Troubleshooting ExecuteSqlRaw() Errors in Entity Framework Core with Oracle

Описание: Learn how to resolve the `ORA-00900 invalid SQL statement` error when using ExecuteSqlRaw() in Entity Framework Core with Oracle. This guide offers insights and solutions for common issues with SQL execution.
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Troubleshooting ExecuteSqlRaw() Errors in Entity Framework Core with Oracle

When integrating Oracle with Entity Framework Core, developers may encounter seemingly perplexing issues. One common problem arises when using the ExecuteSqlRaw() method, which can throw an error despite the SQL statement functioning perfectly in Oracle SQL Developer. In this guide, we will address a specific scenario: encountering the ORA-00900 invalid SQL statement error and its subsequent nuances when trying to execute a stored procedure.

The Problem at Hand

Consider the following SQL execution call you've made in your code:

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

When this code is executed, you receive an error indicating an invalid SQL statement. However, the same execution works flawlessly in Oracle SQL Developer. This discrepancy can be quite frustrating, particularly when you are confident in the validity of your SQL.

Further Complication

Upon correcting your SQL statement to:

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

You might encounter yet another error stating identifier SYSDBA.BACKFILL must be declared, despite being certain that the procedure exists. So, what is happening?

Understanding the Root Cause

The issues with the SQL execution stem from how Oracle recognizes names, permissions, and connections. Let’s break this down further:

1. Ownership of the Procedure

User Ownership: The error may indicate that the SYSDBA user does not own the BACKFILL stored procedure, which could be due to:

The procedure being defined with double quotes or in a mixed/low case format.

This means you'll need to call it with double quotes and match the letter case exactly as it was created.

2. Permissions Issues

Lack of Privileges: If you are trying to execute this procedure while connected as a user other than SYSDBA, you need to ensure that you have the proper privileges:

The EXECUTE privilege must be granted from SYSDBA to the user executing the ExecuteSqlRaw() command.

Recommended Solutions

Solution 1: Verify Procedure Ownership

Check if the procedure BACKFILL is indeed owned by SYSDBA. You can do this by running the following query in Oracle SQL Developer:

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

Solution 2: Adjust the SQL Call

If ownership verification shows the procedure is under a different owner or was created with specific casing, modify your SQL call accordingly. For example:

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

Solution 3: Grant Execution Privileges

If you've confirmed that you're connecting via a user other than SYSDBA, ask your DBA to run:

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

Conclusion

The integration between Entity Framework Core and Oracle can sometimes present challenges, especially concerning permission structures and SQL execution behavior. By understanding the ownership of stored procedures and the context in which your SQL commands are executed, you can effectively troubleshoot and resolve ExecuteSqlRaw() errors, ensuring a smoother development experience.

If you've encountered similar issues or have additional questions, feel free to drop a comment below! Your feedback is invaluable to us.