mysql_stmt_execute() fails with the "Wrong sequence" - c++

Question

ALL,
I'm getting the Commands were executed in an improper order. trying to execute following code:
std::wstring query6 = L"SELECT( IF( ( SELECT 1 FROM information_schema.statistics WHERE index_name=\'abcattbl_tnam_ownr\' AND table_name=\'abcattbl\' ) > 0, \"SELECT 0\", \"CREATE INDEX abcattbl_tnam_ownr ON abcattbl(abt_tnam ASC, abt_ownr ASC)\"));";
std::wstring query7 = L"SELECT( IF( ( SELECT 1 FROM information_schema.statistics WHERE index_name=\'abcatcol_tnam_ownr_cnam\' AND table_name=\'abcatcol\' ) > 0, \"SELECT 0\", \"CREATE INDEX abcatcol_tnam_ownr_cnam ON abcatcoll(abc_tnam ASC, abc_ownr ASC, abc_cnam ASC)\"));";
res_stmt = mysql_stmt_init( m_db );
if( !res_stmt )
{
std::wstring err = m_pimpl->m_myconv.from_bytes( mysql_stmt_error( res_stmt ) );
errorMsg.push_back( err );
}
else
{
if( mysql_stmt_prepare( res_stmt, m_pimpl->m_myconv.to_bytes( query.c_str() ).c_str(), query.length() ) )
{
std::wstring err = m_pimpl->m_myconv.from_bytes( mysql_stmt_error( res_stmt ) );
errorMsg.push_back( err );
}
else
{
bool index_exist = IsSystemIndexExists( res_stmt, L"abcattbl_tnam_ownr", L"abcattbl", errorMsg );
if( !index_exist )
{
res = mysql_query( m_db, m_pimpl->m_myconv.to_bytes( query6.c_str() ).c_str() );
}
}
bool index_exist = IsSystemIndexExists( res_stmt, L"abcatcol_tnam_ownr_cnam", L"abcatcol", errorMsg );
if( !index_exist )
{
res = mysql_query( m_db, m_pimpl->m_myconv.to_bytes( query7.c_str() ).c_str() );
if( mysql_stmt_close( res_stmt ) )
{
std::wstring err = m_pimpl->m_myconv.from_bytes( mysql_stmt_error( res_stmt ) );
errorMsg.push_back( err );
}
}
}
bool MySQLDatabase::IsSystemIndexExists(MYSQL_STMT *res, const std::wstring &indexName, const std::wstring &tableName, std::vector<std::wstring> &errorMsg)
{
bool exists = false;
char *str_data[2] = { NULL, NULL };
unsigned long *str_length[3];
MYSQL_BIND values[2];
memset( values, 0, sizeof( values ) );
str_data[0] = new char[tableName.length() + 1];
str_data[1] = new char[indexName.length() + 1];
memset( str_data[0], 0, tableName.length() + 1 );
memset( str_data[1], 0, indexName.length() + 1 );
str_length[0] = new unsigned long;
str_length[1] = new unsigned long;
values[0].buffer_type = MYSQL_TYPE_STRING;
values[1].buffer_type = MYSQL_TYPE_STRING;
values[0].buffer = str_data[0];
values[1].buffer = str_data[1];
values[0].buffer_length = tableName.length();
values[1].buffer_length = indexName.length();
values[0].is_null = 0;
values[1].is_null = 0;
values[0].length = str_length[0];
values[1].length = str_length[1];
strncpy( str_data[0], m_pimpl->m_myconv.to_bytes( tableName.c_str() ).c_str(), tableName.length() );
strncpy( str_data[1], m_pimpl->m_myconv.to_bytes( indexName.c_str() ).c_str(), indexName.length() );
*str_length[0] = tableName.length();
*str_length[1] = indexName.length();
if( mysql_stmt_bind_param( res, values ) )
{
std::wstring err = m_pimpl->m_myconv.from_bytes( mysql_stmt_error( res ) );
errorMsg.push_back( err );
}
else
{
if( mysql_stmt_execute( res ) )
{
std::wstring err = m_pimpl->m_myconv.from_bytes( mysql_stmt_error( res ) );
errorMsg.push_back( err );
}
else
{
if( mysql_stmt_fetch( res ) != MYSQL_NO_DATA )
exists = 1;
}
}
}
delete str_data[0];
str_data[0] = NULL;
delete str_data[1];
str_data[1] = NULL;
delete str_length[0];
str_length[0] = NULL;
delete str_length[1];
str_length[1] = NULL;
return exists;
}
The first time function is called everything is executed correctly. However the second time the call fails with the above mentioned error.
What am I missing? Is there maybe a parameters un-bind function that needs to be called?
I feel like I'm missing something really obvious.
TIA!
[EDIT]:
Calling mysql_stmt_reset()/mysql_stmt_free_result() after _fetch() doesn't change the result.
[/EDIT]