How To Fix DDLS156 - An alias must be specified for literals (here &) in the selection list

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 156

• Message text: An alias must be specified for literals (here &) in the selection list

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS156 - An alias must be specified for literals (here &) in the selection list ?

  The SAP error message DDLS156 indicates that there is an issue with the SQL statement in your ABAP program or database view where a literal value is being used without an alias in the selection list. This typically occurs when you are trying to select a literal value (like a constant or a string) in a SQL query, and the system requires that you provide an alias for that literal.
  Cause:
  The error arises when you have a SQL statement that includes a literal value without an accompanying alias. For example, if you have a SELECT statement that looks like this:
  SELECT 'Some Value' FROM ...
  This will trigger the error because the literal 'Some Value' does not have an alias. The SQL parser requires that every column in the selection list has a name (alias) to identify it.
  Solution:
  To resolve this error, you need to provide an alias for the literal value in your SQL statement. You can do this by using the AS keyword followed by the alias name. Here’s how you can modify the SQL statement:
  SELECT 'Some Value' AS my_alias FROM ...
  In this example, my_alias is the alias for the literal value 'Some Value'. This way, the SQL parser can identify the literal in the result set.
  Related Information:
  
  ABAP SQL Syntax: When writing SQL statements in ABAP, always ensure that every selected column, including literals, has a corresponding alias.
  Debugging: If you encounter this error, check all your SELECT statements for any literals that might be missing aliases.
  Documentation: Refer to the SAP documentation for more details on SQL syntax and best practices in ABAP programming.
  
  By following these guidelines, you should be able to resolve the DDLS156 error and ensure that your SQL statements are correctly formatted.