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Home arrow Tips and Tricks arrow ABAP Reports arrow Select vs. Select *
Select vs. Select * PDF Print E-mail
User Rating: / 1
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Written by Anon.   
Saturday, 10 March 2007
Using Select field1 field2 ….. instead of Select * is significantly faster if the table contains a large number of fields

Example:
 
SELECT MATNR WERKS DISMM FROM MARC
       INTO TABLE T_MARC
       WHERE MATNR IN O_MATNR.

SELECT * FROM MARC
       INTO TABLE T_MARC
       WHERE MATNR IN O_MATNR.

Recommendation:
  • Use Select <field>:
  • Table consists of a large number of fields
  • Data retrieval is limited to a relatively small number of fields compared to overall number of fields. Hence, less memory usage and network load.
  • Use of Select * should be used on an exception basis ONLY.

ALSO

Example:
 
DO

SELECT MATNR WERKS DISMM FROM MARC
       INTO TABLE T_MARC
       WHERE MATNR IN O_MATNR.

DON'T

SELECT MATNR WERKS DISMM FROM MARC
       INTO CORRESPONDING FIELD OF TABLE T_MARC
       WHERE MATNR IN O_MATNR.
 

 


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