ABAP Select data from SAP table ANW4 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ANW4 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 ANW4. 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 ANW4 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_ANW4 TYPE STANDARD TABLE OF ANW4,
      WA_ANW4 TYPE ANW4,
      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: <ANW4> TYPE ANW4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ANW4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ANW4
  INTO TABLE IT_ANW4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ANW4
*  INTO TABLE @DATA(IT_ANW42).
*--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_ANW4 INDEX 1 INTO DATA(WA_ANW42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ANW4 ASSIGNING <ANW4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ANW4>-AFABE = 1.
<ANW4>-AFBKTX = 1.
<ANW4>-KANSW = 1.
<ANW4>-KANZA = 1.
<ANW4>-KAUFW = 1.

ENDLOOP.

LOOP AT IT_ANW4 INTO WA_ANW4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ANW4-KINVZ, sy-vline,
  WA_ANW4-KNAFA, sy-vline,
  WA_ANW4-KSAFA, sy-vline,
  WA_ANW4-KAAFA, sy-vline,
  WA_ANW4-KMAFA, sy-vline,
  WA_ANW4-KAUFN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ANW4 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_ANW4 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_ANW4 INTO WA_ANW4.


*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 AC132, internal->external for field KANSW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-KANSW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-KANSW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field KANZA
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-KANZA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-KANZA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field KAUFW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-KAUFW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-KAUFW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field KINVZ
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-KINVZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-KINVZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field KNAFA
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-KNAFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-KNAFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field KSAFA
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-KSAFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-KSAFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field KAAFA
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-KAAFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-KAAFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field KMAFA
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-KMAFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-KMAFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field KAUFN
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-KAUFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-KAUFN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field KZINW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-KZINW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-KZINW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field AUFWB
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-AUFWB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-AUFWB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field NAFAG
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-NAFAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-NAFAG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field SAFAG
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-SAFAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-SAFAG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field AAFAG
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-AAFAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-AAFAG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field MAFAG
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-MAFAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-MAFAG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ZINSG
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-ZINSG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-ZINSG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field AUFNG
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-AUFNG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-AUFNG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ANSWRT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-ANSWRT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-ANSWRT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field RESTWRT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-RESTWRT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-RESTWRT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field BUCHWRT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-BUCHWRT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-BUCHWRT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ANBTR
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ANW4-ANBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ANW4-ANBTR.
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_ANW4_STR, 
AFABE TYPE STRING,
AFBKTX TYPE STRING,
KANSW TYPE STRING,
KANZA TYPE STRING,
KAUFW TYPE STRING,
KINVZ TYPE STRING,
KNAFA TYPE STRING,
KSAFA TYPE STRING,
KAAFA TYPE STRING,
KMAFA TYPE STRING,
KAUFN TYPE STRING,
KZINW TYPE STRING,
AUFWB TYPE STRING,
NAFAG TYPE STRING,
SAFAG TYPE STRING,
AAFAG TYPE STRING,
MAFAG TYPE STRING,
ZINSG TYPE STRING,
AUFNG TYPE STRING,
ANSWRT TYPE STRING,
RESTWRT TYPE STRING,
BUCHWRT TYPE STRING,
ANBTR TYPE STRING,
BWASL TYPE STRING,
BZDAT TYPE STRING,
WAERS TYPE STRING,
INDEX TYPE STRING,
AFBLPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ANW4_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_ANW4_STR-AFABE sy-vline 
WA_ANW4_STR-AFBKTX sy-vline 
WA_ANW4_STR-KANSW sy-vline 
WA_ANW4_STR-KANZA sy-vline 
WA_ANW4_STR-KAUFW sy-vline 
WA_ANW4_STR-KINVZ sy-vline 
WA_ANW4_STR-KNAFA sy-vline 
WA_ANW4_STR-KSAFA sy-vline 
WA_ANW4_STR-KAAFA sy-vline 
WA_ANW4_STR-KMAFA sy-vline 
WA_ANW4_STR-KAUFN sy-vline 
WA_ANW4_STR-KZINW sy-vline 
WA_ANW4_STR-AUFWB sy-vline 
WA_ANW4_STR-NAFAG sy-vline 
WA_ANW4_STR-SAFAG sy-vline 
WA_ANW4_STR-AAFAG sy-vline 
WA_ANW4_STR-MAFAG sy-vline 
WA_ANW4_STR-ZINSG sy-vline 
WA_ANW4_STR-AUFNG sy-vline 
WA_ANW4_STR-ANSWRT sy-vline 
WA_ANW4_STR-RESTWRT sy-vline 
WA_ANW4_STR-BUCHWRT sy-vline 
WA_ANW4_STR-ANBTR sy-vline 
WA_ANW4_STR-BWASL sy-vline 
WA_ANW4_STR-BZDAT sy-vline 
WA_ANW4_STR-WAERS sy-vline 
WA_ANW4_STR-INDEX sy-vline 
WA_ANW4_STR-AFBLPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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