John Smirnios > DBD-SQLAnywhere-2.08 > DBD::SQLAnywhere

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Module Version: 2.08   Source  

NAME ^

DBD::SQLAnywhere - SQLAnywhere database driver for DBI

SYNOPSIS ^

  use DBI;

  $dbh = DBI->connect( "dbi:SQLAnywhere:ENG=demo;UID=$userid;PWD=$passwd", '', '' );

  $dbh = DBI->connect( 'dbi:SQLAnywhere:ENG=demo', $userid, $passwd );

  # Use 'perldoc DBI' for detailed information about DBI.

DESCRIPTION ^

DBD::SQLAnywhere is a Perl database driver (DBD) module that works with the DBI module to provide access to Sybase SQL Anywhere databases.

Connecting to SQL Anywhere

If you are not already familiar with SQL Anywhere connection parameters, please refer to the SQL Anywhere documentation.

SQL Anywhere connection parameters can be passed to DBD::SQLAnywhere by placing the list of parameters after 'dbi:SQLAnywhere:' in the first parameter to connect(). The connection parameters are specified as a list of LABEL=value pairs that are delimited by semicolons.

Example:

    $dbh = DBI->connect( 'dbi:SQLAnywhere:ENG=demo;UID=dba;PWD=sql', '', '' );

If the second argument to connect() is nonblank, it is assumed to be a user name and UID=argument2 will be appended to the SQL Anywhere connection string.

Similarly, if the third argument is nonblank, it is assumed to be a password and PWD=argument3 will be appended to the SQL Anywhere connection string.

The following is equivalent to the example above:

    $dbh = DBI->connect( 'dbi:SQLAnywhere:ENG=demo', 'dba', 'sql' );

Prepared Statement and Cursor Limits

To help detect handle leaks in client applications, SQL Anywhere defaults to limiting the number of prepared statements and open cursors that any connection can hold at one time to 50 of each. If that limit is exceeded, a "Resource governor ... exceeded" error is reported. If you encounter this error, make sure you are dropping all of your statement handles and, if so, consult the SQL Anywhere documentation for the MAX_CURSOR_COUNT and MAX_STATEMENT_COUNT options.

Note that prepared statements are not dropped from the SQL Anywhere server until the statement handle is destroyed in the perl script. Calling finish() is not sufficient to drop the handle that the server is holding onto: use "undef" instead or reuse the same perl variable for another handle.

Be careful when using prepare_cached() since the cache will hold onto statement handles.

REQUIREMENTS ^

As of version 2.0, DBD::SQLAnywhere can be built (but not used) without SQL Anywhere installed. To use DBD::SQLAnywhere, an installation of the SQL Anywhere client software is required and must include the "dbcapi" component (dbcapi.dll on Windows and libdbcapi.so/libdbcapi_r.so on UNIX). Dbcapi is included in the client installation of SQL Anywhere 11.0.0 and later. To use SQL Anywhere version 10.0.0 or 10.0.1 with this DBD driver, download and install a current EBF for your version of SQL Anywhere from www.sybase.com.

DEPENDENCIES ^

DBI

Test::Simple

AUTHOR ^

John Smirnios (smirnios@sybase.com).

Based on a driver written by Tim Bunce.

COPYRIGHT ^

Portions Copyright (c) 1994,1995,1996 Tim Bunce Portions Copyright (c) 1996-2010 iAnywhere Solutions, Inc.

For license information, please see license.txt included in this distribution.

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