ABAP Select data from SAP table TABW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TABW
*  INTO TABLE @DATA(IT_TABW2).
*--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_TABW INDEX 1 INTO DATA(WA_TABW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TABW>-MANDT = 1.
<TABW>-BWASL = 1.
<TABW>-BWAGRP = 1.
<TABW>-XVERGA = 1.
<TABW>-XAKTIV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TABW-XDEAKT, sy-vline,
  WA_TABW-XABGMM, sy-vline,
  WA_TABW-XERLOS, sy-vline,
  WA_TABW-XAVERB, sy-vline,
  WA_TABW-XABUCH, sy-vline,
  WA_TABW-BWAKON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TABW 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_TABW 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_TABW INTO WA_TABW.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_TABW_STR, 
MANDT TYPE STRING,
BWASL TYPE STRING,
BWAGRP TYPE STRING,
XVERGA TYPE STRING,
XAKTIV TYPE STRING,
XDEAKT TYPE STRING,
XABGMM TYPE STRING,
XERLOS TYPE STRING,
XAVERB TYPE STRING,
XABUCH TYPE STRING,
BWAKON TYPE STRING,
XPRJKT TYPE STRING,
ANSHKZ TYPE STRING,
BWASLG TYPE STRING,
BLART TYPE STRING,
XABINV TYPE STRING,
BWASLN TYPE STRING,
GITTGR TYPE STRING,
XABGWG TYPE STRING,
XABIMM TYPE STRING,
XUSBWA TYPE STRING,
XUMBHI TYPE STRING,
XIFREL TYPE STRING,
XCOOBJ TYPE STRING,
XCOPSP TYPE STRING,
XAVERBN TYPE STRING,
XZUGBR TYPE STRING,
XUMJA TYPE STRING,
RSN_CODE TYPE STRING,
XOBS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TABW_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_TABW_STR-MANDT sy-vline 
WA_TABW_STR-BWASL sy-vline 
WA_TABW_STR-BWAGRP sy-vline 
WA_TABW_STR-XVERGA sy-vline 
WA_TABW_STR-XAKTIV sy-vline 
WA_TABW_STR-XDEAKT sy-vline 
WA_TABW_STR-XABGMM sy-vline 
WA_TABW_STR-XERLOS sy-vline 
WA_TABW_STR-XAVERB sy-vline 
WA_TABW_STR-XABUCH sy-vline 
WA_TABW_STR-BWAKON sy-vline 
WA_TABW_STR-XPRJKT sy-vline 
WA_TABW_STR-ANSHKZ sy-vline 
WA_TABW_STR-BWASLG sy-vline 
WA_TABW_STR-BLART sy-vline 
WA_TABW_STR-XABINV sy-vline 
WA_TABW_STR-BWASLN sy-vline 
WA_TABW_STR-GITTGR sy-vline 
WA_TABW_STR-XABGWG sy-vline 
WA_TABW_STR-XABIMM sy-vline 
WA_TABW_STR-XUSBWA sy-vline 
WA_TABW_STR-XUMBHI sy-vline 
WA_TABW_STR-XIFREL sy-vline 
WA_TABW_STR-XCOOBJ sy-vline 
WA_TABW_STR-XCOPSP sy-vline 
WA_TABW_STR-XAVERBN sy-vline 
WA_TABW_STR-XZUGBR sy-vline 
WA_TABW_STR-XUMJA sy-vline 
WA_TABW_STR-RSN_CODE sy-vline 
WA_TABW_STR-XOBS sy-vline      INTO ld_text SEPARATED BY SPACE.

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