http://www.perlmonks.org?node_id=622359


in reply to What is the difference between $DBI::errstr and $dbh->errstr?

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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