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DataTypeFactory.cpp
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191 lines (159 loc) · 6.38 KB
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#include <DataTypes/DataTypeFactory.h>
#include <DataTypes/DataTypeCustom.h>
#include <Parsers/parseQuery.h>
#include <Parsers/ParserCreateQuery.h>
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTIdentifier.h>
#include <Parsers/ASTLiteral.h>
#include <Common/typeid_cast.h>
#include <Poco/String.h>
#include <Common/StringUtils/StringUtils.h>
#include <IO/WriteHelpers.h>
#include <Core/Defines.h>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
extern const int UNKNOWN_TYPE;
extern const int ILLEGAL_SYNTAX_FOR_DATA_TYPE;
extern const int UNEXPECTED_AST_STRUCTURE;
extern const int DATA_TYPE_CANNOT_HAVE_ARGUMENTS;
}
DataTypePtr DataTypeFactory::get(const String & full_name) const
{
ParserDataType parser;
ASTPtr ast = parseQuery(parser, full_name.data(), full_name.data() + full_name.size(), "data type", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH);
return get(ast);
}
DataTypePtr DataTypeFactory::get(const ASTPtr & ast) const
{
if (const auto * func = ast->as<ASTFunction>())
{
if (func->parameters)
throw Exception("Data type cannot have multiple parenthesized parameters.", ErrorCodes::ILLEGAL_SYNTAX_FOR_DATA_TYPE);
return get(func->name, func->arguments);
}
if (const auto * ident = ast->as<ASTIdentifier>())
{
return get(ident->name(), {});
}
if (const auto * lit = ast->as<ASTLiteral>())
{
if (lit->value.isNull())
return get("Null", {});
}
throw Exception("Unexpected AST element for data type.", ErrorCodes::UNEXPECTED_AST_STRUCTURE);
}
DataTypePtr DataTypeFactory::get(const String & family_name_param, const ASTPtr & parameters) const
{
String family_name = getAliasToOrName(family_name_param);
if (endsWith(family_name, "WithDictionary"))
{
ASTPtr low_cardinality_params = std::make_shared<ASTExpressionList>();
String param_name = family_name.substr(0, family_name.size() - strlen("WithDictionary"));
if (parameters)
{
auto func = std::make_shared<ASTFunction>();
func->name = param_name;
func->arguments = parameters;
low_cardinality_params->children.push_back(func);
}
else
low_cardinality_params->children.push_back(std::make_shared<ASTIdentifier>(param_name));
return get("LowCardinality", low_cardinality_params);
}
return findCreatorByName(family_name)(parameters);
}
void DataTypeFactory::registerDataType(const String & family_name, Value creator, CaseSensitiveness case_sensitiveness)
{
if (creator == nullptr)
throw Exception("DataTypeFactory: the data type family " + family_name + " has been provided "
" a null constructor", ErrorCodes::LOGICAL_ERROR);
String family_name_lowercase = Poco::toLower(family_name);
if (isAlias(family_name) || isAlias(family_name_lowercase))
throw Exception("DataTypeFactory: the data type family name '" + family_name + "' is already registered as alias",
ErrorCodes::LOGICAL_ERROR);
if (!data_types.emplace(family_name, creator).second)
throw Exception("DataTypeFactory: the data type family name '" + family_name + "' is not unique",
ErrorCodes::LOGICAL_ERROR);
if (case_sensitiveness == CaseInsensitive
&& !case_insensitive_data_types.emplace(family_name_lowercase, creator).second)
throw Exception("DataTypeFactory: the case insensitive data type family name '" + family_name + "' is not unique",
ErrorCodes::LOGICAL_ERROR);
}
void DataTypeFactory::registerSimpleDataType(const String & name, SimpleCreator creator, CaseSensitiveness case_sensitiveness)
{
if (creator == nullptr)
throw Exception("DataTypeFactory: the data type " + name + " has been provided "
" a null constructor", ErrorCodes::LOGICAL_ERROR);
registerDataType(name, [name, creator](const ASTPtr & ast)
{
if (ast)
throw Exception("Data type " + name + " cannot have arguments", ErrorCodes::DATA_TYPE_CANNOT_HAVE_ARGUMENTS);
return creator();
}, case_sensitiveness);
}
void DataTypeFactory::registerDataTypeCustom(const String & family_name, CreatorWithCustom creator, CaseSensitiveness case_sensitiveness)
{
registerDataType(family_name, [creator](const ASTPtr & ast)
{
auto res = creator(ast);
res.first->setCustomization(std::move(res.second));
return res.first;
}, case_sensitiveness);
}
void DataTypeFactory::registerSimpleDataTypeCustom(const String &name, SimpleCreatorWithCustom creator, CaseSensitiveness case_sensitiveness)
{
registerDataTypeCustom(name, [creator](const ASTPtr & /*ast*/)
{
return creator();
}, case_sensitiveness);
}
const DataTypeFactory::Value & DataTypeFactory::findCreatorByName(const String & family_name) const
{
{
DataTypesDictionary::const_iterator it = data_types.find(family_name);
if (data_types.end() != it)
return it->second;
}
String family_name_lowercase = Poco::toLower(family_name);
{
DataTypesDictionary::const_iterator it = case_insensitive_data_types.find(family_name_lowercase);
if (case_insensitive_data_types.end() != it)
return it->second;
}
auto hints = this->getHints(family_name);
if (!hints.empty())
throw Exception("Unknown data type family: " + family_name + ". Maybe you meant: " + toString(hints), ErrorCodes::UNKNOWN_TYPE);
else
throw Exception("Unknown data type family: " + family_name, ErrorCodes::UNKNOWN_TYPE);
}
DataTypeFactory::DataTypeFactory()
{
registerDataTypeNumbers(*this);
registerDataTypeDecimal(*this);
registerDataTypeDate(*this);
registerDataTypeDateTime(*this);
registerDataTypeString(*this);
registerDataTypeFixedString(*this);
registerDataTypeEnum(*this);
registerDataTypeArray(*this);
registerDataTypeTuple(*this);
registerDataTypeNullable(*this);
registerDataTypeNothing(*this);
registerDataTypeUUID(*this);
registerDataTypeAggregateFunction(*this);
registerDataTypeNested(*this);
registerDataTypeInterval(*this);
registerDataTypeLowCardinality(*this);
registerDataTypeDomainIPv4AndIPv6(*this);
registerDataTypeDomainSimpleAggregateFunction(*this);
registerDataTypeDomainGeo(*this);
}
DataTypeFactory & DataTypeFactory::instance()
{
static DataTypeFactory ret;
return ret;
}
}