DBA

Proxy authentication in Oracle

Proxy User Authentication in Oracle

Proxy user authentication is a powerful feature in Oracle that lets one database user (proxy user) connect to the database "on behalf of" another user (client user).

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When should we use dynamic SQL

When Should We Use Dynamic SQL?

A comparison between static SQL vs dynamic SQL shows us pretty clearly that, if there exists a choice, we are better off choosing static SQL. So, when should we use dynamic SQL?

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Check if JVM is Installed in Oracle

How to Check if JVM is Installed in Oracle

I recently thought of using Java’s built-in BigInteger.gcd() method inside a PL/SQL function wrapper to calculate GCD in SQLs. And so I wrote the Java code and ran it on Oracle XE. Things didn’t go as planned.

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Oracle XML Object-Relational Storage

Oracle XML Object-Relational Storage [EXAMPLE]

After the post on models for storing XML data in Oracle and examples of binary XML storage, here’s a detailed look at the rigorous and performant structured XML storage or object-relational storage.

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Oracle Binary XML Storage

Oracle Binary XML Storage, With or Without XML Schema [EXAMPLE]

The previous post on storing XML data in Oracle gave an overview of binary XML storage: compact, flexible, compatible with XML data with or without associated XML schema. This post shows working examples of binary XML storage 1.1. without XML Schema 1.2 with XML Schema

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Range Interval Partitioning

Oracle 11G brought with it a beautiful new twist to range partitioning – the ability to create partitions on-the-fly rather than having to pre-create all partitions. Hello interval partitioning.

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Grant SELECT on V$ Views

When querying v$instance or v$session[1] as a non-admin user, you might come across this error: The error suggests that the non-admin user does not have the SELECT privilege on the sys-owned v$ view. On the face of it, the fix appears as simple as logging in as sys and granting select on the v$ view […]

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Access Control List (ACL) in Oracle 11G

I recently upgraded Oracle XE from 10G to 11G, and found that none of the PL/SQL code using UTL_HTTP was working after upgrade. The code failed with the error: Oracle 10G used to be happy as long as the user running network packages like UTL_HTTP had execute permission on the package. Oracle 11G and above […]

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ORA-12560: TNS:protocol adapter error

Sometimes you try to login to your Oracle XE on your home computer, and get this curt blocking response: Here’s the top reason why it might happen and how to fix it.

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Thumbnail image for ORA-01450: Maximum Key Length Exceeded – Possible Causes and Fix

ORA-01450: Maximum Key Length Exceeded – Possible Causes and Fix

ORA-01450 might crop up when a table index is being created in the database. ORA-01450: maximum key length (6398) exceeded Oracle documentation has this to say about the error: Cause: The combined length of all the columns specified in a CREATE INDEX statement exceeded the maximum index length. The maximum index length varies by operating […]

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