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https://github.com/ClickHouse/ClickHouse.git
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113 lines
4.4 KiB
C++
113 lines
4.4 KiB
C++
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#include <Core/Defines.h>
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#include <Columns/ColumnString.h>
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#include <Columns/ColumnConst.h>
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#include <Common/typeid_cast.h>
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#include <Common/assert_cast.h>
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#include <Core/Field.h>
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#include <Formats/FormatSettings.h>
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#include <DataTypes/DataTypeString.h>
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#include <DataTypes/DataTypeFactory.h>
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#include <DataTypes/Serializations/SerializationString.h>
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#include <Parsers/IAST.h>
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#include <Parsers/ASTLiteral.h>
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#include <IO/ReadHelpers.h>
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#include <IO/WriteHelpers.h>
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#include <IO/VarInt.h>
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#ifdef __SSE2__
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#include <emmintrin.h>
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#endif
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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extern const int UNEXPECTED_AST_STRUCTURE;
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}
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Field DataTypeString::getDefault() const
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{
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return String();
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}
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MutableColumnPtr DataTypeString::createColumn() const
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{
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return ColumnString::create();
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}
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bool DataTypeString::equals(const IDataType & rhs) const
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{
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return typeid(rhs) == typeid(*this);
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}
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SerializationPtr DataTypeString::doGetDefaultSerialization() const
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{
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return std::make_shared<SerializationString>();
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}
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static DataTypePtr create(const ASTPtr & arguments)
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{
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if (arguments && !arguments->children.empty())
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{
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if (arguments->children.size() > 1)
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throw Exception("String data type family mustn't have more than one argument - size in characters", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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const auto * argument = arguments->children[0]->as<ASTLiteral>();
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if (!argument || argument->value.getType() != Field::Types::UInt64)
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throw Exception("String data type family may have only a number (positive integer) as its argument", ErrorCodes::UNEXPECTED_AST_STRUCTURE);
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}
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return std::make_shared<DataTypeString>();
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}
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void registerDataTypeString(DataTypeFactory & factory)
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{
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factory.registerDataType("String", create);
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/// These synonims are added for compatibility.
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factory.registerAlias("CHAR", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("NCHAR", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("CHARACTER", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("VARCHAR", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("NVARCHAR", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("VARCHAR2", "String", DataTypeFactory::CaseInsensitive); /// Oracle
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factory.registerAlias("TEXT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("TINYTEXT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("MEDIUMTEXT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("LONGTEXT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("BLOB", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("CLOB", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("TINYBLOB", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("MEDIUMBLOB", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("LONGBLOB", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("BYTEA", "String", DataTypeFactory::CaseInsensitive); /// PostgreSQL
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factory.registerAlias("CHARACTER LARGE OBJECT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("CHARACTER VARYING", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("CHAR LARGE OBJECT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("CHAR VARYING", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("NATIONAL CHAR", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("NATIONAL CHARACTER", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("NATIONAL CHARACTER LARGE OBJECT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("NATIONAL CHARACTER VARYING", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("NATIONAL CHAR VARYING", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("NCHAR VARYING", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("NCHAR LARGE OBJECT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("BINARY LARGE OBJECT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("BINARY VARYING", "String", DataTypeFactory::CaseInsensitive);
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}
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}
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