Beefy Boxes and Bandwidth Generously Provided by pair Networks
Don't ask to ask, just ask
 
PerlMonks  

Re: DBI: How to update 150K records efficiently

by moritz (Cardinal)
on Mar 31, 2008 at 14:10 UTC ( #677524=note: print w/ replies, xml ) Need Help??


in reply to DBI: How to update 150K records efficiently

If you haven't benchmarked it yet, try this:

my $sth = $dbh->prepare('UPDATE myTable SET va = ?, vb = ? WHERE vc = +?'); while (my $record = <$input>){ my @values = (split(/\|/,$record))[1,3,5]; $sth->execute(@values); } $sth->finish()

At least it avoids generating hashes for everything, and it uses a cached "prepared statement".


Comment on Re: DBI: How to update 150K records efficiently
Download Code
Re^2: DBI: How to update 150K records efficiently
by Juerd (Abbot) on Mar 31, 2008 at 15:16 UTC

    Oh, but the OP's code also uses a cached prepared statement. DBIx::Simple handles this internally. The problem is that before it can access the cache, it has to generate the query string all over :)

    Juerd # { site => 'juerd.nl', do_not_use => 'spamtrap', perl6_server => 'feather' }

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://677524]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others lurking in the Monastery: (8)
As of 2014-12-27 20:31 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    Is guessing a good strategy for surviving in the IT business?





    Results (177 votes), past polls