What is ODBC What is ODBC Summary. The purpose of this document is to answer some frequently asked questions regarding ODBC, particularly in regard to its use within Batch. What is ODBC How does it work Who provides ODBC drivers What is a registered ODBC sourceCan We Batch Data That Is On A UnixAS4. Mainframe Box What Happens When You Clean A Database What Happens During Automatic CleaningWhy Cant Batch Open All Tables Resuming An Automatic Run. What Is A Unique Record Identifier What Is The Intermediate Database Where Is The Intermediate Database Stored How Big Is The Intermediate Database How Can We Delete ItWhy Do We Use An Intermediate Database Instead Of Updating As We Go What Is DAO And Why Do We Use It What Happens During Interactive Cleaning What Happens When You Commit Why Did Commit Say There Are No Records Matching The Specified FilterWhat Happens When A Commit Fails Solution. What Is ODBC Open Database Connectivity ODBC is a standard that allows programs to read from almost all of the databases currently available. This means that Batch can read database formats like Microsoft Access, Paradox, d. Microsoft Access Odbc Connection As400 Systems' title='Microsoft Access Odbc Connection As400 Systems' />Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Easily share your publications and get. AS400 I thought everyone had stopped using that by now. I cant think of any addons for Access that would do this. Base and Fox. Pro spreadsheets like Microsoft Excel and connect to external database servers such as Oracle, Informix or Microsoft SQL Server. Or For A Technical DefinitionOpen Database Connectivity ODBC technology provides a common interface for accessing heterogeneous SQL databases. ODBC is based on Structured Query Language SQL as a standard for accessing data. This interface provides maximum interoperability a single application can access different SQL Database Management Systems DBMS through a common set of code. Q I am looking for a way to print the subsystem description for each subsystem on the AS400. I have only found a way to do this one subsystem at a time. The current identity NT AUTHORITYNETWORK SERVICE does not have write access x1. Excel documents. Extract data from the iSeries The best way to get external data from the iSeries 400 is by using an ODBC driver. The Client Access ODBC driver is. This enables a developer to build and distribute a clientserver application without targeting a specific DBMS. Database drivers are then added to link the application to the users choice of DBMS. How Does It WorkRather than having to know about each type of database, an application just talks to an ODBC driver that understands that format. This means that, once the ODBC driver for a particular type of database is provided, any program can read databases in that format. If a new database format needs to be worked with, then all that is required is to install the relevant driver. The figure above shows how ODBC fits in between an application and the database it is accessing. Who Provides ODBC DriversWhen installing Batch, if the Database Connectivity option is left checked, then ODBC drivers will be installed for the following database formats Microsoft Access, d. Base, Excel, Fox. Pro, Oracle, SQL Server and Paradox. If you need drivers that are not included then they should be available from the supplier or manufacturer of the database check on their web site, as they are often available free of charge. Tech Note Batch will not display the new database types unless it has additional information about the driver, stored in qaworld. However, it is still possible to use the new driver by using it to establish a Registered ODBC Source. Batch does not need ODBC to operate, but does require DAO. The System Components installation option installs all the basics Batch needs it must be run on every machine you want to run Batch from. What Is A Registered ODBC Source A Registered ODBC Source is a way of storing all the information needed to make an ODBC connection it can then be referred to by a single name the data source name DSN. The application can then establish a connection without needing to know where or what type of database it is connecting to, making it easy for administrators to move or update the source. You would use a Registered ODBC Source when you need to connect to an external database server it is the only way of doing so or if you frequently connect to a particular database. To examine ODBC settings on your machine, go to the Control Panel and open the ODBC icon. The figure above shows what it looks like on various platforms. The ODBC Data Source Administrator that starts up displays all the drivers installed on your machine under the Drivers tab along with their version, connections for all who use your machine under the System DSN tab and connections set up solely for you under the User DSN tab. Canon Camera Powershot A470 Software Downloads. To create a new DSN click on the Add button and use the wizard that appears to set up all the settings required. Click on Configure to modify an existing DSN. Can We Batch Data That Is On A UnixAS4. Mainframe Box Yes. All you need is the appropriate ODBC driver such as the SQL Server driver provided with QAS Batch and to set up your server as a Registered ODBC Source. You might need to provide a username and password in order to make the connection. What Happens When You Clean A DatabaseThe following section explains what database reading and writing goes on during a Batch run, and what affect this has on Batch cleaning. The figure above shows a simplified picture of how the cleaning process work. What Happens During Automatic Cleaning If you set up a session by selecting a database and driver then Batch automatically makes an ODBC connection to the database on your behalf, using those settings. If, instead, you use a Registered ODBC Source then the connection information has already been set up on your machine, so Batch just needs to open the link. Tech Note Text files. ODBC, as QAS have a more comprehensive system for working with them. This, by the way, is why input file filtering is not available for text files, as only ODBC provides it. Records are read from the database, one at a time, cleaned and then written to the intermediate database. Therefore, the user performing the automatic run requires write access to the session file and intermediate database, and read access to the source database. Why Cant Batch Open All Tables Batch reads databases through ODBC, which does not support as rich a set of allowed table and field names as does, say, Microsoft Access. It is recommended that spaces, commas, quotes and other difficult characters should be excluded from the names of any tables or fields you wish to process. Resuming An Automatic Run. The Batch session goes into a suspended state if the user chooses to suspend or if there is a system crash. Normally the run can be resumed at the last record read, but this is only possible if the database has a unique record identifier. What Is A Unique Record Identifier A unique record identifier UID, or row identifier, allows individual records in a database to be directly referenced. Without it there is no random access to records, no way to refer to a particular record. This also means that Batch cannot update data in place when it comes to the Commit stage. When such a database is selected a warning is given in the Setup Wizard, the Suspend button is renamed Stop, and Commit will only write out the cleaned addresses to a text file. What Is The Intermediate Database The intermediate database IDB is where the original input fields, reference fields and cleaned output address fields are kept. It is updated during Automatic and Interactive cleaning and Commit operations. Where Is The Intermediate Database Stored Initially, all intermediate databases are stored in the same place as the session files. The location of a sessions IDB and all future IDBs can be changed when configuring a session it is shown at the bottom of the Enter Filename page of the wizard modify it by clicking on the Change button. How Big Is The Intermediate Database As the IDB holds original and cleaned address fields as well as the reference fields, it can be as large as twice the size of the source database. However, it will frequently be smaller as it does not include any fields or tables that are not part of the Batch run. How Can We Delete It The IDB is automatically deleted when a session is deleted. It is also deleted when a fresh Batch run is started on an existing session, or when a fully cleaned session is Reconfigured and then saved.