Contributed by BBQ
on May 11, 2000 at 07:40 UTC
> database programming
The question says it all. While reading through perltoot, I noticed that the both look alot like (respectivly) a function call and a method call. But what of the practical use for either of them? In what do they differ?
|Answer: What is the difference between $DBI::errstr and $dbh->errstr|
contributed by btrott
$DBI::errstr is actually a variable, not a method
call. It holds the text of the last error on
any of the database handles.
$dbh->errstr is a method call on a database
handle. It returns the text of the last error
from "the last driver function called," according
to the DBI manpage.
In general, you should use $dbh->errstr, unless
you don't have an available database handle. For
example, if you're calling DBI->connect, you're
creating a database handle, so you don't actually
have one to call the errstr method on. So if
you're doing error checking on the connect
method, you should print out $DBI::errstr if
you get undefined back from connect.
When you're doing error checking for any database
handle methods (prepare, execute, etc.), you
should use $dbh->errstr. (Or just set RaiseError.)
|Answer: What is the difference between $DBI::errstr and $dbh->errstr?|
contributed by archfool
As a sidenote, if you are using PL/SQL in DBD::Oracle, there is a special method for PL/SQL errors:
my $msg = $dbh->func( 'plsql_errstr' );
die $dbh->errstr if ! defined $msg;
die $msg if $msg;
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