For a customer, I had to check if partitioning improves performance of massive and concurrent inserts. The goal is to execute several Inserts in parallel via dbms_parallel_execute package (my previous blog “parallelize your Oracle Insert with DBMS_PARALLEL_EXECUTE” explains how to use dbms_parallel_execute). The idea is to insert more than 20 millions of rows in 2 tables : One table not…
One of the challenge of all PL/SQL developers is to simulate the Production activity in a Non Prod. environment like for example different Insert executed by several sessions. Different tools exist like Oracle RAT (Real Application Testing) but under license or you can create your own PL/SQL package using DBMS_SCHEDULER or DBMS_PARALLEL_EXECUTE packages. The aim of this blog is to…
The DUAL table is automatically created by Oracle and contains one column (DUMMY) and one row (x value). This table is often used by SQL developer in PL/SQL code (Package, Functions, Trigger) to initialize variables storing technical information such as for example SYSDATE, USER or HOSTNAME. Querying DUAL table is generally faster as we can see below: SQL> select sysdate…
This year the APEX connect conference goes virtual online, like all other major IT events, due to the pandemic. Unfortunately it spans only over two days with mixed topics around APEX, like JavaScript, PL/SQL and much more. After the welcome speech and the very interesting Keynote about “APEX 20.1 and beyond: News from APEX Development” by Carsten Czarski, I decided…
This year again the APEX connect conference spans over three days with mixed topics around APEX, like JavaScript, CSS, SQL and much more. After the welcome speech and the Keynote about “Reconciling APEX and the Thick Database Paradigm” by Bryn Llewellyn I decided to attend presentations on following topics: – Temporal Validity and Flashback Data Archive – Universal Theme and…
Disclaimer: This is in no way a recommendation to avoid PL/SQL. This post just describes a case I faced at a customer with a specific implementation in PL/SQL the customer (and me) believed is the most efficient way of doing it in PL/SQL. This was a very good example for myself to remind me to check the documentation and to…
For quite a long time I did not work anymore with PL/SQL and was quite happy when I had the chance to review some code at a customer. The status today: I am not that happy anymore 🙁 Let me explain why and show you some examples on what was discovered. Of course all of the identifiers have been obfuscated…
As I am still interested in PLSQL I browsed the documentation some days ago and learned something new which is about functions returning collections. Here is a simple test case: Let’s create a simple package, specifying on collection and one function: create or replace package pkg1 as type t1 is table of number index by pls_integer; function f1 ( a…
Le marché du Database Activity Monitoring (DAM) devenant de plus en plus important avec des produits tels que Imperva, Guardium ou Sentrigo, je me suis intéressé au produit Oracle Database Firewall, qu’Oracle présente comme un substitut aux différents acteurs du marché des DAMs.
My colleague Hervé Schweitzer reported a very interesting issue to me. It is about the usage of Grid Control 11g while monitoring the available space on an Oracle database – in our case a 10.2.0.3 target database. This post continues my last post about the free space management in a tablespace in relation to the recycle bin management.
During the last weeks, I was confronted to an uncommon bug during the database upgrade from security sensibledatabases.
The upgrade was sticking for hours on the script c1101000.sql. which tried to fill the column DBID with the database DBID of the tables AUD$ and/or FGA_LOG$.
Are you experiencing network access issues after a migration to Oracle Database 11g Release 2 (11.2)? If yes, you probably have to allow the concerned PL/SQL packages to access your network again. This posting will show you how.
