ABAP Select data from SAP table CWLFPERSSMTDOCWI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CWLFPERSSMTDOCWI table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to CWLFPERSSMTDOCWI. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the CWLFPERSSMTDOCWI table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_CWLFPERSSMTDOCWI TYPE STANDARD TABLE OF CWLFPERSSMTDOCWI,
      WA_CWLFPERSSMTDOCWI TYPE CWLFPERSSMTDOCWI,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <CWLFPERSSMTDOCWI> TYPE CWLFPERSSMTDOCWI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CWLFPERSSMTDOCWI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CWLFPERSSMTDOCWI
  INTO TABLE IT_CWLFPERSSMTDOCWI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CWLFPERSSMTDOCWI
*  INTO TABLE @DATA(IT_CWLFPERSSMTDOCWI2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_CWLFPERSSMTDOCWI INDEX 1 INTO DATA(WA_CWLFPERSSMTDOCWI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CWLFPERSSMTDOCWI ASSIGNING <CWLFPERSSMTDOCWI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CWLFPERSSMTDOCWI>-MANDT = 1.
<CWLFPERSSMTDOCWI>-WORKFLOWTASKINTERNALID = 1.
<CWLFPERSSMTDOCWI>-PERSONNELSETTLEMENTDOCUMENT = 1.
<CWLFPERSSMTDOCWI>-CREATEDBYUSER = 1.
<CWLFPERSSMTDOCWI>-USERFULLNAME = 1.

ENDLOOP.

LOOP AT IT_CWLFPERSSMTDOCWI INTO WA_CWLFPERSSMTDOCWI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CWLFPERSSMTDOCWI-PERSSETTLMTDOCCURRENCY, sy-vline,
  WA_CWLFPERSSMTDOCWI-TOTALNETAMOUNT, sy-vline,
  WA_CWLFPERSSMTDOCWI-COMPANYCODE, sy-vline,
  WA_CWLFPERSSMTDOCWI-PERSONWORKAGREEMENT, sy-vline,
  WA_CWLFPERSSMTDOCWI-SETTLMTDATE, sy-vline,
  WA_CWLFPERSSMTDOCWI-DOCUMENTDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CWLFPERSSMTDOCWI you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_CWLFPERSSMTDOCWI TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_CWLFPERSSMTDOCWI INTO WA_CWLFPERSSMTDOCWI.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field PERSONNELSETTLEMENTDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CWLFPERSSMTDOCWI-PERSONNELSETTLEMENTDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CWLFPERSSMTDOCWI-PERSONNELSETTLEMENTDOCUMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PERSONNELCOSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CWLFPERSSMTDOCWI-PERSONNELCOSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CWLFPERSSMTDOCWI-PERSONNELCOSTCENTER.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CWLFPERSSMTDOCWI_STR, 
MANDT TYPE STRING,
WORKFLOWTASKINTERNALID TYPE STRING,
PERSONNELSETTLEMENTDOCUMENT TYPE STRING,
CREATEDBYUSER TYPE STRING,
USERFULLNAME TYPE STRING,
PERSSETTLMTDOCCURRENCY TYPE STRING,
TOTALNETAMOUNT TYPE STRING,
COMPANYCODE TYPE STRING,
PERSONWORKAGREEMENT TYPE STRING,
SETTLMTDATE TYPE STRING,
DOCUMENTDATE TYPE STRING,
PERSONNELCOSTCENTER TYPE STRING,
SETTLMTCOMPENSATIONREASON TYPE STRING,
SETTLMTCOMPNVAR TYPE STRING,
DOCUMENTTITLE TYPE STRING,
SALESORGANIZATION TYPE STRING,
DISTRIBUTIONCHANNEL TYPE STRING,
DIVISION TYPE STRING,
SETTLMTDOCTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CWLFPERSSMTDOCWI_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_CWLFPERSSMTDOCWI_STR-MANDT sy-vline 
WA_CWLFPERSSMTDOCWI_STR-WORKFLOWTASKINTERNALID sy-vline 
WA_CWLFPERSSMTDOCWI_STR-PERSONNELSETTLEMENTDOCUMENT sy-vline 
WA_CWLFPERSSMTDOCWI_STR-CREATEDBYUSER sy-vline 
WA_CWLFPERSSMTDOCWI_STR-USERFULLNAME sy-vline 
WA_CWLFPERSSMTDOCWI_STR-PERSSETTLMTDOCCURRENCY sy-vline 
WA_CWLFPERSSMTDOCWI_STR-TOTALNETAMOUNT sy-vline 
WA_CWLFPERSSMTDOCWI_STR-COMPANYCODE sy-vline 
WA_CWLFPERSSMTDOCWI_STR-PERSONWORKAGREEMENT sy-vline 
WA_CWLFPERSSMTDOCWI_STR-SETTLMTDATE sy-vline 
WA_CWLFPERSSMTDOCWI_STR-DOCUMENTDATE sy-vline 
WA_CWLFPERSSMTDOCWI_STR-PERSONNELCOSTCENTER sy-vline 
WA_CWLFPERSSMTDOCWI_STR-SETTLMTCOMPENSATIONREASON sy-vline 
WA_CWLFPERSSMTDOCWI_STR-SETTLMTCOMPNVAR sy-vline 
WA_CWLFPERSSMTDOCWI_STR-DOCUMENTTITLE sy-vline 
WA_CWLFPERSSMTDOCWI_STR-SALESORGANIZATION sy-vline 
WA_CWLFPERSSMTDOCWI_STR-DISTRIBUTIONCHANNEL sy-vline 
WA_CWLFPERSSMTDOCWI_STR-DIVISION sy-vline 
WA_CWLFPERSSMTDOCWI_STR-SETTLMTDOCTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.