I want to write a little wrapper function to the prepare() and execute() part of querying a database. For instance, here's a relatively simple version:

sub safe_query_execute {
    my ($db_handle, $query) = @_;

    my $query_handle = $db_handle->prepare($query)
        or confess "Error preparing query: $query\n"
                    . "Error: $DBI::errstr\n";

    eval {
        $query_handle->execute();
    };
    if ( $@ ) {
        confess "QUERY ERROR: $DBI::errstr\n"
                . "QUERY: $query\n";
    }

    return $query_handle;
}
[download]

Pretty basic, given a db handle and a query, prepare()'s and execute()'s it, returning the executed handle, doing error checking along the way.

Yes, i'm aware that i could accomplish this other ways, but I dont necessarily want to execute all queries this way in a script, some queries will want some of their own specialized error checking, like recovering from the error, etc. I wrote this because I write similar code often in my scripts, so i wrapped it.

Note, i used or confess on the prepare(), and eval{} on the execute() - opinions on that could be another thread.

Anyhow, i want to write a nice (similar) wrapper for queries with input bind params. The problem im running into is getting the query for error statements. I'd like the function to look something like:

sub bind_param_safe_query_execute {
    my ($query_handle, @params) = @_;

    eval {
        $query_handle->execute(@params);
    };
    if ( $@ ) {
        confess "QUERY ERROR: $DBI::errstr\n"
# somehow print the query
    }
}
[download]

I dont want to have to pass in the query, sometimes they're created on the fly, and are out of scope when the handles are executed, but i cant find any way to get the query out of the handle itself. Is this possible?

Any other approaches to accomplish this same idea?

Note: someday i'll perhaps add stuff for giving SQL_TYPES to the bind params, perhaps with a Tie::IxHash instead of an array. Perhaps other options eventually too.

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