mirror of
https://github.com/VCMP-SqMod/SqMod.git
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4a6bfc086c
Switched to POCO library for unified platform/library interface. Deprecated the external module API. It was creating more problems than solving. Removed most built-in libraries in favor of system libraries for easier maintenance. Cleaned and secured code with help from static analyzers.
150 lines
3.5 KiB
C++
150 lines
3.5 KiB
C++
//
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// StatementExecutor.cpp
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//
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// Library: Data/MySQL
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// Package: MySQL
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// Module: StatementExecutor
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//
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// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#include <mysql.h>
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#include "Poco/Data/MySQL/StatementExecutor.h"
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#include "Poco/Format.h"
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namespace Poco {
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namespace Data {
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namespace MySQL {
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StatementExecutor::StatementExecutor(MYSQL* mysql)
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: _pSessionHandle(mysql)
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, _affectedRowCount(0)
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{
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if (!(_pHandle = mysql_stmt_init(mysql)))
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throw StatementException("mysql_stmt_init error");
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_state = STMT_INITED;
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}
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StatementExecutor::~StatementExecutor()
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{
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mysql_stmt_close(_pHandle);
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}
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int StatementExecutor::state() const
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{
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return _state;
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}
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void StatementExecutor::prepare(const std::string& query)
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{
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if (_state >= STMT_COMPILED)
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{
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_state = STMT_COMPILED;
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return;
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}
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int rc = mysql_stmt_prepare(_pHandle, query.c_str(), static_cast<unsigned int>(query.length()));
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if (rc != 0)
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{
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// retry if connection lost
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int err = mysql_errno(_pSessionHandle);
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if (err == 2006 /* CR_SERVER_GONE_ERROR */ || err == 2013 /* CR_SERVER_LOST */)
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{
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rc = mysql_stmt_prepare(_pHandle, query.c_str(), static_cast<unsigned int>(query.length()));
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}
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}
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if (rc != 0) throw StatementException("mysql_stmt_prepare error", _pHandle, query);
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_query = query;
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_state = STMT_COMPILED;
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}
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void StatementExecutor::bindParams(MYSQL_BIND* params, std::size_t count)
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{
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if (_state < STMT_COMPILED)
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throw StatementException("Statement is not compiled yet");
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if (count != mysql_stmt_param_count(_pHandle))
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throw StatementException("wrong bind parameters count", 0, _query);
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if (count == 0) return;
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if (mysql_stmt_bind_param(_pHandle, params) != 0)
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throw StatementException("mysql_stmt_bind_param() error ", _pHandle, _query);
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}
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void StatementExecutor::bindResult(MYSQL_BIND* result)
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{
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if (_state < STMT_COMPILED)
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throw StatementException("Statement is not compiled yet");
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if (mysql_stmt_bind_result(_pHandle, result) != 0)
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throw StatementException("mysql_stmt_bind_result error ", _pHandle, _query);
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}
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void StatementExecutor::execute()
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{
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if (_state < STMT_COMPILED)
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throw StatementException("Statement is not compiled yet");
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if (mysql_stmt_execute(_pHandle) != 0)
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throw StatementException("mysql_stmt_execute error", _pHandle, _query);
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_state = STMT_EXECUTED;
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my_ulonglong affectedRows = mysql_affected_rows(_pSessionHandle);
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if (affectedRows != ((my_ulonglong) - 1))
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_affectedRowCount = static_cast<std::size_t>(affectedRows); //Was really a DELETE, UPDATE or INSERT statement
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}
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bool StatementExecutor::fetch()
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{
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if (_state < STMT_EXECUTED)
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throw StatementException("Statement is not executed yet");
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int res = mysql_stmt_fetch(_pHandle);
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// we have specified zero buffers for BLOBs, so DATA_TRUNCATED is normal in this case
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if ((res != 0) && (res != MYSQL_NO_DATA) && (res != MYSQL_DATA_TRUNCATED))
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throw StatementException("mysql_stmt_fetch error", _pHandle, _query);
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return (res == 0) || (res == MYSQL_DATA_TRUNCATED);
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}
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bool StatementExecutor::fetchColumn(std::size_t n, MYSQL_BIND *bind)
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{
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if (_state < STMT_EXECUTED)
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throw StatementException("Statement is not executed yet");
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int res = mysql_stmt_fetch_column(_pHandle, bind, static_cast<unsigned int>(n), 0);
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if ((res != 0) && (res != MYSQL_NO_DATA))
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throw StatementException(Poco::format("mysql_stmt_fetch_column(%z) error", n), _pHandle, _query);
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return (res == 0);
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}
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int StatementExecutor::getAffectedRowCount() const
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{
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return static_cast<int>(_affectedRowCount);
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}
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} } } // namespace Poco::Data::MySQL
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