ABAP Select data from SAP table BWESTA_ADD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BWESTA_ADD
*  INTO TABLE @DATA(IT_BWESTA_ADD2).
*--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_BWESTA_ADD INDEX 1 INTO DATA(WA_BWESTA_ADD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BWESTA_ADD>-ANLAGE = 1.
<BWESTA_ADD>-ANLART = 1.
<BWESTA_ADD>-SPEBENE = 1.
<BWESTA_ADD>-EIGENVERBR = 1.
<BWESTA_ADD>-STAGRUVER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BWESTA_ADD-STAFO, sy-vline,
  WA_BWESTA_ADD-CITY_CODE, sy-vline,
  WA_BWESTA_ADD-CITYP_CODE, sy-vline,
  WA_BWESTA_ADD-STREETCODE, sy-vline,
  WA_BWESTA_ADD-COUNTRY, sy-vline,
  WA_BWESTA_ADD-REGION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BWESTA_ADD 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_BWESTA_ADD 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_BWESTA_ADD INTO WA_BWESTA_ADD.


*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 ANLAGE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWESTA_ADD-ANLAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWESTA_ADD-ANLAGE.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field CONTRACTCLASS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWESTA_ADD-CONTRACTCLASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWESTA_ADD-CONTRACTCLASS.
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_BWESTA_ADD_STR, 
ANLAGE TYPE STRING,
ANLART TYPE STRING,
SPEBENE TYPE STRING,
EIGENVERBR TYPE STRING,
STAGRUVER TYPE STRING,
STAFO TYPE STRING,
CITY_CODE TYPE STRING,
CITYP_CODE TYPE STRING,
STREETCODE TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
REGPOLIT TYPE STRING,
REGIOGROUP TYPE STRING,
SERVICEID TYPE STRING,
SALESEMPLOYEE TYPE STRING,
SALESPARTNER TYPE STRING,
SALESDOCUMENT TYPE STRING,
CONTRACTCLASS TYPE STRING,
RULEGR TYPE STRING,
INT_UI_BW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BWESTA_ADD_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_BWESTA_ADD_STR-ANLAGE sy-vline 
WA_BWESTA_ADD_STR-ANLART sy-vline 
WA_BWESTA_ADD_STR-SPEBENE sy-vline 
WA_BWESTA_ADD_STR-EIGENVERBR sy-vline 
WA_BWESTA_ADD_STR-STAGRUVER sy-vline 
WA_BWESTA_ADD_STR-STAFO sy-vline 
WA_BWESTA_ADD_STR-CITY_CODE sy-vline 
WA_BWESTA_ADD_STR-CITYP_CODE sy-vline 
WA_BWESTA_ADD_STR-STREETCODE sy-vline 
WA_BWESTA_ADD_STR-COUNTRY sy-vline 
WA_BWESTA_ADD_STR-REGION sy-vline 
WA_BWESTA_ADD_STR-REGPOLIT sy-vline 
WA_BWESTA_ADD_STR-REGIOGROUP sy-vline 
WA_BWESTA_ADD_STR-SERVICEID sy-vline 
WA_BWESTA_ADD_STR-SALESEMPLOYEE sy-vline 
WA_BWESTA_ADD_STR-SALESPARTNER sy-vline 
WA_BWESTA_ADD_STR-SALESDOCUMENT sy-vline 
WA_BWESTA_ADD_STR-CONTRACTCLASS sy-vline 
WA_BWESTA_ADD_STR-RULEGR sy-vline 
WA_BWESTA_ADD_STR-INT_UI_BW sy-vline      INTO ld_text SEPARATED BY SPACE.

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