Hah. This is simple - use a hash for storing prepared statements. Untested pseudocode:
while (my $line = FILE) {
analyze $line to extract ($table, $value) pairs
foreach ($table, $value) pair {
my $sql_statement = "INSERT INTO $table VALUES(?)";
my $sth = store_or_retrieve($sql_statement);
$sth->execute($value);
}
}
my $sth_hashref;
sub store_or_retrieve {
my $sql_statement = shift;
if (exists $sth_hashref->($sql_statement)) {
return $sth_hashref->{sql_statement;
} else {
my $sth = $dbh->prepare($sql_statement);
$sth_hashref->{$sql_statement} = $sth;
return $sth;
}
}
However, I would suggest you probably have more work to do regarding your database structure - do you really only have one row in each table?
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