How To Fix ADT_TTYP019 - Unique Hashed

SAP Error Message - Details

• Message type: E = Error

• Message class: ADT_TTYP - ADT Table Type Editor

• Message number: 019

• Message text: Unique Hashed

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message ADT_TTYP019 - Unique Hashed ?

  The SAP error message ADT_TTYP019, which indicates "Unique Hashed," typically arises in the context of ABAP Dictionary or when working with data types in SAP. This error usually occurs when there is an attempt to define a hashed table or a unique key that does not comply with the requirements for uniqueness or hashing.
  Cause:
  
  Duplicate Keys: The most common cause of this error is that the key fields defined for a hashed table are not unique. In a hashed table, the key must be unique for each entry.
  Incorrect Data Type: The data type of the key fields may not be suitable for hashing.
  Table Definition Issues: There may be issues in the way the table or data structure is defined, such as incorrect field attributes or missing key definitions.
  
  Solution:
  
  Check Key Fields: Ensure that the key fields defined for the hashed table are unique. You can do this by reviewing the data that will be inserted into the table and ensuring that there are no duplicates.
  Review Data Types: Make sure that the data types of the key fields are appropriate for a hashed table. Typically, the key fields should be of a simple data type (like CHAR, NUMC, etc.) and not complex types.
  Modify Table Definition: If necessary, modify the table definition to ensure that the key fields are correctly defined and that they meet the requirements for a hashed table.
  Use Standard Tables: If uniqueness cannot be guaranteed, consider using a standard table instead of a hashed table, as standard tables do not require unique keys.
  
  Related Information:
  
  Hashed Tables: In ABAP, hashed tables are used for fast access to data based on unique keys. They are optimized for read operations where the key is known.
  ABAP Dictionary: The ABAP Dictionary is where you define database objects, including tables, views, and data elements. Understanding how to properly define these objects is crucial to avoid errors.
  Documentation: Refer to the SAP Help Portal or ABAP documentation for more detailed information on defining tables and the specific requirements for hashed tables.
  
  If you continue to experience issues after checking these areas, consider consulting with a colleague or reaching out to SAP support for further assistance.