sybperl-l Archive

From: michael dot peppler at bnpparibas dot com
Subject: Re: Trigger errors
Date: Feb 14 2006 1:28PM

There are various possibilities.

The first is that you return an error code from your stored proc (ie.
RETURN 1), and then check this return status (CS_STATUS_RESULT). If it is
non-0 then you have an error condition. In general I've tended to return
the same value that I use in the RAISERROR.

The second is that you trap errors in the server callback and raise the
error internally that way.

I also noted that you use $$db_ref for the database handle - this shouldn't
be necessary as a database handle is already a reference...

Michael




Internet
STRAUSS@ap.org@peppler.org - 14/02/2006 14:16


Sent by:    owner-sybperl-l@peppler.org

To:    sybperl-l

cc:


Subject:    Trigger errors



Is there a  "recommended" way to trap errors generated by triggers assuming
the trigger is  using raiserror to signal a problem?

I know that given  the following in my trigger:

error:
        select @msgText =  "Related Key -" + @fieldname +  "- "  +
                 "does not exist in the table " + @desttablename  +
                 " attempt to insert invalid foreign key into table - "  +
                 @sourcetablename + " -Failed "
         raiserror 30053 @msgText
        rollback  tran
         return

that I will get a callback in my client message callback function but  the
question is how do I indicate to the calling perl script that a problem
occurred?

I have the following routine that executes the stored proc in  question:

sub  exec_sql_nores {
        my $db_ref =  shift;
        my $sql =  shift;
        my ($row_count,  $result_type, $status);

        # establish a handle to the  database
        $row_count =  $$db_ref->ct_execute($sql);
         while (($row_count = $$db_ref->ct_results($result_type)) ==
CS_SUCCEED)  {
                 if ($result_type == CS_CMD_FAIL)  {
                         printf STDERR "Error in SQL: %s\n",  $sql;
                 }
                 next unless  $$db_ref->ct_fetchable($result_type);
                 my  %data;
                 while (%data = $$db_ref->ct_fetch(CS_TRUE))  {
                         ;
                 };
         }
        return  $row_count;
}

This routine returns CS_END_RESULTS (-205) as it would if the  stored proc
completed successfully.


Is it a matter  of looking at the error code raised by raiserror and then
returning CS_FAIL from  the message callback?

Thanks for any  help!

Fred



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