ABAP Select data from SAP table BAPI_RE_PRESTAGE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI_RE_PRESTAGE
*  INTO TABLE @DATA(IT_BAPI_RE_PRESTAGE2).
*--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_BAPI_RE_PRESTAGE INDEX 1 INTO DATA(WA_BAPI_RE_PRESTAGE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI_RE_PRESTAGE>-OBJECT_TYPE = 1.
<BAPI_RE_PRESTAGE>-OBJECT_ID = 1.
<BAPI_RE_PRESTAGE>-SEQUENCE_NO = 1.
<BAPI_RE_PRESTAGE>-EXPENSE_ITEM = 1.
<BAPI_RE_PRESTAGE>-EXPENSE_SEQUENCE_NO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI_RE_PRESTAGE-ADJUST_SEQUENCE_NO, sy-vline,
  WA_BAPI_RE_PRESTAGE-ADJUST_OBJECT_TYPE, sy-vline,
  WA_BAPI_RE_PRESTAGE-ADJUST_OBJECT_ID, sy-vline,
  WA_BAPI_RE_PRESTAGE-USE_FOR_ADJUSTMENT, sy-vline,
  WA_BAPI_RE_PRESTAGE-IS_REJECTED, sy-vline,
  WA_BAPI_RE_PRESTAGE-ADJUST_REASON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPI_RE_PRESTAGE 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_BAPI_RE_PRESTAGE 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_BAPI_RE_PRESTAGE INTO WA_BAPI_RE_PRESTAGE.


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

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

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

*Conversion exit CUNIT, internal->external for field AMENITIES_LFA_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_RE_PRESTAGE-AMENITIES_LFA_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_RE_PRESTAGE-AMENITIES_LFA_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AREA_SIZE_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_RE_PRESTAGE-AREA_SIZE_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_RE_PRESTAGE-AREA_SIZE_UNIT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field REFERENCE_CONDITION_TYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_RE_PRESTAGE-REFERENCE_CONDITION_TYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_RE_PRESTAGE-REFERENCE_CONDITION_TYPE.
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_BAPI_RE_PRESTAGE_STR, 
OBJECT_TYPE TYPE STRING,
OBJECT_ID TYPE STRING,
SEQUENCE_NO TYPE STRING,
EXPENSE_ITEM TYPE STRING,
EXPENSE_SEQUENCE_NO TYPE STRING,
ADJUST_SEQUENCE_NO TYPE STRING,
ADJUST_OBJECT_TYPE TYPE STRING,
ADJUST_OBJECT_ID TYPE STRING,
USE_FOR_ADJUSTMENT TYPE STRING,
IS_REJECTED TYPE STRING,
ADJUST_REASON TYPE STRING,
ADJUST_REASON_CEA TYPE STRING,
ADJUST_INFORMATION TYPE STRING,
AMENITIES_LF_AMNT TYPE STRING,
AMENITIES_LFA_UNIT TYPE STRING,
AMENITIES_LFA_UNIT_ISO TYPE STRING,
AREA_SIZE TYPE STRING,
AREA_SIZE_UNIT TYPE STRING,
AREA_SIZE_UNIT_ISO TYPE STRING,
CALCULATED_SHARE TYPE STRING,
MODIFIED_SHARE TYPE STRING,
CALCULATED_INCREASE TYPE STRING,
MODIFIED_INCREASE TYPE STRING,
CALCULATED_PASS_ON_DATE TYPE STRING,
MODIFIED_PASS_ON_DATE TYPE STRING,
CONDITION_TYPE TYPE STRING,
MAIN_CONDITION_TYPE TYPE STRING,
REFERENCE_CONDITION_TYPE TYPE STRING,
END_SEQUENCE_NO TYPE STRING,
HEAD_SEQUENCE_NO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI_RE_PRESTAGE_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_BAPI_RE_PRESTAGE_STR-OBJECT_TYPE sy-vline 
WA_BAPI_RE_PRESTAGE_STR-OBJECT_ID sy-vline 
WA_BAPI_RE_PRESTAGE_STR-SEQUENCE_NO sy-vline 
WA_BAPI_RE_PRESTAGE_STR-EXPENSE_ITEM sy-vline 
WA_BAPI_RE_PRESTAGE_STR-EXPENSE_SEQUENCE_NO sy-vline 
WA_BAPI_RE_PRESTAGE_STR-ADJUST_SEQUENCE_NO sy-vline 
WA_BAPI_RE_PRESTAGE_STR-ADJUST_OBJECT_TYPE sy-vline 
WA_BAPI_RE_PRESTAGE_STR-ADJUST_OBJECT_ID sy-vline 
WA_BAPI_RE_PRESTAGE_STR-USE_FOR_ADJUSTMENT sy-vline 
WA_BAPI_RE_PRESTAGE_STR-IS_REJECTED sy-vline 
WA_BAPI_RE_PRESTAGE_STR-ADJUST_REASON sy-vline 
WA_BAPI_RE_PRESTAGE_STR-ADJUST_REASON_CEA sy-vline 
WA_BAPI_RE_PRESTAGE_STR-ADJUST_INFORMATION sy-vline 
WA_BAPI_RE_PRESTAGE_STR-AMENITIES_LF_AMNT sy-vline 
WA_BAPI_RE_PRESTAGE_STR-AMENITIES_LFA_UNIT sy-vline 
WA_BAPI_RE_PRESTAGE_STR-AMENITIES_LFA_UNIT_ISO sy-vline 
WA_BAPI_RE_PRESTAGE_STR-AREA_SIZE sy-vline 
WA_BAPI_RE_PRESTAGE_STR-AREA_SIZE_UNIT sy-vline 
WA_BAPI_RE_PRESTAGE_STR-AREA_SIZE_UNIT_ISO sy-vline 
WA_BAPI_RE_PRESTAGE_STR-CALCULATED_SHARE sy-vline 
WA_BAPI_RE_PRESTAGE_STR-MODIFIED_SHARE sy-vline 
WA_BAPI_RE_PRESTAGE_STR-CALCULATED_INCREASE sy-vline 
WA_BAPI_RE_PRESTAGE_STR-MODIFIED_INCREASE sy-vline 
WA_BAPI_RE_PRESTAGE_STR-CALCULATED_PASS_ON_DATE sy-vline 
WA_BAPI_RE_PRESTAGE_STR-MODIFIED_PASS_ON_DATE sy-vline 
WA_BAPI_RE_PRESTAGE_STR-CONDITION_TYPE sy-vline 
WA_BAPI_RE_PRESTAGE_STR-MAIN_CONDITION_TYPE sy-vline 
WA_BAPI_RE_PRESTAGE_STR-REFERENCE_CONDITION_TYPE sy-vline 
WA_BAPI_RE_PRESTAGE_STR-END_SEQUENCE_NO sy-vline 
WA_BAPI_RE_PRESTAGE_STR-HEAD_SEQUENCE_NO sy-vline      INTO ld_text SEPARATED BY SPACE.

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