Скачать или смотреть Solving the Invalid SQL Statement 900 Error: Oracle SQL Queries in SSIS

A comprehensive guide on how to make your Oracle SQL queries compatible with SSIS while avoiding the `Invalid SQL Statement 900` error.
---
This video is based on the question https://stackoverflow.com/q/64777232/ asked by the user 'Ariox66' ( https://stackoverflow.com/u/4062688/ ) and on the answer https://stackoverflow.com/a/64784750/ provided by the user 'Marmite Bomber' ( https://stackoverflow.com/u/4808122/ ) 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: Valid Query in Oracle SQL developer is invalid in SSIS

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.
---
Solving the Invalid SQL Statement 900 Error: Oracle SQL Queries in SSIS

When transitioning queries from Oracle SQL Developer to SQL Server Integration Services (SSIS), you might encounter a common hurdle: the infamous Invalid SQL Statement 900 error. This can be especially perplexing if the query runs flawlessly in SQL Developer but fails in SSIS. One common reason for this discrepancy stems from the inclusion of PL/SQL blocks or variable declarations, which are not supported in the same way within SSIS. In this post, we'll explore the reasons behind this issue and provide a structured solution to adapt your queries for seamless execution in SSIS.

Understanding the Problem

The structure of your original query might look something like this:

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

Here, you're utilizing PL/SQL constructs, such as the use of BEGIN...END blocks and variable assignments, which works perfectly in Oracle SQL Developer but translates poorly to SSIS due to differences in SQL dialects and execution environments.

Why Does This Matter?

SSIS doesn’t support PL/SQL: Unlike Oracle SQL Developer, SSIS cannot process PL/SQL blocks or variable declarations in the same manner.

Operational Context: In SSIS, the execution context assumes a simplified SQL structure, primarily standard SQL queries rather than procedural or batch commands.

Solution Breakdown

To resolve the Invalid SQL Statement 900 error and refactor your query for compatibility with SSIS, you need to eliminate PL/SQL constructs and use a more standardized SQL approach. Here’s how to do it:

Step 1: Refactor User Defined Functions

Instead of using variables to store results from your user_defined_function, you can employ Common Table Expressions (CTEs) to generate the necessary interim calculations. For example:

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

In this setup, you’re defining four CTEs (x1, x2, x3, and x20) that hold the results of your user-defined function.

Step 2: Adjust the Main Query

After setting up the CTEs, modify your main query to reference these CTEs correctly. Instead of trying to use a variable directly, here’s the adjusted syntax:

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

This change eliminates the need for variable definitions and PL/SQL blocks, creating a cleaner and more SSIS-compatible SQL statement.

Conclusion

Migrating queries from Oracle SQL Developer to SSIS can present challenges, particularly when dealing with variable assignments and PL/SQL blocks. By refactoring your SQL into Common Table Expressions, you create a straightforward SQL structure that is compatible with SSIS, allowing your queries to execute without errors. The key takeaway is to transform PL/SQL constructs into standard SQL components that SSIS can understand effectively.

With this knowledge in hand, you can streamline your data integration processes and avoid the Invalid SQL Statement 900 error. Happy querying!