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#include <AggregateFunctions/AggregateFunctionFactory.h>
#include <DataTypes/DataTypeMap.h>
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypesNumber.h>
#include <DataTypes/DataTypeEnum.h>
#include <Parsers/queryToString.h>
#include <Functions/FunctionFactory.h>
#include <Functions/IFunction.h>
#include <Interpreters/Context.h>
#include <Functions/UserDefined/UserDefinedSQLFunctionFactory.h>
#include <Functions/UserDefined/UserDefinedExecutableFunctionFactory.h>
#include <Storages/System/StorageSystemFunctions.h>
namespace DB
{
enum class FunctionOrigin : Int8
{
SYSTEM = 0,
SQL_USER_DEFINED = 1,
EXECUTABLE_USER_DEFINED = 2
};
namespace
{
template <typename Factory>
void fillRow(
MutableColumns & res_columns,
const String & name,
UInt64 is_aggregate,
const String & create_query,
FunctionOrigin function_origin,
const Factory & factory)
{
res_columns[0]->insert(name);
res_columns[1]->insert(is_aggregate);
if constexpr (std::is_same_v<Factory, UserDefinedSQLFunctionFactory> || std::is_same_v<Factory, UserDefinedExecutableFunctionFactory>)
{
res_columns[2]->insert(false);
res_columns[3]->insertDefault();
}
else
{
res_columns[2]->insert(factory.isCaseInsensitive(name));
if (factory.isAlias(name))
res_columns[3]->insert(factory.aliasTo(name));
else
res_columns[3]->insertDefault();
}
res_columns[4]->insert(create_query);
res_columns[5]->insert(static_cast<Int8>(function_origin));
if constexpr (std::is_same_v<Factory, FunctionFactory>)
{
if (factory.isAlias(name))
{
res_columns[6]->insertDefault();
res_columns[7]->insertDefault();
res_columns[8]->insertDefault();
res_columns[9]->insertDefault();
res_columns[10]->insertDefault();
res_columns[11]->insertDefault();
}
else
{
auto documentation = factory.getDocumentation(name);
res_columns[6]->insert(documentation.description);
res_columns[7]->insert(documentation.syntax);
res_columns[8]->insert(documentation.argumentsAsString());
res_columns[9]->insert(documentation.returned_value);
res_columns[10]->insert(documentation.examplesAsString());
res_columns[11]->insert(documentation.categoriesAsString());
}
}
else
{
res_columns[6]->insertDefault();
res_columns[7]->insertDefault();
res_columns[8]->insertDefault();
res_columns[9]->insertDefault();
res_columns[10]->insertDefault();
res_columns[11]->insertDefault();
}
}
}
std::vector<std::pair<String, Int8>> getOriginEnumsAndValues()
{
return std::vector<std::pair<String, Int8>>{
{"System", static_cast<Int8>(FunctionOrigin::SYSTEM)},
{"SQLUserDefined", static_cast<Int8>(FunctionOrigin::SQL_USER_DEFINED)},
{"ExecutableUserDefined", static_cast<Int8>(FunctionOrigin::EXECUTABLE_USER_DEFINED)}
};
}
NamesAndTypesList StorageSystemFunctions::getNamesAndTypes()
{
return {
{"name", std::make_shared<DataTypeString>()},
{"is_aggregate", std::make_shared<DataTypeUInt8>()},
{"case_insensitive", std::make_shared<DataTypeUInt8>()},
{"alias_to", std::make_shared<DataTypeString>()},
{"create_query", std::make_shared<DataTypeString>()},
{"origin", std::make_shared<DataTypeEnum8>(getOriginEnumsAndValues())},
{"description", std::make_shared<DataTypeString>()},
{"syntax", std::make_shared<DataTypeString>()},
{"arguments", std::make_shared<DataTypeString>()},
{"returned_value", std::make_shared<DataTypeString>()},
{"examples", std::make_shared<DataTypeString>()},
{"categories", std::make_shared<DataTypeString>()}
};
}
void StorageSystemFunctions::fillData(MutableColumns & res_columns, ContextPtr context, const SelectQueryInfo &) const
{
const auto & functions_factory = FunctionFactory::instance();
const auto & function_names = functions_factory.getAllRegisteredNames();
for (const auto & function_name : function_names)
{
fillRow(res_columns, function_name, UInt64(0), "", FunctionOrigin::SYSTEM, functions_factory);
}
const auto & aggregate_functions_factory = AggregateFunctionFactory::instance();
const auto & aggregate_function_names = aggregate_functions_factory.getAllRegisteredNames();
for (const auto & function_name : aggregate_function_names)
{
fillRow(res_columns, function_name, UInt64(1), "", FunctionOrigin::SYSTEM, aggregate_functions_factory);
}
const auto & user_defined_sql_functions_factory = UserDefinedSQLFunctionFactory::instance();
const auto & user_defined_sql_functions_names = user_defined_sql_functions_factory.getAllRegisteredNames();
for (const auto & function_name : user_defined_sql_functions_names)
{
auto create_query = queryToString(user_defined_sql_functions_factory.get(function_name));
fillRow(res_columns, function_name, UInt64(0), create_query, FunctionOrigin::SQL_USER_DEFINED, user_defined_sql_functions_factory);
}
const auto & user_defined_executable_functions_factory = UserDefinedExecutableFunctionFactory::instance();
const auto & user_defined_executable_functions_names = user_defined_executable_functions_factory.getRegisteredNames(context);
for (const auto & function_name : user_defined_executable_functions_names)
{
fillRow(res_columns, function_name, UInt64(0), "", FunctionOrigin::EXECUTABLE_USER_DEFINED, user_defined_executable_functions_factory);
}
}
void StorageSystemFunctions::backupData(BackupEntriesCollector & backup_entries_collector, const String & data_path_in_backup, const std::optional<ASTs> & /* partitions */)
{
UserDefinedSQLFunctionFactory::instance().backup(backup_entries_collector, data_path_in_backup);
}
void StorageSystemFunctions::restoreDataFromBackup(RestorerFromBackup & restorer, const String & data_path_in_backup, const std::optional<ASTs> & /* partitions */)
{
UserDefinedSQLFunctionFactory::instance().restore(restorer, data_path_in_backup);
}
}
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