sas segmentation violation in task program

When processing in CAS, the BY groups are retained, but the order of rows within the BY group cannot be guaranteed.

However, the value of model is not the same each time I run the step in CAS. This output is the same each time I run this code in SAS 9.4. The output from running the step in SAS 9.4 shows the make in alphabetic order with the first model based on an alphabetic sort order, which is the original order of the data. The model that is associated with the make is different in the output that is created in CAS. Here is the output from both PRINT procedures, which are clearly not the same. I compare the output of running a DATA step using BY-group processing in SAS 9.4 to the output produced from running the exact same code in CAS.

In this example, I use the SASHELP.CARS data set. Here is an example of how the order of the data can be different when running a DATA step in CAS. Since the order is not guaranteed when running in CAS, results are almost assuredly different when you compare the output from running in SAS 9.4 to running in CAS. This reordering becomes very important when you use FIRST. This change in order can occur with or without a BY statement. However, because of the process by which CAS distributes and reassembles the data, the order of the data within each by group is not guaranteed. Each resulting BY group is maintained when distributing the code and data. When you use a BY statement in the DATA step that is running in CAS, the data is grouped by the unique values of the BY variable. CAS DATA step processing with a BY Statement The code that executes on each worker and thread is the same, but the portion of data is unique for that worker and thread. Source: SAS Help Center: Data Step Processing in CAS When a DATA step runs in CAS, CAS distributes the code and data across multiple workers and threads, as shown below: It is essential to understand how processing works when running a DATA step in CAS to avoid possible unexpected results. However, running a DATA step in CAS is different. In SAS 9.4, the order of your data remains constant when you run a DATA step with or without a BY statement.

how to achieve the same results in CAS by using the ADDROWID data set option, which was introduced in SAS® Viya®1ĭATA step processing with a BY statement in SAS 9.4 and CAS.

how the order of your data can differ when you run a DATA step with a BY statement in SAS®4 versus in CAS.

Sas segmentation violation in task program