huang850625
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source:http://sapport.blogspot.com/2010/03/if-1-equals-2-whats-purpose.html
While debugging standard SAP ABAP code you might find for first look very strange code like following:
If 1 EQ 2.
MESSAGE W001(z100).
* plus do something else
EndIf.
Confusing? Of course! Based on the math this statement cannot be ever true. Then why do we need such an IF statement?
Actually there are certain situations when we need it. Just to name few of them. We need to make visible some parts of code which must not be executed under any circumstances. In this case we put it to such an IF. This can be make traceable usage of such a statement. E.g. message created in message’s transaction (TA SE91). In this way we just create reference point to “Where used” functionality of specific message. In case we would like to see where particular message 001 from message class Z100 is used we can achieve it. In general by this technique we can enhance ABAP code maintainability in larger scale.
This technique is often used in BW area as well. E.g. in data extraction ABAP function modules. See function modules called RSAX_BIW_GET_DATA_SIMPLE.
While debugging standard SAP ABAP code you might find for first look very strange code like following:
If 1 EQ 2.
MESSAGE W001(z100).
* plus do something else
EndIf.
Confusing? Of course! Based on the math this statement cannot be ever true. Then why do we need such an IF statement?
Actually there are certain situations when we need it. Just to name few of them. We need to make visible some parts of code which must not be executed under any circumstances. In this case we put it to such an IF. This can be make traceable usage of such a statement. E.g. message created in message’s transaction (TA SE91). In this way we just create reference point to “Where used” functionality of specific message. In case we would like to see where particular message 001 from message class Z100 is used we can achieve it. In general by this technique we can enhance ABAP code maintainability in larger scale.
This technique is often used in BW area as well. E.g. in data extraction ABAP function modules. See function modules called RSAX_BIW_GET_DATA_SIMPLE.
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DISABLE button(FCODE) from the GUI-Status
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Handy SAP function module to automate user events
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set Billing block to blank for Sals Order
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set Billing block to blank for Sals Order
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Unpermitted combination of business object BUS2032 and sales doc. category H
2013-01-25 14:20 4135Q: create New Sales Order using ... -
Function Module: get all users who have specific role
2013-01-25 14:16 679CALL FUNCTION 'RSRA_USERS_O ... -
Create a SELECT-OPTIONS in a module pool screen
2012-03-07 15:35 1026source:http://abap-explorer.blo ... -
Converting OTF data from script to Spool Request
2012-03-06 17:25 0source:http://forums.sdn.sap.co ... -
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2011-11-29 10:39 2064from: http://help-sap.blogspot. ... -
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2011-10-27 13:43 1310You cannot create append str ... -
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