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Oracle TimesTen In-Memory Database Support User's Guide
11g Release 2 (11.2) for Windows
E21641-02
September 2012
Oracle Data Provider for .NET (ODP.NET) is an implementation of the Microsoft ADO.NET interface. ODP.NET support for Oracle TimesTen In-Memory Database (TimesTen) provides fast and efficient ADO.NET data access from .NET client applications to TimesTen databases.
This document covers only those aspects of ODP.NET that are specific to its use in a TimesTen environment. For more general information, refer to Oracle Data Provider for .NET Developer's Guide.
You can use ODP.NET with any of the following TimesTen installations:
TimesTen Data Manager only (for direct connections)
TimesTen Client only (for client/server connections, assuming a TimesTen Data Manager instance and TimesTen Server instance are accessible elsewhere)
TimesTen Data Manager with TimesTen Server and TimesTen Client (for either direct connections or client/server connections)
This document describes how to use ODP.NET in a TimesTen environment, covering the following topics:
There is also a Documentation Accessibility section at the end of this document.
This section discusses points you should be aware of before starting to use ODP.NET with TimesTen, covering the following topics:
This revision of the document is for the ODP.NET 11.2.0.3.0 release, which is the minimum ODP.NET release for use with TimesTen 11.2.2 releases. (The minimum ODP.NET release supporting TimesTen 11.2.1 releases is 11.2.0.2.0.)
Note the following:
The ODP.NET 11.2.0.3.0 release, as available in the corresponding Oracle Database patch set or Oracle Data Access Components (ODAC) release, supports TimesTen 11.2.1 (11.2.1.6.1 and higher) and 11.2.2 releases, specifically with the feature support documented in "ODP.NET namespace and class support with TimesTen".
ODP.NET for TimesTen is supported on all Microsoft Windows 32-bit and 64-bit platforms that support TimesTen.
The 32-bit version of ODP.NET must be used with a 32-bit instance of the TimesTen database or TimesTen client. Likewise, the 64-bit version of ODP.NET must be used with a 64-bit instance of the TimesTen database or TimesTen client.
ODP.NET for TimesTen supports .NET Framework 2.0, 3.0, and 3.5 with Microsoft Visual Studio 2005 or later, and .NET Framework 4 with Microsoft Visual Studio 2010.
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Note: TimesTen release 11.2.1.8.0 or higher is recommended. |
ODP.NET for TimesTen supports a subset of features currently available in ODP.NET for Oracle Database. In particular, ODP.NET for TimesTen supports the following features:
ODP.NET connection pooling
ODP.NET tracing
ODP.NET for TimesTen does not support these features:
ADO.NET Entity Framework object relational mapper
LINQ (Language-Integrated Query)
ODP.NET for TimesTen does not support interoperability with the following Oracle Database client components:
Oracle Developer Tools for Visual Studio
Oracle Database Extensions for .NET
Oracle Providers for ASP.NET
Note the following requirements to use ODP.NET with TimesTen:
You must install TimesTen Data Manager or TimesTen Client on your system. TimesTen is not provided with ODP.NET or OCI.
Your TimesTen installation must be installed with the PL/SQL option, and PL/SQL must be enabled for the TimesTen database through the connection attribute setting PLSQL=1 (the default) or the ODBC Data Source Administrator. Refer to the PL/SQL section of Oracle TimesTen In-Memory Database Release Notes for information about the small number of platforms that do not support PL/SQL.
ODP.NET support for TimesTen depends on Oracle Call Interface (OCI) support for TimesTen. Specifically, an OCI version provided with Oracle Database 11.2 releases is required. The current ODP.NET release must not, and will not, use the OCI version provided with TimesTen, which is under the tt_install_dir\ttoracle_home directory, where tt_install_dir is the TimesTen installation root directory. (There is no issue, however, in using the TimesTen version of OCI for OCI or Pro*C/C++ programs that do not use ODP.NET. Refer to "TimesTen Support for OCI" and "TimesTen Support for Pro*C/C++" in Oracle TimesTen In-Memory Database C Developer's Guide for information on those programming interfaces.)
Also see "Post-installation path considerations".
Requirements for the execution environment to use ODP.NET with Oracle Database apply to using ODP.NET with TimesTen as well. Refer to Oracle Data Provider for .NET Developer's Guide for information.
Some of the preceding discussion refers to documents in the Oracle TimesTen In-Memory Database and Oracle Database documentation libraries.
TimesTen documentation is available on the product distribution media, and on the Oracle Technology Network at the following location.
http://www.oracle.com/technetwork/products/timesten/documentation/
Oracle documentation is also available on the Oracle Technology network, at the following location.
http://www.oracle.com/technetwork/database/enterprise-edition/documentation/
This section discusses the following topics to help you start using ODP.NET. Note that installation steps are not TimesTen-specific.
This section covers the following installations:
Install ODP.NET as part of the Oracle Database 11.2 patch set
Install ODP.NET as part of ODAC 11.2 for Windows, OUI version
Install ODP.NET as part of ODAC 11.2 for Windows, XCopy version
The installation process for ODP.NET is independent of the TimesTen environment. Nothing is installed into the TimesTen installation directories.
Refer to Oracle Data Provider for .NET Developer's Guide for additional information about ODP.NET installation, including associated Windows registry entries.
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Important:
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Use these instructions to install ODP.NET as part of Oracle Database 11.2 patch sets.
This installation uses the Oracle Universal Installer (OUI), as would be the case in any Oracle Database environment. Run it by executing its setup.exe file (in the Disk1 location), then complete the following steps:
In the Select Installation Type dialog, typically choose the "Runtime" radio button, then choose Next.
(There are four installation options: Instant Client, Runtime, Custom, and Administrator. The Runtime option provides the Oracle client and ODP.NET. The Instant Client option does not provide ODP.NET. If you have reason to use a Custom installation, there is a check box for ODP.NET.)
In the resulting Download Software Updates dialog, you may choose the "Skip software updates" radio button at your discretion, as appropriate for your situation. Choose Next when you have finished.
In the resulting Select Product Languages dialog, use the default English language setting (or choose a desired language), then choose Next.
In the resulting Specify Installation Location dialog, you can typically use the default values for the Oracle base path and software location. Alternatively:
Enter the path (or browse) to your Oracle home location for the Oracle base path.
Enter the path (or browse) to a desired directory location under the Oracle home location where the software files will be installed.
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Important: Paths cannot have spaces. |
The installer will perform prerequisite checks and display a Summary dialog. Choose Install.
Use these instructions to install ODP.NET as part of the Oracle Universal Installer (OUI) version of Oracle Data Access Components (ODAC) 11.2 releases.
Run OUI by executing its setup.exe file, which you can access in the staging directory into which you unzip the ODAC ZIP file for OUI installation, then complete the following steps:
In the OUI welcome page, choose Next.
In the page to select a product to install, choose "Oracle Data Access Components for Oracle Client 11.2.x.x.x" (the appropriate point release number will be indicated). Then choose Next.
In the page to choose an installation location, you can either use the default value or specify an alternative location, as desired. Then choose Next.
In the page to choose available product components, confirm that Oracle Data Provider for .NET is selected (default). All other components are optional for ODP.NET. Then choose Next.
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Note: If Oracle Providers for ASP.NET is also selected, you will then see a page instructing you to run a set of SQL scripts at a specified location. Note that Oracle Providers for ASP.NET is not relevant to TimesTen. |
If there are multiple versions of Visual Studio on your system, the "Oracle Developer Tools for Visual Studio" page lists the versions so you can choose which versions you would like to have configured with Oracle Data Access Components for Oracle Client. Then choose Next. Note that Oracle Developer Tools for Visual Studio is not relevant to TimesTen.
If your system has only one version of Visual Studio, that version is automatically configured with Oracle Data Access Components for Oracle Client and you will not see this page.
In the summary page, choose Install.
Use these instructions to install ODP.NET as part of the Oracle XCopy version of Oracle Data Access Components (ODAC) 11.2 releases. The installation process is the same for the 64-bit version as for the 32-bit version.
XCopy provides system administrators with an ODP.NET client that is smaller than the standard ODP.NET client and can be configured more easily, with finer-grained control than OUI offers. This makes it more convenient for production deployments to large numbers of computers, and simplifies the embedding of ODP.NET in customized deployment packages.
This installation does not use the Oracle Universal Installer. Instead, run the installation by executing the install.bat batch file, which you can access in the installation directory into which you unzip the ODAC ZIP file for XCopy installation.
This is a summary of the installation instructions. For further details, refer to readme.txt, which will also be located in the installation directory.
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Important: Thereadme.txt file emphasizes the following points.
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Execute install.bat to specify the desired ODAC products to install. For example, assuming C:\oracle\odac is your installation directory and odachome is your Oracle home name for ODAC, use the following command to install the client with only ODP.NET for .NET 2.0 libraries:
install.bat odp.net2 C:\oracle\odac odachome
Or this command to install the client with only ODP.NET for .NET 4 libraries:
install.bat odp.net4 C:\oracle\odac odachome
Alternatively, use the following command to install the client with all ODAC products:
install.bat all C:\oracle\odac odachome
ODP.NET will always find and use the appropriate version of OCI; namely, the Oracle client version and not the TimesTen Instant Client version. In addition, check the following for your path:
Confirm that the PATH setting has the location of the TimesTen shared libraries at tt_install_dir\bin, where tt_install_dir is the TimesTen installation root directory. This should follow any other Oracle directories in the path.
For an XCopy installation, add your ODAC installation directory and ODAC installation bin directory to the PATH setting, preceding any other Oracle directories, including TimesTen directories. For example, if C:\oracle\odac is the installation directory:
set PATH=C:\oracle\odac;C:\oracle\odac\bin;%PATH%
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Note: Refer to the Oracle Data Provider for .NET README file for any further information about setting up ODP.NET. |
For information about uninstalling Oracle Database products, including ODP.NET, refer to "Removing Oracle Database Software" in Oracle Database Installation Guide for Microsoft Windows.
To uninstall an XCopy installation, execute the uninstall.bat batch file from your ODP.NET installation directory (refer to "Install ODP.NET as part of ODAC 11.2 for Windows, XCopy version"), specifying the product to uninstall (or all products) and the Oracle home name for ODAC products. For example, to uninstall a client with ODP.NET for .NET 2.0 libraries, assuming the Oracle home name is odachome:
uninstall.bat odp.net2 odachome
Or to uninstall all ODAC products:
uninstall.bat all odachome
You can use the Visual Studio IDE to build your application, or you can use the csc.exe command-line compiler executed from the Visual Studio command prompt. The following example uses csc.exe (where the input is all one command line):
C:\Temp> csc /out:myapp.exe /reference:C:\app\mydir\path\
Oracle.DataAccess.dll myapp.cs
Microsoft (R) Visual C# 2005 Compiler version 8.00.50727.3053
for Microsoft (R) Windows (R) 2005 Framework version 2.0.50727
Copyright (C) Microsoft Corporation 2001-2005. All rights reserved.
The location of the Oracle.DataAccess.dll assembly and dependent libraries is according to your type of Oracle installation and the .NET version (2.x or 4) of the ODP.NET assembly. Refer to Oracle Data Provider for .NET Developer's Guide and the ODP.NET README file for information.
ODP.NET 11.2 releases support multiple simultaneous connections to TimesTen and Oracle databases. Existing applications written for the ODP.NET interface can access TimesTen with a minimal set of changes to their application code.
In a TimesTen environment, ODP.NET uses OCI to interact with the TimesTen database. Therefore, an ODP.NET application can connect to TimesTen using either the tnsnames or the easy connect naming method, as with Oracle Database. See "Configuring Naming Methods" in Oracle Database Net Services Administrator's Guide for information about the tnsnames and easy connect naming methods beyond what is provided below.
This section covers the following topics:
Configuring whether to use tnsnames or easy connect naming method
Setting TimesTen connection attributes in ODP.NET connection strings
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Notes:
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TimesTen supports tnsnames syntax. You can use a TimesTen tnsnames.ora entry in the same way you would use an Oracle tnsnames.ora entry.
The syntax of a TimesTen entry in the tnsnames.ora file is as follows:
tns_entry = (DESCRIPTION = (CONNECT_DATA = (SERVICE_NAME = dsn) (SERVER = timesten_direct | timesten_client)))
Where tns_entry is an arbitrary TNS name you assign to the entry. Note the following:
DESCRIPTION and CONNECT_DATA are required as shown.
For SERVICE_NAME, dsn must be a TimesTen data source name (DSN) that is defined in the ODBC Data Source Administrator and is visible to the user running the ODP.NET application.
For SERVER, timesten_direct specifies a direct connection to a TimesTen database, while timesten_client specifies a client/server connection. If you specify timesten_direct, then dsn must be a TimesTen Data Manager DSN. If you specify timesten_client, then dsn must be a TimesTen Client DSN.
The following is a sample tnsnames.ora entry for a direct connection to the TimesTen database referenced by the DSN my_dsn:
my_tnsname = (DESCRIPTION =
(CONNECT_DATA =
(SERVICE_NAME = my_dsn)
(SERVER = timesten_direct)))
To connect as user scott with password tiger to the my_dsn TimesTen database that is referenced by the my_tnsname entry in the tnsnames.ora file, specify the following connection string in your ODP.NET application:
"User Id=scott;Password=tiger;Data Source=my_tnsname"
To connect as the current operating system user to my_dsn that is referenced by the my_tnsname entry in the tnsnames.ora file, specify the following connection string in your ODP.NET application. The current operating system user must be either the TimesTen instance administrator or a defined TimesTen external user.
"User Id=/;Data Source=my_tnsname"
TimesTen supports easy connect syntax, which allows connections to be made without configuring a tnsnames.ora entry. The syntax of a TimesTen easy connect string is as follows:
host/service_name:server
Note the following:
A host name must be specified to satisfy easy connect syntax, but is otherwise ignored by TimesTen. The name localhost is typically used by convention.
For service_name, specify a TimesTen DSN that is defined in the ODBC Data Source Administrator and is visible to the user running the ODP.NET application.
For server, timesten_direct specifies a direct connection to a TimesTen database, while timesten_client specifies a client/server connection. If you specify timesten_direct, then service_name must be a TimesTen Data Manager DSN. If you specify timesten_client, then service_name must be a TimesTen Client DSN.
To establish a direct connection as user scott with password tiger to the TimesTen database referenced by the my_dsn DSN, specify the following connection string in your ODP.NET application:
"User Id=scott;Password=tiger;Data Source=localhost/my_dsn:timesten_direct"
To establish a direct connection as the current operating system user to the TimesTen database referenced by my_dsn, specify the following connection string in your ODP.NET application. The current operating system user must be either the TimesTen instance administrator or a defined TimesTen external user.
"User Id=/;Data Source=localhost/my_dsn:timesten_direct"
If a sqlnet.ora file is present, it specifies the naming methods that will be tried and the order in which they will be tried. ODP.NET will look for a sqlnet .ora file with the following precedence:
If the TNS_ADMIN environment variable has been set, it will look in that specified location.
If TNS_ADMIN has not been set, it will look in the Oracle Database default location as noted in "Parameters for the sqlnet.ora File" in Oracle Database Net Services Reference.
If sqlnet.ora is found, you can use only naming methods that are indicated there. If sqlnet.ora is not found, you can use either the tnsnames or easy connect naming method.
In TimesTen, sample copies of the tnsnames.ora and sqlnet.ora files are in the tt_install_dir\network\admin\samples directory, where tt_install_dir is the TimesTen installation root directory. The following is the sqlnet.ora file that TimesTen provides, which supports both the tnsnames naming method and the easy connect naming method:
# To use ezconnect syntax or tnsnames, the following entries must be # included in the sqlnet.ora configuration. NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
With this setting, ODP.NET will first look for tnsnames syntax in your connection strings. If it cannot find tnsnames syntax, it will look for easy connect strings.
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Important: Oracle Database network libraries are provided with ODP.NET. ODP.NET does not use the copy of the Oracle Database network libraries provided with the Instant Client shipped with TimesTen. (That location, for reference, istt_install_dir\ttoracle_home\instantclient_11_2 for the Oracle Database 11.2 Instant Client shipped with TimesTen 11.2.2 releases, or instantclient_11_1 for the Oracle Database 11.1 Instant Client shipped with TimesTen 11.2.1 releases.) |
You can set TimesTen connection attributes within the Password setting of your ODP.NET connection string, with syntax as follows:
Components of the Password setting, including the password setting itself and any TimesTen connection attribute settings, are delimited by semi-colons.
Whenever the Password setting has semi-colons, the entire setting must be quoted.
Because the ODP.NET connection string as a whole is quoted, the begin quotation mark and end quotation mark of the Password setting must each be preceded by the "\" escape character.
The following example specifies lion as the password for user scott in TimesTen. It also sets the TimesTen OraclePWD connection attribute, which specifies the password tiger for user scott in Oracle Database, for use of Oracle In-Memory Database Cache (IMDB Cache).
"Data Source=mysource;User Id=scott;Password=\"lion;OraclePwd=tiger\"";
The next example again specifies lion as the password for scott in TimesTen. This time, it sets the TimesTen OracleNetServiceName connection attribute as well as the OraclePWD connection attribute. OracleNetServiceName specifies the Oracle ID in Oracle Database, with the OraclePWD setting specifying the corresponding password tiger. Finally, this example sets the TimesTen passthrough level to 1.
"Data Source=mysource;User ID=scott;Password=\"lion;OraclePwd=tiger; OracleNetServiceName=mytest-pc.example.com;passthrough=1\"";
(For general information about TimesTen connection attributes, refer to "Connection Attributes" in Oracle TimesTen In-Memory Database Reference. For information about IMDB Cache and passthrough levels, refer to Oracle In-Memory Database Cache User's Guide.)
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Note: As always, you can also set TimesTen connection attributes in your TimesTen DSN definition in ODBC Data Source Administrator, as shown in "Managing TimesTen Databases" in Oracle TimesTen In-Memory Database Operations Guide. This is not secure, however, so is not advisable for password settings such as theOraclePWD attribute. |
Perform the following steps to test ODP.NET with TimesTen in a .NET 2.x or 4 environment. (Remember that for .NET 4 you must install Visual Studio 2010 and work in Visual Studio Command Prompt 2010.)
You must have a TimesTen installation, including the Quick Start sample programs, to perform these tests.
Where tt_install_dir is the TimesTen installation root directory, execute the build_sampledb.bat script from the tt_install_dir\quickstart\sample_scripts\createdb\ directory. This creates a TimesTen database, sampledb_1122, with users and objects.
Copy the ODP.NET sample program DemoODP.cs to your system. It is located in the following TimesTen Quick Start directory:
tt_install_dir\quickstart\sample_code\odp.net\
Create a tnsnames.ora file that contains the following:
SAMPLEDB_1122 =(DESCRIPTION=(CONNECT_DATA = (SERVICE_NAME = SAMPLEDB_1122)(SERVER = timesten_direct)))
Open Visual Studio Command Prompt and set the environment variable TNS_ADMIN to specify the location of the tnsnames.ora file you created. For example:
>set TNS_ADMIN=c:\mytnsdir\sqlnet
Navigate to the directory where DemoODP.cs was placed and compile the DemoODP program. For example:
csc /out:DemoODP.exe /reference:C:\path\Oracle.DataAccess.dll DemoODP.cs
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Notes:
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Execute DemoODP as follows. (The database name, user name, and password are determined automatically during execution of build_sampledb.bat.)
DemoODP -db sampledb_1122 -user appuser -passwd welcome1
This should produce the following output:
Start Test The employee who got the 10% pay raise was CLARK Employees in department #50: 7944, ITMGR, MANAGER, 7839, 10/08/2010 10:34:20 AM, 2500, <NULL>, 50 7945, DVLPR1, DEVELOPER, 7944, 10/08/2010 12:00:00 AM, 2000, <NULL>, 50 7946, DVLPR2, DEVELOPER, 7944, 10/08/2010 12:00:00 AM, 2000, <NULL>, 50 7947, DVLPR3, DEVELOPER, 7944, 10/08/2010 12:00:00 AM, 2000, <NULL>, 50 7948, DVLPR4, DEVELOPER, 7944, 10/08/2010 12:00:00 AM, 2000, <NULL>, 50 7949, DVLPR5, DEVELOPER, 7944, 10/08/2010 12:00:00 AM, 2000, <NULL>, 50 7950, DVLPR6, DEVELOPER, 7944, 10/08/2010 12:00:00 AM, 2000, <NULL>, 50 7951, DVLPR7, DEVELOPER, 7944, 10/08/2010 12:00:00 AM, 2000, <NULL>, 50 7952, DVLPR8, DEVELOPER, 7944, 10/08/2010 12:00:00 AM, 2000, <NULL>, 50 7953, DVLPR9, DEVELOPER, 7944, 10/08/2010 12:00:00 AM, 2000, <NULL>, 50 7954, DVLPR10, DEVELOPER, 7944, 10/08/2010 12:00:00 AM, 2000, <NULL>, 50 Test finished
This section discusses points to be aware of when developing applications to use ODP.NET in a TimesTen environment, covering the following topics:
When processing result sets generated from executing statements and creating REF CURSORs, the behavior when transactions in TimesTen connections are committed differs from that when transactions in Oracle Database connections are committed. When a transaction is committed in TimesTen while a result set of an OracleDataReader object is open, the result set will be closed automatically, unlike in an Oracle database. This applies to explicit commits, autocommit, and implicit commits.
In TimesTen, an implicit commit occurs after a DDL statement. In ODP.NET, an implicit commit also occurs when an OracleCommand object is executed without there first being an OracleTransaction object instantiated from the command connection. An explicit commit occurs when the Commit method is called on an OracleTransaction object. In either case, if a commit occurs in a TimesTen connection before a result set that is open in the transaction is completely processed, the "Function sequence error" exception may be thrown.
This difference in behavior is likely to occur when the execution of an OracleCommand object is interleaved with the processing of a result set associated with another OracleCommand object. To avoid the "Function sequence error" exception, the execution and processing of a result set should be contained exclusively within the context of an OracleTransaction object. This will prevent a commit from occurring before all rows of the result set are retrieved.
The occurrence of a "Function sequence error" exception may depend on the value of the FetchSize property of an OracleCommand, OracleRefCursor or OracleDataReader object. If the FetchSize property is not explicitly set or if it is set to a large value, then many rows may be fetched by the application before the "Function sequence error" exception is thrown.
You can call TimesTen built-in procedures directly from TimesTen OCI only for built-ins that do not return a result set. Therefore, this restriction also applies to ODP.NET when used with TimesTen.
Use an OracleCommand instance to call a built-in, as in the following example. This assumes an OracleConnection instance conn with a connection to TimesTen has been established. Call the Dispose method to free resources when you have finished using the OracleCommand instance.
// switching to passthrough 1 mode using ttOptSetFlag built-in function
string switchModeStmt = "call ttOptSetFlag('passthrough', 1)";
OracleCommand switchCmd = new OracleCommand(switchModeStmt, conn);
switchCmd.CommandType = CommandType.Text;
switchCmd.ExecuteNonQuery();
switchCmd.Dispose();
For built-in procedures that do return a result set, the result set would not be accessible through ODP.NET. However, if you call the built-in from a PL/SQL program, you could access the result set as a REF CURSOR through PL/SQL.
This section discusses limitations that are known as of release time.
In TimesTen version 11.2.1.6.1, an attempt to write to protected memory may occur if you call PL/SQL procedures when statement caching is enabled (BugDB 10231354). To resolve this problem, upgrade to TimesTen version 11.2.1.7.0 or later.
The self-tuning statement cache will disable itself if it detects that not enough memory is available for its operations. Note that when an application uses a direct (as opposed to client/server) connection to TimesTen, the entire database is loaded into memory, thereby reducing memory available for the statement cache and making this behavior more likely.
This section discusses solutions for various exceptions you may encounter.
Exception "ORA-44818: PL/SQL feature not installed in this TimesTen database"
Enable PL/SQL for the TimesTen database by setting the PLSQL connection attribute to 1 in the ODBC Data Source Administrator. ODP.NET applications cannot connect to TimesTen databases that are not PL/SQL-enabled.
Exception "TimesTen database version is less than the minimum required version of 11.2.1.6.1"
Change the service name in the tnsname.ora entry or easy connect string to reference a TimesTen database of version 11.2.1.6.1 or greater. TimesTen ODP.NET applications cannot connect to TimesTen database versions prior to 11.2.1.6.1.
Exception "ORA-12154: TNS: Could not resolve the connect identifier specified" or "ORA-12541: TNS: No listener"
To connect to a TimesTen database from an ODP.NET application, the Data Source attribute in the ODP.NET connection string must be set either to the TNS name of a TimesTen entry in the tnsnames.ora file or to a TimesTen easy connect string.
If the tnsnames naming method is used to connect, verify that an entry in the tnsnames.ora file is associated with a TimesTen DSN. Also verify that the TNS_ADMIN environment variable is set to the directory where the tnsnames.ora file is located.
If the easy connect naming method is used to connect, verify that service_name is set to a TimesTen DSN and that server is set to either timesten_direct or timesten_client, depending on whether the DSN configures a direct connection or a client/server connection.
Exception "ORA-29158: Unable to open library"
If you are connecting to a TimesTen database, verify either that the entry in the tnsnames.ora file is associated with a TimesTen DSN or that service_name in the easy connect string is set to a TimesTen DSN.
This error may also occur due to a path issue, if ODP.NET cannot find the TimesTen ODBC driver, which is located in the TimesTen tt_install_dir\bin directory. (Also see the next troubleshooting item.)
Exception "ORA-29159: Unable to read library"
In addition to the steps for ORA-29158 above, verify that the server setting in the tnsnames.ora file entry or easy connect string is timesten_direct or timesten_client, as appropriate for the type of TimesTen DSN.
See "Connecting to a TimesTen database from OCI" in Oracle TimesTen In-Memory Database C Developer's Guide for information about tnsnames.ora and easy connect.
Exception "The application has failed to start because ttcommonxxxx.dll was not found. Re-installing the application may fix the problem"
This indicates that the location of the TimesTen shared libraries at tt_install_dir\bin is not in the PATH environment variable setting.
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Note: Instead of "xxxx", the DLL file name will indicate the TimesTen release. In TimesTen 11.2.2 releases the file name isttcommon1122.dll. In TimesTen 11.2.1 releases it is ttcommon1121.dll. |
Exception "Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
If you have an existing ODP.NET program and want to see whether it uses ODP.NET features that TimesTen does not support, you can use the ttSrcScan command line utility (version 11.2.1.8.0 or higher) to scan your program for unsupported functions, types, type codes, attributes, modes, and constants. This is a standalone utility that can be run without TimesTen or Oracle being installed and runs on any platform supported by TimesTen. It reads source code files as input and creates HTML and text files as output. If the utility finds unsupported items, then they are logged and alternatives are suggested. You can find the ttSrcScan executable in the quickstart/sample_util directory in your TimesTen installation.
Specify an input file or directory for the program to be scanned and an output directory for the ttSrcScan reports. Other options are available as well. See the README file in the sample_util directory for information.
This reference section documents support for ODP.NET namespaces and classes in a TimesTen environment.
ODP.NET implements the classes, enumerations, interfaces, delegates, and structures of the Oracle.DataAccess.Client and Oracle.DataAccess.Types namespaces. The Oracle.DataAccess.Client namespace contains implementations of core ADO.NET classes, enumerations for ODP.NET, and ODP.NET-specific classes. The Oracle.DataAccess.Types namespace provides classes, structures, and exceptions for Oracle native types that can be used with ODP.NET. See Oracle Data Provider for .NET Developer's Guide for information about these namespaces beyond what is provided below. You must have access to them in your program as follows:
using Oracle.DataAccess.Client; using Oracle.DataAccess.Types;
The following sections list TimesTen support for the ODP.NET classes, enumerations and types of the Oracle.DataAccess.Client and Oracle.DataAccess.Types namespaces that are documented for ODP.NET 11.2 releases:
|
Note: When connecting to a TimesTen database from an ODP.NET application, your application can use only ODP.NET features that correspond to features that TimesTen supports. This is reflected in what is supported for the namespaces discussed here.For example, you cannot use Oracle Streams Advanced Queueing because TimesTen does not support this feature. |
The following tables list support for delegates, classes, and enumerations of the Oracle.DataAccess.Client namespace.
Table 1 Oracle.DataAccess.Client namespace delegate support
| Delegate Name | Supported? |
|---|---|
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
Yes |
|
|
No |
|
|
Yes |
|
|
Yes |
Table 2 Oracle.DataAccess.Client namespace class support
| Class Name | Supported? | Notes |
|---|---|---|
|
|
No | |
|
|
No | |
|
|
No | |
|
|
No | |
|
|
No | |
|
|
No | |
|
|
No | |
|
|
No | |
|
|
No | |
|
|
Yes | |
|
|
Yes |
See "OracleCommand class support" for information about TimesTen support for properties and public methods of this class. |
|
|
Yes | |
|
|
Yes |
See "OracleConnection class support" for information about TimesTen support for properties and public methods of this class. |
|
|
Yes | |
|
|
Yes | |
|
|
Yes |
See "OracleDataReader class support" for information about TimesTen support for properties and public methods of this class. |
|
|
Yes | |
|
|
No | |
|
|
Yes | |
|
|
Yes | |
|
|
Yes | |
|
|
No | |
|
|
No | |
|
|
No | |
|
|
Yes | |
|
|
No | |
|
|
No | |
|
|
Yes | |
|
|
Yes | |
|
|
Yes | |
|
|
Yes | |
|
|
No | |
|
|
Yes | |
|
|
Yes | |
|
|
Yes |
See "OracleTransaction class support" for information about TimesTen support for properties and public methods of this class. |
|
|
No | |
|
|
No |
Table 3 Oracle.DataAccess.Client namespace enumeration support
| Enumeration Name | Supported? |
|---|---|
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
Yes |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
Yes |
|
|
No |
|
|
No |
The rest of this section presents the following:
The following tables list support for properties and methods of the OracleCommand class.
Table 4 OracleCommand class property support
| Property Name | Supported? |
|---|---|
|
|
No |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
Yes |
|
|
No |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
Yes |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
No |
|
|
No |
The following tables list support for properties and methods of the OracleConnection class.
Table 6 OracleConnection class property support
| Property Name | Supported? |
|---|---|
|
|
No |
|
|
No |
|
|
No |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
No |
|
|
No |
|
|
Yes |
|
|
No |
|
|
No |
|
|
No |
|
|
Yes |
|
|
No |
|
|
Yes |
|
|
Yes |
Table 7 OracleConnection class method support
| Method Name | Supported? | Notes |
|---|---|---|
|
|
Yes | |
|
|
Yes | |
|
|
Yes | |
|
|
No | |
|
|
Yes | |
|
|
Yes | |
|
|
Yes | |
|
|
No |
TimesTen does not support distributed transactions through OCI. Therefore, an ODP.NET application cannot use distributed transactions in a TimesTen connection. |
|
|
No |
See |
|
|
No | |
|
|
Yes |
Returns metadata collections of tables, columns, users, and other objects that allow application developers to discover and enumerate database information. This information is specific to TimesTen and may differ from corresponding metadata collections returned from Oracle Database. For example, TimesTen does not support the |
|
|
Yes | |
|
|
Yes | |
|
|
No | |
|
|
Yes | |
|
|
No |
OracleConnectionType, an enumeration and public OracleConnection class property, allows an ODP.NET application to determine whether a particular connection object is associated with a TimesTen database connection, an Oracle database connection, or no physical connection at all. The property has the following signature:
public OracleConnectionType ConnectionType
It returns one of the following values from the OracleConnectionType enumeration:
OracleConnectionType.Undefined: No connection is associated with the OracleConnection object OracleConnectionType.Oracle: The OracleConnection object is associated with an Oracle database OracleConnectionType.TimesTen: The OracleConnection object is associated with a TimesTen database
The following tables list support for properties and methods of the OracleDataReader class.
Table 8 OracleDataReader class property support
| Property Name | Supported? |
|---|---|
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
No |
|
|
No |
|
|
Yes |
|
|
Yes |
Table 9 OracleDataReader class method support
| Method Name | Supported? |
|---|---|
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
Yes |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
No |
|
|
No |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
No |
|
|
No |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
Yes |
|
|
No |
|
|
Yes |
The following tables list support for structures, exceptions, classes, interfaces, and enumerations of the Oracle.DataAccess.Types namespace.
Table 12 Oracle.DataAccess.Types namespace structure support
| Structure Name | Supported? |
|---|---|
|
|
Yes |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
No |
|
|
Yes |
|
|
Yes |
|
|
No |
|
|
No |
Table 13 Oracle.DataAccess.Types namespace exception support
| Class Name | Supported? |
|---|---|
|
|
Yes |
|
|
Yes |
|
|
Yes |
Table 14 Oracle.DataAccess.Types namespace class support
| Class Name | Supported? |
|---|---|
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
No |
|
|
Yes |
|
|
No |
|
|
No |
|
|
No |
For information about Oracle's commitment to accessibility, visit the Oracle Accessibility Program website at http://www.oracle.com/pls/topic/lookup?ctx=acc&id=docacc.
Access to Oracle Support
Oracle customers have access to electronic support through My Oracle Support. For information, visit http://www.oracle.com/pls/topic/lookup?ctx=acc&id=info or visit http://www.oracle.com/pls/topic/lookup?ctx=acc&id=trs if you are hearing impaired.
Oracle Data Provider for .NET Oracle TimesTen In-Memory Database Support User's Guide, 11g Release 2 (11.2) for Windows
E21641-02
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