Скачать или смотреть Resolving the ORA-01722: invalid number Error in PL/SQL with DEFAULT NULL ON CONVERSION ERROR

Discover how to handle the `ORA-01722: invalid number` issue in your PL/SQL parser by implementing the `DEFAULT NULL ON CONVERSION ERROR` option for clearer data handling.
---
This video is based on the question https://stackoverflow.com/q/72429645/ asked by the user 'Arifullah' ( https://stackoverflow.com/u/17709551/ ) and on the answer https://stackoverflow.com/a/72431509/ provided by the user 'MT0' ( https://stackoverflow.com/u/1509264/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to add desired column in pl/sql parser?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Understanding the ORA-01722: invalid number Error in PL/SQL

When working with Oracle's PL/SQL, developers often encounter various errors that can disrupt the flow of their applications. One such error is the infamous ORA-01722: invalid number, which signals that there’s been an attempt to convert a string that cannot be interpreted as a number. This guide will discuss how to effectively add a desired column in a PL/SQL parser and overcome the difficulties presented by this error.

The Problem: Invalid Number Error

You may find yourself working with a SQL query that seems correct but triggers the ORA-01722 error. Here’s the code that produces this error without showing any syntax issues:

[[See Video to Reveal this Text or Code Snippet]]

If you encounter the ORA-01722 error while executing similar queries, it indicates a mismatch between expected numeric and actual string data types in your columns. This often arises when the data contains non-numeric characters in a field expected to hold numbers.

The Solution: Using DEFAULT NULL ON CONVERSION ERROR

If you're using Oracle 12 or later, there is an efficient way to handle this issue by explicitly converting values while implementing the DEFAULT NULL ON CONVERSION ERROR syntax. This allows the database to return NULL instead of raising an error if the conversion fails.

Step-by-Step Solution:

Here’s the revised SQL query utilizing this approach:

[[See Video to Reveal this Text or Code Snippet]]

What This Change Does:

This adjustment tries to convert c.phone_no and col002 to numbers, and if it fails, it will simply return NULL, allowing the rest of the query to continue executing without interruption.

By implementing this strategy, you can identify if either c_phone_no or col002 contains strings that cannot be converted to numbers.

How to Troubleshoot Further:

If this change resolves the issue yet you want to identify the problematic rows, you can run the following queries:

To find invalid rows in your original dataset:

[[See Video to Reveal this Text or Code Snippet]]

To check invalid phone numbers in your target table:

[[See Video to Reveal this Text or Code Snippet]]

These queries will help you isolate the data that is causing the invalid number error, allowing you to correct it before it impacts your operations.

Conclusion

In summary, when facing the ORA-01722: invalid number error in your PL/SQL parser, take advantage of Oracle's DEFAULT NULL ON CONVERSION ERROR feature. This approach not only improves code resiliency but also aids in troubleshooting invalid data entries in your datasets.

By implementing these methods, you enhance the robustness of your SQL queries, allowing for smoother data management processes in your applications.