How To Fix RS_HCPR_MODEL030 - Temporal join: Left outer chains are not allowed (&1)

RS_HCPR_MODEL030 - Overview

• Message type: E = Error

• Message class: RS_HCPR_MODEL - Messages related to the HANA Composite Provider Backend

• Message number: 030

• Message text: Temporal join: Left outer chains are not allowed (&1)

What causes this issue?

The CompositeProvider consists of at least two left outer joined
PartProviders. The join partners of one of these left outer joined
PartProviders belong to another left outer joined PartProvider. This is
not allowed.
The join partners of a left outer joined PartProvider must belong to an
inner joined PartProvider.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

RS_HCPR_MODEL030 - Details

• The SAP error message RS_HCPR_MODEL030, which states "Temporal join: Left outer chains are not allowed (&1)," typically occurs in the context of SAP HANA or SAP BW when working with data models that involve temporal joins. This error indicates that there is an issue with the way the temporal join is defined in your data model.
  
  Cause:
  The error arises when you attempt to create a temporal join that includes a left outer join in a chain of joins. In SAP HANA, temporal joins are used to combine data from different time periods, but they have specific requirements regarding the types of joins that can be used. Specifically, left outer joins are not permitted in a chain of temporal joins because they can lead to ambiguous results and inconsistencies in the temporal data.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Join Logic: Examine the data model and the specific