ABAP Select data from SAP table REEW_DIFF_SIZE_FLURST 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 REEW_DIFF_SIZE_FLURST 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 REEW_DIFF_SIZE_FLURST. 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 REEW_DIFF_SIZE_FLURST 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_REEW_DIFF_SIZE_FLURST TYPE STANDARD TABLE OF REEW_DIFF_SIZE_FLURST,
      WA_REEW_DIFF_SIZE_FLURST TYPE REEW_DIFF_SIZE_FLURST,
      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: <REEW_DIFF_SIZE_FLURST> TYPE REEW_DIFF_SIZE_FLURST.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEW_DIFF_SIZE_FLURST
*  INTO TABLE @DATA(IT_REEW_DIFF_SIZE_FLURST2).
*--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_REEW_DIFF_SIZE_FLURST INDEX 1 INTO DATA(WA_REEW_DIFF_SIZE_FLURST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REEW_DIFF_SIZE_FLURST>-EIGENTUEMER = 1.
<REEW_DIFF_SIZE_FLURST>-EINHWYEAR = 1.
<REEW_DIFF_SIZE_FLURST>-XEIGENT = 1.
<REEW_DIFF_SIZE_FLURST>-EINHWNR = 1.
<REEW_DIFF_SIZE_FLURST>-LAND1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REEW_DIFF_SIZE_FLURST-LANDX, sy-vline,
  WA_REEW_DIFF_SIZE_FLURST-BUNDESLAND, sy-vline,
  WA_REEW_DIFF_SIZE_FLURST-BEZEI, sy-vline,
  WA_REEW_DIFF_SIZE_FLURST-GEMARKUNG, sy-vline,
  WA_REEW_DIFF_SIZE_FLURST-XGEMARK, sy-vline,
  WA_REEW_DIFF_SIZE_FLURST-FLUR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REEW_DIFF_SIZE_FLURST 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_REEW_DIFF_SIZE_FLURST 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_REEW_DIFF_SIZE_FLURST INTO WA_REEW_DIFF_SIZE_FLURST.


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

*Conversion exit GJAHR, internal->external for field EINHWYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REEW_DIFF_SIZE_FLURST-EINHWYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEW_DIFF_SIZE_FLURST-EINHWYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field EINHEIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REEW_DIFF_SIZE_FLURST-EINHEIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEW_DIFF_SIZE_FLURST-EINHEIT.
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_REEW_DIFF_SIZE_FLURST_STR, 
EIGENTUEMER TYPE STRING,
EINHWYEAR TYPE STRING,
XEIGENT TYPE STRING,
EINHWNR TYPE STRING,
LAND1 TYPE STRING,
LANDX TYPE STRING,
BUNDESLAND TYPE STRING,
BEZEI TYPE STRING,
GEMARKUNG TYPE STRING,
XGEMARK TYPE STRING,
FLUR TYPE STRING,
FLURSTUECK TYPE STRING,
FLURSTKZ TYPE STRING,
FLAECHE TYPE STRING,
FEINS TYPE STRING,
FLSTFLAECHE TYPE STRING,
EINHEIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEW_DIFF_SIZE_FLURST_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_REEW_DIFF_SIZE_FLURST_STR-EIGENTUEMER sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-EINHWYEAR sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-XEIGENT sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-EINHWNR sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-LAND1 sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-LANDX sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-BUNDESLAND sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-BEZEI sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-GEMARKUNG sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-XGEMARK sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-FLUR sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-FLURSTUECK sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-FLURSTKZ sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-FLAECHE sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-FEINS sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-FLSTFLAECHE sy-vline 
WA_REEW_DIFF_SIZE_FLURST_STR-EINHEIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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