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/*
* This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _FIELD_H
#define _FIELD_H
#include "Define.h"
#include "DatabaseEnvFwd.h"
#include <array>
#include <string>
#include <string_view>
#include <vector>
enum class DatabaseFieldTypes : uint8
{
Null,
Int8,
Int16,
Int32,
Int64,
Float,
Double,
Decimal,
Date,
Binary
};
struct QueryResultFieldMetadata
{
char const* TableName = nullptr;
char const* TableAlias = nullptr;
char const* Name = nullptr;
char const* Alias = nullptr;
char const* TypeName = nullptr;
uint32 Index = 0;
DatabaseFieldTypes Type = DatabaseFieldTypes::Null;
};
/**
@class Field
@brief Class used to access individual fields of database query result
Guideline on field type matching:
| MySQL type | method to use |
|------------------------|----------------------------------------|
| TINYINT | GetBool, GetInt8, GetUInt8 |
| SMALLINT | GetInt16, GetUInt16 |
| MEDIUMINT, INT | GetInt32, GetUInt32 |
| BIGINT | GetInt64, GetUInt64 |
| FLOAT | GetFloat |
| DOUBLE, DECIMAL | GetDouble |
| CHAR, VARCHAR, | GetCString, GetString |
| TINYTEXT, MEDIUMTEXT, | GetCString, GetString |
| TEXT, LONGTEXT | GetCString, GetString |
| TINYBLOB, MEDIUMBLOB, | GetBinary, GetString |
| BLOB, LONGBLOB | GetBinary, GetString |
| BINARY, VARBINARY | GetBinary |
Return types of aggregate functions:
| Function | Type |
|----------|-------------------|
| MIN, MAX | Same as the field |
| SUM, AVG | DECIMAL |
| COUNT | BIGINT |
*/
class TC_DATABASE_API Field
{
friend class ResultSet;
friend class PreparedResultSet;
public:
Field();
~Field();
bool GetBool() const // Wrapper, actually gets integer
{
return GetUInt8() == 1 ? true : false;
}
uint8 GetUInt8() const;
int8 GetInt8() const;
uint16 GetUInt16() const;
int16 GetInt16() const;
uint32 GetUInt32() const;
int32 GetInt32() const;
uint64 GetUInt64() const;
int64 GetInt64() const;
float GetFloat() const;
double GetDouble() const;
char const* GetCString() const;
std::string GetString() const;
std::string_view GetStringView() const;
std::vector<uint8> GetBinary() const;
template <size_t S>
std::array<uint8, S> GetBinary() const
{
std::array<uint8, S> buf;
GetBinarySizeChecked(buf.data(), S);
return buf;
}
bool IsNull() const
{
return data.value == nullptr;
}
protected:
struct
{
char const* value; // Actual data in memory
uint32 length; // Length
bool raw; // Raw bytes? (Prepared statement or ad hoc)
} data;
void SetByteValue(char const* newValue, uint32 length);
void SetStructuredValue(char const* newValue, uint32 length);
bool IsType(DatabaseFieldTypes type) const;
bool IsNumeric() const;
private:
QueryResultFieldMetadata const* meta;
void LogWrongType(char const* getter) const;
void SetMetadata(QueryResultFieldMetadata const* fieldMeta);
void GetBinarySizeChecked(uint8* buf, size_t size) const;
};
#endif
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