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Home arrow Tips and Tricks arrow ABAP Reports arrow Data Retrieval bypassing SAP DB buffer
Data Retrieval bypassing SAP DB buffer PDF Print E-mail
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Written by Anon.   
Tuesday, 13 March 2007
Some extensions / versions of the SELECT statement don't support usage of SAPs internal database buffer.  This causes additional unnecessary database accesses. Here's a list of all this statements:
  • Usage of SELECT FOR UPDATE
  • Usage of ORDER BY  with sort sequence differing from the primary key
  • Usage of SELECT COUNT(*)
  • Usage of aggregate functions (AVG, MAX, MIN, SUM)
  • Elimination of duplicates (DISTINCT)
  • Conditions for IS [NOT] NULL
  • Usage of SELECT SINGLE without specifying complete primary key in WHERE condition
  • Usage of GROUP BY or HAVING clauses
  • Usage of Subqueries
  • Usage of Joins
  • Usage of Native SQL


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