Error Unable To Allocate An Environment Handle Mysql
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Unable To Allocate An Environment Handle Oracle
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Community Podcasts MySQL.com Downloads Documentation Section Menu: MySQL Forums :: Connector/ODBC :: MySQL ODBC Driver 3.51 : System.InvalidOperationException: ERROR - unable to allocate an environment handle. New Topic Advanced Search MySQL ODBC Driver 3.51 : System.InvalidOperationException: ERROR - unable to allocate an environment handle. Posted by: Banty M () Date: January 28, 2015 09:06AM Hi, I am using MySQL ODBC Driver 3.51 to connect my database from windows machine using C# .Net. My program is performing multiple inserts & updates in many tables during batch processing. it is http://forum.gpsgate.com/viewtopic.php?t=9946 working fine for small batch file, however it is giving me below exception when my batch file is huge. i.e. 100K records. Moreover, my program is using single shared connection throughout processing the batch file. I have observed that my RAM utilization was getting up gradually and went down as soon as execution completes, however for huge file i am http://forums.mysql.com/read.php?37,627489,627489 getting below exception as soon as my RAM reaches to its cap. Let me know that how can i resolve this? System.InvalidOperationException: ERROR - unable to allocate an environment handle. at System.Data.Odbc.OdbcHandle..ctor(SQL_HANDLE handleType, OdbcHandle parentHandle) at System.Data.Odbc.OdbcConnection.CreateStatementHandle() at System.Data.Odbc.OdbcCommand.GetStatementHandle() at System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String method, Boolean needReader, Object[] methodArguments, SQL_API odbcApiMethod) at System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String method, Boolean needReader) at System.Data.Odbc.OdbcCommand.ExecuteNonQuery() Thanks in advance for your valuable input. Navigate:Previous Message•Next Message Options:Reply•Quote Subject Written By Posted MySQL ODBC Driver 3.51 : System.InvalidOperationException: ERROR - unable to allocate an environment handle. Banty M 01/28/2015 09:06AM Sorry, you can't reply to this topic. It has been closed. powered by phorum Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party. Contact Sales USA: +1-866-221-0634 Canada: +1-866-221-0634 Germany: +49 89 143 01280 France: +33 1 57 60 83 57 Italy: +39 02 249 59 120 UK: +44 207 553 8447 Japan: 0120-065556 China: 10800-811-0823 India: 0008001005870 More Countries» Contact Us On
resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards Events Community Magazine Forums Blogs Channel 9 Documentation https://msdn.microsoft.com/en-us/library/ms712576(v=vs.85).aspx APIs and reference Dev centers Retired content Samples We’re sorry. The content http://www.developerfusion.com/code/2118/handling-multiple-direct-odbc-calls-that-fail/ you requested has been removed. You’ll be auto redirected in 1 second. ODBC Programmer's Reference Developing Applications Connecting to a Data Source or Driver Connecting to a Data Source or Driver Allocating the Environment Handle Allocating the Environment Handle Allocating the Environment Handle Allocating the Environment Handle unable to Declaring the Application's ODBC Version Choosing a Data Source or Driver Allocating a Connection Handle ODBC Connection Attributes Driver Manager Connection Pooling Disconnecting from a Data Source or Driver Driver Manager's Role in the Connection Process TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived unable to allocate and is not being maintained. Allocating the Environment Handle The first task for any ODBC application is to load the Driver Manager; how this is done is operating-system dependent. For example, on a computer running Microsoft® Windows NT® Server/Windows 2000 Server, Windows NT Workstation/Windows 2000 Professional, or Microsoft Windows® 95/98, the application either links to the Driver Manager library or calls LoadLibrary to load the Driver Manager DLL.The next task, which must be done before an application can call any other ODBC function, is to initialize the ODBC environment and allocate an environment handle, as follows: The application declares a variable of type SQLHENV. It then calls SQLAllocHandle and passes the address of this variable and the SQL_HANDLE_ENV option. For example: Copy SQLHENV henv1; SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv1); The Driver Manager allocates a structure in which to store information about the environment, and returns the environment handle in the variable.The Driver Manager does not call SQLAllocHandle in the driver at this time because it does not know which driver to call. It delays calling SQLAllocHandle in the driver
Groups Books Podcasts Forum Jobs Home Database SQL Server Code Handling multiple Direct ODBC calls that fail. By Dale Harkness, published on 13 Mar 2002 | Filed in Comments C++ SQL SQL Server Have you ever tried to issue multiple direct ODBC calls only to have some of the calls after the first fail? I encountered this problem on a project I was working on. The first SQL command would complete successfully but some of the following SQL commands would fail. The error produced indicated that an "Invalid cursor state" existed. The message provided me with no clues to what the nature of the problem was. The following sample shows code that fails producing the "Invalid Cursor State" message. The UpdateUserName() function contained the commands that produced the error. The sample was issued to an MS SQL Server running version 6.5: //
// Change a given users name in the SQL database
//
void CSqlConnector::UpdateUserName( const char * pSysAdmnPwd, const char *pLogin, const char *pNewUserName, const char *pOldUserName )
{
CString SqlCommand;
try
{
// a DSN has been created earlier named MyDSN that
// points to the SQL server
AllocateODBCHandles( “MyDSN”, "sa", pSysAdmnPwd );
// issue a direct SQL call (call a system procedure in this case)
SqlCommand.Format( "sp_dropuser %s", pOldUserName );
ExecuteDirectODBC( m_hStmt, SqlCommand );
//
// NOTE: this command works without using the allocation/deallocation process
//
// switch to the user database
SqlCommand.Format( "USE %s", “MyDatabaseName” );
ExecuteDirectODBC( m_hStmt, SqlCommand );
//
// THIS STATEMENT FAILED FOR ME
//
// add the user with the new name
SqlCommand.Format( "sp_adduser %s, %s",