How To Fix SDDL_PARSER_MSG029 - GROUP BY must not contain any LOB columns

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 029

• Message text: GROUP BY must not contain any LOB columns

What causes this issue?

The columns specified after GROUP BY cannot have the type STRING,
RAWSTRING, LCHR, or LRAW.
Elements with these ABAP Dictionary data types are known as LOBs (Large
Objects).

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG029 - GROUP BY must not contain any LOB columns ?

  The SAP error message SDDL_PARSER_MSG029 indicates that there is an issue with a SQL query that is attempting to use a GROUP BY clause that includes LOB (Large Object) columns. In SAP HANA and other SQL databases, LOB columns (such as BLOBs for binary data or CLOBs for character data) cannot be used in GROUP BY clauses because they are not suitable for aggregation or grouping operations.
  Cause
  The error occurs when:
  
  A SQL query is written that includes LOB columns in the GROUP BY clause.
  LOB columns are typically used for storing large amounts of data, and SQL databases do not support grouping by these types of columns.
  
  Solution
  To resolve this error, you should:
  
  
  Remove LOB Columns from the GROUP BY Clause: Modify your SQL query to exclude any LOB columns from the GROUP BY clause. Only include columns that are suitable for grouping, such as integers, strings, or dates.
  For example, if your original query looks like this:
  SELECT column1, column2, LOB_column
  FROM your_table
  GROUP BY column1, LOB_column;
  You should change it to:
  SELECT column1, column2
  FROM your_table
  GROUP BY column1;
  
  
  Use Aggregation Functions: If you need to include LOB data in your results, consider using aggregation functions (like MAX, MIN, etc.) on non-LOB columns and handle LOB columns separately, if necessary.
  
  
  Review Query Logic: Ensure that the logic of your query aligns with your data requirements. If you need to group by certain attributes, make sure those attributes are appropriate for grouping.
  
  
  Related Information
  
  LOB Data Types: Understand the types of LOB columns in your database (e.g., CLOB, BLOB) and their limitations in SQL operations.
  SQL Aggregation: Familiarize yourself with SQL aggregation functions and how they can be used to summarize data without including LOB columns in the GROUP BY clause.
  SAP HANA Documentation: Refer to the official SAP HANA documentation for more details on SQL syntax and restrictions related to LOB columns and grouping.
  
  By following these steps, you should be able to resolve the error and successfully execute your SQL query.