ABAP Select data from SAP table AVWPAKTI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AVWPAKTI 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 AVWPAKTI. 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 AVWPAKTI 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_AVWPAKTI TYPE STANDARD TABLE OF AVWPAKTI,
      WA_AVWPAKTI TYPE AVWPAKTI,
      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: <AVWPAKTI> TYPE AVWPAKTI.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AVWPAKTI
*  INTO TABLE @DATA(IT_AVWPAKTI2).
*--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_AVWPAKTI INDEX 1 INTO DATA(WA_AVWPAKTI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AVWPAKTI>-MANDT = 1.
<AVWPAKTI>-RANL = 1.
<AVWPAKTI>-SANLF = 1.
<AVWPAKTI>-AAAAKTIE = 1.
<AVWPAKTI>-PDIVBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AVWPAKTI-SAKAR, sy-vline,
  WA_AVWPAKTI-DEBEG, sy-vline,
  WA_AVWPAKTI-SVBRE, sy-vline,
  WA_AVWPAKTI-SSRBE, sy-vline,
  WA_AVWPAKTI-BNEWE, sy-vline,
  WA_AVWPAKTI-PAKTQUO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AVWPAKTI 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_AVWPAKTI 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_AVWPAKTI INTO WA_AVWPAKTI.


*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 RANL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AVWPAKTI-RANL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVWPAKTI-RANL.
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_AVWPAKTI_STR, 
MANDT TYPE STRING,
RANL TYPE STRING,
SANLF TYPE STRING,
AAAAKTIE TYPE STRING,
PDIVBER TYPE STRING,
SAKAR TYPE STRING,
DEBEG TYPE STRING,
SVBRE TYPE STRING,
SSRBE TYPE STRING,
BNEWE TYPE STRING,
PAKTQUO TYPE STRING,
SAING TYPE STRING,
SFOTY TYPE STRING,
SOEFF TYPE STRING,
PAUSG TYPE STRING,
SARTBET TYPE STRING,
SKONBET TYPE STRING,
SFOART TYPE STRING,
BFONVOL TYPE STRING,
KBNEWE TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AVWPAKTI_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_AVWPAKTI_STR-MANDT sy-vline 
WA_AVWPAKTI_STR-RANL sy-vline 
WA_AVWPAKTI_STR-SANLF sy-vline 
WA_AVWPAKTI_STR-AAAAKTIE sy-vline 
WA_AVWPAKTI_STR-PDIVBER sy-vline 
WA_AVWPAKTI_STR-SAKAR sy-vline 
WA_AVWPAKTI_STR-DEBEG sy-vline 
WA_AVWPAKTI_STR-SVBRE sy-vline 
WA_AVWPAKTI_STR-SSRBE sy-vline 
WA_AVWPAKTI_STR-BNEWE sy-vline 
WA_AVWPAKTI_STR-PAKTQUO sy-vline 
WA_AVWPAKTI_STR-SAING sy-vline 
WA_AVWPAKTI_STR-SFOTY sy-vline 
WA_AVWPAKTI_STR-SOEFF sy-vline 
WA_AVWPAKTI_STR-PAUSG sy-vline 
WA_AVWPAKTI_STR-SARTBET sy-vline 
WA_AVWPAKTI_STR-SKONBET sy-vline 
WA_AVWPAKTI_STR-SFOART sy-vline 
WA_AVWPAKTI_STR-BFONVOL sy-vline 
WA_AVWPAKTI_STR-KBNEWE sy-vline 
WA_AVWPAKTI_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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