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<title>DBI - Database independent interface for Perl</title>
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<h1><a>DBI - Database independent interface for Perl</a></h1>
<p><a name="__index__"></a></p>
<!-- INDEX BEGIN -->
<ul>
<li><a href="#name">NAME</a></li>
<li><a href="#synopsis">SYNOPSIS</a></li>
<ul>
<li><a href="#getting_help">GETTING HELP</a></li>
<li><a href="#notes">NOTES</a></li>
</ul>
<li><a href="#description">DESCRIPTION</a></li>
<ul>
<li><a href="#architecture_of_a_dbi_application">Architecture of a DBI Application</a></li>
<li><a href="#notation_and_conventions">Notation and Conventions</a></li>
<li><a href="#outline_usage">Outline Usage</a></li>
<li><a href="#general_interface_rules___caveats">General Interface Rules & Caveats</a></li>
<li><a href="#naming_conventions_and_name_space">Naming Conventions and Name Space</a></li>
<li><a href="#sql__a_query_language">SQL - A Query Language</a></li>
<li><a href="#placeholders_and_bind_values">Placeholders and Bind Values</a></li>
</ul>
<li><a href="#the_dbi_package_and_class">THE DBI PACKAGE AND CLASS</a></li>
<ul>
<li><a href="#dbi_constants">DBI Constants</a></li>
<li><a href="#dbi_class_methods">DBI Class Methods</a></li>
<li><a href="#dbi_utility_functions">DBI Utility Functions</a></li>
<li><a href="#dbi_dynamic_attributes">DBI Dynamic Attributes</a></li>
</ul>
<li><a href="#methods_common_to_all_handles">METHODS COMMON TO ALL HANDLES</a></li>
<li><a href="#attributes_common_to_all_handles">ATTRIBUTES COMMON TO ALL HANDLES</a></li>
<li><a href="#dbi_database_handle_objects">DBI DATABASE HANDLE OBJECTS</a></li>
<ul>
<li><a href="#database_handle_methods">Database Handle Methods</a></li>
<li><a href="#database_handle_attributes">Database Handle Attributes</a></li>
</ul>
<li><a href="#dbi_statement_handle_objects">DBI STATEMENT HANDLE OBJECTS</a></li>
<ul>
<li><a href="#statement_handle_methods">Statement Handle Methods</a></li>
<li><a href="#statement_handle_attributes">Statement Handle Attributes</a></li>
</ul>
<li><a href="#other_methods">OTHER METHODS</a></li>
<li><a href="#further_information">FURTHER INFORMATION</a></li>
<ul>
<li><a href="#catalog_methods">Catalog Methods</a></li>
<li><a href="#transactions">Transactions</a></li>
<li><a href="#handling_blob___long___memo_fields">Handling BLOB / LONG / Memo Fields</a></li>
<li><a href="#simple_examples">Simple Examples</a></li>
<li><a href="#threads_and_thread_safety">Threads and Thread Safety</a></li>
<li><a href="#signal_handling_and_canceling_operations">Signal Handling and Canceling Operations</a></li>
<li><a href="#subclassing_the_dbi">Subclassing the DBI</a></li>
</ul>
<li><a href="#tracing">TRACING</a></li>
<ul>
<li><a href="#trace_settings">Trace Settings</a></li>
<li><a href="#trace_levels">Trace Levels</a></li>
<li><a href="#trace_flags">Trace Flags</a></li>
<li><a href="#enabling_trace">Enabling Trace</a></li>
<li><a href="#trace_output">Trace Output</a></li>
<li><a href="#trace_content">Trace Content</a></li>
<li><a href="#tracing_tips">Tracing Tips</a></li>
</ul>
<li><a href="#dbi_environment_variables">DBI ENVIRONMENT VARIABLES</a></li>
<ul>
<li><a href="#dbi_dsn">DBI_DSN</a></li>
<li><a href="#dbi_driver">DBI_DRIVER</a></li>
<li><a href="#dbi_autoproxy">DBI_AUTOPROXY</a></li>
<li><a href="#dbi_user">DBI_USER</a></li>
<li><a href="#dbi_pass">DBI_PASS</a></li>
<li><a href="#dbi_dbname__obsolete_">DBI_DBNAME (obsolete)</a></li>
<li><a href="#dbi_trace">DBI_TRACE</a></li>
<li><a href="#perl_dbi_debug__obsolete_">PERL_DBI_DEBUG (obsolete)</a></li>
<li><a href="#dbi_profile">DBI_PROFILE</a></li>
<li><a href="#dbi_pureperl">DBI_PUREPERL</a></li>
</ul>
<li><a href="#warning_and_error_messages">WARNING AND ERROR MESSAGES</a></li>
<ul>
<li><a href="#fatal_errors">Fatal Errors</a></li>
</ul>
<li><a href="#pureperl_dbi">Pure-Perl DBI</a></li>
<li><a href="#see_also">SEE ALSO</a></li>
<ul>
<li><a href="#driver_and_database_documentation">Driver and Database Documentation</a></li>
<li><a href="#odbc_and_sql_cli_standards_reference_information">ODBC and SQL/CLI Standards Reference Information</a></li>
<li><a href="#standards_reference_information">Standards Reference Information</a></li>
<li><a href="#books_and_articles">Books and Articles</a></li>
<li><a href="#perl_modules">Perl Modules</a></li>
<li><a href="#mailing_list">Mailing List</a></li>
<li><a href="#assorted_related_www_links">Assorted Related WWW Links</a></li>
<li><a href="#faq">FAQ</a></li>
</ul>
<li><a href="#authors">AUTHORS</a></li>
<li><a href="#copyright">COPYRIGHT</a></li>
<li><a href="#support___warranty">SUPPORT / WARRANTY</a></li>
<ul>
<li><a href="#support">Support</a></li>
<li><a href="#sponsor_enhancements">Sponsor Enhancements</a></li>
</ul>
<li><a href="#acknowledgements">ACKNOWLEDGEMENTS</a></li>
<li><a href="#contributing">CONTRIBUTING</a></li>
<ul>
<li><a href="#browsing_the_source_code_repository">Browsing the source code repository</a></li>
<li><a href="#how_to_create_a_patch_using_subversion">How to create a patch using Subversion</a></li>
<li><a href="#how_to_create_a_patch_without_subversion">How to create a patch without Subversion</a></li>
<li><a href="#speak_before_you_patch">Speak before you patch</a></li>
</ul>
<li><a href="#translations">TRANSLATIONS</a></li>
<li><a href="#training">TRAINING</a></li>
<li><a href="#frequently_asked_questions">FREQUENTLY ASKED QUESTIONS</a></li>
<ul>
<li><a href="#why_doesn_t_my_cgi_script_work_right">Why doesn't my CGI script work right?</a></li>
<li><a href="#how_can_i_maintain_a_www_connection_to_a_database">How can I maintain a WWW connection to a database?</a></li>
</ul>
<li><a href="#other_related_work_and_perl_modules">OTHER RELATED WORK AND PERL MODULES</a></li>
</ul>
<!-- INDEX END -->
<hr />
<p>
</p>
<h1><a name="name">NAME</a></h1>
<p>DBI - Database independent interface for Perl</p>
<p>
</p>
<hr />
<h1><a name="synopsis">SYNOPSIS</a></h1>
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