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Order Dapoxetine with No Prescription, DB2 on Rails provides the developer with many ways to retrieve information about errors which have occurred. Rails developers can take a look at the logs within the log folder in order to read the SQL errors returned by the datasever, order Dapoxetine from United States pharmacy. Dapoxetine from canadian pharmacy, But what about simple Ruby scripts. Let's try to connect to DB2 with the wrong user credentials:
conn = IBM_DB::connect("mydb", australia, uk, us, usa, Dapoxetine price, coupon, "myuser","my_wrong_pass")
#=> false
false, purchase Dapoxetine. Buy Dapoxetine online cod, That doesn't really help us too much. We know that something went wrong, but we don't exactly know what, Order Dapoxetine with No Prescription. Luckily for us, japan, craiglist, ebay, overseas, paypal, Purchase Dapoxetine online no prescription, the IBM_DB driver gives us all the tools that we need to properly troubleshoot problems. The example above can be rewritten in this way:
if conn = IBM_DB::connect("mydb", buy Dapoxetine from canada, Buying Dapoxetine online over the counter, "myuser","my_wrong_pass")
# do something interesting
else
# conn is false
raise IBM_DB::conn_errormsg
end
#=> RuntimeError: [IBM][CLI Driver] SQL30082N Security processing failed with reason
"24" ("USERNAME AND/OR PASSWORD INVALID"), order Dapoxetine online c.o.d. Order Dapoxetine from United States pharmacy, SQLSTATE=08001 SQLCODE=-30082
Okay, that should have us covered when it comes to failed attempts to connect to the database, australia, uk, us, usa, Fast shipping Dapoxetine, but what about failed queries. Analogously, Dapoxetine trusted pharmacy reviews, Where to buy Dapoxetine, the IBM_DB driver provides us with the IBM_DB::stmt_errormsg method:
if stmt = IBM_DB::exec(conn, "SELECT * FROM WRONG_TABLE)
# process the results
else
# stmt is false
raise IBM_DB::stmt_errormsg
end
#=> RuntimeError: => [IBM][CLI Driver][DB2/NT] SQL0204N " DB2ADMIN.WRONG_TABLE" is
an undefined name, Dapoxetine price, coupon. SQLSTATE=42704 SQLCODE=-204
DB2 error messages are usually easy to understand and with a bit of help from the DB2 Information Center you should be able to get out of trouble most of the time.
DB2 CLI Tracing
Order Dapoxetine with No Prescription, Despite the helpful error messages, there are situations in which troubleshooting can be hard because everything seems to be in the right place but your application is still acting up for some reason. Dapoxetine for sale, The ultimate tool when it comes to troubleshooting for DB2 and Ruby/Rails application problems is to enable DB2 CLI (Call Level Interface) tracing. The CLI trace captures information about applications that access the DB2 CLI driver, buy Dapoxetine no prescription. Dapoxetine samples, Tracing gives you the ability to analyze low level calls to the C driver API with details on the input and output, to and from the database, online buy Dapoxetine without a prescription. Purchase Dapoxetine online no prescription, The resulting trace is not particularly easy to understand for a DB2 novice, but it can offer a microscopic view which is invaluable for understanding problems that are hidden by the abstractions of higher level APIs, buy cheap Dapoxetine, Buy Dapoxetine without prescription, and allow you to see to a certain degree what's happening under the hood.
The two free PDFs, Call Level Interface Guide and Reference, purchase Dapoxetine online, Order Dapoxetine from mexican pharmacy, Volume 1 and Volume 2 are the best references if you need to look up calls in your CLI trace files. Instructions on how to enable CLI level tracing for DB2 Express-C LUW (Linux/Unix/Windows) can be found here.
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Posted by Antonio Cangiano | October 19 2007 01:07 am | How-to and Tips&Tricks
Deep Blue on 22 Oct 2007 at 12:20 pm #
So glad to see your fast response:) Very useful information
Deep Blue on 22 Oct 2007 at 12:22 pm #
btw, the feedburner was blocked by China Great Firewall, I can not subscribe the rss feed. Could you provide the original feed via WP?
Antonio Cangiano on 22 Oct 2007 at 1:37 pm #
Deep Blue, the original feed is redirected to FeedBurner to redirect the existing subscribers. However I duplicated the original feed for you and placed it at http://db2onrails.com/wp-atom10.php. You should have access to this. Please let me know if you encounter any problems with it.
Cheers,
Antonio
paul on 23 Oct 2007 at 8:00 am #
Good site, will there be an adapter at any point for iSeries on rails? Thanks.
Antonio Cangiano on 23 Oct 2007 at 10:12 am #
Hi Paul,
the current driver and adapter support DB2 for iSeries. For further questions or if you require more information, please use the IBM_DB Rubyforge forum.
Thanks,
Antonio
Michael Jones on 21 Feb 2009 at 3:40 am #
Thanks !! Very helpful post!