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Category: Development

DBMS_PIPE Connecting the Sessions

Mustafa, 2023-08-182023-08-18

Hi, It has been a long time since I wrote something. It is summer and I was in a long vacation. Well I worked mostly of course but at least get away a little bit. In this post I would like to talk about PIPEs in Oracle Database. It is…

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23c is Finally Here!

Mustafa, 2023-04-06

Hello everyone, Well, it is just developer version so don’t try to install on your environments 🙂 My twitter is full of 23c tweets about these days. I also downloaded immediately and tested what I wanted the most for 4-5 years! “Schema Level Privileges” and I am so excited about…

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Not Deploying is also Important!

Mustafa, 2023-03-31

Hello there, I mentioned about writing a nasty ORA-600 error and here it is; One day I woke up and one my databases was started to raise some ORA-600 errors: ORA-00600: internal error code, arguments: [ktfacht1-0], [], [], [], [], [], [], [], [], [], [], [] there were also…

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Unique Columns For V$Sql

Mustafa, 2022-11-11

Hi, Until yesterday I was saying SQL_ID and CHILD_NUMBER is enough to get a sql child cursor from V$SQL and today I know I was wrong. Probably many times you needed the sql statement that a session is running. To do that you query V$session and find the session information…

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How to Check Empty Space in a Securefile LOB

Mustafa, 2022-09-272022-10-12

Hi, PS: please check last sql statement in this post for shorter and faster solution. first sql is for showing all information about the lob. Yesterday, while checking segment space usage data in a client’s database and some of the LOB segments were absurdly big. So, I want to check…

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catcon.pl cheat sheet

Mustafa, 2022-08-262023-04-24

Hello, Oracle uses a container database architecture permanently anymore, you should be familiar with “catcon.pl” perl file. Let’s say you have container database with 10 different PDBs and you need to run a script file on all of those pdbs (maybe even in root and seed too) so what you…

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How to Convert LONG to Clob PART 2

Mustafa, 2022-05-062022-05-06

Hi, I just want to write a small post today. Some time ago, I shared a way to convert long to clob in a query directly: https://mustafakalayci.me/2020/04/06/how-to-convert-a-long-column-to-clob-in-a-query/ Even if this method works, it works really slow and anything slow annoys me! So, I want to share another method which is much…

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Tables with Memoptimize for Read (fast lookup)

Mustafa, 2022-02-152022-02-15

Hi, I would like to share my initial thoughts about memoptimized for read (fast lookup) tables in this post. fast lookup tables came with 18c and they are here to provide faster access to a table if you are using primary key with a equality condition. this is basically single…

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Blockchain vs Immutable tables

Mustafa, 2021-08-202021-10-26

Hi, as you know 21c is here for linux and some new features are (as always) pretty exciting. two of them are Blockchain and Immutable tables. Let’s explain and test. first of all, those are new features for 21c but they are backported to 19c. at 19.10 you are able…

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  • Sessions with details
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  • DBCA Templates and Dangerous “General Purpose” Template
  • NON-CDB to PDB Migration Horror
  • 23c is Finally Here!
  • Not Deploying is also Important!
  • Damaged rowid is referenced! Health Monitor
  • Old Obsolete Backup is not Deleted
  • Autoupgrade doesn’t Upgrade Timezone Version While RU Patching
  • Unique Columns For V$Sql
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