Rule Definition
When a the READ command is used without the BINARY SEARCH option, the internal table is sequentially searched (equivalent of an SQL table scan). The consequence is poor performance especially when the size of internal table is large or if it grows. Instead of this, it is recommended to use the BINARY SEARCH option. The binary search algorithm is much faster to search of a value in an internal table. It is however necessary to sort the internal table before doing a binary search in order to get that performance advantage.

Remediation
Add the BINARY SEARCH option to the statement and check that the internal table is sorted before using the READ statement.

Violation Code Sample

Example 1
READ TABLE int_fligh WITH KEY airln = 'AF'.

Example 2 
 LOOP AT itab INTO wa.
   READ myStandardTable INTO wa2 WITH KEY id = 1.
ENDLOOP.

Fixed Code Sample

Remediation Example 1
READ TABLE int_fligh WITH KEY airln = 'AF' BINARY SEARCH.

Remediation Example 2 
 LOOP AT itab INTO wa.
   READ myStandardTable INTO wa2 WITH KEY id = 1
   BINARY SEARCH.
ENDLOOP.

ABAP Objects, Keller-Kruger, SAP Press Enhancing the Quality of ABAP Development, Meijs-Krouwels-Heulmans-Sommen, SAP Press