sql - Perl many insert statments into mysql database -

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i have code perl looks this:

@valid = grep { defined($column_mapping{ $headers[$_] }) } 0 .. $#headers;  ...  $sql = sprintf 'insert tablename ( %s ) values ( %s )',   join( ',', map { $column_mapping{$_} } @headers[@valid] ),   join( ',', ('?') x scalar @valid); $sth = $dbh->prepare($sql);  ...  @row = split /,/, <input>;  $sth->execute( @row[@valid] );

(taken mob's answer previous question.)

that dynamically building sql insert statement csv data, , allowing csv data proper headers column mapping picked.

i have been looking examples on how insert statment multiple rows of data @ once.

my perl script needs run around few hundred million insert statments, , doing 1 @ time seems slow, since server running on has 6gb of ram , slowish internet connection.

is there way can upload more 1 row @ time of data? 1 insert statment uploads maybe 50 rows, or 100 rows @ once? cant find out how perl dbi.

my $sql_values = join( ' ', ('(?, ?, ?)') x scalar(@array) );

as said before, can flatten it.


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