How To Fix ADT_TTYP020 - Unique Sorted

SAP Error Message - Details

• Message type: E = Error

• Message class: ADT_TTYP - ADT Table Type Editor

• Message number: 020

• Message text: Unique Sorted

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ADT_TTYP020 - Unique Sorted ?

  The SAP error message ADT_TTYP020 with the description "Unique Sorted" typically occurs in the context of ABAP development, particularly when dealing with internal tables. This error indicates that there is an issue with the definition or usage of an internal table that is expected to be unique and sorted, but the data being processed does not meet these criteria.
  Cause:
  
  Data Duplication: The internal table is defined as a unique sorted table, but the data being inserted contains duplicates.
  Incorrect Table Definition: The internal table may not be defined correctly in terms of its key fields, leading to conflicts when trying to maintain uniqueness.
  Sorting Issues: The data may not be sorted correctly according to the defined key fields, which is a requirement for unique sorted tables.
  
  Solution:
  
  
  Check Data for Duplicates: Before inserting data into the internal table, ensure that there are no duplicate entries. You can use the DELETE ADJACENT DUPLICATES statement to remove duplicates from the internal table.
  DELETE ADJACENT DUPLICATES FROM your_table COMPARING key_field1 key_field2.
  
  
  Review Table Definition: Ensure that the internal table is defined with the correct key fields. The key fields should uniquely identify each entry in the table.
  TYPES: BEGIN OF your_structure,
           key_field1 TYPE your_type,
           key_field2 TYPE your_type,
           ...
         END OF your_structure.
  
  DATA: your_table TYPE SORTED TABLE OF your_structure WITH UNIQUE KEY key_field1 key_field2.
  
  
  Sort the Table: If you are manually inserting data, ensure that the table is sorted according to the key fields after all entries have been added. You can use the SORT statement.
  SORT your_table BY key_field1 key_field2.
  
  
  Use Appropriate Data Types: Ensure that the data types of the key fields are appropriate and consistent across all entries.
  
  
  Related Information:
  
  Internal Tables in ABAP: Understanding the different types of internal tables (standard, sorted, hashed) and their characteristics is crucial for effective ABAP programming.
  Key Fields: The concept of key fields is essential when working with sorted and unique tables. Key fields determine how the data is organized and accessed.
  Error Handling: Implement error handling to catch and manage exceptions when working with internal tables, especially when performing operations that could lead to duplicates.
  
  By following these guidelines, you should be able to resolve the ADT_TTYP020 error and ensure that your internal tables are correctly defined and populated.