ClickHouse/dbms/tests/external_dictionaries/dictionary_library/dictionary_library.cpp

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/// c++ sample dictionary library
#include <cstdint>
#include <iostream>
#include <memory>
#include <vector>
#include <Dictionaries/LibraryDictionarySourceExternal.h>
//#define DUMPS(VAR) #VAR " = " << VAR
//#define DUMP(VAR) std::cerr << __FILE__ << ":" << __LINE__ << " " << DUMPS(VAR) << "\n";
struct DataHolder
{
std::vector<std::vector<uint64_t>> vector;
std::unique_ptr<ClickHouseLibrary::VectorUInt64[]> columnsHolder;
ClickHouseLibrary::ColumnsUInt64 columns;
};
extern "C" {
void * ClickHouseDictionary_v1_loadIds(
void * data_ptr, ClickHouseLibrary::CStrings * settings, ClickHouseLibrary::CStrings * columns, const struct ClickHouseLibrary::VectorUInt64 * ids)
{
auto ptr = static_cast<DataHolder *>(data_ptr);
if (ids)
std::cerr << "loadIds lib call ptr=" << data_ptr << " => " << ptr << " size=" << ids->size << "\n";
if (settings)
{
std::cerr << "settings passed: " << settings->size << "\n";
for (size_t i = 0; i < settings->size; ++i)
std::cerr << "setting " << i << " :" << settings->data[i] << " \n";
}
if (columns)
{
std::cerr << "columns passed:" << columns->size << "\n";
for (size_t i = 0; i < columns->size; ++i)
std::cerr << "column " << i << " :" << columns->data[i] << "\n";
}
if (ptr)
{
if (ids)
{
std::cerr << "ids passed: " << ids->size << "\n";
for (size_t i = 0; i < ids->size; ++i)
{
std::cerr << "id " << i << " :" << ids->data[i] << " replying.\n";
ptr->vector.emplace_back(std::vector<uint64_t>{ids->data[i], ids->data[i] + 1, (1 + ids->data[i]) * 10, 65});
}
}
ptr->columnsHolder = std::make_unique<ClickHouseLibrary::VectorUInt64[]>(ptr->vector.size());
size_t i = 0;
for (auto & col : ptr->vector)
{
//DUMP(i);
//DUMP(col);
ptr->columnsHolder[i].size = col.size();
ptr->columnsHolder[i].data = col.data();
++i;
}
ptr->columns.size = ptr->vector.size();
//DUMP(ptr->columns.size);
ptr->columns.data = ptr->columnsHolder.get();
//DUMP(ptr->columns.columns);
return static_cast<void *>(&ptr->columns);
}
return nullptr;
}
2017-12-01 17:49:12 +00:00
void * ClickHouseDictionary_v1_loadAll(void * data_ptr, ClickHouseLibrary::CStrings * settings, ClickHouseLibrary::CStrings * /*columns*/)
{
auto ptr = static_cast<DataHolder *>(data_ptr);
std::cerr << "loadAll lib call ptr=" << data_ptr << " => " << ptr << "\n";
if (settings)
{
std::cerr << "settings passed: " << settings->size << "\n";
for (size_t i = 0; i < settings->size; ++i)
{
std::cerr << "setting " << i << " :" << settings->data[i] << " \n";
}
}
if (ptr)
{
for (size_t i = 0; i < 7; ++i)
{
std::cerr << "id " << i << " :"
<< " generating.\n";
ptr->vector.emplace_back(std::vector<uint64_t>{i, i + 1, (1 + i) * 10, 65});
}
ptr->columnsHolder = std::make_unique<ClickHouseLibrary::VectorUInt64[]>(ptr->vector.size());
size_t i = 0;
for (auto & col : ptr->vector)
{
ptr->columnsHolder[i].size = col.size();
ptr->columnsHolder[i].data = col.data();
++i;
}
ptr->columns.size = ptr->vector.size();
//DUMP(ptr->columns.size);
ptr->columns.data = ptr->columnsHolder.get();
//DUMP(ptr->columns.columns);
return static_cast<void *>(&ptr->columns);
}
//return;
return nullptr;
}
void * ClickHouseDictionary_v1_loadKeys(void * data_ptr,
ClickHouseLibrary::CStrings * settings,
ClickHouseLibrary::CStrings * columns,
const ClickHouseLibrary::VectorUInt64 * requested_rows)
{
auto ptr = static_cast<DataHolder *>(data_ptr);
std::cerr << "loadKeys lib call ptr=" << data_ptr << " => " << ptr << "\n";
if (settings)
{
std::cerr << "settings passed: " << settings->size << "\n";
for (size_t i = 0; i < settings->size; ++i)
{
std::cerr << "setting " << i << " :" << settings->data[i] << " \n";
}
}
if (columns)
{
std::cerr << "columns passed:" << columns->size << "\n";
for (size_t i = 0; i < columns->size; ++i)
{
std::cerr << "col " << i << " :" << columns->data[i] << "\n";
}
}
if (requested_rows)
{
std::cerr << "requested_rows passed: " << requested_rows->size << "\n";
for (size_t i = 0; i < requested_rows->size; ++i)
{
std::cerr << "id " << i << " :" << requested_rows->data[i] << "\n";
}
}
return nullptr;
}
void * ClickHouseDictionary_v1_dataAllocate()
{
auto data_ptr = new DataHolder;
return data_ptr;
}
void ClickHouseDictionary_v1_dataDelete(void * data_ptr)
{
auto ptr = static_cast<DataHolder *>(data_ptr);
delete ptr;
return;
}
}