mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-24 18:50:49 +00:00
54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
#include "DictionarySourceHelpers.h"
|
|
#include <Columns/ColumnsNumber.h>
|
|
#include <Core/Block.h>
|
|
#include <Core/ColumnWithTypeAndName.h>
|
|
#include <DataStreams/IBlockOutputStream.h>
|
|
#include <DataTypes/DataTypesNumber.h>
|
|
#include <IO/WriteHelpers.h>
|
|
#include "DictionaryStructure.h"
|
|
|
|
|
|
namespace DB
|
|
{
|
|
/// For simple key
|
|
void formatIDs(BlockOutputStreamPtr & out, const std::vector<UInt64> & ids)
|
|
{
|
|
auto column = ColumnUInt64::create(ids.size());
|
|
memcpy(column->getData().data(), ids.data(), ids.size() * sizeof(ids.front()));
|
|
|
|
Block block{{std::move(column), std::make_shared<DataTypeUInt64>(), "id"}};
|
|
|
|
out->writePrefix();
|
|
out->write(block);
|
|
out->writeSuffix();
|
|
out->flush();
|
|
}
|
|
|
|
/// For composite key
|
|
void formatKeys(
|
|
const DictionaryStructure & dict_struct,
|
|
BlockOutputStreamPtr & out,
|
|
const Columns & key_columns,
|
|
const std::vector<size_t> & requested_rows)
|
|
{
|
|
Block block;
|
|
for (size_t i = 0, size = key_columns.size(); i < size; ++i)
|
|
{
|
|
const ColumnPtr & source_column = key_columns[i];
|
|
auto filtered_column = source_column->cloneEmpty();
|
|
filtered_column->reserve(requested_rows.size());
|
|
|
|
for (size_t idx : requested_rows)
|
|
filtered_column->insertFrom(*source_column, idx);
|
|
|
|
block.insert({std::move(filtered_column), (*dict_struct.key)[i].type, toString(i)});
|
|
}
|
|
|
|
out->writePrefix();
|
|
out->write(block);
|
|
out->writeSuffix();
|
|
out->flush();
|
|
}
|
|
|
|
}
|