Reference

DBIx::BulkLoader::Mysql(3pm)

Perl extension for mysql bulk loading

NAME

DBIx::BulkLoader::Mysql - Perl extension for mysql bulk loading

SYNOPSIS

  use DBIx::BulkLoader::Mysql;
  # non repeating portion of the insert statement
  my $insert='insert into bulk_insert (col_a,col_b,col_c) values ';
  # repeating portion of the insert statement
  my $placeholders='(?,?,?)';
  # how many rows to buffer until insert is called
  my $bulk_insert_count=5;
  # db connection
  my $dbh=DBI->connect(db connection info here);
  my $placeholder_count=3;
  my ($bulk,$error)=DBIx::BulkLoader::Mysql->new(
                dbh=>$dbh
                ,sql_insert=>$insert
                ,placeholders=>$placeholders
   );
   die $error unless $bulk;
   for( 1 .. 50 ) {
     $bulk->insert(qw(a b c));
   }
   # inserted 50 rows at once
   $bulk->insert(qw(l l x));
   # inserted 0 rows
   $bulk->insert(qw(l l x));
   # inserted 0 rows
   $bulk->flush;
   # inserted 2 rows 1 at a time

DESCRIPTION

Simple buffering bulk loader interface for mysql.

EXPORT

None.

OO Methods

This section covers the OO methods for this package.

•

my ($bulk,$error)=DBIx::BulkLoader::Mysql->new(%hash);

Package constructor.

        $bulk is undef on error
        $error explains why $bulk is undef

Constructor options

                dbh=>$dbh
                 Sets the DBH object
                sql_insert=>$insert
                 Contains the body of the sql statement minus the
                 placeholder segment.
                placeholders=>$placeholders
                 Placeholder segment of the sql statement
                placeholder_count=>3
                 Optional argument
                  If you get strange insert counts or dbi bails
                  set this option manually
                bulk_insert_count=>50
                 Optional argument
                  Sets the number of rows to buffer for insert.
                prepare_args=>{}
                 Optional argument
                  Arguments to be passed to $dbh->prepare
                  See DBD::mysql
•

$bulk->flush;

Empties the placeholder buffer

•

$bulk->insert($x,$y,$z);

Inserts the placeholder arguments onto the buffer stack. This does not cause an insert, unless the total number of rows is the same as the constructor call "bulk_insert_count=>50".

•

my $columns=$bulk->get_placeholder_count;

Gets the total number of column placeholders.

•

my $buffer_size=$bulk->get_buffer_size;

Gets the total size of the array used for insert.

•

my $sql_single=$bulk->single_sql;

Gets the raw sql statement used for single row inserts.

•

my $bulk_sql=$bulk->bulk_sql;

Gets the raw sql statement used for bulk row inserts.

•

my $single_sth=$bulk->get_prepared_single_sth;

Gets the prepared statement handle for single row inserts.

•

my $bulk_sth=$bulk->get_prepared_bulk_sth;

Gets the prepared statement handle for bulk row inserts.

•

my @buffer=$bulk->get_buffered_data;

Returns a list containing the current buffered data

SEE ALSO

DBI, DBD::mysql

Source Forge Project

If you find this software usefil please donate to the Source Forge Project.

DBIx BulkLoader Mysql <https://sourceforge.net/projects/dbix-bulkloader/>

AUTHOR

Michael Shipper

COPYRIGHT AND LICENSE

Copyright (C) 2010 by Michael Shipper

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.4 or, at your option, any later version of Perl 5 you may have available.