SAP ABAP DUMP GETWA_ NOT_ Assigned pointer unassigned error

SAP ABAP DUMP GETWA_NOT_ASSIGNED Pointer unallocated error

Preface

Yesterday, the business side responded SAC The data of is not updated

The steamed bread is checked BW The merge layer in the processing chain executes incorrectly

The reason for checking is the conversion process DUMP 了

Field symbol has not been assigned yet. Pointer field is not assigned

This mistake is easy to understand , I have met many times before

But this time DUMP At first, the reason was really a little unexpected

I have been watching it for a long time Only then discovered the code loopholes written at that time

Problem description

Use LOOP loop result_package And assign it to the pointer <result_fields> This is a ABAP for HANA A common way of writing in

But it's just LOOP At the middle code of DUMP It fell off

It's hard to understand

LOOP AT result_package ASSIGNING <result_fields> .
* ...
    IF <result_fields>-field IS INITIAL. " DUMP Field symbol has not been assigned yet.
        " ...
    ENDIF.
ENDLOOP.

Try to catch exceptions

At first, the cause of the problem was not found

So steamed bun thought that I should be able to catch this anomaly

The result was unexpected failure

Program DUMP still

LOOP AT result_package ASSIGNING <result_fields> .
* ...
    TRY.
        IF <result_fields>-field IS INITIAL. " DUMP Field symbol has not been assigned yet.
            " ...
        ENDIF.
    CATCH cx_root INTO DATA(lcx_root).
    ENDTRY.
ENDLOOP.

It turned out to be a strange piece of code

Failed to resolve by catching exceptions , Then you can only read the code carefully ……

Finally found a strange code

DELETE result_package. This line of code means that if some of the previous conditions are not met , Then I don't need this line of data , Just delete from the result .

You can delete , But it's not time to execute subsequent code ……

I must have fallen asleep

Or hungry

LOOP AT result_package ASSIGNING <result_fields> .
* ...
    IF xxx.
        IF.

        ELSEIF.                          "  These are the groundwork 

        ELSE.
            DELETE result_package.       "  That's the problem 
        ENDIF.
    ENDIF.

    IF <result_fields>-field IS INITIAL. " DUMP Field symbol has not been assigned yet.
        " ...
    ENDIF.

ENDLOOP.

Problem solving

It's simple , Add CONTINUE Just fine

LOOP AT result_package ASSIGNING <result_fields> .
* ...
    IF xxx.
        IF.

        ELSEIF.                          "  These are the groundwork 

        ELSE.
            DELETE result_package.       "  That's the problem 
            CONTINUE.                    " Great
        ENDIF.
    ENDIF.

    IF <result_fields>-field IS INITIAL. " DUMP Field symbol has not been assigned yet.
        " ...
    ENDIF.

ENDLOOP.