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/*
* Copyright (C) 2008-2013 TrinityCore <http://www.trinitycore.org/>
* Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
*
* 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/>.
*/
#include "DatabaseEnv.h"
#include "Log.h"
ResultSet::ResultSet(MYSQL_RES *result, MYSQL_FIELD *fields, uint64 rowCount, uint32 fieldCount) :
_rowCount(rowCount),
_fieldCount(fieldCount),
_result(result),
_fields(fields)
{
_currentRow = new Field[_fieldCount];
ASSERT(_currentRow);
}
PreparedResultSet::PreparedResultSet(MYSQL_STMT* stmt, MYSQL_RES *result, uint64 rowCount, uint32 fieldCount) :
m_rowCount(rowCount),
m_rowPosition(0),
m_fieldCount(fieldCount),
m_rBind(NULL),
m_stmt(stmt),
m_res(result),
m_isNull(NULL),
m_length(NULL)
{
if (!m_res)
return;
if (m_stmt->bind_result_done)
{
delete[] m_stmt->bind->length;
delete[] m_stmt->bind->is_null;
}
m_rBind = new MYSQL_BIND[m_fieldCount];
m_isNull = new my_bool[m_fieldCount];
m_length = new unsigned long[m_fieldCount];
memset(m_isNull, 0, sizeof(my_bool) * m_fieldCount);
memset(m_rBind, 0, sizeof(MYSQL_BIND) * m_fieldCount);
memset(m_length, 0, sizeof(unsigned long) * m_fieldCount);
//- This is where we store the (entire) resultset
if (mysql_stmt_store_result(m_stmt))
{
TC_LOG_WARN("sql.sql", "%s:mysql_stmt_store_result, cannot bind result from MySQL server. Error: %s", __FUNCTION__, mysql_stmt_error(m_stmt));
delete[] m_rBind;
delete[] m_isNull;
delete[] m_length;
return;
}
//- This is where we prepare the buffer based on metadata
uint32 i = 0;
MYSQL_FIELD* field = mysql_fetch_field(m_res);
while (field)
{
size_t size = Field::SizeForType(field);
m_rBind[i].buffer_type = field->type;
m_rBind[i].buffer = malloc(size);
memset(m_rBind[i].buffer, 0, size);
m_rBind[i].buffer_length = size;
m_rBind[i].length = &m_length[i];
m_rBind[i].is_null = &m_isNull[i];
m_rBind[i].error = NULL;
m_rBind[i].is_unsigned = field->flags & UNSIGNED_FLAG;
++i;
field = mysql_fetch_field(m_res);
}
//- This is where we bind the bind the buffer to the statement
if (mysql_stmt_bind_result(m_stmt, m_rBind))
{
TC_LOG_WARN("sql.sql", "%s:mysql_stmt_bind_result, cannot bind result from MySQL server. Error: %s", __FUNCTION__, mysql_stmt_error(m_stmt));
delete[] m_rBind;
delete[] m_isNull;
delete[] m_length;
return;
}
m_rowCount = mysql_stmt_num_rows(m_stmt);
m_rows.resize(uint32(m_rowCount));
while (_NextRow())
{
m_rows[uint32(m_rowPosition)] = new Field[m_fieldCount];
for (uint64 fIndex = 0; fIndex < m_fieldCount; ++fIndex)
{
if (!*m_rBind[fIndex].is_null)
m_rows[uint32(m_rowPosition)][fIndex].SetByteValue( m_rBind[fIndex].buffer,
m_rBind[fIndex].buffer_length,
m_rBind[fIndex].buffer_type,
*m_rBind[fIndex].length );
else
switch (m_rBind[fIndex].buffer_type)
{
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_BLOB:
case MYSQL_TYPE_STRING:
case MYSQL_TYPE_VAR_STRING:
m_rows[uint32(m_rowPosition)][fIndex].SetByteValue( "",
m_rBind[fIndex].buffer_length,
m_rBind[fIndex].buffer_type,
*m_rBind[fIndex].length );
break;
default:
m_rows[uint32(m_rowPosition)][fIndex].SetByteValue( 0,
m_rBind[fIndex].buffer_length,
m_rBind[fIndex].buffer_type,
*m_rBind[fIndex].length );
}
}
m_rowPosition++;
}
m_rowPosition = 0;
/// All data is buffered, let go of mysql c api structures
CleanUp();
}
ResultSet::~ResultSet()
{
CleanUp();
}
PreparedResultSet::~PreparedResultSet()
{
for (uint32 i = 0; i < uint32(m_rowCount); ++i)
delete[] m_rows[i];
}
bool ResultSet::NextRow()
{
MYSQL_ROW row;
if (!_result)
return false;
row = mysql_fetch_row(_result);
if (!row)
{
CleanUp();
return false;
}
for (uint32 i = 0; i < _fieldCount; i++)
_currentRow[i].SetStructuredValue(row[i], _fields[i].type);
return true;
}
bool PreparedResultSet::NextRow()
{
/// Only updates the m_rowPosition so upper level code knows in which element
/// of the rows vector to look
if (++m_rowPosition >= m_rowCount)
return false;
return true;
}
bool PreparedResultSet::_NextRow()
{
/// Only called in low-level code, namely the constructor
/// Will iterate over every row of data and buffer it
if (m_rowPosition >= m_rowCount)
return false;
int retval = mysql_stmt_fetch( m_stmt );
if (!retval || retval == MYSQL_DATA_TRUNCATED)
retval = true;
if (retval == MYSQL_NO_DATA)
retval = false;
return retval;
}
void ResultSet::CleanUp()
{
if (_currentRow)
{
delete [] _currentRow;
_currentRow = NULL;
}
if (_result)
{
mysql_free_result(_result);
_result = NULL;
}
}
void PreparedResultSet::CleanUp()
{
/// More of the in our code allocated sources are deallocated by the poorly documented mysql c api
if (m_res)
mysql_free_result(m_res);
FreeBindBuffer();
mysql_stmt_free_result(m_stmt);
delete[] m_rBind;
}
void PreparedResultSet::FreeBindBuffer()
{
for (uint32 i = 0; i < m_fieldCount; ++i)
free (m_rBind[i].buffer);
}
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