Do you need to create PDF reports from PL/SQL?
There are a number of options:
- Anton Scheffer wrote a PL/SQL package called AS_PDF3 that covers all the basics: Different fonts (including TrueType), images, and tables.
- There's the commercial PL/PDF package that has more features, such as the ability to use existing PDF documents as templates for new documents, compression, encryption, and more. There's also an extra Toolkit component which allows you to extract pages from (more...)
I have been awfully quiet on my blog lately. I think that is because I have been busy with other things, like my garden and stuff like that. There are some ‘techie’ thing I have done in the meantime, though,
I have submitted a couple of abstracts for Tech14. Hope at least one of them gets selected. I really like presenting and if it is in a different country, that is just a plus. That (more...)
firstname.lastname@example.org > create procedure p is begin null; end this_does_not_compile;
Warning: Procedure created with compilation errors.
email@example.com > show errors
Errors for PROCEDURE P:
1/32 PLS-00113: END identifier 'THIS_DOES_NOT_COMPILE' must match 'P'
at line 1, column 11
firstname.lastname@example.org > REM expexted
email@example.com > create function f return number is begin return null; end this_does_not_compile;
Warning: Function created with compilation errors.
firstname.lastname@example.org > (more...)
There is a ‘rule’, I think it was created by Tom Kyte, stating: If you can do it in SQL, do it in SQL. I came across some code the other day that makes perfect sense to do then you are running an Oracle 10g (or earlier) instance. I rewrote the code to use only the EMP and DEPT tables to protect the suspects and maybe innocent.
The function defined is something like this:
I have reviewed the latest edition of Oracle PL/SQL Programming. This is not a book, at least for me, that I would read front to back. I use it mostly as a reference, but the great thing about this book is that you can also use this book to learn programming PL/SQL from scratch.
The book is nicely ordered into different parts, like Program structure and how to use SQL in PL/SQL (which by the (more...)
After a presentation by Lucas Jellema I decided to try something with types in Oracle. One of the issues posed in this presentation was that the type cannot include self-reference. Neither direct nor indirect.
A table like the emp table cannot be expressed as an object type. The table has a column mgr which is a reference to another employee.
So I tried something like this:
This year, from June 22 - June 26, the best convention in the world, ODTUG’s KScope14 will be held in Seattle, Washington. I am already looking forward to meeting some ‘old’ friends again, creating new friends and seeing some of the best content by presenters from all over the world.
Some of the presentations I am looking forward to:
In the Developer’s Toolkit track:
It annoyed me slightly that when I googled modify_snapshot_settings just now and all of the examples used huge numbers for the retention with (at best) a brief comment saying what the number meant. Here is a better example with slightly more readable code. Hope a few people down the road (more...)
Here are two interesting enhancements in Oracle database 12c PL/SQL. PL/SQL subprogram defined using WITH clause of a subquery – Oracle database 12c allows PL/SQL declaration section in the WITH clause. One can define PL/SQL function or procedure into a WITH clause. Functions declared in the PL/SQL declaration section can (more...)
Working on the chapter that covers best ways of manipulating with object collection. Of course, if you talk about pagination of the rowset, it is very tempting to test Oracle 12c new feature - OFFSET…FETCH.
Unfortunately, immediately got an issue. It seems to me that passing a variable to FETCH (more...)
I was looking at the Apex 4.2.2 installation script (coreins.sql), and noticed the mention of a new package, wwv_flow_json, which is apparently being worked on but was removed at the last minute "as no longer required for 4.2.2".
Even though the package is not installed (more...)
Over the weekend one of my friends asked me for a clarification on RESULT_CACHE
- a really interesting functionality that allows Oracle to cache in SGA results of PL/SQL function calls.
The point of confusion was the fact that between 11gR1 and 11gR2 Oracle development team significantly re-thought this feature (more...)
Yet another performance tuning story
, similar to one that happened about a month ago
. Just to keep it short:
- once upon a time there was a very time-consuming module.
- eventually we were forced to take much closer look - WHY is it so time-consuming
- we found in our own (more...)
After a couple of requests at IOUG Collab'13 I decided to resurrect a pretty old topic that I've participated in 2008 (since in 5 years there was no changes on that front :-) ).
As we all know, starting version 11g Oracle tracks PL/SQL dependencies in much more granular way (more...)
I was looking for PL/SQL examples to use metadata and data filtering in datapump API, but I didn't find any. So here is one example. It uses table reload_dev_tables to specify what schemas/tables should be exported using data pump and what where clause should be set.
Structure for reload_dev_tables:
For the Friday evening I decided to dig out my example from the most recent of my published books (Expert PL/SQL Practices, APress, 2011
) - it was a very fun project to work with: first, to come with with the idea of such multi-author book, second, to write (more...)
This post is a continuation of a topic, I've raised previously - dynamic implementation of generic searches
. As I mentioned in that post, there are circumstances, when it is much more convenient to return a pointer to a row-set instead of that row-set. Or in terms of Oracle - REF CURSOR (more...)
It is a very common problem - how do you implement generic search over the table? By generic search I mean that users are provided with tons of different options that could be used in all possible permutations.
It leads to a standard problem - how do you make sure (more...)
I'm busy deriving file layouts from PL/SQL. Probably close to 100 file definitions...each of them slightly different, each of them defined in the code. Fun!
There are a mixture of types too, fixed width, csv, etc. Thankfully, I've read enough of the code now that it's relatively easy to (more...)