Скачать или смотреть Solving AS/400 QSYRUSRI API Parameter Issues: How to Retrieve Supplemental Group Data Correctly

Learn how to troubleshoot the AS/400 QSYRUSRI API parameters for accurate retrieval of supplemental group data in Iseries user profiles.
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This video is based on the question https://stackoverflow.com/q/64750917/ asked by the user 'Mark Sanderson' ( https://stackoverflow.com/u/1166924/ ) and on the answer https://stackoverflow.com/a/64768110/ provided by the user 'Barbara Morris' ( https://stackoverflow.com/u/4143022/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the Problem: Using the QSYRUSRI API

If you're working with the AS/400 QSYRUSRI API and facing issues retrieving the number of supplemental groups from an Iseries user profile, you’re not alone. A common challenge involves correctly implementing the data structure and ensuring that API parameters are properly set.

In your implementation, you might encounter a scenario where the suppGrpIdx subfield (which points to where supplemental group data begins) returns zero, while the suppGrp subfield (which holds the number of supplemental groups) reflects the correct value. This discrepancy can be confusing and often stems from how the receiver variable is defined and utilized.

The Setup: Exploring the Current Implementation

Let’s dive into the details of your current data structure and parameters. Below is an explanation of the relevant sections of your code.

Data Structure Definition

You defined a data structure for USRI0300 to hold various pieces of user profile information. Here’s a snippet of the structure:

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

In this setup:

suppGrpIdx should hold the offset pointer to the beginning of the array of supplemental groups.

suppGrp should contain the total number of supplemental groups found.

The Prototype Declaration

Your prototype for the QSYRUSRI API looks as follows:

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

Here, the RcvVar is set to accept a variable length receiver, but the length parameter must accurately reflect the size allocated for data storage.

The Solution: Ensuring Correct Receiver Size

Step 1: Define Enough Storage

The first crucial step is to ensure that the receiver variable—you’ve named it p_usrData—is large enough to contain all returned data from the API call. It appears that the instance where you assigned p_usrData a smaller-than-necessary buffer size may be the cause of your issue.

Step 2: Update the Length Parameter

When invoking the API, it's imperative that the second parameter (the size of the receiver variable) reflects the true size of the allocated storage. If you’re using a based data structure, make sure to set the length of p_usrData to the maximum size you defined.

Example Update

Suppose you defined p_usrData like this:

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

Then when calling the API, you should pass the size of p_usrData instead of %size(USRI0300):

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

With these changes, you should see that the suppGrpIdx subfield correctly reflects the offset to the supplemental groups array.

Conclusion: Achieving the Correct Output

After implementing these changes, you should find that suppGrpIdx gives you meaningful data, thus allowing you to access the supplemental groups effectively. It's vital to ensure your API parameters accurately represent the structures you are working with to avoid these pitfalls.

Key Takeaway:

The phrase “make the receiver big enough” is crucial for successful API interaction. Always verify your data structure definitions and the passed parameter sizes to achieve the results you’re looking for.

In summary, addressing the size of your receiver variable and accurately passing the length parameter is essential when working with the QSYRUSRI API. By ensuring everything aligns properly, interacting with user profiles should yield fruitful results.