sqldisconnect.c

来自「这个是内存数据库的客户端」· C语言 代码 · 共 77 行

/*
 * The contents of this file are subject to the MonetDB Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://monetdb.cwi.nl/Legal/MonetDBLicense-1.1.html
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is the MonetDB Database System.
 *
 * The Initial Developer of the Original Code is CWI.
 * Portions created by CWI are Copyright (C) 1997-2007 CWI.
 * All Rights Reserved.
 */

/*
 * This code was created by Peter Harvey (mostly during Christmas 98/99).
 * This code is LGPL. Please ensure that this message remains in future
 * distributions and uses of this code (thats about all I get out of it).
 * - Peter Harvey [e-mail]
 * 
 * This file has been modified for the MonetDB project.  See the file
 * Copyright in this directory for more information.
 */

/**********************************************************************
 * SQLDisconnect
 * CLI Compliance: ISO 92
 *
 * Author: Martin van Dinther
 * Date  : 30 aug 2002
 *
 **********************************************************************/

#include "ODBCGlobal.h"
#include "ODBCDbc.h"
#include "ODBCStmt.h"

SQLRETURN SQL_API
SQLDisconnect(SQLHDBC hDbc)
{
	ODBCDbc *dbc = (ODBCDbc *) hDbc;

#ifdef ODBCDEBUG
	ODBCLOG("SQLDisconnect " PTRFMT "\n", PTRFMTCAST hDbc);
#endif

	if (!isValidDbc(dbc))
		return SQL_INVALID_HANDLE;

	clearDbcErrors(dbc);

	/* check connection state, should be connected */
	if (!dbc->Connected) {
		/* Connection does not exist */
		addDbcError(dbc, "08003", NULL, 0);
		return SQL_ERROR;
	}

	while (dbc->FirstStmt != NULL)
		if (ODBCFreeStmt_(dbc->FirstStmt) == SQL_ERROR)
			return SQL_ERROR;

	/* client waves goodbye */
	mapi_disconnect(dbc->mid);
	mapi_destroy(dbc->mid);

	dbc->mid = NULL;
	dbc->Mdebug = 0;
	dbc->Connected = 0;

	return SQL_SUCCESS;
}