v5\' = 5, \'v6\' = 6, \'v7\' = 7, \'v8\' = 8, \'v9\' = 9, \'v10\' = 10)
|
||||
String
|
||||
Const(String)
|
||||
2085-07-05 23:48:43.345759 10105 1535011673144902513
|
||||
@ -0,0 +1,10 @@
|
||||
select generateRandomStructure(5, 42);
|
||||
select toTypeName(generateRandomStructure(5, 42));
|
||||
select toColumnTypeName(generateRandomStructure(5, 42));
|
||||
SELECT * FROM generateRandom(generateRandomStructure(3, 24), 24) LIMIT 1;
|
||||
|
||||
select generateRandomStructure(5, 42, 42); -- {serverError NUMBER_OF_ARGUMENTS_DOESNT_MATCH}
|
||||
select generateRandomStructure('5'); -- {serverError ILLEGAL_TYPE_OF_ARGUMENT}
|
||||
select generateRandomStructure(5, '42'); -- {serverError ILLEGAL_TYPE_OF_ARGUMENT}
|
||||
select generateRandomStructure(materialize(5), 42); -- {serverError ILLEGAL_COLUMN}
|
||||
select generateRandomStructure(5, materialize(42)); -- {serverError ILLEGAL_COLUMN}
|
||||
Loading…
Reference in New Issue
Block a user