NAME¶

DBD::mysql - MySQL driver for the Perl5 Database Interface (DBI)

SYNOPSIS¶

    use DBI;
    $dsn = "DBI:mysql:database=$database;host=$hostname;port=$port";
    $dbh = DBI->connect($dsn, $user, $password);
    $drh = DBI->install_driver("mysql");
    @databases = DBI->data_sources("mysql");
       or
    @databases = DBI->data_sources("mysql",
      {"host" => $host, "port" => $port, "user" => $user, password => $pass});
    $sth = $dbh->prepare("SELECT * FROM foo WHERE bla");
       or
    $sth = $dbh->prepare("LISTFIELDS $table");
       or
    $sth = $dbh->prepare("LISTINDEX $table $index");
    $sth->execute;
    $numRows = $sth->rows;
    $numFields = $sth->{'NUM_OF_FIELDS'};
    $sth->finish;
    $rc = $drh->func('createdb', $database, $host, $user, $password, 'admin');
    $rc = $drh->func('dropdb', $database, $host, $user, $password, 'admin');
    $rc = $drh->func('shutdown', $host, $user, $password, 'admin');
    $rc = $drh->func('reload', $host, $user, $password, 'admin');
    $rc = $dbh->func('createdb', $database, 'admin');
    $rc = $dbh->func('dropdb', $database, 'admin');
    $rc = $dbh->func('shutdown', 'admin');
    $rc = $dbh->func('reload', 'admin');

EXAMPLE¶

  #!/usr/bin/perl
  use strict;
  use DBI();
  # Connect to the database.
  my $dbh = DBI->connect("DBI:mysql:database=test;host=localhost",
                         "joe", "joe's password",
                         {'RaiseError' => 1});
  # Drop table 'foo'. This may fail, if 'foo' doesn't exist.
  # Thus we put an eval around it.
  eval { $dbh->do("DROP TABLE foo") };
  print "Dropping foo failed: $@\n" if $@;
  # Create a new table 'foo'. This must not fail, thus we don't
  # catch errors.
  $dbh->do("CREATE TABLE foo (id INTEGER, name VARCHAR(20))");
  # INSERT some data into 'foo'. We are using $dbh->quote() for
  # quoting the name.
  $dbh->do("INSERT INTO foo VALUES (1, " . $dbh->quote("Tim") . ")");
  # Same thing, but using placeholders
  $dbh->do("INSERT INTO foo VALUES (?, ?)", undef, 2, "Jochen");
  # Now retrieve data from the table.
  my $sth = $dbh->prepare("SELECT * FROM foo");
  $sth->execute();
  while (my $ref = $sth->fetchrow_hashref()) {
    print "Found a row: id = $ref->{'id'}, name = $ref->{'name'}\n";
  }
  $sth->finish();
  # Disconnect from the database.
  $dbh->disconnect();

DESCRIPTION¶

DBD::mysql is the Perl5 Database Interface driver for the MySQL database. In other words: DBD::mysql is an interface between the Perl programming language and the MySQL programming API that comes with the MySQL relational database management system. Most functions provided by this programming API are supported. Some rarely used functions are missing, mainly because noone ever requested them. :-)

In what follows we first discuss the use of DBD::mysql, because this is what you will need the most. For installation, see the sections on INSTALLATION, and "WIN32 INSTALLATION" below. See EXAMPLE for a simple example above.

From perl you activate the interface with the statement

    use DBI;

After that you can connect to multiple MySQL database servers and send multiple queries to any of them via a simple object oriented interface. Two types of objects are available: database handles and statement handles. Perl returns a database handle to the connect method like so:

  $dbh = DBI->connect("DBI:mysql:database=$db;host=$host",
                      $user, $password, {RaiseError => 1});

Once you have connected to a database, you can can execute SQL statements with:

  my $query = sprintf("INSERT INTO foo VALUES (%d, %s)",
                      $number, $dbh->quote("name"));
  $dbh->do($query);

See DBI(3) for details on the quote and do methods. An alternative approach is

  $dbh->do("INSERT INTO foo VALUES (?, ?)", undef,
           $number, $name);

in which case the quote method is executed automatically. See also the bind_param method in DBI(3). See "DATABASE HANDLES" below for more details on database handles.

If you want to retrieve results, you need to create a so-called statement handle with:

  $sth = $dbh->prepare("SELECT * FROM $table");
  $sth->execute();

This statement handle can be used for multiple things. First of all you can retreive a row of data:

  my $row = $sth->fetchrow_hashref();

If your table has columns ID and NAME, then $row will be hash ref with keys ID and NAME. See "STATEMENT HANDLES" below for more details on statement handles.

But now for a more formal approach:

DATABASE HANDLES¶

The DBD::mysql driver supports the following attributes of database handles (read only):

  $errno = $dbh->{'mysql_errno'};
  $error = $dbh->{'mysql_error'};
  $info = $dbh->{'mysql_hostinfo'};
  $info = $dbh->{'mysql_info'};
  $insertid = $dbh->{'mysql_insertid'};
  $info = $dbh->{'mysql_protoinfo'};
  $info = $dbh->{'mysql_serverinfo'};
  $info = $dbh->{'mysql_stat'};
  $threadId = $dbh->{'mysql_thread_id'};

These correspond to mysql_errno(), mysql_error(), mysql_get_host_info(), mysql_info(), mysql_insert_id(), mysql_get_proto_info(), mysql_get_server_info(), mysql_stat() and mysql_thread_id(), respectively.

 $info_hashref = $dhb->{mysql_dbd_stats}

DBD::mysql keeps track of some statistics in the mysql_dbd_stats attribute. The following stats are being maintained:

auto_reconnects_ok

The number of times that DBD::mysql successfully reconnected to the mysql server.

auto_reconnects_failed

The number of times that DBD::mysql tried to reconnect to mysql but failed.

The DBD::mysql driver also supports the following attribute(s) of database handles (read/write):

 $bool_value = $dbh->{mysql_auto_reconnect};
 $dbh->{mysql_auto_reconnect} = $AutoReconnect ? 1 : 0;

mysql_auto_reconnect

This attribute determines whether DBD::mysql will automatically reconnect to mysql if the connection be lost. This feature defaults to off; however, if either the GATEWAY_INTERFACE or MOD_PERL envionment variable is set, DBD::mysql will turn mysql_auto_reconnect on. Setting mysql_auto_reconnect to on is not advised if 'lock tables' is used because if DBD::mysql reconnect to mysql all table locks will be lost. This attribute is ignored when AutoCommit is turned off, and when AutoCommit is turned off, DBD::mysql will not automatically reconnect to the server.

It is also possible to set the default value of the "mysql_auto_reconnect" attribute for the $dbh by passing it in the "\%attr" hash for "DBI-"connect>.

Note that if you are using a module or framework that performs reconnections for you (for example DBIx::Connector in fixup mode), this value must be set to 0.

mysql_use_result

This attribute forces the driver to use mysql_use_result rather than mysql_store_result. The former is faster and less memory consuming, but tends to block other processes. (That's why mysql_store_result is the default.)

It is possible to set the default value of the "mysql_use_result" attribute for the $dbh using several ways:

 - through DSN
   $dbh= DBI->connect("DBI:mysql:test;mysql_use_result=1", "root", "");
 - after creation of database handle
   $dbh->{'mysql_use_result'}=0; #disable
   $dbh->{'mysql_use_result'}=1; #enable
    

It is possible to set/unset the "mysql_use_result" attribute after creation of the statement handle. See below.

mysql_enable_utf8

This attribute determines whether DBD::mysql should assume strings stored in the database are utf8. This feature defaults to off.

When set, a data retrieved from a textual column type (char, varchar, etc) will have the UTF-8 flag turned on if necessary. This enables character semantics on that string. You will also need to ensure that your database / table / column is configured to use UTF8. See Chapter 10 of the mysql manual for details.

Additionally, turning on this flag tells MySQL that incoming data should be treated as UTF-8. This will only take effect if used as part of the call to connect(). If you turn the flag on after connecting, you will need to issue the command "SET NAMES utf8" to get the same effect.

This option is experimental and may change in future versions.

mysql_bind_type_guessing

This attribute causes the driver (emulated prepare statements) to attempt to guess if a value being bound is a numeric value, and if so, doesn't quote the value. This was created by Dragonchild and is one way to deal with the performance issue of using quotes in a statement that is inserting or updating a large numeric value. This was previously called "unsafe_bind_type_guessing" because it is experimental. I have successfully run the full test suite with this option turned on, the name can now be simply "mysql_bind_type_guessing".

CAVEAT: Even though you can insert an integer value into a character column, if this column is indexed, if you query that column with the integer value not being quoted, it will not use the index:

MariaDB [test]> explain select * from test where value0 = '3' \G *************************** 1. row ***************************
id: 1
select_type: SIMPLE
table: test
type: ref possible_keys: value0
key: value0
key_len: 13
ref: const
rows: 1
Extra: Using index condition 1 row in set (0.00 sec)

MariaDB [test]> explain select * from test where value0 = 3
-> \G *************************** 1. row ***************************
id: 1
select_type: SIMPLE
table: test
type: ALL possible_keys: value0
key: NULL
key_len: NULL
ref: NULL
rows: 6
Extra: Using where 1 row in set (0.00 sec)

See bug: https://rt.cpan.org/Ticket/Display.html?id=43822

"mysql_bind_type_guessing" can be turned on via

 - through DSN
  my $dbh= DBI->connect('DBI:mysql:test', 'username', 'pass',
  { mysql_bind_type_guessing => 1})
  - OR after handle creation
  $dbh->{mysql_bind_type_guessing} = 1;
    

mysql_bind_comment_placeholders

This attribute causes the driver (emulated prepare statements) will cause any placeholders in comments to be bound. This is not correct prepared statement behavior, but some developers have come to depend on this behavior, so I have made it available in 4.015

mysql_no_autocommit_cmd

This attribute causes the driver to not issue 'set autocommit' either through explicit or using mysql_autocommit(). This is particularly useful in the case of using MySQL Proxy.

See the bug report:

https://rt.cpan.org/Public/Bug/Display.html?id=46308

"mysql_no_autocommit_cmd" can be turned on via

 - through DSN
  my $dbh= DBI->connect('DBI:mysql:test', 'username', 'pass',
  { mysql_no_autocommit_cmd => 1})
  - OR after handle creation
  $dbh->{mysql_no_autocommit_cmd} = 1;
    

STATEMENT HANDLES¶

The statement handles of DBD::mysql support a number of attributes. You access these by using, for example,

  my $numFields = $sth->{'NUM_OF_FIELDS'};

Note, that most attributes are valid only after a successfull execute. An "undef" value will returned in that case. The most important exception is the "mysql_use_result" attribute: This forces the driver to use mysql_use_result rather than mysql_store_result. The former is faster and less memory consuming, but tends to block other processes. (That's why mysql_store_result is the default.)

To set the "mysql_use_result" attribute, use either of the following:

  my $sth = $dbh->prepare("QUERY", { "mysql_use_result" => 1});

or

  my $sth = $dbh->prepare("QUERY");
  $sth->{"mysql_use_result"} = 1;

Column dependent attributes, for example NAME, the column names, are returned as a reference to an array. The array indices are corresponding to the indices of the arrays returned by fetchrow and similar methods. For example the following code will print a header of table names together with all rows:

  my $sth = $dbh->prepare("SELECT * FROM $table");
  if (!$sth) {
      die "Error:" . $dbh->errstr . "\n";
  }
  if (!$sth->execute) {
      die "Error:" . $sth->errstr . "\n";
  }
  my $names = $sth->{'NAME'};
  my $numFields = $sth->{'NUM_OF_FIELDS'};
  for (my $i = 0;  $i < $numFields;  $i++) {
      printf("%s%s", $i ? "," : "", $$names[$i]);
  }
  print "\n";
  while (my $ref = $sth->fetchrow_arrayref) {
      for (my $i = 0;  $i < $numFields;  $i++) {
          printf("%s%s", $i ? "," : "", $$ref[$i]);
      }
      print "\n";
  }

For portable applications you should restrict yourself to attributes with capitalized or mixed case names. Lower case attribute names are private to DBD::mysql. The attribute list includes:

ChopBlanks

this attribute determines whether a fetchrow will chop preceding and trailing blanks off the column values. Chopping blanks does not have impact on the max_length attribute.

mysql_insertid

MySQL has the ability to choose unique key values automatically. If this happened, the new ID will be stored in this attribute. An alternative way for accessing this attribute is via $dbh->{'mysql_insertid'}. (Note we are using the $dbh in this case!)

mysql_is_blob

Reference to an array of boolean values; TRUE indicates, that the respective column is a blob. This attribute is valid for MySQL only.

mysql_is_key

Reference to an array of boolean values; TRUE indicates, that the respective column is a key. This is valid for MySQL only.

mysql_is_num

Reference to an array of boolean values; TRUE indicates, that the respective column contains numeric values.

mysql_is_pri_key

Reference to an array of boolean values; TRUE indicates, that the respective column is a primary key.

mysql_is_auto_increment

Reference to an array of boolean values; TRUE indicates that the respective column is an AUTO_INCREMENT column. This is only valid for MySQL.

mysql_length

mysql_max_length

A reference to an array of maximum column sizes. The max_length is the maximum physically present in the result table, length gives the theoretically possible maximum. max_length is valid for MySQL only.

mysql_clientinfo

List information of the MySQL client library that DBD::mysql was built against:

print "$dbh->{mysql_clientinfo}\n";

5.2.0-MariaDB

mysql_clientversion

print "$dbh->{mysql_clientversion}\n";

50200

mysql_serverversion

print "$dbh->{mysql_serverversion}\n";

50200

NAME

A reference to an array of column names.

NULLABLE

A reference to an array of boolean values; TRUE indicates that this column may contain NULL's.

NUM_OF_FIELDS

Number of fields returned by a SELECT or LISTFIELDS statement. You may use this for checking whether a statement returned a result: A zero value indicates a non-SELECT statement like INSERT, DELETE or UPDATE.

mysql_table

A reference to an array of table names, useful in a JOIN result.

TYPE

A reference to an array of column types. The engine's native column types are mapped to portable types like DBI::SQL_INTEGER() or DBI::SQL_VARCHAR(), as good as possible. Not all native types have a meaningfull equivalent, for example DBD::mysql::FIELD_TYPE_INTERVAL is mapped to DBI::SQL_VARCHAR(). If you need the native column types, use mysql_type. See below.

mysql_type

A reference to an array of MySQL's native column types, for example DBD::mysql::FIELD_TYPE_SHORT() or DBD::mysql::FIELD_TYPE_STRING(). Use the TYPE attribute, if you want portable types like DBI::SQL_SMALLINT() or DBI::SQL_VARCHAR().

mysql_type_name

Similar to mysql, but type names and not numbers are returned. Whenever possible, the ANSI SQL name is preferred.

mysql_warning_count

The number of warnings generated during execution of the SQL statement.

TRANSACTION SUPPORT¶

Beginning with DBD::mysql 2.0416, transactions are supported. The transaction support works as follows:

• By default AutoCommit mode is on, following the DBI specifications.
• If you execute

      $dbh->{'AutoCommit'} = 0;
      

  or

      $dbh->{'AutoCommit'} = 1;
      

  then the driver will set the MySQL server variable autocommit to 0 or 1, respectively. Switching from 0 to 1 will also issue a COMMIT, following the DBI specifications.

• The methods

      $dbh->rollback();
      $dbh->commit();
      

  will issue the commands COMMIT and ROLLBACK, respectively. A ROLLBACK will also be issued if AutoCommit mode is off and the database handles DESTROY method is called. Again, this is following the DBI specifications.

Given the above, you should note the following:

• You should never change the server variable autocommit manually, unless you are ignoring DBI's transaction support.
• Switching AutoCommit mode from on to off or vice versa may fail. You should always check for errors, when changing AutoCommit mode. The suggested way of doing so is using the DBI flag RaiseError. If you don't like RaiseError, you have to use code like the following:

    $dbh->{'AutoCommit'} = 0;
    if ($dbh->{'AutoCommit'}) {
      # An error occurred!
    }
      

• If you detect an error while changing the AutoCommit mode, you should no longer use the database handle. In other words, you should disconnect and reconnect again, because the transaction mode is unpredictable. Alternatively you may verify the transaction mode by checking the value of the server variable autocommit. However, such behaviour isn't portable.
• DBD::mysql has a "reconnect" feature that handles the so-called MySQL "morning bug": If the server has disconnected, most probably due to a timeout, then by default the driver will reconnect and attempt to execute the same SQL statement again. However, this behaviour is disabled when AutoCommit is off: Otherwise the transaction state would be completely unpredictable after a reconnect.
• The "reconnect" feature of DBD::mysql can be toggled by using the mysql_auto_reconnect attribute. This behaviour should be turned off in code that uses LOCK TABLE because if the database server time out and DBD::mysql reconnect, table locks will be lost without any indication of such loss.

MULTIPLE RESULT SETS¶

As of version 3.0002_5, DBD::mysql supports multiple result sets (Thanks to Guy Harrison!). This is the first release of this functionality, so there may be issues. Please report bugs if you run into them!

The basic usage of multiple result sets is

  do
  {
    while (@row= $sth->fetchrow_array())
    {
      do stuff;
    }
  } while ($sth->more_results)

An example would be:

  $dbh->do("drop procedure if exists someproc") or print $DBI::errstr;
  $dbh->do("create procedure somproc() deterministic
   begin
   declare a,b,c,d int;
   set a=1;
   set b=2;
   set c=3;
   set d=4;
   select a, b, c, d;
   select d, c, b, a;
   select b, a, c, d;
   select c, b, d, a;
  end") or print $DBI::errstr;
  $sth=$dbh->prepare('call someproc()') ||
  die $DBI::err.": ".$DBI::errstr;
  $sth->execute || die DBI::err.": ".$DBI::errstr; $rowset=0;
  do {
    print "\nRowset ".++$i."\n---------------------------------------\n\n";
    foreach $colno (0..$sth->{NUM_OF_FIELDS}) {
      print $sth->{NAME}->[$colno]."\t";
    }
    print "\n";
    while (@row= $sth->fetchrow_array())  {
      foreach $field (0..$#row) {
        print $row[$field]."\t";
      }
      print "\n";
    }
  } until (!$sth->more_results)

For more examples, please see the eg/ directory. This is where helpful DBD::mysql code snippits will be added in the future.

MULTITHREADING¶

The multithreading capabilities of DBD::mysql depend completely on the underlying C libraries: The modules are working with handle data only, no global variables are accessed or (to the best of my knowledge) thread unsafe functions are called. Thus DBD::mysql is believed to be completely thread safe, if the C libraries are thread safe and you don't share handles among threads.

The obvious question is: Are the C libraries thread safe? In the case of MySQL the answer is "mostly" and, in theory, you should be able to get a "yes", if the C library is compiled for being thread safe (By default it isn't.) by passing the option -with-thread-safe-client to configure. See the section on How to make a threadsafe client in the manual.

ASYNCHRONOUS QUERIES¶

You can make a single asynchronous query per MySQL connection; this allows you to submit a long-running query to the server and have an event loop inform you when it's ready. An asynchronous query is started by either setting the 'async' attribute to a truthy value in the "do" in DBI method, or in the "prepare" in DBI method. Statements created with 'async' set to true in prepare always run their queries asynchronously when "execute" in DBI is called. The driver also offers three additional methods: "mysql_async_result", "mysql_async_ready", and "mysql_fd". "mysql_async_result" returns what do or execute would have; that is, the number of rows affected. "mysql_async_ready" returns true if "mysql_async_result" will not block, and zero otherwise. They both return "undef" if that handle is not currently running an asynchronous query. "mysql_fd" returns the file descriptor number for the MySQL connection; you can use this in an event loop.

Here's an example of how to use the asynchronous query interface:

  use feature 'say';
  $dbh->do('SELECT SLEEP(10)', { async => 1 });
  until($dbh->mysql_async_ready) {
    say 'not ready yet!';
    sleep 1;
  }
  my $rows = $dbh->mysql_async_result;

INSTALLATION¶

Windows users may skip this section and pass over to WIN32 INSTALLATION below. Others, go on reading.

    export DBD_MYSQL_CFLAGS=-I/usr/local/mysql/include/mysql
    export DBD_MYSQL_LIBS="-L/usr/local/mysql/lib/mysql -lmysqlclient"
    export DBD_MYSQL_EMBEDDED=
    export DBD_MYSQL_CONFIG=mysql_config
    export DBD_MYSQL_NOCATCHSTDERR=0
    export DBD_MYSQL_NOFOUNDROWS=0
    export DBD_MYSQL_SSL=
    export DBD_MYSQL_TESTDB=test
    export DBD_MYSQL_TESTHOST=localhost
    export DBD_MYSQL_TESTPASSWORD=s3kr1+
    export DBD_MYSQL_TESTPORT=3306
    export DBD_MYSQL_TESTUSER=me

  perl -MCPAN -e shell

  install Bundle::DBD::mysql

   http://search.cpan.org/

  DBI
  Data::ShowTable
  DBD::mysql

  gzip -cd DBI-(version).tar.gz | tar xf -
  cd DBI-(version)
  perl Makefile.PL
  make
  make test
  make install
  cd ..
  gzip -cd Data-ShowTable-(version).tar.gz | tar xf -
  cd Data-ShowTable-3.3
  perl Makefile.PL
  make
  make install
  cd ..
  gzip -cd DBD-mysql-(version)-tar.gz | tar xf -
  cd DBD-mysql-(version)
  perl Makefile.PL
  make
  make test
  make install

WIN32 INSTALLATION¶

If you are using ActivePerl, you may use ppm to install DBD-mysql. For Perl 5.6, upgrade to Build 623 or later, then it is sufficient to run

  ppm install DBI
  ppm install DBD::mysql

If you need an HTTP proxy, you might need to set the environment variable http_proxy, for example like this:

  set http_proxy=http://myproxy.com:8080/

As of this writing, DBD::mysql is missing in the ActivePerl 5.8.0 repository. However, Randy Kobes has kindly donated an own distribution and the following might succeed:

  ppm install http://theoryx5.uwinnipeg.ca/ppms/DBD-mysql.ppd

Otherwise you definitely *need* a C compiler. And it *must* be the same compiler that was being used for compiling Perl itself. If you don't have a C compiler, the file README.win32 from the Perl source distribution tells you where to obtain freely distributable C compilers like egcs or gcc. The Perl sources are available via CPAN search

  http://search.cpan.org

I recommend using the win32clients package for installing DBD::mysql under Win32, available for download on www.tcx.se. The following steps have been required for me:

• The current Perl versions (5.6, as of this writing) do have a problem with detecting the C libraries. I recommend to apply the following patch:

    *** c:\Perl\lib\ExtUtils\Liblist.pm.orig Sat Apr 15 20:03:40 2000
    --- c:\Perl\lib\ExtUtils\Liblist.pm      Sat Apr 15 20:03:45 2000
    ***************
    *** 230,235 ****
    --- 230,239 ----
        # add "$Config{installarchlib}/CORE" to default search path
        push @libpath, "$Config{installarchlib}/CORE";
    +     if ($VC  and  exists($ENV{LIB})  and  defined($ENV{LIB})) {
    +       push(@libpath, split(/;/, $ENV{LIB}));
    +     }
    +
        foreach (Text::ParseWords::quotewords('\s+', 0, $potential_libs)){
          $thislib = $_;
      

• Extract sources into C:\. This will create a directory C:\mysql with subdirectories include and lib.

  IMPORTANT: Make sure this subdirectory is not shared by other TCX files! In particular do *not* store the MySQL server in the same directory. If the server is already installed in C:\mysql, choose a location like C:\tmp, extract the win32clients there. Note that you can remove this directory entirely once you have installed DBD::mysql.

• Extract the DBD::mysql sources into another directory, for example C:\src\siteperl
• Open a DOS shell and change directory to C:\src\siteperl.
• The next step is only required if you repeat building the modules: Make sure that you have a clean build tree by running

    nmake realclean
      

  If you don't have VC++, replace nmake with your flavour of make. If error messages are reported in this step, you may safely ignore them.

• Run

    perl Makefile.PL
      

  which will prompt you for some settings. The really important ones are:

    Which DBMS do you want to use?
      

  enter a 1 here (MySQL only), and

    Where is your mysql installed? Please tell me the directory that
    contains the subdir include.
      

  where you have to enter the win32clients directory, for example C:\mysql or C:\tmp\mysql.

• Continued in the usual way:

    nmake
    nmake install
      

If you want to create a PPM package for the ActiveState Perl version, then modify the above steps as follows: Run

  perl Makefile.PL NAME=DBD-mysql BINARY_LOCATION=DBD-mysql.tar.gz
  nmake ppd
  nmake

Once that is done, use tar and gzip (for example those from the CygWin32 distribution) to create an archive:

  mkdir x86
  tar cf x86/DBD-mysql.tar blib
  gzip x86/DBD-mysql.tar

Put the files x86/DBD-mysql.tar.gz and DBD-mysql.ppd onto some WWW server and install them by typing

  install http://your.server.name/your/directory/DBD-mysql.ppd

in the PPM program.

AUTHORS¶

Originally, there was a non-DBI driver, Mysql, which was much like PHP drivers such as mysql and mysqli. The Mysql module was originally written by Andreas KieXXnig <koenig@kulturbox.de> who still, to this day, contributes patches to DBD::mysql. An emulated version of Mysql was provided to DBD::mysql from Jochen Wiedmann, but eventually deprecated as it was another bundle of code to maintain.

The first incarnation of DBD::mysql was developed by Alligator Descartes, who was also aided and abetted by Gary Shea, Andreas KieXXnig and Tim Bunce.

The current incarnation of DBD::mysql was written by Jochen Wiedmann, then numerous changes and bug-fixes were added by Rudy Lippan. Next, prepared statement support was added by Patrick Galbraith and Alexy Stroganov (who also soley added embedded server support).

For the past seven years DBD::mysql has been maintained by Patrick Galbraith (patg@patg.net) along with the entire community of Perl developers who keep sending patches and making Patrick's job easier.

CONTRIBUTIONS¶

Anyone who desires to contribute to this project is encouraged to do so. Currently, the sourcecode for this project can be found at Github:

git://github.com/CaptTofu/DBD-mysql.git

Either fork this repository and produce a branch with your changeset that the maintainer can merge to his tree, or create a diff with git. The maintainer is more than glad to take contributions from the community as many features and fixes from DBD::mysql have come from the community.

COPYRIGHT¶

This module is Large Portions Copyright (c) 2004-2010 Patrick Galbraith Large Portions Copyright (c) 2004-2006 Alexey Stroganov Large Portions Copyright (c) 2003-2005 Rudolf Lippan Large Portions Copyright (c) 1997-2003 Jochen Wiedmann, with code portions Copyright (c)1994-1997 their original authors This module is released under the same license as Perl itself. See the Perl README for details.

MAILING LIST SUPPORT¶

This module is maintained and supported on a mailing list, dbi-users.

To subscribe to this list, send and email to

dbi-users-subscribe@perl.org

Mailing list archives are at

http://groups.google.com/group/perl.dbi.users?hl=en&lr=

Also, the main DBI site is at

http://dbi.perl.org/

And source:

git://github.com/CaptTofu/DBD-mysql.git

ADDITIONAL DBI INFORMATION¶

Additional information on the DBI project can be found on the World Wide Web at the following URL:

    http://dbi.perl.org

where documentation, pointers to the mailing lists and mailing list archives and pointers to the most current versions of the modules can be used.

Information on the DBI interface itself can be gained by typing:

    perldoc DBI

Information on the DBD::mysql specifically can be gained by typing:

    perldoc DBD::mysql

BUG REPORTING, ENHANCEMENT/FEATURE REQUESTS¶

Please report bugs, including all the information needed such as DBD::mysql version, MySQL version, OS type/version, etc to this link:

http://rt.cpan.org

Note: until recently, MySQL/Sun/Oracle responded to bugs and assisted in fixing bugs which many thanks should be given for their help! This driver is outside the realm of the numerous components they support, and the maintainer and community solely support DBD::mysql

POD ERRORS¶

Hey! The above document had some coding errors, which are explained below:

Around line 1315:

'=item' outside of any '=over'

Around line 1464:

You forgot a '=back' before '=head1'

Around line 1727:

You forgot a '=back' before '=head1'

Around line 2070:

Non-ASCII character seen before =encoding in 'KieXXnig'. Assuming UTF-8