=MySQL connector

Data/MySQL/src/StatementExecutor.cpp

@@ -0,0 +1,197 @@
+//
+// StatementExecutor.cpp
+//
+// $Id: //poco/1.3/Data/MySQL/src/StatementExecutor.cpp#1 $
+//
+// Library: Data
+// Package: MySQL
+// Module:  StatementExecutor
+//
+// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// Permission is hereby granted, free of charge, to any person or organization
+// obtaining a copy of the software and accompanying documentation covered by
+// this license (the "Software") to use, reproduce, display, distribute,
+// execute, and transmit the Software, and to prepare derivative works of the
+// Software, and to permit third-parties to whom the Software is furnished to
+// do so, all subject to the following:
+// 
+// The copyright notices in the Software and this entire statement, including
+// the above license grant, this restriction and the following disclaimer,
+// must be included in all copies of the Software, in whole or in part, and
+// all derivative works of the Software, unless such copies or derivative
+// works are solely in the form of machine-executable object code generated by
+// a source language processor.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+
+
+#include <mysql.h>
+#include "Poco/Data/MySQL/StatementExecutor.h"
+
+
+namespace Poco {
+namespace Data {
+namespace MySQL {
+
+
+StatementExecutor::StatementExecutor(MYSQL* mysql)
+{
+	h = mysql_stmt_init(mysql);
+
+	if (!h)
+	{
+		throw StatementException("mysql_stmt_init error");
+	}
+
+	_state = STMT_INITED;
+}
+
+
+StatementExecutor::~StatementExecutor()
+{
+	mysql_stmt_close(h);
+}
+
+
+int StatementExecutor::state() const
+{
+	return _state;
+}
+
+
+void StatementExecutor::prepare(const std::string& query)
+{
+    if (_state >= STMT_COMPILED)
+    {
+        _state = STMT_COMPILED;
+        return;
+        //throw StatementException("Satement is already compiled");
+    }
+	
+    // compile
+    int res = mysql_stmt_prepare(h, query.c_str(), static_cast<unsigned int>(query.length()));
+
+    if (res != 0)
+    {
+        throw StatementException("mysql_stmt_prepare error", h, query);
+    }
+
+    _query = query;
+    _state = STMT_COMPILED;
+}
+
+
+void StatementExecutor::bindParams(MYSQL_BIND* params, size_t count)
+{
+	if (_state < STMT_COMPILED)
+	{
+		throw StatementException("Satement is not compiled yet");
+	}
+
+	if (count != mysql_stmt_param_count(h))
+	{
+		throw StatementException("wrong bind parameters count", 0, _query);
+	}
+
+	if (count == 0)
+	{
+		return;
+	}
+
+	int res = mysql_stmt_bind_param(h, params);
+
+	if (res != 0)
+	{
+		throw StatementException("mysql_stmt_bind_param() error ", h, _query);
+	}		
+}
+
+
+void StatementExecutor::bindResult(MYSQL_BIND* result)
+{
+	if (_state < STMT_COMPILED)
+	{
+		throw StatementException("Satement is not compiled yet");
+	}
+
+	int res = mysql_stmt_bind_result(h, result);
+
+	if (res != 0)
+	{
+		throw StatementException("mysql_stmt_bind_result error ", h, _query);
+	}		
+}
+
+
+void StatementExecutor::execute()
+{
+	if (_state < STMT_COMPILED)
+	{
+		throw StatementException("Satement is not compiled yet");
+	}
+
+	int res = mysql_stmt_execute(h);
+
+	if (res != 0)
+	{
+		throw StatementException("mysql_stmt_execute error", h, _query);
+	}
+
+	_state = STMT_EXECUTED;
+}
+
+
+bool StatementExecutor::fetch()
+{
+	if (_state < STMT_EXECUTED)
+	{
+		throw StatementException("Satement is not executed yet");
+	}
+
+	int res = mysql_stmt_fetch(h);
+
+	if ((res != 0) && (res != MYSQL_NO_DATA))
+	{
+		throw StatementException("mysql_stmt_fetch error", h, _query);
+	}
+
+	return (res == 0);
+}
+
+
+bool StatementExecutor::fetchColumn(size_t n, MYSQL_BIND *bind)
+{
+	if (_state < STMT_EXECUTED)
+	{
+		throw StatementException("Satement is not executed yet");
+	}
+
+	int res = mysql_stmt_fetch_column(h, bind, static_cast<unsigned int>(n), 0);
+
+	if ((res != 0) && (res != MYSQL_NO_DATA))
+	{
+		std::string msg;
+		msg += "mysql_stmt_fetch_column(";
+
+		char buff[30];
+		sprintf(buff, "%d", n);
+		msg += buff;
+
+		msg += ") error";
+		throw StatementException(msg, h, _query);
+	}
+
+	return (res == 0);
+}
+
+
+}}}