ABAP Select data from SAP table BWTRM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BWTRM
*  INTO TABLE @DATA(IT_BWTRM2).
*--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_BWTRM INDEX 1 INTO DATA(WA_BWTRM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BWTRM>-MATNR = 1.
<BWTRM>-BWKEY = 1.
<BWTRM>-BWTAR = 1.
<BWTRM>-PSPNR = 1.
<BWTRM>-VBELN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BWTRM-POSNR, sy-vline,
  WA_BWTRM-VPRSV, sy-vline,
  WA_BWTRM-VERPR, sy-vline,
  WA_BWTRM-STPRS, sy-vline,
  WA_BWTRM-PEINH, sy-vline,
  WA_BWTRM-BKLAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BWTRM 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_BWTRM 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_BWTRM INTO WA_BWTRM.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_BWTRM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWTRM-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_BWTRM-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWTRM-PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWTRM-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWTRM-VBELN.
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_BWTRM_STR, 
MATNR TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
PSPNR TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
VPRSV TYPE STRING,
VERPR TYPE STRING,
STPRS TYPE STRING,
PEINH TYPE STRING,
BKLAS TYPE STRING,
VMVPR TYPE STRING,
VMVER TYPE STRING,
VMSTP TYPE STRING,
VMPEI TYPE STRING,
VMBKL TYPE STRING,
VJVPR TYPE STRING,
VJVER TYPE STRING,
VJSTP TYPE STRING,
VJPEI TYPE STRING,
VJBKL TYPE STRING,
BWTTY TYPE STRING,
EKLAS TYPE STRING,
QKLAS TYPE STRING,
KALN1 TYPE STRING,
LVORM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BWTRM_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_BWTRM_STR-MATNR sy-vline 
WA_BWTRM_STR-BWKEY sy-vline 
WA_BWTRM_STR-BWTAR sy-vline 
WA_BWTRM_STR-PSPNR sy-vline 
WA_BWTRM_STR-VBELN sy-vline 
WA_BWTRM_STR-POSNR sy-vline 
WA_BWTRM_STR-VPRSV sy-vline 
WA_BWTRM_STR-VERPR sy-vline 
WA_BWTRM_STR-STPRS sy-vline 
WA_BWTRM_STR-PEINH sy-vline 
WA_BWTRM_STR-BKLAS sy-vline 
WA_BWTRM_STR-VMVPR sy-vline 
WA_BWTRM_STR-VMVER sy-vline 
WA_BWTRM_STR-VMSTP sy-vline 
WA_BWTRM_STR-VMPEI sy-vline 
WA_BWTRM_STR-VMBKL sy-vline 
WA_BWTRM_STR-VJVPR sy-vline 
WA_BWTRM_STR-VJVER sy-vline 
WA_BWTRM_STR-VJSTP sy-vline 
WA_BWTRM_STR-VJPEI sy-vline 
WA_BWTRM_STR-VJBKL sy-vline 
WA_BWTRM_STR-BWTTY sy-vline 
WA_BWTRM_STR-EKLAS sy-vline 
WA_BWTRM_STR-QKLAS sy-vline 
WA_BWTRM_STR-KALN1 sy-vline 
WA_BWTRM_STR-LVORM sy-vline      INTO ld_text SEPARATED BY SPACE.

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