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Exception Handling In perl
Is it possible to have exception handling in perl with try catch loop? I am using DBI and is inserting data from a csv into a database inisde a while loop. Can I use try catch loop instead of eval {.........}; if($@){.....} commands. I want that if a insertion fails that the process should not stop and should continue after throwing an excpetion till the end of the CSV.
I am trying to use the error module but it didn't work.......
use Error qw(:try);
try{
$sql = qq{Insert into SHIMADZU_METADATA(User_id,
$sth = $dbh->prepare($sql) || die;
$sth->execute($UserId, $datafile, $fileDate);
$sth->commit();
}catch{
}
I am trying to use the error module but it didn't work.......
use Error qw(:try);
try{
$sql = qq{Insert into SHIMADZU_METADATA(User_id,
$sth = $dbh->prepare($sql) || die;
$sth->execute($UserId, $datafile, $fileDate);
$sth->commit();
}catch{
}
Yes, the eval statement can be used. The 'try' function from that module is mostly just syntactic sugar built around 'eval'.
You haven't explained "it didn't work" in enough detail for experts to be able to give you much of an answer. Please elaborate.
You haven't explained "it didn't work" in enough detail for experts to be able to give you much of an answer. Please elaborate.
jmcg is quite right. Eval will do just fine. In either way I'd recommend you turn on RaiseError on the database handle, at least for the duration of the try block:
That way it dies whenever there's an error, not just on the prepare (in fact, the execute statement is a lot more dangerous).
eval {
local $dbh->{RaiseError} = 1;
};
FYI, the Error syntax is:
try {
...
} catch Error with {
my $Err = shift;
...
};
or
try {
...
} otherwise {
...
};
That way it dies whenever there's an error, not just on the prepare (in fact, the execute statement is a lot more dangerous).
eval {
local $dbh->{RaiseError} = 1;
};
FYI, the Error syntax is:
try {
...
} catch Error with {
my $Err = shift;
...
};
or
try {
...
} otherwise {
...
};
ASKER
jmcg,
"it didn't work" means that once a particular row failed and threw an error ....the script stopped running and nothing following got transmitted...............
Subirc
"it didn't work" means that once a particular row failed and threw an error ....the script stopped running and nothing following got transmitted...............
Subirc
Just off the top of my head, I think you'll need to arrange to insert one row at a time. This will allow you to handle and dismiss the exception when it occurs, then continue. I don't know of a way to both have the error reported and to continue processing after the error.
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ASKER
ya I am doing one row at a time
use strict;
use DBI qw(:sql_types);
eval{
local $dbh->{RaiseError} = 1; #added as per kandura's suggestion
$sth->execute($UserId, $datafile, $fileDate);
$sth->commit();
};
if ($@) {
print $@
}
Here's the error.......
Can't locate object method "Commit" via package "DBI::st" (perhaps you forgot to load "DBI::st"?) ...never seen this error
use strict;
use DBI qw(:sql_types);
eval{
local $dbh->{RaiseError} = 1; #added as per kandura's suggestion
$sth->execute($UserId, $datafile, $fileDate);
$sth->commit();
};
if ($@) {
print $@
}
Here's the error.......
Can't locate object method "Commit" via package "DBI::st" (perhaps you forgot to load "DBI::st"?) ...never seen this error
ASKER
Think it's a diff error..... can't able to see commit........I tried commit()....but still failed......
ASKER
got it; it shld be $dbh->commit not $sth......................
ASKER
Thanks,
Subirc