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Support Nested types in "generateRandom"

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This commit is contained in:
Alexey Milovidov 2020-04-13 02:08:32 +03:00
parent a517111259
commit 8ad89a82d4
3 changed files with 32 additions and 6 deletions
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28
src/Storages/StorageGenerateRandom.cpp
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@ -14,6 +14,7 @@
#include <DataTypes/DataTypeArray.h>
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypeFixedString.h>
#include <DataTypes/NestedUtils.h>
#include <Columns/ColumnArray.h>
#include <Columns/ColumnFixedString.h>
#include <Columns/ColumnString.h>
@ -57,7 +58,12 @@ void fillBufferWithRandomData(char * __restrict data, size_t size, pcg64 & rng)
ColumnPtr fillColumnWithRandomData(
const DataTypePtr type, UInt64 limit, UInt64 max_array_length, UInt64 max_string_length, pcg64 & rng, const Context & context)
const DataTypePtr type,
UInt64 limit,
UInt64 max_array_length,
UInt64 max_string_length,
pcg64 & rng,
const Context & context)
{
TypeIndex idx = type->getTypeId();
@ -340,14 +346,24 @@ public:
protected:
Chunk generate() override
{
/// To support Nested types, we will collect them to single Array of Tuple.
auto names_and_types = Nested::collect(block_header.getNamesAndTypesList());
Columns columns;
columns.reserve(block_header.columns());
DataTypes types = block_header.getDataTypes();
columns.reserve(names_and_types.size());
for (const auto & type : types)
columns.emplace_back(fillColumnWithRandomData(type, block_size, max_array_length, max_string_length, rng, context));
Block compact_block;
for (const auto & elem : names_and_types)
{
compact_block.insert(
{
fillColumnWithRandomData(elem.type, block_size, max_array_length, max_string_length, rng, context),
elem.type,
elem.name
});
}
return {std::move(columns), block_size};
return {Nested::flatten(compact_block).getColumns(), block_size};
}
private:

2
tests/queries/0_stateless/01128_generate_random_nested.reference Normal file
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@ -0,0 +1,2 @@
100 12366141706519416319
109 2990700419202507835

8
tests/queries/0_stateless/01128_generate_random_nested.sql Normal file
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@ -0,0 +1,8 @@
DROP TABLE IF EXISTS mass_table_312;
CREATE TABLE mass_table_312 (d Date DEFAULT '2000-01-01', x UInt64, n Nested(a String, b String)) ENGINE = MergeTree(d, x, 1);
INSERT INTO mass_table_312 SELECT * FROM generateRandom('`d` Date,`x` UInt64,`n.a` Array(String),`n.b` Array(String)', 1, 10, 2) LIMIT 100;
SELECT count(), sum(cityHash64(*)) FROM mass_table_312;
SELECT count(), sum(cityHash64(*)) FROM mass_table_312 ARRAY JOIN n;
DROP TABLE mass_table_312;