//

// ResultMetadata.h

//

// $Id: //poco/1.4/Data/MySQL/include/Poco/Data/MySQL/ResultMetadata.h#1 $

//

// Library: Data

// Package: MySQL

// Module: ResultMetadata

//

// Definition of the ResultMetadata class.

//

// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.

// and Contributors.

//

// SPDX-License-Identifier: BSL-1.0

//

#ifndef Data_MySQL_ResultMetadata_INCLUDED

#define Data_MySQL_ResultMetadata_INCLUDED

#include <mysql.h>

#include <vector>

#include "Poco/Data/MetaColumn.h"

namespace Poco {

namespace Data {

namespace MySQL {

class ResultMetadata

/// MySQL result metadata

{

public:

void reset();

/// Resets the metadata.

void init(MYSQL_STMT* stmt);

/// Initializes the metadata.

std::size_t columnsReturned() const;

/// Returns the number of columns in resultset.

const MetaColumn& metaColumn(std::size_t pos) const;

/// Returns the reference to the specified metacolumn.

MYSQL_BIND* row();

/// Returns pointer to native row.

std::size_t length(std::size_t pos) const;

/// Returns the length.

const unsigned char* rawData(std::size_t pos) const;

/// Returns raw data.

bool isNull(std::size_t pos) const;

/// Returns true if value at pos is null.

private:

std::vector<MetaColumn> _columns;

std::vector<MYSQL_BIND> _row;

std::vector<char> _buffer;

std::vector<unsigned long> _lengths;

std::vector<my_bool> _isNull;

};

}}}

#endif //Data_MySQL_ResultMetadata_INCLUDED