Perl Odbc Error Handling
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the DBD::ODBC module. We'll describe DBD::ODBC first and then take a deeper look at Win32::ODBC. 7.4.1. DBD::ODBC The perl connect to sql server DBD::ODBC module was written by Tim Bunce and Jeff Urlwin, based on perl dbi odbc original code by Thomas K. Wenrich. It's a Perl extension written in C and is not tied to perl dbi odbc example Microsoft Win32 platforms. That makes it a good option for directly using ODBC on Unix, VMS, and other non-Windows systems. Being a DBI driver, the main goal of the DBD::ODBC
Perl Connect To Sql Server Database
module is to implement the functionality required by the DBI, not simply to give access to ODBC from Perl. The DBD::ODBC driver is described in more detail in Appendix B, "Driver and Database Characteristics ". 7.4.2. Win32::ODBC The Win32::ODBC module was written by Dave Roth, based on original code by Dan DeMaggio. It's a Perl extension written in C++ and is perl connect to sql server 2008 closely associated with the Win32 platform. The main goal of the Win32::ODBC module is to provide direct access to the ODBC functions. From that point of view, Win32::ODBC provides a fairly thin, low-level interface. Here's a sample of Win32::ODBC code: use Win32::ODBC; ### Connect to a data source $db = new Win32::ODBC("DSN=MyDataDSN;UID=me;PWD=secret") or die Win32::ODBC::Error(); ### Prepare and Execute a statement if ($db->Sql("SELECT item, price FROM table")) { print "SQL Error: " . $db->Error() . "\n"; $db->Close(); exit; } ### Fetch row from data source while ($db->FetchRow) { my ($item, $price) = $db->Data(); ### Get data values from the row print "Item $item = $price\n"; } ### Disconnect $db->Close(); The most significant disadvantages of Win32::ODBC compared to DBD::ODBC are: There is no separate statement handle The database connection handle is used to store the details of the current statement. There is no separate statement handle, so only one statement can execute per database handle. But that's not as bad as it may seem, because it's possible to clone database handles so that more than one handle can share the same
Published by O'Reilly Media, Inc. Programming the Perl DBI SPECIAL OFFER: Upgrade this ebook with O’Reilly A Note Regarding Supplemental Files Preface Resources Typographical Conventions How to Contact cpan dbd::odbc Us Code Examples Acknowledgments 1. Introduction From Mainframes to Workstations Perl DBI in
Perl Freetds
the Real World A Historical Interlude andStanding Stones 2. Basic Non-DBI Databases Storage Managers and Layers Query Languages and Data
Perl Dbi Sql Server Windows Authentication
Functions Standing Stones and the Sample Database Flat-File Databases Putting Complex Data into Flat Files Concurrent Database Access and Locking DBM Files and the BerkeleyDatabase Manager The MLDBM Module Summary 3. SQL http://docstore.mik.ua/orelly/linux/dbi/ch07_04.htm and Relational Databases The Relational Database Methodology Datatypes and NULL Values Querying Data Modifying Data Within Tables Creating and Destroying Tables 4. Programming with the DBI DBI Architecture Handles Data Source Names Connection and Disconnection Error Handling Utility Methods and Functions 5. Interacting with the Database Issuing Simple Queries Executing Non-SELECT Statements Binding Parameters to Statements Binding Output Columns do( ) Versus prepare( ) https://www.safaribooksonline.com/library/view/programming-the-perl/1565926994/ch04s05.html Atomic and Batch Fetching 6. Advanced DBI Handle Attributes and Metadata Handling LONG/LOB Data Transactions, Locking, and Isolation 7. ODBC and the DBI ODBC—Embraced and Extended DBI—Thrashed and Mutated The Nuts and Bolts of ODBC ODBC from Perl The Marriage of DBI and ODBC Questions and Choices Moving Between Win32::ODBC and the DBI And What About ADO? 8. DBI Shell and Database Proxying dbish—The DBI Shell Database Proxying A. DBI Specification Synopsis Description The DBI Class Methods Common to All Handles Attributes Common to All Handles DBI Database Handle Objects DBI Statement Handle Objects Further Information See Also Authors Copyright Acknowledgments Translations Support/ Warranty Training B. Driver and Database Characteristics Acquiring the DBI and Drivers DBD::ADO DBD::CSV DBD::DB2 DBD::Empress and DBD::EmpressNet DBD::Informix DBD::Ingres DBD::InterBase DBD::mysql and DBD::mSQL DBD::ODBC DBD::Oracle DBD::Pg DBD::SearchServer DBD::Sybase—For Sybase and Microsoft SQL Server DBD::XBase C. ASLaN Sacred Site Charter Index About the Authors Colophon SPECIAL OFFER: Upgrade this ebook with O’Reilly Error Handling The handling of errors within programs, or the lack thereof, is one of the more common causes of questions concerning programming with DBI. Someone will ask “Why doesn’t my program work?” and the answer g
here for a quick overview of the site Help Center Detailed answers to any questions you might http://stackoverflow.com/questions/8662670/handling-perl-critical-dbdodbc-errors-gracefully have Meta Discuss the workings and policies of this site About http://search.cpan.org/perldoc?DBD%3A%3AODBC Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million sql server programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Handling Perl critical DBD::ODBC errors gracefully up vote 2 down vote favorite I've got a simple Perl script that listens on a network port, accepts data and writes things to a databse using DBD::ODBC. It looks a little bit like perl connect to this: #!/usr/bin/perl my $dbh = DBI->connect('dbi:ODBC:SqlProd',"yay","ooo",{AutoCommit => 0}) || die "Couldn't connect to db"; my $sth = $dbh->prepare("insert into table some stuff"); $sock = IO::Socket::INET->new(LocalPort => '1234', Proto => 'udp')||die("Socket: $@"); do { $sock->recv($buf, $MAXLEN); /*parse some data here*/ /*bind some parameters to $sth here*/ my $rv = $sth->execute() || warn logit('warning', "Error inserting to db: $! $msg"); $dbh->commit() || warn logit('err',"Error committing db transaction: $! $msg"); }while(1); This, while being a little crude, works fairly well. However, for reasons unknown, the database goes down and the script crashes saying things like: DBD::ODBC::st execute failed: [unixODBC][FreeTDS][SQL Server]Write to the server failed (SQL-08S01) at /usr/local/bin/haproxy-syslog line 117. 0 at /usr/local/bin/haproxy-syslog line 117. DBD::ODBC::db commit failed: [unixODBC][FreeTDS][SQL Server]Could not perform COMMIT or ROLLBACK (SQL-HY000) at /usr/local/bin/haproxy-syslog line 118. Error committing db transaction: Connection reset by peer DBD::ODBC::db DESTROY failed: [unixODBC][FreeTDS][SQL Server]Could not perform COMMIT or ROLLBACK (SQL-HY000) during global destruction. If I wanted the script to be resiliant to this sort of failure, either by jus
this POD Website Related Modules Win32::ODBC DBD::Sybase DBD::Oracle Win32::OLE DBD::mysql DBD::ADO Data::Dumper DBD::CSV Class::DBI File::Copy more... By perlmonks.org CPAN RT New 3 Open 4 View/Report Bugs Module Version: 1.56 Source NAME VERSION WARNING SYNOPSIS DESCRIPTION Change log and FAQs Important note about the tests DBI attribute handling ReadOnly (boolean) Private attributes common to connection and statement handles odbc_ignore_named_placeholders odbc_default_bind_type odbc_force_bind_type odbc_force_rebind odbc_async_exec odbc_query_timeout odbc_putdata_start odbc_column_display_size odbc_utf8_on odbc_describe_parameters Private methods common to connection and statement handles odbc_getdiagrec odbc_getdiagfield Private connection attributes odbc_err_handler odbc_SQL_ROWSET_SIZE odbc_exec_direct odbc_SQL_DRIVER_ODBC_VER odbc_cursortype odbc_has_unicode odbc_out_connect_string odbc_version odbc_driver_complete odbc_batch_size odbc_array_operations odbc_taf_callback odbc_trace_file odbc_trace Private statement attributes odbc_more_results Private statement methods odbc_rows odbc_lob_read Private DBD::ODBC Functions GetInfo GetTypeInfo GetFunctions GetStatistics GetForeignKeys GetPrimaryKeys data_sources GetSpecialColumns ColAttributes DescribeCol Additional bind_col attributes DiscardString StrictlyTyped TreatAsLOB Tracing Deviations from the DBI specification last_insert_id Comments in SQL do Mixed placeholder types Using the same placeholder more than once Binding named placeholders Sticky Parameter Types disconnect and transactions execute_for_fetch and execute_array type_info_all Binding Columns bind_param tables and table_info Unicode Enabling and Disabling Unicode support Unicode - What is supported? Unicode - What is not supported? Unicode - Caveats Uni