What is secondary table index in SAP BC-ABA - ABAP Runtime Environment?

SAP Term: secondary table index

• Component: BC-ABA

• Component Name: ABAP Runtime Environment

• Description: A table index for the administration of sorted secondary table keys. A secondary table index of a non-unique key is not updated instantly after a row is added to, or deleted from, an internal table. It is only updated when the internal table is accessed using the associated secondary key.

Smart SAP Assistant

• Key Concepts: 
  Secondary table index is a feature of the ABAP Runtime Environment in SAP that allows for faster access to data stored in database tables. It is an index that is created on a secondary table and is used to speed up the retrieval of data from the primary table. The secondary table index is created by the system and can be used to access data from the primary table without having to perform a full table scan. 
  
  How to use it: 
  In order to use the secondary table index, you must first create an index on the secondary table. This can be done by using the ABAP command CREATE INDEX. Once the index has been created, you can then use it to access data from the primary table. The index can be used in conjunction with other search criteria such as selection criteria or join conditions. 
  
  Tips & Tricks: 
  When creating a secondary table index, it is important to consider the size of the data set that will be accessed. If the data set is large, then it may be beneficial to create multiple indexes on different columns in order to optimize performance. Additionally, it is important to consider how often the data will be accessed when creating an index as this will determine how often the index needs to be updated. 
  
  Related Information: 
  For more information about secondary table indexes, please refer to SAP Help documentation at https://help.sap.com/viewer/product/ABAP_RUNTIME_ENVIRONMENT/7.50/en-US