NAME

MySQL::Partition - Utility for MySQL partitioning

SYNOPSIS

use MySQL::Partition;
my $dbh = DBI->connect(@connect_info);
my $list_partition = MySQL::Partition->new(
    dbh        => $dbh,
    type       => 'list',
    table      => 'test',
    expression => 'event_id',
);
$list_partition->is_partitioned;
$list_partition->create_partitions('p1' => 1); # ALTER TABLE test PARTITION BY LIST ...
$list_partition->has_partition('p1'); # true

$list_partition->add_partitions('p2_3' => '2, 3');

# handle interface
my $handle = $list_partition->prepare_add_partitions('p4' => 4);
print $handle->statement;
$handle->execute;

$list_partition->truncate_partitions('p1');
$handle = $list_partition->prepare_truncate_partitions('p2_3');
$handle->execute;

$list_partition->drop_partitions('p1');
$handle = $list_partition->prepare_drop_partitions('p2_3');
$handle->execute;

DESCRIPTION

MySQL::Partition is utility module for MySQL partitions.

This module creates a object for manipulating MySQL partitions. This is very useful that we no longer write complicated and MySQL specific SQL syntax any more.

INTERFACE

Constructor

my $mysql_partition:MySQL::Partition = MySQL::Partition->new(%args)

Create a new object which is subclass of MySQL::Partition. (MySQL::Partition::Type::Range or MySQL::Partition::Type::List.

Following keys are required in %args.

• dbh => DBI::db

• table => Str

• type => Str

  partitioning method. list(?: columns)? or range(?: columns)?.

  If list is specified, new method returns MySQL::Partition::Type::List object.

• expression => Str

  partitioning expression. e.g. event_id, created_at, TO_DAYS(created_at), etc.

Methods

my @partition_names = $mysql_partition->retrieve_partitions

Returns partition names in the table.

my $bool = $mysql_partition->is_partitioned

Returns the table is partitioned or not.

my $bool = $mysql_partition->has_partitione($partition_name)

Returns the table has a specified partition name or not.

Methods for manipulating partition

$mysql_partition->create_partitions($partition_name => $partition_description, [$name => $description, ...])

$mysql_partition->add_partitions($partition_name => $partition_description, [$name => $description], ...)

$mysql_partition->drop_partitions(@partition_names)

$mysql_partition->truncate_partitions(@partition_names)

Methods for MySQL::Partition::Handle

Each method for manipulating partition has prepare_* method which returns MySQL::Partition::Handle object.

• prepare_create_partitions
• prepare_add_partitions
• prepare_drop_partitions
• prepare_truncate_partitions

Actually, $mysql_partition->create_partitions(...); is a shortcut of following.

my $handle = $mysql_partition->prepare_create_partitions(...);
$handle->execute;

LICENSE

Copyright (C) Songmu.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

AUTHOR

Songmu y.songmu@gmail.com