Free odbc software for linux

DBD::ODBC Perl module contains a ODBC Driver for DBI.

SYNOPSIS

use DBI;

$dbh = DBI->connect(dbi:ODBC:DSN, user, password);

Private DBD::ODBC Attributes

odbc_more_results (applies to statement handle only!)
Use this attribute to determine if there are more result sets available. SQL Server supports this feature. Use this as follows:

do { my @row; while (@row = $sth->fetchrow_array()) { # do stuff here } } while ($sth->{odbc_more_results});

Note that with multiple result sets and output parameters (i.e. using bind_param_inout, dont expect output parameters to be bound until ALL result sets have been retrieved.
odbc_ignore_named_placeholders

Use this if you have special needs (such as Oracle triggers, etc) where :new or :name mean something special and are not just place holder names You must then use ? for binding parameters. Example: $dbh->{odbc_ignore_named_placeholders} = 1; $dbh->do("create trigger foo as if :new.x :old.x then ... etc");

Without this, DBD::ODBC will think :new and :old are placeholders for binding and get confused.

odbc_default_bind_type

This value defaults to 0. Older versions of DBD::ODBC assumed that the binding type was 12 (SQL_VARCHAR). Newer versions default to 0, which means that DBD::ODBC will attempt to query the driver via SQLDescribeParam to determine the correct type. If the driver doesnt support SQLDescribeParam, then DBD::ODBC falls back to using SQL_VARCHAR as the default, unless overridden by bind_param()

odbc_force_rebind

This is to handle special cases, especially when using multiple result sets. Set this before execute to "force" DBD::ODBC to re-obtain the result sets number of columns and column types for each execute. Especially useful for calling stored procedures which may return different result sets each execute. The only performance penalty is during execute(), but I didnt want to incur that penalty for all circumstances. It is probably fairly rare that this occurs. This attribute will be automatically set when multiple result sets are triggered. Most people shouldnt have to worry about this.

odbc_async_exec

Allow asynchronous execution of queries. Right now, this causes a spin-loop (with a small "sleep") until the SQL is complete. This is useful, however, if you want the error handling and asynchronous messages (see the err_handler) below. See t/20SQLServer.t for an example of this.

odbc_exec_direct

Force DBD::ODBC to use SQLExecDirect instead of SQLPrepare() then SQLExecute. There are drivers that only support SQLExecDirect and the DBD::ODBC do() override doesnt allow returning result sets. Therefore, the way to do this now is to set the attributed odbc_exec_direct. There are currently two ways to get this: $dbh->prepare($sql, { odbc_exec_direct => 1}); and $dbh->{odbc_exec_direct} = 1; When $dbh->prepare() is called with the attribute "ExecDirect" set to a non-zero value dbd_st_prepare do NOT call SQLPrepare, but set the sth flag odbc_exec_direct to 1.

odbc_err_handler

Allow errors to be handled by the application. A call-back function supplied by the application to handle or ignore messages. If the error handler returns 0, the error is ignored, otherwise the error is passed through the normal DBI error handling structure(s).

This can also be used for procedures under MS SQL Server (Sybase too, probably) to obtain messages from system procedures such as DBCC. Check t/20SQLServer.t and mytest/testerrhandler.pl

The callback function takes three parameters: the SQLState, the ErrorMessage and the native server error.

odbc_SQL_ROWSET_SIZE

Here is the information from the original patch, however, Ive learned since from other sources that this could/has caused SQL Server to "lock up". Please use at your own risk!
SQL_ROWSET_SIZE attribute patch from Andrew Brown > There are only 2 additional lines allowing for the setting of > SQL_ROWSET_SIZE as db handle option. > > The purpose to my madness is simple. SqlServer (7 anyway) by default > supports only one select statement at once (using std ODBC cursors). > According to the SqlServer documentation you can alter the default setting > of > three values to force the use of server cursors - in which case multiple > selects are possible. > > The code change allows for: > $dbh->{SQL_ROWSET_SIZE} = 2; # Any value > 1 > > For this very purpose. > > The setting of SQL_ROWSET_SIZE only affects the extended fetch command as > far as I can work out and thus setting this option shouldnt affect > DBD::ODBC operations directly in any way. > > Andrew >

SQL_DRIVER_ODBC_VER

This, while available via get_info() is captured here. I may get rid of this as I only used it for debugging purposes.
odbc_cursortype (applies to connect only!)

This allows multiple concurrent statements on SQL*Server. In your connect, add { odbc_cursortype => 2 }. If you are using DBI > 1.41, you should also be able to use { odbc_cursortype => DBI::SQL_CURSOR_DYNAMIC } instead. For example:

my $dbh = DBI->connect("dbi:ODBC:$DSN", $user, $pass, { RaiseError => 1, odbc_cursortype => 2});
my $sth = $dbh->prepare("one statement");
my $sth2 = $dbh->prepare("two statement");
$sth->execute;
my @row;
while (@row = $sth->fetchrow_array) {
$sth2->execute($row[0]);
}

See t/20SqlServer.t for an example.

odbc_query_timeout

This allows the end user to set a timeout for queries on the ODBC side. After your connect, add { odbc_query_timeout => 30 } or set on the dbh before executing the statement. The default is 0, no timeout. Note that some drivers may not support this attribute.

See t/20SqlServer.t for an example.

odbc_has_unicode (applies to database handle only)
A read-only attribute signifying whether DBD::ODBC was built with the C macro WITH_UNICODE or not. A value of 1 indicates DBD::ODBC was built with WITH_UNICODE else the value returned is 0.

Building WITH_UNICODE affects columns and parameters which are SQL_C_WCHAR, SQL_WCHAR, SQL_WVARCHAR, and SQL_WLONGVARCHAR.

When odbc_has_unicode is 1, DBD::ODBC will:

bind columns the database declares as wide characters as SQL_Wxxx

This means that UNICODE data stored in these columns will be returned to Perl in UTF-8 and with the UTF8 flag set.
bind parameters the database declares as wide characters as SQL_Wxxx

Parameters bound where the database declares the parameter as being a wide character (or where the parameter type is explicitly set to a wide type - SQL_Wxxx) can be UTF8 in Perl and will be mapped to UTF16 before passing to the driver.
NOTE: You will need at least Perl 5.8.1 to use UNICODE with DBD::ODBC.

NOTE: At this time SQL statements are still treated as native encoding i.e. DBD::ODBC does not call SQLPrepareW with UNICODE strings. If you need a unicode constant in an SQL statement, you have to pass it as parameter or use SQL functions to convert your constant from native encoding to Unicode.

NOTE: Binding of unicode output parameters is coded but untested.

NOTE: When building DBD::ODBC on Windows ($^O eq MSWin32) the WITH_UNICODE macro is automatically added. To disable specify -nou as an argument to Makefile.PL (e.g. nmake Makefile.PL -nou). On non-Windows platforms the WITH_UNICODE macro is not enabled by default and to enable you need to specify the -u argument to Makefile.PL. Please bare in mind that some ODBC drivers do not support SQL_Wxxx columns or parameters.

UNICODE support in ODBC Drivers differs considerably. Please read the README.unicode file for further details.

odbc_version (applies to connect only!)

This was added prior to the move to ODBC 3.x to allow the caller to "force" ODBC 3.0 compatibility. Its probably not as useful now, but it allowed get_info and get_type_info to return correct/updated information that ODBC 2.x didnt permit/provide. Since DBD::ODBC is now 3.x, this can be used to force 2.x behavior via something like: my $dbh = DBI->connect("dbi:ODBC:$DSN", $user, $pass, { odbc_version => 2});

The unixODBC Project goals are to develop and promote unixODBC to be the definitive standard for ODBC on non MS Windows platforms. This is to include GUI support for both KDE and GNOME.
ODBC is an open specification for providing application developers with a predictable API with which to access Data Sources. Data Sources include SQL Servers and any Data Source with an ODBC Driver.
The two major advantages of choosing to code an application to the ODBC API are;
Portable Data Access Code
The ODBC API, as outlined by X/Open and ISO, is availible on all major platforms. Microsoft platforms include many enhancements to this specification; these enhancements are also supported by unixODBC
Dynamic Data Binding
This allows the user or the system administrator to easily configure an application to use any ODBC compliant data source. This is perhaps the single biggest advantage of coding an application to the ODBC API and to purchase these applications.
Dyamic binding allows the end-user to pick a data source, ie an SQL Server, and use it for all data applications without having to worry about recompiling the application.
The unixODBC team has reached this objective by providing the best technical solution to ODBC demands on the Linux platform. Also; ALL unixODBC development is and will be distributed under GPL or LGPL. The LGPL on libs will ensure that commercial solutions will be able to utilize unixODBC.
Enhancements:
- Fix a couple of typo errors in postgres driver and odbctest
- Fix problem where ini files could be truncated under heavy load
- Fix potential hang with FILEDSNs if the connect string included a DSN= entry as well
- Dont save the SAVEFILE attribute in the filedsn.
- Fixed bug that prevented the setting of some attributes via the DMConnAttr method
- Removed the -module entry from the cursor lib, it prevents it building on HPUX.
- Add a couple of extra info types to the pull down in odbctest
- SQLGetInfoW was returning the wrong length when converting from the ANSI call. The same was also going on the other way. Also fixed same thing for other calls.
- Fix incorrect value in SQLFetchScroll in odbctest
- Fix memory leak in odbcinstQ
- Check for MOC being found, before building GUI parts
- Add list of export symbols to libodbcinst
- Fix a problem in the cursor lib returning blobs
- SQL_DIAG_NUMBER was being stored and returned as a SQLINTEGER instead of a SQLRETURN
- Check if we can include sys/stats.h in iniOpen.c
- Fix potential buffer overun in SQLConfigDataSource()
- Fix problem in odbctest that prevented intervals from being displayed.
- Cope with SHLIBEXT not being set when finding the cursor lib
- Add a couple of missing Setup64 checks
- Small change in __info to conserve memory
- Add odbcinst.exp to distrib
- Add missing ODBC2 installer stubs
- Fix typo in SQLStatistics
- Not passing user names and password into isql passes NULLS not empty strings into SQLConnect
- Add missing SQLPrepareA from the driver manager export file
- Make the default for DontDLClose 1, it doesnt do any harm, and fixes some segfaults
- Fix printf format in the postgres driver on 64 platforms

MySQL Connector/ODBC project is an ODBC driver for the MySQL database server.
MySQL is a multithreaded, multi-user SQL database management system (DBMS) which has, according to MySQL AB, more than 10 million installations.
MySQL is owned and sponsored by a single for-profit firm, the Swedish company MySQL AB, which holds the copyright to most of the codebase.
This is similar to the JBoss model and how the Free Software Foundation handles copyright in its projects, and dissimilar to how the Apache project does it, where the software is developed by a public community and the copyright to the codebase is owned by its individual authors.
Enhancements:
- This release fixes a regression in the handling of character data from the server when the server misidentifies it as binary data. (The driver contains a workaround for this server bug that was inadvertantly removed.)

Simple C++ ODBC Database API is designed to encapsulate the ODBC API functionality in an object oriented manner.
The API was created due to an absence of any other such API that was database independent. The database independence is achieved using the ODBC (Open DataBase Connectivity) API.
The API provides a Database object that can be used to create instances of Query objects. The Query objects are used to query a database and allow columns to be bound for the query.
The flowing column objects are currently available (as of Jan 2005): a boolean column, a long column and a string column. The string column makes use of the libstdc++ string class so you dont have to mess around with malloc.
The Database object also has some convenience member functions that allow queries that return a single integer or string to be executed without having to create a query object or bind columns.
The API has been tested to work with both MySql and PostGreSQL on a Debian Linux platform.
Enhancements:
- DoubleColumn, IntColumn, and BigintColumn were added.
- The LongColumn is deprecated.

Need a Type 3 JDBC Driver for MS Access or SQL Server? Think RmiJdbc!
RmiJdbc project is a client/server JDBC Driver that relies on Java RMI.
All JDBC classes (like Connection, ResultSet, etc...) are distributed as RMI objects, so that you can distribute as you like the access to any database supporting the JDBC API.
In fact, RmiJdbc is just a bridge to allow remote access to JDBC drivers.
Why RmiJdbc?
- You develop a client/server application with databases on Windows (NT)? Use RmiJdbc along with the JDBC/ODBC Bridge, your Windows (NT) databases become remotely accessible in Java.
- You implement a JDBC Driver? Just implement the JDBC classes locally, dont bother with remote access!
- You need serializable JDBC classes? Here they are.
Enhancements:
- Add features/limitations/changes here

HDBC is a Haskell Database Connectivity.

HDBC provides an abstraction layer between Haskell programs and SQL relational databases. This lets you write database code once, in Haskell, and have it work with any number of backend SQL databases (MySQL, Oracle, PostgreSQL, ODBC-compliant databases, etc.)

HDBC is modeled loosely on Perls DBI interface http://search.cpan.org/~timb/DBI/DBI.pm, though it has also been influenced by Pythons DB-API v2, JDBC in Java, and HSQL in Haskell.

HDBC is a from-scratch effort. It is not a reimplementation of HSQL, though its purpose is the same.