ABAP Select data from SAP table BWESTA_ERCHZ into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP BWESTA_ERCHZ 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_ERCHZ. 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_ERCHZ 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_ERCHZ TYPE STANDARD TABLE OF BWESTA_ERCHZ,
      WA_BWESTA_ERCHZ TYPE BWESTA_ERCHZ,
      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_ERCHZ> TYPE BWESTA_ERCHZ.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BWESTA_ERCHZ
*  INTO TABLE @DATA(IT_BWESTA_ERCHZ2).
*--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_ERCHZ INDEX 1 INTO DATA(WA_BWESTA_ERCHZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BWESTA_ERCHZ>-BELZEILE = 1.
<BWESTA_ERCHZ>-BELZART = 1.
<BWESTA_ERCHZ>-AKLASSE = 1.
<BWESTA_ERCHZ>-BRANCHE = 1.
<BWESTA_ERCHZ>-TVORG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BWESTA_ERCHZ-SAISON, sy-vline,
  WA_BWESTA_ERCHZ-FRAN_TYPE, sy-vline,
  WA_BWESTA_ERCHZ-KONZIGR, sy-vline,
  WA_BWESTA_ERCHZ-OUCONTRACT, sy-vline,
  WA_BWESTA_ERCHZ-TARIFTYP, sy-vline,
  WA_BWESTA_ERCHZ-STATTART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BWESTA_ERCHZ 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_ERCHZ 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_ERCHZ INTO WA_BWESTA_ERCHZ.


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

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

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

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

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

*Conversion exit CUNIT, internal->external for field MASSBILL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BWESTA_ERCHZ-MASSBILL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWESTA_ERCHZ-MASSBILL.
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_ERCHZ_STR, 
BELZEILE TYPE STRING,
BELZART TYPE STRING,
AKLASSE TYPE STRING,
BRANCHE TYPE STRING,
TVORG TYPE STRING,
SAISON TYPE STRING,
FRAN_TYPE TYPE STRING,
KONZIGR TYPE STRING,
OUCONTRACT TYPE STRING,
TARIFTYP TYPE STRING,
STATTART TYPE STRING,
TARIFNR TYPE STRING,
KONDIGR TYPE STRING,
STTARIF TYPE STRING,
TEMP_AREA TYPE STRING,
DRCKSTUF TYPE STRING,
VBRMONAT TYPE STRING,
INTLENGTH TYPE STRING,
AB TYPE STRING,
BIS TYPE STRING,
DIFFKZ TYPE STRING,
BUCHREL TYPE STRING,
STGRQNT TYPE STRING,
STGRAMT TYPE STRING,
ARTMENGE TYPE STRING,
GSBER TYPE STRING,
KOSTL TYPE STRING,
KOKRS TYPE STRING,
PRCTR TYPE STRING,
PS_PSP_PNR TYPE STRING,
AUFNR TYPE STRING,
WAERS TYPE STRING,
MASSBILL TYPE STRING,
BETRAG TYPE STRING,
MENGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BWESTA_ERCHZ_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_ERCHZ_STR-BELZEILE sy-vline 
WA_BWESTA_ERCHZ_STR-BELZART sy-vline 
WA_BWESTA_ERCHZ_STR-AKLASSE sy-vline 
WA_BWESTA_ERCHZ_STR-BRANCHE sy-vline 
WA_BWESTA_ERCHZ_STR-TVORG sy-vline 
WA_BWESTA_ERCHZ_STR-SAISON sy-vline 
WA_BWESTA_ERCHZ_STR-FRAN_TYPE sy-vline 
WA_BWESTA_ERCHZ_STR-KONZIGR sy-vline 
WA_BWESTA_ERCHZ_STR-OUCONTRACT sy-vline 
WA_BWESTA_ERCHZ_STR-TARIFTYP sy-vline 
WA_BWESTA_ERCHZ_STR-STATTART sy-vline 
WA_BWESTA_ERCHZ_STR-TARIFNR sy-vline 
WA_BWESTA_ERCHZ_STR-KONDIGR sy-vline 
WA_BWESTA_ERCHZ_STR-STTARIF sy-vline 
WA_BWESTA_ERCHZ_STR-TEMP_AREA sy-vline 
WA_BWESTA_ERCHZ_STR-DRCKSTUF sy-vline 
WA_BWESTA_ERCHZ_STR-VBRMONAT sy-vline 
WA_BWESTA_ERCHZ_STR-INTLENGTH sy-vline 
WA_BWESTA_ERCHZ_STR-AB sy-vline 
WA_BWESTA_ERCHZ_STR-BIS sy-vline 
WA_BWESTA_ERCHZ_STR-DIFFKZ sy-vline 
WA_BWESTA_ERCHZ_STR-BUCHREL sy-vline 
WA_BWESTA_ERCHZ_STR-STGRQNT sy-vline 
WA_BWESTA_ERCHZ_STR-STGRAMT sy-vline 
WA_BWESTA_ERCHZ_STR-ARTMENGE sy-vline 
WA_BWESTA_ERCHZ_STR-GSBER sy-vline 
WA_BWESTA_ERCHZ_STR-KOSTL sy-vline 
WA_BWESTA_ERCHZ_STR-KOKRS sy-vline 
WA_BWESTA_ERCHZ_STR-PRCTR sy-vline 
WA_BWESTA_ERCHZ_STR-PS_PSP_PNR sy-vline 
WA_BWESTA_ERCHZ_STR-AUFNR sy-vline 
WA_BWESTA_ERCHZ_STR-WAERS sy-vline 
WA_BWESTA_ERCHZ_STR-MASSBILL sy-vline 
WA_BWESTA_ERCHZ_STR-BETRAG sy-vline 
WA_BWESTA_ERCHZ_STR-MENGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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