This naive use of
->in_storage leads to a race condition:
sub insert_row {
my ($self, $run) = @_;
if ($run->in_storage) {
return;
} else {
# race condition here
$run->insert;
return 1; # ???
}
Part of the problem is that the Oracle driver throws an exception for primary key violations. Catching that exception requires that I know what the exception looks like, and that leads to the Oracle-specific code.
If, for instance, $run->insert returned false if the insert failed for a unique index violation, then I could write database independent code.
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